Repository: MetaState-Prototype-Project/prototype
Pull request #98: Feat/w3id log generation
Author: login: coodos
Created: 2025-04-09T08:18:43Z | Merged: 2025-04-14T14:18:13Z

# Description of change

Add key rotation stuff 

## Issue Number
closes #18 
closes #19
closes #20 
closes #21 

## Type of change

- New (a change which implements a new feature)

## How the change has been tested

## Change checklist

- [x] I have ensured that the CI Checks pass locally
- [x] I have removed any unnecessary logic
- [x] My code is well documented
- [x] I have signed my commits
- [x] My code follows the pattern of the application
- [x] I have self reviewed my code


<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit

- **New Features**
  - Introduced new dependencies to enhance functionality.
  - Added new error classes to improve error handling for specific conditions in log management.
  - Implemented a log manager class for generating and managing historic event logs.
  - Added utility functions for data type conversions and array operations, improving data handling capabilities.

- **Bug Fixes**
  - Enhanced error handling for log event creation, addressing potential issues with invalid options.

- **Tests**
  - Established a suite of unit tests for logging and codec utilities, ensuring functionality and robustness through various scenarios.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Linked issue #18: [feature] W3ID: Implement Pre-Rotation Key Setup
# Description

Establish the configuration and handling for pre-rotation keys. This task involves reading the pre-rotation parameters (such as updateKeys and nextKeyHashes) from the application's configuration. The implementation should validate these keys and ensure they’re correctly passed to the rotation process.

# Reference

```mermaid
%%{init: {"theme": "default"}}%%
graph LR
    CA[Consumer Application]
    WF[W3ID Factory]
    PRK[Pre-Rotation Key Setup]

    CA -->|Provides rotation config with pre-rotation keys| WF
    WF -->|Extracts updateKeys & nextKeyHashes| PRK
```

# Acceptance Criteria

Pre-rotation configuration is available and validated.
The W3ID Factory accepts pre-rotation keys (update keys and next key hashes) as part of its setup.
Unit tests verify correct key parsing and error handling for invalid configuration.

Diff:
diff --git a/infrastructure/w3id/package.json b/infrastructure/w3id/package.json
index 8c415e512..a278bb85d 100644
--- a/infrastructure/w3id/package.json
+++ b/infrastructure/w3id/package.json
@@ -19,6 +19,9 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
+    "canonicalize": "^2.1.0",
+    "multiformats": "^13.3.2",
+    "tweetnacl": "^1.0.3",
     "uuid": "^11.1.0"
   },
   "devDependencies": {
diff --git a/infrastructure/w3id/src/errors/errors.ts b/infrastructure/w3id/src/errors/errors.ts
new file mode 100644
index 000000000..4a314b081
--- /dev/null
+++ b/infrastructure/w3id/src/errors/errors.ts
@@ -0,0 +1,34 @@
+export class MalformedIndexChainError extends Error {
+	constructor(message: string = "Malformed index chain detected") {
+		super(message);
+		this.name = "MalformedIndexChainError";
+	}
+}
+
+export class MalformedHashChainError extends Error {
+	constructor(message: string = "Malformed hash chain detected") {
+		super(message);
+		this.name = "MalformedHashChainError";
+	}
+}
+
+export class BadSignatureError extends Error {
+	constructor(message: string = "Bad signature detected") {
+		super(message);
+		this.name = "BadSignatureError";
+	}
+}
+
+export class BadNextKeySpecifiedError extends Error {
+	constructor(message: string = "Bad next key specified") {
+		super(message);
+		this.name = "BadNextKeySpecifiedError";
+	}
+}
+
+export class BadOptionsSpecifiedError extends Error {
+	constructor(message: string = "Bad options specified") {
+		super(message);
+		this.name = "BadOptionsSpecifiedError";
+	}
+}
diff --git a/infrastructure/w3id/src/logs/log-manager.ts b/infrastructure/w3id/src/logs/log-manager.ts
new file mode 100644
index 000000000..b69e3dc20
--- /dev/null
+++ b/infrastructure/w3id/src/logs/log-manager.ts
@@ -0,0 +1,148 @@
+import canonicalize from "canonicalize";
+import {
+	BadNextKeySpecifiedError,
+	BadOptionsSpecifiedError,
+	BadSignatureError,
+	MalformedHashChainError,
+	MalformedIndexChainError,
+} from "../errors/errors";
+import { isSubsetOf } from "../utils/array";
+import { hash } from "../utils/hash";
+import {
+	isGenesisOptions,
+	isRotationOptions,
+	type CreateLogEventOptions,
+	type GenesisLogOptions,
+	type LogEvent,
+	type RotationLogOptions,
+	type VerifierCallback,
+} from "./log.types";
+import type { StorageSpec } from "./storage/storage-spec";
+
+/**
+ * Class to generate historic event logs for all historic events for an Identifier
+ * starting with generating it's first log entry
+ */
+
+// TODO: Create a specification link inside our docs for how generation of identifier works
+
+export class IDLogManager {
+	repository: StorageSpec<LogEvent, LogEvent>;
+
+	constructor(repository: StorageSpec<LogEvent, LogEvent>) {
+		this.repository = repository;
+	}
+
+	static async validateLogChain(
+		log: LogEvent[],
+		verifyCallback: VerifierCallback,
+	) {
+		let currIndex = 0;
+		let currentNextKeyHashesSeen: string[] = [];
+		let lastUpdateKeysSeen: string[] = [];
+		let lastHash: string | null = null;
+
+		for (const e of log) {
+			const [_index, _hash] = e.versionId.split("-");
+			const index = Number(_index);
+			if (currIndex !== index) throw new MalformedIndexChainError();
+			const hashedUpdateKeys = await Promise.all(
+				e.updateKeys.map(async (k) => await hash(k)),
+			);
+			if (index > 0) {
+				const updateKeysSeen = isSubsetOf(
+					hashedUpdateKeys,
+					currentNextKeyHashesSeen,
+				);
+				if (!updateKeysSeen || lastHash !== _hash)
+					throw new MalformedHashChainError();
+			}
+
+			currentNextKeyHashesSeen = e.nextKeyHashes;
+			await IDLogManager.verifyLogEventProof(
+				e,
+				lastUpdateKeysSeen.length > 0 ? lastUpdateKeysSeen : e.updateKeys,
+				verifyCallback,
+			);
+			lastUpdateKeysSeen = e.updateKeys;
+			currIndex++;
+			lastHash = await hash(canonicalize(e) as string);
+		}
+		return true;
+	}
+
+	private static async verifyLogEventProof(
+		e: LogEvent,
+		currentUpdateKeys: string[],
+		verifyCallback: VerifierCallback,
+	) {
+		const proof = e.proof;
+		const copy = JSON.parse(JSON.stringify(e));
+		// biome-ignore lint/performance/noDelete: we need to delete proof completely
+		delete copy.proof;
+		const canonicalJson = canonicalize(copy);
+		let verified = false;
+		if (!proof) throw new BadSignatureError("No proof found in the log event.");
+		for (const key of currentUpdateKeys) {
+			const signValidates = await verifyCallback(
+				canonicalJson as string,
+				proof,
+				key,
+			);
+			if (signValidates) verified = true;
+		}
+		if (!verified) throw new BadSignatureError();
+	}
+
+	private async appendEntry(entries: LogEvent[], options: RotationLogOptions) {
+		const { signer, nextKeyHashes, nextKeySigner } = options;
+		const latestEntry = entries[entries.length - 1];
+		const logHash = await hash(latestEntry);
+		const index = Number(latestEntry.versionId.split("-")[0]) + 1;
+
+		const currKeyHash = await hash(nextKeySigner.pubKey);
+		if (!latestEntry.nextKeyHashes.includes(currKeyHash))
+			throw new BadNextKeySpecifiedError();
+
+		const logEvent: LogEvent = {
+			id: latestEntry.id,
+			versionTime: new Date(Date.now()),
+			versionId: `${index}-${logHash}`,
+			updateKeys: [nextKeySigner.pubKey],
+			nextKeyHashes: nextKeyHashes,
+			method: "w3id:v0.0.0",
+		};
+
+		const proof = await signer.sign(canonicalize(logEvent) as string);
+		logEvent.proof = proof;
+
+		await this.repository.create(logEvent);
+		return logEvent;
+	}
+
+	private async createGenesisEntry(options: GenesisLogOptions) {
+		const { id, nextKeyHashes, signer } = options;
+		const logEvent: LogEvent = {
+			id,
+			versionId: `0-${id.split("@")[1]}`,
+			versionTime: new Date(Date.now()),
+			updateKeys: [signer.pubKey],
+			nextKeyHashes: nextKeyHashes,
+			method: "w3id:v0.0.0",
+		};
+		const proof = await signer.sign(canonicalize(logEvent) as string);
+		logEvent.proof = proof;
+		await this.repository.create(logEvent);
+		return logEvent;
+	}
+
+	async createLogEvent(options: CreateLogEventOptions) {
+		const entries = await this.repository.findMany({});
+		if (entries.length > 0) {
+			if (!isRotationOptions(options)) throw new BadOptionsSpecifiedError();
+			return this.appendEntry(entries, options);
+		}
+		if (!isGenesisOptions(options)) throw new BadOptionsSpecifiedError();
+		return this.createGenesisEntry(options);
+	}
+}
diff --git a/infrastructure/w3id/src/logs/log.types.ts b/infrastructure/w3id/src/logs/log.types.ts
new file mode 100644
index 000000000..2f03b3115
--- /dev/null
+++ b/infrastructure/w3id/src/logs/log.types.ts
@@ -0,0 +1,45 @@
+export type LogEvent = {
+	id: string;
+	versionId: string;
+	versionTime: Date;
+	updateKeys: string[];
+	nextKeyHashes: string[];
+	method: `w3id:v${string}`;
+	proof?: string;
+};
+
+export type VerifierCallback = (
+	message: string,
+	signature: string,
+	pubKey: string,
+) => Promise<boolean>;
+
+export type Signer = {
+	sign: (message: string) => Promise<string> | string;
+	pubKey: string;
+};
+
+export type RotationLogOptions = {
+	nextKeyHashes: string[];
+	signer: Signer;
+	nextKeySigner: Signer;
+};
+
+export type GenesisLogOptions = {
+	nextKeyHashes: string[];
+	id: string;
+	signer: Signer;
+};
+
+export function isGenesisOptions(
+	options: CreateLogEventOptions,
+): options is GenesisLogOptions {
+	return "id" in options;
+}
+export function isRotationOptions(
+	options: CreateLogEventOptions,
+): options is RotationLogOptions {
+	return "nextKeySigner" in options;
+}
+
+export type CreateLogEventOptions = GenesisLogOptions | RotationLogOptions;
diff --git a/infrastructure/w3id/src/logs/store.ts b/infrastructure/w3id/src/logs/store.ts
deleted file mode 100644
index e69de29bb..000000000
diff --git a/infrastructure/w3id/src/utils/array.ts b/infrastructure/w3id/src/utils/array.ts
new file mode 100644
index 000000000..19224fec4
--- /dev/null
+++ b/infrastructure/w3id/src/utils/array.ts
@@ -0,0 +1,28 @@
+/**
+ * Utility function to check if A is subset of B
+ *
+ * @param a Array to check if it's a subset
+ * @param b Array to check against
+ * @returns true if every element in 'a' is present in 'b' with at least the same frequency
+ * @example
+ * isSubsetOf([1, 2], [1, 2, 3]) // returns true
+ * isSubsetOf([1, 1, 2], [1, 2, 3]) // returns false (not enough 1's in b)
+ * isSubsetOf([], [1, 2]) // returns true (empty set is a subset of any set)
+ */
+
+export function isSubsetOf(a: unknown[], b: unknown[]) {
+	const map = new Map();
+
+	for (const el of b) {
+		map.set(el, (map.get(el) || 0) + 1);
+	}
+
+	for (const el of a) {
+		if (!map.has(el) || map.get(el) === 0) {
+			return false;
+		}
+		map.set(el, map.get(el) - 1);
+	}
+
+	return true;
+}
diff --git a/infrastructure/w3id/src/utils/codec.ts b/infrastructure/w3id/src/utils/codec.ts
new file mode 100644
index 000000000..f05ce212e
--- /dev/null
+++ b/infrastructure/w3id/src/utils/codec.ts
@@ -0,0 +1,20 @@
+export function uint8ArrayToHex(bytes: Uint8Array): string {
+	return Array.from(bytes)
+		.map((b) => b.toString(16).padStart(2, "0"))
+		.join("");
+}
+
+export function hexToUint8Array(hex: string): Uint8Array {
+	if (hex.length % 2 !== 0) {
+		throw new Error("Hex string must have an even length");
+	}
+	const bytes = new Uint8Array(hex.length / 2);
+	for (let i = 0; i < hex.length; i += 2) {
+		bytes[i / 2] = Number.parseInt(hex.slice(i, i + 2), 16);
+	}
+	return bytes;
+}
+
+export function stringToUint8Array(str: string): Uint8Array {
+	return new TextEncoder().encode(str);
+}
diff --git a/infrastructure/w3id/src/utils/hash.ts b/infrastructure/w3id/src/utils/hash.ts
new file mode 100644
index 000000000..d7e8c8525
--- /dev/null
+++ b/infrastructure/w3id/src/utils/hash.ts
@@ -0,0 +1,26 @@
+import canonicalize from "canonicalize";
+import { uint8ArrayToHex } from "./codec";
+
+export async function hash(
+	input: string | Record<string, unknown>,
+): Promise<string> {
+	let dataToHash: string;
+
+	if (typeof input === "string") {
+		dataToHash = input;
+	} else {
+		const canonical = canonicalize(input);
+		if (!canonical) {
+			throw new Error(
+				`Failed to canonicalize object: ${JSON.stringify(input).substring(0, 100)}...`,
+			);
+		}
+		dataToHash = canonical;
+	}
+
+	const buffer = new TextEncoder().encode(dataToHash);
+	const hashBuffer = await crypto.subtle.digest("SHA-256", buffer);
+	const hashHex = uint8ArrayToHex(new Uint8Array(hashBuffer));
+
+	return hashHex;
+}
diff --git a/infrastructure/w3id/tests/logs/log.test.ts b/infrastructure/w3id/tests/logs/log.test.ts
new file mode 100644
index 000000000..90db3bbce
--- /dev/null
+++ b/infrastructure/w3id/tests/logs/log.test.ts
@@ -0,0 +1,206 @@
+import { StorageSpec } from "../../src/logs/storage/storage-spec.ts";
+import {
+    LogEvent,
+    Signer,
+    VerifierCallback,
+} from "../../src/logs/log.types.ts";
+import { IDLogManager } from "../../src/logs/log-manager";
+import { generateUuid } from "../../src/utils/uuid";
+import { describe, expect, test, expectTypeOf } from "vitest";
+import { hash } from "../../src/utils/hash";
+import nacl from "tweetnacl";
+import {
+    uint8ArrayToHex,
+    stringToUint8Array,
+    hexToUint8Array,
+} from "../../src/utils/codec";
+import { base58btc } from "multiformats/bases/base58";
+import falso from "@ngneat/falso";
+import {
+    BadNextKeySpecifiedError,
+    BadOptionsSpecifiedError,
+    BadSignatureError,
+    MalformedHashChainError,
+    MalformedIndexChainError,
+} from "../../src/errors/errors.ts";
+
+class InMemoryStorage<T extends LogEvent, K extends LogEvent>
+    implements StorageSpec<T, K>
+{
+    private data: K[] = [];
+
+    public static build<T extends LogEvent, K extends LogEvent>(): StorageSpec<
+        T,
+        K
+    > {
+        return new InMemoryStorage<T, K>();
+    }
+
+    public async create(body: T): Promise<K> {
+        const entry = body as unknown as K;
+        this.data.push(entry);
+        return entry;
+    }
+
+    public async findOne(options: Partial<K>): Promise<K> {
+        const result = this.data.find((item) =>
+            Object.entries(options).every(
+                ([key, value]) => item[key as keyof K] === value,
+            ),
+        );
+
+        if (!result) throw new Error("Not found");
+        return result;
+    }
+
+    public async findMany(options: Partial<K>): Promise<K[]> {
+        return this.data.filter((item) =>
+            Object.entries(options).every(
+                ([key, value]) => item[key as keyof K] === value,
+            ),
+        );
+    }
+}
+const logManager = new IDLogManager(InMemoryStorage.build());
+const w3id = `@${generateUuid("asdfa")}`;
+
+const keyPair = nacl.sign.keyPair();
+let currNextKey = nacl.sign.keyPair();
+
+const verifierCallback: VerifierCallback = async (
+    message: string,
+    signature: string,
+    pubKey: string,
+) => {
+    const signatureBuffer = base58btc.decode(signature);
+    const messageBuffer = stringToUint8Array(message);
+    const publicKey = hexToUint8Array(pubKey);
+    const isValid = nacl.sign.detached.verify(
+        messageBuffer,
+        signatureBuffer,
+        publicKey,
+    );
+
+    return isValid;
+};
+
+function createSigner(keyPair: nacl.SignKeyPair): Signer {
+    const publicKey = uint8ArrayToHex(keyPair.publicKey);
+    const signer: Signer = {
+        pubKey: publicKey,
+        sign: (str: string) => {
+            const buffer = stringToUint8Array(str);
+            const signature = nacl.sign.detached(buffer, keyPair.secretKey);
+            return base58btc.encode(signature);
+        },
+    };
+    return signer;
+}
+
+describe("LogManager", async () => {
+    test("GenesisEvent: [Throw at Bad Options]", async () => {
+        const nextKeyHash = await hash(uint8ArrayToHex(currNextKey.publicKey));
+        const signer = createSigner(keyPair);
+        const logEvent = logManager.createLogEvent({
+            nextKeySigner: signer,
+            nextKeyHashes: [nextKeyHash],
+            signer,
+        });
+        await expect(logEvent).rejects.toThrow(BadOptionsSpecifiedError);
+    });
+
+    test("GenesisEvent: [Creates Entry]", async () => {
+        const nextKeyHash = await hash(uint8ArrayToHex(currNextKey.publicKey));
+        const signer = createSigner(keyPair);
+        const logEvent = await logManager.createLogEvent({
+            id: w3id,
+            nextKeyHashes: [nextKeyHash],
+            signer,
+        });
+        expectTypeOf(logEvent).toMatchObjectType<LogEvent>();
+    });
+
+    test("KeyRotation: [Throw At Bad Options]", async () => {
+        const nextKeyPair = nacl.sign.keyPair();
+        const nextKeyHash = await hash(uint8ArrayToHex(nextKeyPair.publicKey));
+
+        const signer = createSigner(nextKeyPair);
+        const logEvent = logManager.createLogEvent({
+            nextKeyHashes: [nextKeyHash],
+            signer,
+            id: `@{falso.randUuid()}`,
+        });
+
+        await expect(logEvent).rejects.toThrow(BadOptionsSpecifiedError);
+    });
+
+    test("KeyRotation: [Error At Wrong Next Key]", async () => {
+        const nextKeyPair = nacl.sign.keyPair();
+        const nextKeyHash = await hash(uint8ArrayToHex(nextKeyPair.publicKey));
+
+        const signer = createSigner(nextKeyPair);
+        const nextKeySigner = createSigner(nextKeyPair);
+        const logEvent = logManager.createLogEvent({
+            nextKeyHashes: [nextKeyHash],
+            signer,
+            nextKeySigner,
+        });
+
+        await expect(logEvent).rejects.toThrow(BadNextKeySpecifiedError);
+    });
+
+    test("KeyRotation: [Creates Entry]", async () => {
+        const nextKeyPair = nacl.sign.keyPair();
+        const nextKeyHash = await hash(uint8ArrayToHex(nextKeyPair.publicKey));
+
+        const signer = createSigner(keyPair);
+        const nextKeySigner = createSigner(currNextKey);
+        const logEvent = await logManager.createLogEvent({
+            nextKeyHashes: [nextKeyHash],
+            signer,
+            nextKeySigner,
+        });
+
+        expectTypeOf(logEvent).toMatchObjectType<LogEvent>();
+    });
+
+    test("Verification: [Verifies Correct Chain]", async () => {
+        const events = await logManager.repository.findMany({});
+        const result = await IDLogManager.validateLogChain(
+            events,
+            verifierCallback,
+        );
+        expect(result).toBe(true);
+    });
+
+    test("Verification: [Throws on Malformed Index Chain]", async () => {
+        const _events = await logManager.repository.findMany({});
+        const events = JSON.parse(JSON.stringify(_events));
+        events[1].versionId = `2-${falso.randUuid()}`;
+        const result = IDLogManager.validateLogChain(events, verifierCallback);
+
+        await expect(result).rejects.toThrow(MalformedIndexChainError);
+    });
+
+    test("Verification: [Throws on Malformed Hash Chain]", async () => {
+        const _events = await logManager.repository.findMany({});
+        const events = JSON.parse(JSON.stringify(_events));
+        events[1].versionId = `1-${falso.randUuid()}`;
+        const result = IDLogManager.validateLogChain(events, verifierCallback);
+
+        await expect(result).rejects.toThrow(MalformedHashChainError);
+    });
+
+    test("Verification: [Throws on Wrong Signature]", async () => {
+        const _events = await logManager.repository.findMany({});
+        const events = JSON.parse(JSON.stringify(_events));
+        const newKeyPair = nacl.sign.keyPair();
+        const signer = createSigner(newKeyPair);
+
+        delete events[1].proof;
+        events[1].proof = await signer.sign(events[1]);
+        const result = IDLogManager.validateLogChain(events, verifierCallback);
+
+        await expect(result).rejects.toThrow(BadSignatureError);
+    });
+});
diff --git a/infrastructure/w3id/tests/utils/codec.test.ts b/infrastructure/w3id/tests/utils/codec.test.ts
new file mode 100644
index 000000000..b0bd388b5
--- /dev/null
+++ b/infrastructure/w3id/tests/utils/codec.test.ts
@@ -0,0 +1,33 @@
+import {
+  uint8ArrayToHex,
+  hexToUint8Array,
+  stringToUint8Array,
+} from "../../src/utils/codec";
+import { describe, test, expect } from "vitest";
+
+describe("Codec", () => {
+  test("uint8ArrayToHex", () => {
+    const input = new Uint8Array([1, 2, 3, 4]);
+    const expected = "01020304";
+    expect(uint8ArrayToHex(input)).toBe(expected);
+  });
+
+  test("hexToUint8Array", () => {
+    const input = "01020304";
+    const expected = new Uint8Array([1, 2, 3, 4]);
+    expect(hexToUint8Array(input)).toEqual(expected);
+  });
+
+  test("hexToUint8Array (Odd Length)", () => {
+    const input = "010203045";
+    expect(() => hexToUint8Array(input)).toThrow(
+      "Hex string must have an even length",
+    );
+  });
+
+  test("stringToUint8Array", () => {
+    const input = "hello";
+    const expected = new Uint8Array([104, 101, 108, 108, 111]);
+    expect(stringToUint8Array(input)).toEqual(expected);
+  });
+});
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 6d9d6bf3e..6ec4c7075 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -146,6 +146,15 @@ importers:
 
   infrastructure/w3id:
     dependencies:
+      canonicalize:
+        specifier: ^2.1.0
+        version: 2.1.0
+      multiformats:
+        specifier: ^13.3.2
+        version: 13.3.2
+      tweetnacl:
+        specifier: ^1.0.3
+        version: 1.0.3
       uuid:
         specifier: ^11.1.0
         version: 11.1.0
@@ -1497,6 +1506,10 @@ packages:
   caniuse-lite@1.0.30001706:
     resolution: {integrity: sha512-3ZczoTApMAZwPKYWmwVbQMFpXBDds3/0VciVoUwPUbldlYyVLmRVuRs/PcUZtHpbLRpzzDvrvnFuREsGt6lUug==}
 
+  canonicalize@2.1.0:
+    resolution: {integrity: sha512-F705O3xrsUtgt98j7leetNhTWPe+5S72rlL5O4jA1pKqBVQ/dT1O1D6PFxmSXvc0SUOinWS57DKx0I3CHrXJHQ==}
+    hasBin: true
+
   chai@5.2.0:
     resolution: {integrity: sha512-mCuXncKXk5iCLhfhwTc0izo0gtEmpz5CtG2y8GiOINBlMVS6v8TMRc5TaLWKS6692m9+dVVfzgeVxR5UxWHTYw==}
     engines: {node: '>=12'}
@@ -2504,6 +2517,9 @@ packages:
       typescript:
         optional: true
 
+  multiformats@13.3.2:
+    resolution: {integrity: sha512-qbB0CQDt3QKfiAzZ5ZYjLFOs+zW43vA4uyM8g27PeEuXZybUOFyjrVdP93HPBHMoglibwfkdVwbzfUq8qGcH6g==}
+
   mute-stream@2.0.0:
     resolution: {integrity: sha512-WWdIxpyjEn+FhQJQQv9aQAYlHoNVdzIzUySNV1gHUPDSdZJ3yZn7pAAbQcV7B56Mvu881q9FZV+0Vx2xC44VWA==}
     engines: {node: ^18.17.0 || >=20.5.0}
@@ -3127,6 +3143,9 @@ packages:
   tween-functions@1.2.0:
     resolution: {integrity: sha512-PZBtLYcCLtEcjL14Fzb1gSxPBeL7nWvGhO5ZFPGqziCcr8uvHp0NDmdjBchp6KHL+tExcg0m3NISmKxhU394dA==}
 
+  tweetnacl@1.0.3:
+    resolution: {integrity: sha512-6rt+RN7aOi1nGMyC4Xa5DdYiukl2UWCbcJft7YhxReBGQD7OAM8Pbxw6YMo4r2diNEA8FEmu32YOn9rhaiE5yw==}
+
   type-check@0.4.0:
     resolution: {integrity: sha512-XleUoc9uwGXqjWwXaUTZAmzMcFZ5858QA2vvx1Ur5xIcixXIP+8LnFDgRplU30us6teqdlskFfu+ae4K79Ooew==}
     engines: {node: '>= 0.8.0'}
@@ -4832,6 +4851,8 @@ snapshots:
 
   caniuse-lite@1.0.30001706: {}
 
+  canonicalize@2.1.0: {}
+
   chai@5.2.0:
     dependencies:
       assertion-error: 2.0.1
@@ -6005,6 +6026,8 @@ snapshots:
       - '@types/node'
     optional: true
 
+  multiformats@13.3.2: {}
+
   mute-stream@2.0.0: {}
 
   nanoid@3.3.11: {}
@@ -6652,6 +6675,8 @@ snapshots:
 
   tween-functions@1.2.0: {}
 
+  tweetnacl@1.0.3: {}
+
   type-check@0.4.0:
     dependencies:
       prelude-ls: 1.2.1


Reviews:
user: login: coodos
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-04-09T08:32:55Z
user: login: sosweetham
state: COMMENTED
author_association: MEMBER
submitted_at: 2025-04-09T08:51:37Z
user: login: sosweetham
state: COMMENTED
author_association: MEMBER
submitted_at: 2025-04-09T08:56:57Z
user: login: sosweetham
state: COMMENTED
author_association: MEMBER
submitted_at: 2025-04-09T08:59:46Z
user: login: coodos
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-04-09T10:46:39Z
user: login: sosweetham
state: COMMENTED
author_association: MEMBER
submitted_at: 2025-04-09T11:20:57Z
user: login: sosweetham
state: COMMENTED
author_association: MEMBER
submitted_at: 2025-04-09T12:14:45Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 1**

<details>
<summary>♻️ Duplicate comments (2)</summary><blockquote>

<details>
<summary>infrastructure/w3id/src/logs/log.types.ts (1)</summary><blockquote>

`1-9`: **Consider renaming `LogEvent` for clarity.**  
The past review comment suggested that `LogEvent` is ambiguous and should be renamed to a more descriptive name (e.g., `EventType`). This aligns with prior feedback and might improve clarity.

</blockquote></details>
<details>
<summary>infrastructure/w3id/src/logs/log-manager.ts (1)</summary><blockquote>

`74-95`: _🛠️ Refactor suggestion_

**Clarify error case in `verifyLogEventProof`.**  
When `!proof`, the code simply throws a generic `Error()`. Consider throwing a more descriptive error class (like `BadSignatureError` or similar) for better debugging consistency.  

```diff
 if (!proof) {
-  throw new Error();
+  throw new BadSignatureError("No proof found in the log event.");
 }
```

</blockquote></details>

</blockquote></details>

<details>
<summary>🧹 Nitpick comments (12)</summary><blockquote>

<details>
<summary>infrastructure/w3id/src/utils/array.ts (4)</summary><blockquote>

`1-4`: **Documentation should be more detailed.**

The function documentation is quite minimal. Consider expanding it to include:
- Parameter descriptions
- Return value explanation
- Example usage
- Edge case handling


```diff
 /**
  * Utility function to check if A is subset of B
+ * 
+ * @param a Array to check if it's a subset
+ * @param b Array to check against
+ * @returns true if every element in 'a' is present in 'b' with at least the same frequency
+ * @example
+ * isSubsetOf([1, 2], [1, 2, 3]) // returns true
+ * isSubsetOf([1, 1, 2], [1, 2, 3]) // returns false (not enough 1's in b)
+ * isSubsetOf([], [1, 2]) // returns true (empty set is a subset of any set)
  */
```

---

`5-5`: **Consider using more type-safe parameters.**

Using `unknown[]` provides flexibility but may lead to unexpected behavior with complex objects. Consider using generics to maintain type safety while preserving flexibility.


```diff
-export function isSubsetOf(a: unknown[], b: unknown[]) {
+export function isSubsetOf<T>(a: T[], b: T[]): boolean {
```

---

`5-20`: **Consider adding error handling for edge cases.**

The function doesn't explicitly handle cases where the inputs might be `null` or `undefined`, which could lead to runtime errors.


```diff
 export function isSubsetOf(a: unknown[], b: unknown[]) {
+	if (!Array.isArray(a) || !Array.isArray(b)) {
+		throw new TypeError('Both arguments must be arrays');
+	}
+
 	const map = new Map();

 	for (const el of b) {
```

---

`6-17`: **Consider using more descriptive variable names.**

The variable names `a`, `b`, and `el` are very generic. More descriptive names would make the code more readable.


```diff
-export function isSubsetOf(a: unknown[], b: unknown[]) {
-	const map = new Map();
+export function isSubsetOf(subset: unknown[], superset: unknown[]) {
+	const elementCounts = new Map();

-	for (const el of b) {
-		map.set(el, (map.get(el) || 0) + 1);
+	for (const element of superset) {
+		elementCounts.set(element, (elementCounts.get(element) || 0) + 1);
 	}

-	for (const el of a) {
-		if (!map.has(el) || map.get(el) === 0) {
+	for (const element of subset) {
+		if (!elementCounts.has(element) || elementCounts.get(element) === 0) {
 			return false;
 		}
-		map.set(el, map.get(el) - 1);
+		elementCounts.set(element, elementCounts.get(element) - 1);
 	}
```

</blockquote></details>
<details>
<summary>infrastructure/w3id/src/errors/errors.ts (1)</summary><blockquote>

`1-9`: **Consider enhancing error classes with constructors and context information**

While the error classes are correctly extending the base Error class, they lack custom constructors and contextual properties. This limits their usefulness in providing detailed error information.


Consider enhancing the error classes with custom constructors:

```diff
-export class MalformedIndexChainError extends Error {}
+export class MalformedIndexChainError extends Error {
+  constructor(message: string = "Malformed index chain detected") {
+    super(message);
+    this.name = "MalformedIndexChainError";
+  }
+}

-export class MalformedHashChainError extends Error {}
+export class MalformedHashChainError extends Error {
+  constructor(message: string = "Malformed hash chain detected") {
+    super(message);
+    this.name = "MalformedHashChainError";
+  }
+}

// Apply similar pattern to other error classes
```

This would provide more descriptive error messages and make it easier to identify the error type in stack traces.

</blockquote></details>
<details>
<summary>infrastructure/w3id/src/utils/hash.ts (1)</summary><blockquote>

`1-26`: **Well-implemented hash function with a minor opportunity for reuse**

The hash function implementation correctly handles both string and object inputs with appropriate canonicalization. The SHA-256 algorithm is a good choice for this use case.



Consider two minor improvements:
1. Provide more context in the canonicalization error message:
```diff
-throw new Error("Failed to canonicalize object");
+throw new Error(`Failed to canonicalize object: ${JSON.stringify(input).substring(0, 100)}...`);
```

2. The hex conversion logic at lines 21-23 could be extracted to a reusable function, as similar logic appears in the codec.ts file:
```diff
-const hashHex = hashArray
-  .map((b) => b.toString(16).padStart(2, "0"))
-  .join("");
+import { uint8ArrayToHex } from "./codec";
+const hashHex = uint8ArrayToHex(new Uint8Array(hashBuffer));
```

This would require resolving any circular dependencies if they occur.

</blockquote></details>
<details>
<summary>infrastructure/w3id/src/logs/log.types.ts (2)</summary><blockquote>

`17-20`: **Rename overshadowed parameter in `sign`.**  
In the `Signer` type, the parameter `(string: string)` shadows the type name. Consider renaming it to `message: string` or similar to avoid confusion.  

```diff
 type Signer = {
-  sign: (string: string) => Promise<string> | string;
+  sign: (message: string) => Promise<string> | string;
   pubKey: string;
 };
```

---

`22-26`: **Optional alignment between `RotationLogOptions` and `GenesisLogOptions`.**  
Both interfaces share similar fields such as `nextKeyHashes` and `signer`. If your roadmap allows, consider consolidating common properties in a base interface to reduce duplication.  



Also applies to: 28-32, 45-45

</blockquote></details>
<details>
<summary>infrastructure/w3id/tests/logs/log.test.ts (2)</summary><blockquote>

`27-63`: **Ensure robust error handling in `InMemoryStorage`.**  
The `Not found` error is quite generic. Consider using or extending your domain-specific errors for consistency and clarity when an item is missing.

---

`200-200`: **Avoid performance overhead from `delete` operator.**  
Static analysis warns that using `delete` may have performance impacts. You could set `events[1].proof = undefined;` instead to handle property removal while avoiding potential performance pitfalls.  

```diff
- delete events[1].proof;
+ events[1].proof = undefined;
```

<details>
<summary>🧰 Tools</summary>

<details>
<summary>🪛 Biome (1.9.4)</summary>

[error] 200-200: Avoid the delete operator which can impact performance.

Unsafe fix: Use an undefined assignment instead.


(lint/performance/noDelete)

</details>

</details>

</blockquote></details>
<details>
<summary>infrastructure/w3id/src/logs/log-manager.ts (2)</summary><blockquote>

`27-27`: **Add documentation for the TODO.**  
A TODO is noted, but it’s unclear what the specification link should contain. Please clarify the doc reference or remove the TODO if no longer needed.

---

`97-121`: **Watch for concurrency in `appendEntry`.**  
If multiple clients concurrently append, you might need to ensure no race conditions occur with reading `latestEntry` from storage. Consider synchronizing or using transaction logic if concurrency is expected.

</blockquote></details>

</blockquote></details>

<details>
<summary>📜 Review details</summary>

**Configuration used: CodeRabbit UI**
**Review profile: CHILL**
**Plan: Pro**

<details>
<summary>📥 Commits</summary>

Reviewing files that changed from the base of the PR and between a3560771946e9020fdac8252a2ad19a26510e234 and 504240344dc9d2b25c2210b305c83c738b091df9.

</details>

<details>
<summary>⛔ Files ignored due to path filters (1)</summary>

* `pnpm-lock.yaml` is excluded by `!**/pnpm-lock.yaml`

</details>

<details>
<summary>📒 Files selected for processing (8)</summary>

* `infrastructure/w3id/package.json` (1 hunks)
* `infrastructure/w3id/src/errors/errors.ts` (1 hunks)
* `infrastructure/w3id/src/logs/log-manager.ts` (1 hunks)
* `infrastructure/w3id/src/logs/log.types.ts` (1 hunks)
* `infrastructure/w3id/src/utils/array.ts` (1 hunks)
* `infrastructure/w3id/src/utils/codec.ts` (1 hunks)
* `infrastructure/w3id/src/utils/hash.ts` (1 hunks)
* `infrastructure/w3id/tests/logs/log.test.ts` (1 hunks)

</details>

<details>
<summary>🧰 Additional context used</summary>

<details>
<summary>🧬 Code Graph Analysis (1)</summary>

<details>
<summary>infrastructure/w3id/src/logs/log-manager.ts (4)</summary><blockquote>

<details>
<summary>infrastructure/w3id/src/logs/log.types.ts (7)</summary>

* `LogEvent` (1-9)
* `VerifierCallback` (11-15)
* `RotationLogOptions` (22-26)
* `GenesisLogOptions` (28-32)
* `CreateLogEventOptions` (45-45)
* `isRotationOptions` (39-43)
* `isGenesisOptions` (34-38)

</details>
<details>
<summary>infrastructure/w3id/src/errors/errors.ts (5)</summary>

* `MalformedIndexChainError` (1-1)
* `MalformedHashChainError` (3-3)
* `BadSignatureError` (5-5)
* `BadNextKeySpecifiedError` (7-7)
* `BadOptionsSpecifiedError` (9-9)

</details>
<details>
<summary>infrastructure/w3id/src/utils/hash.ts (1)</summary>

* `hash` (3-26)

</details>
<details>
<summary>infrastructure/w3id/src/utils/array.ts (1)</summary>

* `isSubsetOf` (5-20)

</details>

</blockquote></details>

</details><details>
<summary>🪛 Biome (1.9.4)</summary>

<details>
<summary>infrastructure/w3id/tests/logs/log.test.ts</summary>

[error] 200-200: Avoid the delete operator which can impact performance.

Unsafe fix: Use an undefined assignment instead.


(lint/performance/noDelete)

</details>

</details>

</details>

<details>
<summary>🔇 Additional comments (10)</summary><blockquote>

<details>
<summary>infrastructure/w3id/src/utils/array.ts (1)</summary>

`5-20`: **Function implementation is correct and efficient.**

The implementation correctly checks if array `a` is a subset of array `b` using a Map to track element occurrences, handling duplicates properly. The time complexity is O(|a| + |b|) which is optimal for this operation.

</details>
<details>
<summary>infrastructure/w3id/package.json (1)</summary>

`22-24`: **New dependencies added for W3ID infrastructure**

The addition of these three dependencies is appropriate for the key rotation functionality being implemented:
- `canonicalize` for consistent JSON serialization (used in hash.ts)
- `multiformats` for handling various data formats
- `tweetnacl` for cryptographic operations (signatures, verification)

All are using caret versioning which allows for compatible updates while maintaining major version stability.

</details>
<details>
<summary>infrastructure/w3id/src/utils/codec.ts (3)</summary>

`1-5`: **Well-implemented hex encoding function**

The `uint8ArrayToHex` function efficiently converts binary data to a hexadecimal string representation using a clean approach with proper zero-padding.

---

`7-16`: **Thorough implementation with proper validation**

The `hexToUint8Array` function correctly validates input and efficiently converts hex strings to binary data. The validation for even-length strings is particularly important for preventing errors.

---

`18-20`: **Simple and effective string to binary conversion**

The `stringToUint8Array` function uses the standard TextEncoder API, which is the correct approach for converting strings to binary data in modern JavaScript environments.

</details>
<details>
<summary>infrastructure/w3id/src/logs/log.types.ts (1)</summary>

`34-43`: **Good use of type guards.**  
The `isGenesisOptions` and `isRotationOptions` functions correctly narrow the union type. It helps ensure type safety when handling log creation logic and improves maintainability.

</details>
<details>
<summary>infrastructure/w3id/tests/logs/log.test.ts (2)</summary>

`70-85`: **Good approach to signature verification**  
Implementing a `verifierCallback` that decodes and verifies signatures with `tweetnacl` is clear. This helps ensure the correctness of logs while keeping cryptographic operations modular.

---

`87-98`: **Clean signer creation.**  
The `createSigner` helper is straightforward and matches your sign/verify logic, promoting test clarity. Good job verifying that the correct signature is produced.

</details>
<details>
<summary>infrastructure/w3id/src/logs/log-manager.ts (2)</summary>

`36-72`: **Comprehensive log chain validation.**  
The `validateLogChain` method properly checks index sequences, hash matching, and calls `verifyLogEventProof`. This coverage fosters robust chain integrity. Good job.

---

`139-147`: **Concise creation logic**  
Using `isRotationOptions` or `isGenesisOptions` to branch logic is clean and maintainable. Properly throws `BadOptionsSpecifiedError` for mismatching options.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-04-09T12:42:35Z
user: login: dkraemerwork
state: APPROVED
author_association: NONE
submitted_at: 2025-04-09T15:20:28Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 0**

<details>
<summary>🧹 Nitpick comments (2)</summary><blockquote>

<details>
<summary>infrastructure/w3id/tests/utils/codec.test.ts (2)</summary><blockquote>

`1-7`: **Remove unused import.**

The `falso` import from "@ngneat/falso" is not used anywhere in this test file and should be removed.

```diff
import {
  uint8ArrayToHex,
  hexToUint8Array,
  stringToUint8Array,
} from "../../src/utils/codec";
-import falso from "@ngneat/falso";
import { describe, test, expect } from "vitest";
```

---

`9-34`: **Consider adding more edge case tests.**

While the current tests cover basic functionality, consider adding tests for:
- Empty inputs for all functions
- Non-hexadecimal characters for `hexToUint8Array`
- Unicode characters for `stringToUint8Array`

This would improve test coverage and ensure robustness of these utility functions.

</blockquote></details>

</blockquote></details>

<details>
<summary>📜 Review details</summary>

**Configuration used: CodeRabbit UI**
**Review profile: CHILL**
**Plan: Pro**

<details>
<summary>📥 Commits</summary>

Reviewing files that changed from the base of the PR and between 504240344dc9d2b25c2210b305c83c738b091df9 and 9c3543098c7d14303460a0c283c98070167b9ff2.

</details>

<details>
<summary>📒 Files selected for processing (1)</summary>

* `infrastructure/w3id/tests/utils/codec.test.ts` (1 hunks)

</details>

<details>
<summary>🧰 Additional context used</summary>

<details>
<summary>🧬 Code Graph Analysis (1)</summary>

<details>
<summary>infrastructure/w3id/tests/utils/codec.test.ts (1)</summary><blockquote>

<details>
<summary>infrastructure/w3id/src/utils/codec.ts (3)</summary>

* `uint8ArrayToHex` (1-5)
* `hexToUint8Array` (7-16)
* `stringToUint8Array` (18-20)

</details>

</blockquote></details>

</details>

</details>

<details>
<summary>🔇 Additional comments (4)</summary><blockquote>

<details>
<summary>infrastructure/w3id/tests/utils/codec.test.ts (4)</summary>

`10-14`: **Test looks good.**

The test case for `uint8ArrayToHex` properly verifies the expected behavior with a simple input array.

---

`16-20`: **Test looks good.**

The test case for `hexToUint8Array` correctly verifies the conversion from hex string to Uint8Array.

---

`22-27`: **Test looks good.**

The test appropriately verifies the error handling for invalid input (odd-length hex string).

---

`29-33`: **Test looks good.**

The test case for `stringToUint8Array` correctly verifies UTF-8 encoding of a simple string.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-04-09T15:30:29Z
user: login: sosweetham
state: COMMENTED
author_association: MEMBER
submitted_at: 2025-04-09T15:36:59Z
user: login: sosweetham
state: COMMENTED
author_association: MEMBER
submitted_at: 2025-04-09T15:38:10Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 0**

<details>
<summary>🧹 Nitpick comments (3)</summary><blockquote>

<details>
<summary>infrastructure/w3id/src/utils/array.ts (1)</summary><blockquote>

`1-11`: **Consider clarifying how non-primitive array elements are handled.**  
The doc examples focus on numeric elements, but the function parameters are typed as `unknown[]`. When arrays contain objects or other complex types, this code relies on reference equality, which may be unintuitive.

</blockquote></details>
<details>
<summary>infrastructure/w3id/src/logs/log-manager.ts (2)</summary><blockquote>

`27-27`: **Replace TODO comment with an issue reference.**  
Longstanding TODOs can become stale. Consider removing the comment and opening an issue to track documentation improvements.  

Do you want help creating an issue for this?

---

`36-72`: **Check for undefined `canonicalize(e)`.**  
While `canonicalize` normally returns a string, in edge cases it could return undefined. Consider handling or validating the return before casting to string.

</blockquote></details>

</blockquote></details>

<details>
<summary>📜 Review details</summary>

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<details>
<summary>📥 Commits</summary>

Reviewing files that changed from the base of the PR and between 9c3543098c7d14303460a0c283c98070167b9ff2 and af977ed5bb028d01dd36b322ec01c19889b139e0.

</details>

<details>
<summary>📒 Files selected for processing (3)</summary>

* `infrastructure/w3id/src/logs/log-manager.ts` (1 hunks)
* `infrastructure/w3id/src/utils/array.ts` (1 hunks)
* `infrastructure/w3id/tests/utils/codec.test.ts` (1 hunks)

</details>

<details>
<summary>🚧 Files skipped from review as they are similar to previous changes (1)</summary>

* infrastructure/w3id/tests/utils/codec.test.ts

</details>

<details>
<summary>🧰 Additional context used</summary>

<details>
<summary>🧬 Code Graph Analysis (1)</summary>

<details>
<summary>infrastructure/w3id/src/logs/log-manager.ts (4)</summary><blockquote>

<details>
<summary>infrastructure/w3id/src/logs/log.types.ts (7)</summary>

* `LogEvent` (1-9)
* `VerifierCallback` (11-15)
* `RotationLogOptions` (22-26)
* `GenesisLogOptions` (28-32)
* `CreateLogEventOptions` (45-45)
* `isRotationOptions` (39-43)
* `isGenesisOptions` (34-38)

</details>
<details>
<summary>infrastructure/w3id/src/errors/errors.ts (5)</summary>

* `MalformedIndexChainError` (1-1)
* `MalformedHashChainError` (3-3)
* `BadSignatureError` (5-5)
* `BadNextKeySpecifiedError` (7-7)
* `BadOptionsSpecifiedError` (9-9)

</details>
<details>
<summary>infrastructure/w3id/src/utils/hash.ts (1)</summary>

* `hash` (3-26)

</details>
<details>
<summary>infrastructure/w3id/src/utils/array.ts (1)</summary>

* `isSubsetOf` (13-28)

</details>

</blockquote></details>

</details>

</details>

<details>
<summary>🔇 Additional comments (8)</summary><blockquote>

<details>
<summary>infrastructure/w3id/src/utils/array.ts (1)</summary>

`13-28`: **Verify intended behavior for reference equality.**  
If arrays contain objects, the map checks by strict object reference. Confirm that this is the desired behavior and doesn't require a deep comparison. Otherwise, you might need a custom comparator or hashing approach for object elements.

</details>
<details>
<summary>infrastructure/w3id/src/logs/log-manager.ts (7)</summary>

`1-21`: **Imports and type references look good.**  
No issues found with the imported modules or type references.

---

`22-25`: **Doc comment for IDLogManager is succinct and clear.**  
Provides a concise overview of the class responsibilities.

---

`29-34`: **Constructor implementation is straightforward.**  
No potential issues found; it properly assigns the repository.

---

`74-95`: **No major concerns in log event proof verification.**  
The logic and error handling are properly scoped.

---

`97-121`: **Rotation entry logic appears correct.**  
It validates the signer's key against `latestEntry.nextKeyHashes` and constructs a new log event. Implementation aligns with the code's stated objectives.

---

`123-137`: **Ensure that the ID contains an '@' delimiter.**  
Splitting `id` by '@' might result in `undefined` for `versionId` if there's no separator. Confirm or sanitize `id` to ensure valid `versionId` strings are produced.

---

`139-148`: **createLogEvent method is cohesive and well-structured.**  
The logic cleanly branches between genesis and rotation flows.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-04-09T15:39:13Z
user: login: sosweetham
state: COMMENTED
author_association: MEMBER
submitted_at: 2025-04-09T15:42:22Z
user: login: sosweetham
state: COMMENTED
author_association: MEMBER
submitted_at: 2025-04-09T15:45:30Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 1**

<details>
<summary>🧹 Nitpick comments (1)</summary><blockquote>

<details>
<summary>infrastructure/w3id/src/utils/hash.ts (1)</summary><blockquote>

`27-28`: **Consider adding try/catch for crypto operations.**

While the function has error handling for canonicalization, it might be beneficial to add try/catch blocks around the crypto operations to handle potential errors from `crypto.subtle.digest`.


```diff
  let dataToHash: string;

  if (typeof input === "string") {
    dataToHash = input;
  } else {
    const canonical = canonicalize(input);
    if (!canonical) {
      throw new Error(
        `Failed to canonicalize object: ${JSON.stringify(input).substring(0, 100)}...`,
      );
    }
    dataToHash = canonical;
  }

  const buffer = new TextEncoder().encode(dataToHash);
+ try {
    const hashBuffer = await crypto.subtle.digest("SHA-256", buffer);
    const hashHex = uint8ArrayToHex(
      new Uint8Array(hashBuffer),
    );

    return hashHex;
+ } catch (error) {
+   throw new Error(`Failed to compute hash: ${error instanceof Error ? error.message : String(error)}`);
+ }
}
```

</blockquote></details>

</blockquote></details>

<details>
<summary>📜 Review details</summary>

**Configuration used: CodeRabbit UI**
**Review profile: CHILL**
**Plan: Pro**

<details>
<summary>📥 Commits</summary>

Reviewing files that changed from the base of the PR and between af977ed5bb028d01dd36b322ec01c19889b139e0 and 123fa494398362ca0eb90b94edda11b2657c1cf1.

</details>

<details>
<summary>📒 Files selected for processing (2)</summary>

* `infrastructure/w3id/src/errors/errors.ts` (1 hunks)
* `infrastructure/w3id/src/utils/hash.ts` (1 hunks)

</details>

<details>
<summary>🚧 Files skipped from review as they are similar to previous changes (1)</summary>

* infrastructure/w3id/src/errors/errors.ts

</details>

<details>
<summary>🧰 Additional context used</summary>

<details>
<summary>🧬 Code Graph Analysis (1)</summary>

<details>
<summary>infrastructure/w3id/src/utils/hash.ts (1)</summary><blockquote>

<details>
<summary>infrastructure/w3id/src/utils/codec.ts (1)</summary>

* `uint8ArrayToHex` (1-5)

</details>

</blockquote></details>

</details>

</details>

<details>
<summary>🔇 Additional comments (3)</summary><blockquote>

<details>
<summary>infrastructure/w3id/src/utils/hash.ts (3)</summary>

`1-3`: **Good choice of imports for the hashing utility.**

The `canonicalize` package is appropriate for ensuring consistent JSON representation of objects, and importing `uint8ArrayToHex` from a local utility module follows good modular design principles.

---

`4-6`: **Function signature is well-defined.**

The async function declaration with proper TypeScript typings (string or Record input, Promise<string> output) provides a clear contract to callers.

---

`7-19`: **Input validation and canonicalization handling is thorough.**

The code properly handles both string and object inputs, with appropriate error handling when canonicalization fails. The error message includes a truncated version of the input which is helpful for debugging without overwhelming logs.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-04-09T15:55:10Z
user: login: sosweetham
state: COMMENTED
author_association: MEMBER
submitted_at: 2025-04-09T15:57:09Z
user: login: coderabbitai[bot]
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-04-09T15:57:28Z
user: login: JulienAuvo
state: APPROVED
author_association: CONTRIBUTOR
submitted_at: 2025-04-14T14:18:02Z

Review comments:
diff_hunk: @@ -0,0 +1,35 @@
+export type LogEvent = {
+	id: string;
+	versionId: string;
+	versionTime: Date;
+	updateKeys: string[];
+	nextKeyHashes: string[];
+	method: `w3id:v${string}`;
+	proof?: string;
+};
+
+export enum LogEvents {
+	Rotation = 0,
+	Genesis = 1,
+}
path: infrastructure/w3id/src/logs/log.types.ts
user: login: coodos
body: `LogEvents` and `LogEvent` are very ambiguous, shall rename to EventType instead
created_at: 2025-04-09T08:31:55Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,141 @@
+import canonicalize from "canonicalize";
+import {
+	BadSignatureError,
+	MalformedHashChainError,
+	MalformedIndexChainError,
+} from "../errors/errors";
+import { isSubsetOf } from "../utils/array";
+import { hash } from "../utils/hash";
+import {
+	type CreateLogEventOptions,
+	type GenesisLogOptions,
+	type LogEvent,
+	LogEvents,
+	type RotationLogOptions,
+	type VerifierCallback,
+} from "./log.types";
+import type { StorageSpec } from "./storage/storage-spec";
+
+/**
+ * Class to generate historic event logs for all historic events for an Identifier
+ * starting with generating it's first log entry
+ */
+
+// TODO: Create a specification link inside our docs for how generation of identifier works
+
+export class IDLogManager {
+	repository: StorageSpec<LogEvent, LogEvent>;
+
+	constructor(repository: StorageSpec<LogEvent, LogEvent>) {
+		this.repository = repository;
+	}
+
+	static async validateLogChain(
+		log: LogEvent[],
+		verifyCallback: VerifierCallback,
+	) {
+		let currIndex = 0;
+		let currentNextKeyHashesSeen: string[] = [];
+		let lastUpdateKeysSeen: string[] = [];
+		let lastHash: string | null = null;
+
+		for (const e of log) {
+			const [_index, _hash] = e.versionId.split("-");
+			const index = Number(_index);
+			if (currIndex !== index) throw new MalformedIndexChainError();
+			const hashedUpdateKeys = await Promise.all(
+				e.updateKeys.map(async (k) => await hash(k)),
+			);
+			if (index > 0) {
+				const updateKeysSeen = isSubsetOf(
+					hashedUpdateKeys,
+					currentNextKeyHashesSeen,
+				);
+				if (!updateKeysSeen || lastHash !== _hash)
+					throw new MalformedHashChainError();
+			}
+
+			currentNextKeyHashesSeen = e.nextKeyHashes;
+			await IDLogManager.verifyLogEventProof(
+				e,
+				lastUpdateKeysSeen.length > 0 ? lastUpdateKeysSeen : e.updateKeys,
+				verifyCallback,
+			);
+			lastUpdateKeysSeen = e.updateKeys;
+			currIndex++;
+			lastHash = await hash(canonicalize(e) as string);
+		}
+		return true;
+	}
+
+	private static async verifyLogEventProof(
+		e: LogEvent,
+		currentUpdateKeys: string[],
+		verifyCallback: VerifierCallback,
+	) {
+		const proof = e.proof;
+		const copy = JSON.parse(JSON.stringify(e));
+		// biome-ignore lint/performance/noDelete: we need to delete proof completely
+		delete copy.proof;
+		const canonicalJson = canonicalize(copy);
+		let verified = false;
+		if (!proof) throw new Error();
+		for (const key of currentUpdateKeys) {
+			const signValidates = await verifyCallback(
+				canonicalJson as string,
+				proof,
+				key,
+			);
+			if (signValidates) verified = true;
+		}
+		if (!verified) throw new BadSignatureError();
+	}
+
+	private async appendEntry(entries: LogEvent[], options: RotationLogOptions) {
+		const { signer, nextKeyHashes, nextKeySigner } = options;
+		const latestEntry = entries[entries.length - 1];
+		const logHash = await hash(latestEntry);
+		const index = Number(latestEntry.versionId.split("-")[0]) + 1;
+
+		const currKeyHash = await hash(nextKeySigner.pubKey);
+		if (!latestEntry.nextKeyHashes.includes(currKeyHash)) throw new Error();
path: infrastructure/w3id/src/logs/log-manager.ts
user: login: coodos
body: Add proper error type here
created_at: 2025-04-09T08:32:48Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,143 @@
+import canonicalize from "canonicalize";
+import {
+	BadNextKeySpecifiedError,
+	BadSignatureError,
+	MalformedHashChainError,
+	MalformedIndexChainError,
+} from "../errors/errors";
+import { isSubsetOf } from "../utils/array";
+import { hash } from "../utils/hash";
+import {
+	type CreateLogEventOptions,
+	type GenesisLogOptions,
+	type LogEvent,
+	LogEventType,
+	type RotationLogOptions,
+	type VerifierCallback,
+} from "./log.types";
+import type { StorageSpec } from "./storage/storage-spec";
+
+/**
+ * Class to generate historic event logs for all historic events for an Identifier
+ * starting with generating it's first log entry
+ */
+
+// TODO: Create a specification link inside our docs for how generation of identifier works
+
+export class IDLogManager {
+	repository: StorageSpec<LogEvent, LogEvent>;
+
+	constructor(repository: StorageSpec<LogEvent, LogEvent>) {
+		this.repository = repository;
+	}
+
+	static async validateLogChain(
+		log: LogEvent[],
+		verifyCallback: VerifierCallback,
+	) {
+		let currIndex = 0;
+		let currentNextKeyHashesSeen: string[] = [];
+		let lastUpdateKeysSeen: string[] = [];
+		let lastHash: string | null = null;
+
+		for (const e of log) {
+			const [_index, _hash] = e.versionId.split("-");
+			const index = Number(_index);
+			if (currIndex !== index) throw new MalformedIndexChainError();
+			const hashedUpdateKeys = await Promise.all(
+				e.updateKeys.map(async (k) => await hash(k)),
+			);
+			if (index > 0) {
+				const updateKeysSeen = isSubsetOf(
+					hashedUpdateKeys,
+					currentNextKeyHashesSeen,
+				);
+				if (!updateKeysSeen || lastHash !== _hash)
+					throw new MalformedHashChainError();
+			}
+
+			currentNextKeyHashesSeen = e.nextKeyHashes;
+			await IDLogManager.verifyLogEventProof(
+				e,
+				lastUpdateKeysSeen.length > 0 ? lastUpdateKeysSeen : e.updateKeys,
+				verifyCallback,
+			);
+			lastUpdateKeysSeen = e.updateKeys;
+			currIndex++;
+			lastHash = await hash(canonicalize(e) as string);
+		}
+		return true;
+	}
+
+	private static async verifyLogEventProof(
+		e: LogEvent,
+		currentUpdateKeys: string[],
+		verifyCallback: VerifierCallback,
+	) {
+		const proof = e.proof;
+		const copy = JSON.parse(JSON.stringify(e));
+		// biome-ignore lint/performance/noDelete: we need to delete proof completely
+		delete copy.proof;
+		const canonicalJson = canonicalize(copy);
+		let verified = false;
+		if (!proof) throw new Error();
+		for (const key of currentUpdateKeys) {
+			const signValidates = await verifyCallback(
+				canonicalJson as string,
+				proof,
+				key,
+			);
+			if (signValidates) verified = true;
+		}
+		if (!verified) throw new BadSignatureError();
+	}
+
+	private async appendEntry(entries: LogEvent[], options: RotationLogOptions) {
+		const { signer, nextKeyHashes, nextKeySigner } = options;
+		const latestEntry = entries[entries.length - 1];
+		const logHash = await hash(latestEntry);
+		const index = Number(latestEntry.versionId.split("-")[0]) + 1;
+
+		const currKeyHash = await hash(nextKeySigner.pubKey);
+		if (!latestEntry.nextKeyHashes.includes(currKeyHash))
+			throw new BadNextKeySpecifiedError();
+
+		const logEvent: LogEvent = {
+			id: latestEntry.id,
+			versionTime: new Date(Date.now()),
+			versionId: `${index}-${logHash}`,
+			updateKeys: [nextKeySigner.pubKey],
+			nextKeyHashes: nextKeyHashes,
path: infrastructure/w3id/src/logs/log-manager.ts
user: login: sosweetham
body: comparing to webvh, 

what's the reason for not having these nested under `parameters`
created_at: 2025-04-09T08:51:08Z
author_association: MEMBER
diff_hunk: @@ -0,0 +1,143 @@
+import canonicalize from "canonicalize";
+import {
+	BadNextKeySpecifiedError,
+	BadSignatureError,
+	MalformedHashChainError,
+	MalformedIndexChainError,
+} from "../errors/errors";
+import { isSubsetOf } from "../utils/array";
+import { hash } from "../utils/hash";
+import {
+	type CreateLogEventOptions,
+	type GenesisLogOptions,
+	type LogEvent,
+	LogEventType,
+	type RotationLogOptions,
+	type VerifierCallback,
+} from "./log.types";
+import type { StorageSpec } from "./storage/storage-spec";
+
+/**
+ * Class to generate historic event logs for all historic events for an Identifier
+ * starting with generating it's first log entry
+ */
+
+// TODO: Create a specification link inside our docs for how generation of identifier works
+
+export class IDLogManager {
+	repository: StorageSpec<LogEvent, LogEvent>;
+
+	constructor(repository: StorageSpec<LogEvent, LogEvent>) {
+		this.repository = repository;
+	}
+
+	static async validateLogChain(
+		log: LogEvent[],
+		verifyCallback: VerifierCallback,
+	) {
+		let currIndex = 0;
+		let currentNextKeyHashesSeen: string[] = [];
+		let lastUpdateKeysSeen: string[] = [];
+		let lastHash: string | null = null;
+
+		for (const e of log) {
+			const [_index, _hash] = e.versionId.split("-");
+			const index = Number(_index);
+			if (currIndex !== index) throw new MalformedIndexChainError();
+			const hashedUpdateKeys = await Promise.all(
+				e.updateKeys.map(async (k) => await hash(k)),
+			);
+			if (index > 0) {
+				const updateKeysSeen = isSubsetOf(
+					hashedUpdateKeys,
+					currentNextKeyHashesSeen,
+				);
+				if (!updateKeysSeen || lastHash !== _hash)
+					throw new MalformedHashChainError();
+			}
+
+			currentNextKeyHashesSeen = e.nextKeyHashes;
+			await IDLogManager.verifyLogEventProof(
+				e,
+				lastUpdateKeysSeen.length > 0 ? lastUpdateKeysSeen : e.updateKeys,
+				verifyCallback,
+			);
+			lastUpdateKeysSeen = e.updateKeys;
+			currIndex++;
+			lastHash = await hash(canonicalize(e) as string);
+		}
+		return true;
+	}
+
+	private static async verifyLogEventProof(
+		e: LogEvent,
+		currentUpdateKeys: string[],
+		verifyCallback: VerifierCallback,
+	) {
+		const proof = e.proof;
+		const copy = JSON.parse(JSON.stringify(e));
+		// biome-ignore lint/performance/noDelete: we need to delete proof completely
+		delete copy.proof;
+		const canonicalJson = canonicalize(copy);
+		let verified = false;
+		if (!proof) throw new Error();
+		for (const key of currentUpdateKeys) {
+			const signValidates = await verifyCallback(
+				canonicalJson as string,
+				proof,
+				key,
+			);
+			if (signValidates) verified = true;
+		}
+		if (!verified) throw new BadSignatureError();
+	}
+
+	private async appendEntry(entries: LogEvent[], options: RotationLogOptions) {
+		const { signer, nextKeyHashes, nextKeySigner } = options;
+		const latestEntry = entries[entries.length - 1];
+		const logHash = await hash(latestEntry);
+		const index = Number(latestEntry.versionId.split("-")[0]) + 1;
+
+		const currKeyHash = await hash(nextKeySigner.pubKey);
+		if (!latestEntry.nextKeyHashes.includes(currKeyHash))
+			throw new BadNextKeySpecifiedError();
+
+		const logEvent: LogEvent = {
+			id: latestEntry.id,
path: infrastructure/w3id/src/logs/log-manager.ts
user: login: sosweetham
body: why not under `state`
created_at: 2025-04-09T08:51:24Z
author_association: MEMBER
diff_hunk: @@ -0,0 +1,143 @@
+import canonicalize from "canonicalize";
+import {
+	BadNextKeySpecifiedError,
+	BadSignatureError,
+	MalformedHashChainError,
+	MalformedIndexChainError,
+} from "../errors/errors";
+import { isSubsetOf } from "../utils/array";
+import { hash } from "../utils/hash";
+import {
+	type CreateLogEventOptions,
+	type GenesisLogOptions,
+	type LogEvent,
+	LogEventType,
+	type RotationLogOptions,
+	type VerifierCallback,
+} from "./log.types";
+import type { StorageSpec } from "./storage/storage-spec";
+
+/**
+ * Class to generate historic event logs for all historic events for an Identifier
+ * starting with generating it's first log entry
+ */
+
+// TODO: Create a specification link inside our docs for how generation of identifier works
+
+export class IDLogManager {
+	repository: StorageSpec<LogEvent, LogEvent>;
+
+	constructor(repository: StorageSpec<LogEvent, LogEvent>) {
+		this.repository = repository;
+	}
+
+	static async validateLogChain(
+		log: LogEvent[],
+		verifyCallback: VerifierCallback,
+	) {
+		let currIndex = 0;
+		let currentNextKeyHashesSeen: string[] = [];
+		let lastUpdateKeysSeen: string[] = [];
+		let lastHash: string | null = null;
+
+		for (const e of log) {
+			const [_index, _hash] = e.versionId.split("-");
+			const index = Number(_index);
+			if (currIndex !== index) throw new MalformedIndexChainError();
+			const hashedUpdateKeys = await Promise.all(
+				e.updateKeys.map(async (k) => await hash(k)),
+			);
+			if (index > 0) {
+				const updateKeysSeen = isSubsetOf(
+					hashedUpdateKeys,
+					currentNextKeyHashesSeen,
+				);
+				if (!updateKeysSeen || lastHash !== _hash)
+					throw new MalformedHashChainError();
+			}
+
+			currentNextKeyHashesSeen = e.nextKeyHashes;
+			await IDLogManager.verifyLogEventProof(
+				e,
+				lastUpdateKeysSeen.length > 0 ? lastUpdateKeysSeen : e.updateKeys,
+				verifyCallback,
+			);
+			lastUpdateKeysSeen = e.updateKeys;
+			currIndex++;
+			lastHash = await hash(canonicalize(e) as string);
+		}
+		return true;
+	}
+
+	private static async verifyLogEventProof(
+		e: LogEvent,
+		currentUpdateKeys: string[],
+		verifyCallback: VerifierCallback,
+	) {
+		const proof = e.proof;
+		const copy = JSON.parse(JSON.stringify(e));
+		// biome-ignore lint/performance/noDelete: we need to delete proof completely
+		delete copy.proof;
+		const canonicalJson = canonicalize(copy);
+		let verified = false;
+		if (!proof) throw new Error();
+		for (const key of currentUpdateKeys) {
+			const signValidates = await verifyCallback(
+				canonicalJson as string,
+				proof,
+				key,
+			);
+			if (signValidates) verified = true;
+		}
+		if (!verified) throw new BadSignatureError();
+	}
+
+	private async appendEntry(entries: LogEvent[], options: RotationLogOptions) {
+		const { signer, nextKeyHashes, nextKeySigner } = options;
+		const latestEntry = entries[entries.length - 1];
+		const logHash = await hash(latestEntry);
+		const index = Number(latestEntry.versionId.split("-")[0]) + 1;
+
+		const currKeyHash = await hash(nextKeySigner.pubKey);
+		if (!latestEntry.nextKeyHashes.includes(currKeyHash))
+			throw new BadNextKeySpecifiedError();
path: infrastructure/w3id/src/logs/log-manager.ts
user: login: sosweetham
body: it's possible to have this be called from `createLogEvent` with event type `Rotation` i think a descriptive error might be useful if the genesis entry/previous doesnt exist yet 
created_at: 2025-04-09T08:56:57Z
author_association: MEMBER
diff_hunk: @@ -0,0 +1,143 @@
+import canonicalize from "canonicalize";
+import {
+	BadNextKeySpecifiedError,
+	BadSignatureError,
+	MalformedHashChainError,
+	MalformedIndexChainError,
+} from "../errors/errors";
+import { isSubsetOf } from "../utils/array";
+import { hash } from "../utils/hash";
+import {
+	type CreateLogEventOptions,
+	type GenesisLogOptions,
+	type LogEvent,
+	LogEventType,
+	type RotationLogOptions,
+	type VerifierCallback,
+} from "./log.types";
+import type { StorageSpec } from "./storage/storage-spec";
+
+/**
+ * Class to generate historic event logs for all historic events for an Identifier
+ * starting with generating it's first log entry
+ */
+
+// TODO: Create a specification link inside our docs for how generation of identifier works
+
+export class IDLogManager {
+	repository: StorageSpec<LogEvent, LogEvent>;
+
+	constructor(repository: StorageSpec<LogEvent, LogEvent>) {
+		this.repository = repository;
+	}
+
+	static async validateLogChain(
+		log: LogEvent[],
+		verifyCallback: VerifierCallback,
+	) {
+		let currIndex = 0;
+		let currentNextKeyHashesSeen: string[] = [];
+		let lastUpdateKeysSeen: string[] = [];
+		let lastHash: string | null = null;
+
+		for (const e of log) {
+			const [_index, _hash] = e.versionId.split("-");
+			const index = Number(_index);
+			if (currIndex !== index) throw new MalformedIndexChainError();
+			const hashedUpdateKeys = await Promise.all(
+				e.updateKeys.map(async (k) => await hash(k)),
+			);
+			if (index > 0) {
+				const updateKeysSeen = isSubsetOf(
+					hashedUpdateKeys,
+					currentNextKeyHashesSeen,
+				);
+				if (!updateKeysSeen || lastHash !== _hash)
+					throw new MalformedHashChainError();
+			}
+
+			currentNextKeyHashesSeen = e.nextKeyHashes;
+			await IDLogManager.verifyLogEventProof(
+				e,
+				lastUpdateKeysSeen.length > 0 ? lastUpdateKeysSeen : e.updateKeys,
+				verifyCallback,
+			);
+			lastUpdateKeysSeen = e.updateKeys;
+			currIndex++;
+			lastHash = await hash(canonicalize(e) as string);
+		}
+		return true;
+	}
+
+	private static async verifyLogEventProof(
+		e: LogEvent,
+		currentUpdateKeys: string[],
+		verifyCallback: VerifierCallback,
+	) {
+		const proof = e.proof;
+		const copy = JSON.parse(JSON.stringify(e));
+		// biome-ignore lint/performance/noDelete: we need to delete proof completely
+		delete copy.proof;
+		const canonicalJson = canonicalize(copy);
+		let verified = false;
+		if (!proof) throw new Error();
+		for (const key of currentUpdateKeys) {
+			const signValidates = await verifyCallback(
+				canonicalJson as string,
+				proof,
+				key,
+			);
+			if (signValidates) verified = true;
+		}
+		if (!verified) throw new BadSignatureError();
+	}
+
+	private async appendEntry(entries: LogEvent[], options: RotationLogOptions) {
+		const { signer, nextKeyHashes, nextKeySigner } = options;
+		const latestEntry = entries[entries.length - 1];
+		const logHash = await hash(latestEntry);
+		const index = Number(latestEntry.versionId.split("-")[0]) + 1;
+
+		const currKeyHash = await hash(nextKeySigner.pubKey);
+		if (!latestEntry.nextKeyHashes.includes(currKeyHash))
+			throw new BadNextKeySpecifiedError();
+
+		const logEvent: LogEvent = {
+			id: latestEntry.id,
+			versionTime: new Date(Date.now()),
+			versionId: `${index}-${logHash}`,
+			updateKeys: [nextKeySigner.pubKey],
+			nextKeyHashes: nextKeyHashes,
path: infrastructure/w3id/src/logs/log-manager.ts
user: login: sosweetham
body: mb used a bad source 
created_at: 2025-04-09T08:59:46Z
author_association: MEMBER
diff_hunk: @@ -0,0 +1,143 @@
+import canonicalize from "canonicalize";
+import {
+	BadNextKeySpecifiedError,
+	BadSignatureError,
+	MalformedHashChainError,
+	MalformedIndexChainError,
+} from "../errors/errors";
+import { isSubsetOf } from "../utils/array";
+import { hash } from "../utils/hash";
+import {
+	type CreateLogEventOptions,
+	type GenesisLogOptions,
+	type LogEvent,
+	LogEventType,
+	type RotationLogOptions,
+	type VerifierCallback,
+} from "./log.types";
+import type { StorageSpec } from "./storage/storage-spec";
+
+/**
+ * Class to generate historic event logs for all historic events for an Identifier
+ * starting with generating it's first log entry
+ */
+
+// TODO: Create a specification link inside our docs for how generation of identifier works
+
+export class IDLogManager {
+	repository: StorageSpec<LogEvent, LogEvent>;
+
+	constructor(repository: StorageSpec<LogEvent, LogEvent>) {
+		this.repository = repository;
+	}
+
+	static async validateLogChain(
+		log: LogEvent[],
+		verifyCallback: VerifierCallback,
+	) {
+		let currIndex = 0;
+		let currentNextKeyHashesSeen: string[] = [];
+		let lastUpdateKeysSeen: string[] = [];
+		let lastHash: string | null = null;
+
+		for (const e of log) {
+			const [_index, _hash] = e.versionId.split("-");
+			const index = Number(_index);
+			if (currIndex !== index) throw new MalformedIndexChainError();
+			const hashedUpdateKeys = await Promise.all(
+				e.updateKeys.map(async (k) => await hash(k)),
+			);
+			if (index > 0) {
+				const updateKeysSeen = isSubsetOf(
+					hashedUpdateKeys,
+					currentNextKeyHashesSeen,
+				);
+				if (!updateKeysSeen || lastHash !== _hash)
+					throw new MalformedHashChainError();
+			}
+
+			currentNextKeyHashesSeen = e.nextKeyHashes;
+			await IDLogManager.verifyLogEventProof(
+				e,
+				lastUpdateKeysSeen.length > 0 ? lastUpdateKeysSeen : e.updateKeys,
+				verifyCallback,
+			);
+			lastUpdateKeysSeen = e.updateKeys;
+			currIndex++;
+			lastHash = await hash(canonicalize(e) as string);
+		}
+		return true;
+	}
+
+	private static async verifyLogEventProof(
+		e: LogEvent,
+		currentUpdateKeys: string[],
+		verifyCallback: VerifierCallback,
+	) {
+		const proof = e.proof;
+		const copy = JSON.parse(JSON.stringify(e));
+		// biome-ignore lint/performance/noDelete: we need to delete proof completely
+		delete copy.proof;
+		const canonicalJson = canonicalize(copy);
+		let verified = false;
+		if (!proof) throw new Error();
+		for (const key of currentUpdateKeys) {
+			const signValidates = await verifyCallback(
+				canonicalJson as string,
+				proof,
+				key,
+			);
+			if (signValidates) verified = true;
+		}
+		if (!verified) throw new BadSignatureError();
+	}
+
+	private async appendEntry(entries: LogEvent[], options: RotationLogOptions) {
+		const { signer, nextKeyHashes, nextKeySigner } = options;
+		const latestEntry = entries[entries.length - 1];
+		const logHash = await hash(latestEntry);
+		const index = Number(latestEntry.versionId.split("-")[0]) + 1;
+
+		const currKeyHash = await hash(nextKeySigner.pubKey);
+		if (!latestEntry.nextKeyHashes.includes(currKeyHash))
+			throw new BadNextKeySpecifiedError();
path: infrastructure/w3id/src/logs/log-manager.ts
user: login: coodos
body: what I realised was that I don't need to create different payloads for genesis and rotation event at all 🤡 

if it's the first entry then it does mean that it's genesis and if it's not it's not 
created_at: 2025-04-09T10:46:38Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,143 @@
+import canonicalize from "canonicalize";
+import {
+	BadNextKeySpecifiedError,
+	BadSignatureError,
+	MalformedHashChainError,
+	MalformedIndexChainError,
+} from "../errors/errors";
+import { isSubsetOf } from "../utils/array";
+import { hash } from "../utils/hash";
+import {
+	type CreateLogEventOptions,
+	type GenesisLogOptions,
+	type LogEvent,
+	LogEventType,
+	type RotationLogOptions,
+	type VerifierCallback,
+} from "./log.types";
+import type { StorageSpec } from "./storage/storage-spec";
+
+/**
+ * Class to generate historic event logs for all historic events for an Identifier
+ * starting with generating it's first log entry
+ */
+
+// TODO: Create a specification link inside our docs for how generation of identifier works
+
+export class IDLogManager {
+	repository: StorageSpec<LogEvent, LogEvent>;
+
+	constructor(repository: StorageSpec<LogEvent, LogEvent>) {
+		this.repository = repository;
+	}
+
+	static async validateLogChain(
+		log: LogEvent[],
+		verifyCallback: VerifierCallback,
+	) {
+		let currIndex = 0;
+		let currentNextKeyHashesSeen: string[] = [];
+		let lastUpdateKeysSeen: string[] = [];
+		let lastHash: string | null = null;
+
+		for (const e of log) {
+			const [_index, _hash] = e.versionId.split("-");
+			const index = Number(_index);
+			if (currIndex !== index) throw new MalformedIndexChainError();
+			const hashedUpdateKeys = await Promise.all(
+				e.updateKeys.map(async (k) => await hash(k)),
+			);
+			if (index > 0) {
+				const updateKeysSeen = isSubsetOf(
+					hashedUpdateKeys,
+					currentNextKeyHashesSeen,
+				);
+				if (!updateKeysSeen || lastHash !== _hash)
+					throw new MalformedHashChainError();
+			}
+
+			currentNextKeyHashesSeen = e.nextKeyHashes;
+			await IDLogManager.verifyLogEventProof(
+				e,
+				lastUpdateKeysSeen.length > 0 ? lastUpdateKeysSeen : e.updateKeys,
+				verifyCallback,
+			);
+			lastUpdateKeysSeen = e.updateKeys;
+			currIndex++;
+			lastHash = await hash(canonicalize(e) as string);
+		}
+		return true;
+	}
+
+	private static async verifyLogEventProof(
+		e: LogEvent,
+		currentUpdateKeys: string[],
+		verifyCallback: VerifierCallback,
+	) {
+		const proof = e.proof;
+		const copy = JSON.parse(JSON.stringify(e));
+		// biome-ignore lint/performance/noDelete: we need to delete proof completely
+		delete copy.proof;
+		const canonicalJson = canonicalize(copy);
+		let verified = false;
+		if (!proof) throw new Error();
+		for (const key of currentUpdateKeys) {
+			const signValidates = await verifyCallback(
+				canonicalJson as string,
+				proof,
+				key,
+			);
+			if (signValidates) verified = true;
+		}
+		if (!verified) throw new BadSignatureError();
+	}
+
+	private async appendEntry(entries: LogEvent[], options: RotationLogOptions) {
+		const { signer, nextKeyHashes, nextKeySigner } = options;
+		const latestEntry = entries[entries.length - 1];
+		const logHash = await hash(latestEntry);
+		const index = Number(latestEntry.versionId.split("-")[0]) + 1;
+
+		const currKeyHash = await hash(nextKeySigner.pubKey);
+		if (!latestEntry.nextKeyHashes.includes(currKeyHash))
+			throw new BadNextKeySpecifiedError();
path: infrastructure/w3id/src/logs/log-manager.ts
user: login: sosweetham
body: hmm i saw that the genesis one required id in the payload, there might be some spec stuff i havent read through, but if it doesnt matter then that sounds just fine too 
created_at: 2025-04-09T11:20:57Z
author_association: MEMBER
diff_hunk: @@ -0,0 +1,142 @@
+import canonicalize from "canonicalize";
+import {
+	BadNextKeySpecifiedError,
+	BadSignatureError,
+	MalformedHashChainError,
+	MalformedIndexChainError,
+} from "../errors/errors";
+import { isSubsetOf } from "../utils/array";
+import { hash } from "../utils/hash";
+import {
+	type CreateLogEventOptions,
+	type GenesisLogOptions,
+	type LogEvent,
+	type RotationLogOptions,
+	type VerifierCallback,
+} from "./log.types";
+import type { StorageSpec } from "./storage/storage-spec";
+
+/**
+ * Class to generate historic event logs for all historic events for an Identifier
+ * starting with generating it's first log entry
+ */
+
+// TODO: Create a specification link inside our docs for how generation of identifier works
+
+export class IDLogManager {
+	repository: StorageSpec<LogEvent, LogEvent>;
+
+	constructor(repository: StorageSpec<LogEvent, LogEvent>) {
+		this.repository = repository;
+	}
+
+	static async validateLogChain(
+		log: LogEvent[],
+		verifyCallback: VerifierCallback,
+	) {
+		let currIndex = 0;
+		let currentNextKeyHashesSeen: string[] = [];
+		let lastUpdateKeysSeen: string[] = [];
+		let lastHash: string | null = null;
+
+		for (const e of log) {
+			const [_index, _hash] = e.versionId.split("-");
+			const index = Number(_index);
+			if (currIndex !== index) throw new MalformedIndexChainError();
+			const hashedUpdateKeys = await Promise.all(
+				e.updateKeys.map(async (k) => await hash(k)),
+			);
+			if (index > 0) {
+				const updateKeysSeen = isSubsetOf(
+					hashedUpdateKeys,
+					currentNextKeyHashesSeen,
+				);
+				if (!updateKeysSeen || lastHash !== _hash)
+					throw new MalformedHashChainError();
+			}
+
+			currentNextKeyHashesSeen = e.nextKeyHashes;
+			await IDLogManager.verifyLogEventProof(
+				e,
+				lastUpdateKeysSeen.length > 0 ? lastUpdateKeysSeen : e.updateKeys,
+				verifyCallback,
+			);
+			lastUpdateKeysSeen = e.updateKeys;
+			currIndex++;
+			lastHash = await hash(canonicalize(e) as string);
+		}
+		return true;
+	}
+
+	private static async verifyLogEventProof(
+		e: LogEvent,
+		currentUpdateKeys: string[],
+		verifyCallback: VerifierCallback,
+	) {
+		const proof = e.proof;
+		const copy = JSON.parse(JSON.stringify(e));
+		// biome-ignore lint/performance/noDelete: we need to delete proof completely
+		delete copy.proof;
+		const canonicalJson = canonicalize(copy);
+		let verified = false;
+		if (!proof) throw new Error();
+		for (const key of currentUpdateKeys) {
+			const signValidates = await verifyCallback(
+				canonicalJson as string,
+				proof,
+				key,
+			);
+			if (signValidates) verified = true;
+		}
+		if (!verified) throw new BadSignatureError();
+	}
+
+	private async appendEntry(entries: LogEvent[], options: RotationLogOptions) {
+		const { signer, nextKeyHashes, nextKeySigner } = options;
+		const latestEntry = entries[entries.length - 1];
+		const logHash = await hash(latestEntry);
+		const index = Number(latestEntry.versionId.split("-")[0]) + 1;
+
+		const currKeyHash = await hash(nextKeySigner.pubKey);
+		if (!latestEntry.nextKeyHashes.includes(currKeyHash))
+			throw new BadNextKeySpecifiedError();
+
+		const logEvent: LogEvent = {
+			id: latestEntry.id,
+			versionTime: new Date(Date.now()),
+			versionId: `${index}-${logHash}`,
+			updateKeys: [nextKeySigner.pubKey],
+			nextKeyHashes: nextKeyHashes,
+			method: "w3id:v0.0.0",
+		};
+
+		const proof = await signer.sign(canonicalize(logEvent) as string);
+		logEvent.proof = proof;
+
+		await this.repository.create(logEvent);
+		return logEvent;
+	}
+
+	private async createGenesisEntry(options: GenesisLogOptions) {
+		const { id, nextKeyHashes, signer } = options;
+		const logEvent: LogEvent = {
+			id,
+			versionId: `0-${id.split("@")[1]}`,
+			versionTime: new Date(Date.now()),
+			updateKeys: [signer.pubKey],
+			nextKeyHashes: nextKeyHashes,
+			method: "w3id:v0.0.0",
+		};
+		const proof = await signer.sign(canonicalize(logEvent) as string);
+		logEvent.proof = proof;
+		await this.repository.create(logEvent);
+		return logEvent;
+	}
+
+	async createLogEvent(options: CreateLogEventOptions) {
+		const entries = await this.repository.findMany({});
+		if (entries.length > 0)
+			return this.appendEntry(entries, options as RotationLogOptions);
+		return this.createGenesisEntry(options as GenesisLogOptions);
+	}
path: infrastructure/w3id/src/logs/log-manager.ts
user: login: sosweetham
body: if entries length is 0, and i happen to pass rotation log options instead of genesis log options, this should throw an error about it receiving unexpected options? 

i mean ofc, that would be a stupid thing to do by the consumer of this lib, but as a lib, i think that error might be good to have 
created_at: 2025-04-09T12:14:45Z
author_association: MEMBER
diff_hunk: @@ -0,0 +1,20 @@
+export function uint8ArrayToHex(bytes: Uint8Array): string {
+	return Array.from(bytes)
+		.map((b) => b.toString(16).padStart(2, "0"))
+		.join("");
+}
+
+export function hexToUint8Array(hex: string): Uint8Array {
+	if (hex.length % 2 !== 0) {
+		throw new Error("Hex string must have an even length");
+	}
+	const bytes = new Uint8Array(hex.length / 2);
+	for (let i = 0; i < hex.length; i += 2) {
+		bytes[i / 2] = Number.parseInt(hex.slice(i, i + 2), 16);
+	}
+	return bytes;
+}
+
+export function stringToUint8Array(str: string): Uint8Array {
+	return new TextEncoder().encode(str);
+}
path: infrastructure/w3id/src/utils/codec.ts
user: login: coderabbitai[bot]
body: _💡 Verification agent_

<details>
<summary>🧩 Analysis chain</summary>

**Consider adding unit tests for codec functions**

These encoding/decoding functions are critical for data integrity in cryptographic operations. Ensure they're thoroughly tested with various input cases including edge cases (empty strings, very long inputs, unicode characters, etc.).

---

🏁 Script executed:

```shell
#!/bin/bash
# Check if tests exist for the codec functions
echo "Searching for tests covering codec.ts..."
fd -t f "codec.*test" --exec cat {} \;
```

Length of output: 134

---



</details>

**Action Required: Add Comprehensive Unit Tests for Codec Functions**

The search for test files (e.g., files matching "codec.*test") did not return any results, indicating that no unit tests currently cover the functions in `infrastructure/w3id/src/utils/codec.ts`. Given that these encoding/decoding routines are critical for ensuring data integrity—especially in cryptographic contexts—it is essential to add detailed tests.

Please include tests that cover at least the following scenarios:
- **Standard Cases:** Validate the conversion functions with typical input values.
- **Edge Cases:** 
  - Validate behavior with empty input strings/arrays.
  - Test with very long inputs to ensure performance and correctness.
  - Include inputs with Unicode characters.
- **Error Conditions:** 
  - Confirm that `hexToUint8Array` correctly throws an error when provided with a hex string of odd length.

<!-- This is an auto-generated comment by CodeRabbit -->
created_at: 2025-04-09T12:42:34Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,9 @@
+export class MalformedIndexChainError extends Error {}
path: infrastructure/w3id/src/errors/errors.ts
user: login: dkraemerwork
body: Maybe it makes sense to atleast have the option to add a error key/message
created_at: 2025-04-09T15:11:59Z
author_association: NONE
diff_hunk: @@ -0,0 +1,148 @@
+import canonicalize from "canonicalize";
+import {
+	BadNextKeySpecifiedError,
+	BadOptionsSpecifiedError,
+	BadSignatureError,
+	MalformedHashChainError,
+	MalformedIndexChainError,
+} from "../errors/errors";
+import { isSubsetOf } from "../utils/array";
+import { hash } from "../utils/hash";
+import {
+	isGenesisOptions,
+	isRotationOptions,
+	type CreateLogEventOptions,
+	type GenesisLogOptions,
+	type LogEvent,
+	type RotationLogOptions,
+	type VerifierCallback,
+} from "./log.types";
+import type { StorageSpec } from "./storage/storage-spec";
+
+/**
+ * Class to generate historic event logs for all historic events for an Identifier
+ * starting with generating it's first log entry
+ */
+
+// TODO: Create a specification link inside our docs for how generation of identifier works
path: infrastructure/w3id/src/logs/log-manager.ts
user: login: dkraemerwork
body: I would remove the TODO and create an issue instead
created_at: 2025-04-09T15:12:37Z
author_association: NONE
diff_hunk: @@ -0,0 +1,148 @@
+import canonicalize from "canonicalize";
+import {
+	BadNextKeySpecifiedError,
+	BadOptionsSpecifiedError,
+	BadSignatureError,
+	MalformedHashChainError,
+	MalformedIndexChainError,
+} from "../errors/errors";
+import { isSubsetOf } from "../utils/array";
+import { hash } from "../utils/hash";
+import {
+	isGenesisOptions,
+	isRotationOptions,
+	type CreateLogEventOptions,
+	type GenesisLogOptions,
+	type LogEvent,
+	type RotationLogOptions,
+	type VerifierCallback,
+} from "./log.types";
+import type { StorageSpec } from "./storage/storage-spec";
+
+/**
+ * Class to generate historic event logs for all historic events for an Identifier
+ * starting with generating it's first log entry
+ */
+
+// TODO: Create a specification link inside our docs for how generation of identifier works
+
+export class IDLogManager {
+	repository: StorageSpec<LogEvent, LogEvent>;
+
+	constructor(repository: StorageSpec<LogEvent, LogEvent>) {
+		this.repository = repository;
+	}
+
+	static async validateLogChain(
+		log: LogEvent[],
+		verifyCallback: VerifierCallback,
+	) {
+		let currIndex = 0;
+		let currentNextKeyHashesSeen: string[] = [];
+		let lastUpdateKeysSeen: string[] = [];
+		let lastHash: string | null = null;
+
+		for (const e of log) {
+			const [_index, _hash] = e.versionId.split("-");
+			const index = Number(_index);
+			if (currIndex !== index) throw new MalformedIndexChainError();
+			const hashedUpdateKeys = await Promise.all(
+				e.updateKeys.map(async (k) => await hash(k)),
+			);
+			if (index > 0) {
+				const updateKeysSeen = isSubsetOf(
+					hashedUpdateKeys,
+					currentNextKeyHashesSeen,
+				);
+				if (!updateKeysSeen || lastHash !== _hash)
+					throw new MalformedHashChainError();
path: infrastructure/w3id/src/logs/log-manager.ts
user: login: dkraemerwork
body: If we add a message or error key we can add more details here. It makes it easier to debug in production
created_at: 2025-04-09T15:14:56Z
author_association: NONE
diff_hunk: @@ -0,0 +1,148 @@
+import canonicalize from "canonicalize";
+import {
+	BadNextKeySpecifiedError,
+	BadOptionsSpecifiedError,
+	BadSignatureError,
+	MalformedHashChainError,
+	MalformedIndexChainError,
+} from "../errors/errors";
+import { isSubsetOf } from "../utils/array";
+import { hash } from "../utils/hash";
+import {
+	isGenesisOptions,
+	isRotationOptions,
+	type CreateLogEventOptions,
+	type GenesisLogOptions,
+	type LogEvent,
+	type RotationLogOptions,
+	type VerifierCallback,
+} from "./log.types";
+import type { StorageSpec } from "./storage/storage-spec";
+
+/**
+ * Class to generate historic event logs for all historic events for an Identifier
+ * starting with generating it's first log entry
+ */
+
+// TODO: Create a specification link inside our docs for how generation of identifier works
+
+export class IDLogManager {
+	repository: StorageSpec<LogEvent, LogEvent>;
+
+	constructor(repository: StorageSpec<LogEvent, LogEvent>) {
+		this.repository = repository;
+	}
+
+	static async validateLogChain(
+		log: LogEvent[],
+		verifyCallback: VerifierCallback,
+	) {
+		let currIndex = 0;
+		let currentNextKeyHashesSeen: string[] = [];
+		let lastUpdateKeysSeen: string[] = [];
+		let lastHash: string | null = null;
+
+		for (const e of log) {
+			const [_index, _hash] = e.versionId.split("-");
+			const index = Number(_index);
+			if (currIndex !== index) throw new MalformedIndexChainError();
+			const hashedUpdateKeys = await Promise.all(
+				e.updateKeys.map(async (k) => await hash(k)),
+			);
+			if (index > 0) {
+				const updateKeysSeen = isSubsetOf(
+					hashedUpdateKeys,
+					currentNextKeyHashesSeen,
+				);
+				if (!updateKeysSeen || lastHash !== _hash)
+					throw new MalformedHashChainError();
+			}
+
+			currentNextKeyHashesSeen = e.nextKeyHashes;
+			await IDLogManager.verifyLogEventProof(
+				e,
+				lastUpdateKeysSeen.length > 0 ? lastUpdateKeysSeen : e.updateKeys,
+				verifyCallback,
+			);
+			lastUpdateKeysSeen = e.updateKeys;
+			currIndex++;
+			lastHash = await hash(canonicalize(e) as string);
+		}
+		return true;
+	}
+
+	private static async verifyLogEventProof(
+		e: LogEvent,
+		currentUpdateKeys: string[],
+		verifyCallback: VerifierCallback,
+	) {
+		const proof = e.proof;
+		const copy = JSON.parse(JSON.stringify(e));
+		// biome-ignore lint/performance/noDelete: we need to delete proof completely
+		delete copy.proof;
+		const canonicalJson = canonicalize(copy);
+		let verified = false;
+		if (!proof) throw new Error();
path: infrastructure/w3id/src/logs/log-manager.ts
user: login: dkraemerwork
body: lets throw a specific error too?
created_at: 2025-04-09T15:17:31Z
author_association: NONE
diff_hunk: @@ -0,0 +1,148 @@
+import canonicalize from "canonicalize";
+import {
+	BadNextKeySpecifiedError,
+	BadOptionsSpecifiedError,
+	BadSignatureError,
+	MalformedHashChainError,
+	MalformedIndexChainError,
+} from "../errors/errors";
+import { isSubsetOf } from "../utils/array";
+import { hash } from "../utils/hash";
+import {
+	isGenesisOptions,
+	isRotationOptions,
+	type CreateLogEventOptions,
+	type GenesisLogOptions,
+	type LogEvent,
+	type RotationLogOptions,
+	type VerifierCallback,
+} from "./log.types";
+import type { StorageSpec } from "./storage/storage-spec";
+
+/**
+ * Class to generate historic event logs for all historic events for an Identifier
+ * starting with generating it's first log entry
+ */
+
+// TODO: Create a specification link inside our docs for how generation of identifier works
+
+export class IDLogManager {
+	repository: StorageSpec<LogEvent, LogEvent>;
+
+	constructor(repository: StorageSpec<LogEvent, LogEvent>) {
+		this.repository = repository;
+	}
+
+	static async validateLogChain(
+		log: LogEvent[],
+		verifyCallback: VerifierCallback,
+	) {
+		let currIndex = 0;
+		let currentNextKeyHashesSeen: string[] = [];
+		let lastUpdateKeysSeen: string[] = [];
+		let lastHash: string | null = null;
+
+		for (const e of log) {
+			const [_index, _hash] = e.versionId.split("-");
+			const index = Number(_index);
+			if (currIndex !== index) throw new MalformedIndexChainError();
+			const hashedUpdateKeys = await Promise.all(
+				e.updateKeys.map(async (k) => await hash(k)),
+			);
+			if (index > 0) {
+				const updateKeysSeen = isSubsetOf(
+					hashedUpdateKeys,
+					currentNextKeyHashesSeen,
+				);
+				if (!updateKeysSeen || lastHash !== _hash)
+					throw new MalformedHashChainError();
+			}
+
+			currentNextKeyHashesSeen = e.nextKeyHashes;
+			await IDLogManager.verifyLogEventProof(
+				e,
+				lastUpdateKeysSeen.length > 0 ? lastUpdateKeysSeen : e.updateKeys,
+				verifyCallback,
+			);
+			lastUpdateKeysSeen = e.updateKeys;
+			currIndex++;
+			lastHash = await hash(canonicalize(e) as string);
+		}
+		return true;
+	}
+
+	private static async verifyLogEventProof(
+		e: LogEvent,
+		currentUpdateKeys: string[],
+		verifyCallback: VerifierCallback,
+	) {
+		const proof = e.proof;
+		const copy = JSON.parse(JSON.stringify(e));
+		// biome-ignore lint/performance/noDelete: we need to delete proof completely
+		delete copy.proof;
+		const canonicalJson = canonicalize(copy);
+		let verified = false;
+		if (!proof) throw new Error();
path: infrastructure/w3id/src/logs/log-manager.ts
user: login: sosweetham
body: fixed https://github.com/MetaState-Prototype-Project/prototype/pull/98/commits/d1de58a305e44bd6f3aadbb6e4639d20f82f4497 
created_at: 2025-04-09T15:36:59Z
author_association: MEMBER
diff_hunk: @@ -0,0 +1,148 @@
+import canonicalize from "canonicalize";
+import {
+	BadNextKeySpecifiedError,
+	BadOptionsSpecifiedError,
+	BadSignatureError,
+	MalformedHashChainError,
+	MalformedIndexChainError,
+} from "../errors/errors";
+import { isSubsetOf } from "../utils/array";
+import { hash } from "../utils/hash";
+import {
+	isGenesisOptions,
+	isRotationOptions,
+	type CreateLogEventOptions,
+	type GenesisLogOptions,
+	type LogEvent,
+	type RotationLogOptions,
+	type VerifierCallback,
+} from "./log.types";
+import type { StorageSpec } from "./storage/storage-spec";
+
+/**
+ * Class to generate historic event logs for all historic events for an Identifier
+ * starting with generating it's first log entry
+ */
+
+// TODO: Create a specification link inside our docs for how generation of identifier works
path: infrastructure/w3id/src/logs/log-manager.ts
user: login: sosweetham
body: concur @coodos, unless you had something else in mind 
created_at: 2025-04-09T15:38:10Z
author_association: MEMBER
diff_hunk: @@ -0,0 +1,9 @@
+export class MalformedIndexChainError extends Error {}
path: infrastructure/w3id/src/errors/errors.ts
user: login: sosweetham
body: think that it extends error so I should just be able to add it like normal, since it should be the same constructor 
created_at: 2025-04-09T15:42:22Z
author_association: MEMBER
diff_hunk: @@ -0,0 +1,148 @@
+import canonicalize from "canonicalize";
+import {
+	BadNextKeySpecifiedError,
+	BadOptionsSpecifiedError,
+	BadSignatureError,
+	MalformedHashChainError,
+	MalformedIndexChainError,
+} from "../errors/errors";
+import { isSubsetOf } from "../utils/array";
+import { hash } from "../utils/hash";
+import {
+	isGenesisOptions,
+	isRotationOptions,
+	type CreateLogEventOptions,
+	type GenesisLogOptions,
+	type LogEvent,
+	type RotationLogOptions,
+	type VerifierCallback,
+} from "./log.types";
+import type { StorageSpec } from "./storage/storage-spec";
+
+/**
+ * Class to generate historic event logs for all historic events for an Identifier
+ * starting with generating it's first log entry
+ */
+
+// TODO: Create a specification link inside our docs for how generation of identifier works
+
+export class IDLogManager {
+	repository: StorageSpec<LogEvent, LogEvent>;
+
+	constructor(repository: StorageSpec<LogEvent, LogEvent>) {
+		this.repository = repository;
+	}
+
+	static async validateLogChain(
+		log: LogEvent[],
+		verifyCallback: VerifierCallback,
+	) {
+		let currIndex = 0;
+		let currentNextKeyHashesSeen: string[] = [];
+		let lastUpdateKeysSeen: string[] = [];
+		let lastHash: string | null = null;
+
+		for (const e of log) {
+			const [_index, _hash] = e.versionId.split("-");
+			const index = Number(_index);
+			if (currIndex !== index) throw new MalformedIndexChainError();
+			const hashedUpdateKeys = await Promise.all(
+				e.updateKeys.map(async (k) => await hash(k)),
+			);
+			if (index > 0) {
+				const updateKeysSeen = isSubsetOf(
+					hashedUpdateKeys,
+					currentNextKeyHashesSeen,
+				);
+				if (!updateKeysSeen || lastHash !== _hash)
+					throw new MalformedHashChainError();
path: infrastructure/w3id/src/logs/log-manager.ts
user: login: sosweetham
body: might be vague on purpose, @coodos confirm pl, although i dont see much of a problem throwing out the key in the message cuz it's wrong anyways lol 
created_at: 2025-04-09T15:45:29Z
author_association: MEMBER
diff_hunk: @@ -0,0 +1,28 @@
+import canonicalize from "canonicalize";
+import { uint8ArrayToHex } from "./codec";
+
+export async function hash(
+  input: string | Record<string, unknown>,
+): Promise<string> {
+  let dataToHash: string;
+
+  if (typeof input === "string") {
+    dataToHash = input;
+  } else {
+    const canonical = canonicalize(input);
+    if (!canonical) {
+      throw new Error(
+        `Failed to canonicalize object: ${JSON.stringify(input).substring(0, 100)}...`,
+      );
+    }
+    dataToHash = canonical;
+  }
+
+  const buffer = new TextEncoder().encode(dataToHash);
+  const hashBuffer = await crypto.subtle.digest("SHA-256", buffer);
+  const hashHex = uint8ArrayToHex(
+    Array.from(new Uint8Array(hashBuffer)) as unknown as Uint8Array,
+  );
path: infrastructure/w3id/src/utils/hash.ts
user: login: coderabbitai[bot]
body: _🛠️ Refactor suggestion_

**Fix incorrect type assertion in hash computation.**

There's an unnecessary and potentially problematic type conversion happening when processing the hash buffer.


```diff
  const buffer = new TextEncoder().encode(dataToHash);
  const hashBuffer = await crypto.subtle.digest("SHA-256", buffer);
  const hashHex = uint8ArrayToHex(
-    Array.from(new Uint8Array(hashBuffer)) as unknown as Uint8Array,
+    new Uint8Array(hashBuffer),
  );
```

The current implementation converts the `Uint8Array` to a regular array with `Array.from()` and then incorrectly casts it back to `Uint8Array`. This could lead to runtime issues as the object would not have the expected Uint8Array methods and properties.


<!-- suggestion_start -->

<details>
<summary>📝 Committable suggestion</summary>

> ‼️ **IMPORTANT**
> Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

`````suggestion
  const buffer = new TextEncoder().encode(dataToHash);
  const hashBuffer = await crypto.subtle.digest("SHA-256", buffer);
  const hashHex = uint8ArrayToHex(
    new Uint8Array(hashBuffer),
  );
`````

</details>

<!-- suggestion_end -->

<!-- This is an auto-generated reply by CodeRabbit -->

✅ Addressed in commits 4f9ab12 to c9c6d5e

<!-- This is an auto-generated comment by CodeRabbit -->
created_at: 2025-04-09T15:55:09Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,28 @@
+import canonicalize from "canonicalize";
+import { uint8ArrayToHex } from "./codec";
+
+export async function hash(
+  input: string | Record<string, unknown>,
+): Promise<string> {
+  let dataToHash: string;
+
+  if (typeof input === "string") {
+    dataToHash = input;
+  } else {
+    const canonical = canonicalize(input);
+    if (!canonical) {
+      throw new Error(
+        `Failed to canonicalize object: ${JSON.stringify(input).substring(0, 100)}...`,
+      );
+    }
+    dataToHash = canonical;
+  }
+
+  const buffer = new TextEncoder().encode(dataToHash);
+  const hashBuffer = await crypto.subtle.digest("SHA-256", buffer);
+  const hashHex = uint8ArrayToHex(
+    Array.from(new Uint8Array(hashBuffer)) as unknown as Uint8Array,
+  );
path: infrastructure/w3id/src/utils/hash.ts
user: login: sosweetham
body: my brain is not braining 
created_at: 2025-04-09T15:57:09Z
author_association: MEMBER
diff_hunk: @@ -0,0 +1,28 @@
+import canonicalize from "canonicalize";
+import { uint8ArrayToHex } from "./codec";
+
+export async function hash(
+  input: string | Record<string, unknown>,
+): Promise<string> {
+  let dataToHash: string;
+
+  if (typeof input === "string") {
+    dataToHash = input;
+  } else {
+    const canonical = canonicalize(input);
+    if (!canonical) {
+      throw new Error(
+        `Failed to canonicalize object: ${JSON.stringify(input).substring(0, 100)}...`,
+      );
+    }
+    dataToHash = canonical;
+  }
+
+  const buffer = new TextEncoder().encode(dataToHash);
+  const hashBuffer = await crypto.subtle.digest("SHA-256", buffer);
+  const hashHex = uint8ArrayToHex(
+    Array.from(new Uint8Array(hashBuffer)) as unknown as Uint8Array,
+  );
path: infrastructure/w3id/src/utils/hash.ts
user: login: coderabbitai[bot]
body: @sosweetham No worries! Let me explain the issue in simpler terms:

The current code is doing something unnecessarily complicated:
1. Creating a Uint8Array from the hash buffer
2. Converting it to a regular array with `Array.from()`
3. Then trying to force it back to be a Uint8Array again with type assertions

It's like taking a specialized tool, converting it to a generic one, and then pretending it's still the specialized tool.

The suggested fix simply skips the unnecessary conversions and uses `new Uint8Array(hashBuffer)` directly, which is cleaner and avoids potential issues if the code later tries to use Uint8Array-specific features.

Would you like me to explain any other aspects of this code?

<!-- This is an auto-generated reply by CodeRabbit -->
created_at: 2025-04-09T15:57:28Z
author_association: CONTRIBUTOR

PR comments:
user: login: coderabbitai[bot]
created_at: 2025-04-09T12:39:57Z
body: <!-- This is an auto-generated comment: summarize by coderabbit.ai -->
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> Reviewing files that changed from the base of the PR and between 123fa494398362ca0eb90b94edda11b2657c1cf1 and c9c6d5e439444a49c045fdecc28678406d75d787.
> 
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> 
> <details>
> <summary>📒 Files selected for processing (2)</summary>
> 
> * `infrastructure/w3id/src/logs/log.types.ts` (1 hunks)
> * `infrastructure/w3id/src/utils/hash.ts` (1 hunks)
> 
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<!-- walkthrough_start -->

## Walkthrough
This pull request introduces several new features and utilities for the W3ID infrastructure. Three new dependencies are added to the package configuration. New error classes specifically for log chain and signature validations are implemented. The log management subsystem now includes an `IDLogManager` class with methods for creating genesis and rotation log entries, validating log chains, and handling log event creation. Additional TypeScript types, utility functions for arrays, encoding/decoding, and hashing are also added, along with comprehensive tests for log management functionality.

## Changes

| File(s) | Change Summary |
|---------|----------------|
| `infrastructure/w3id/package.json` | Added dependencies: `canonicalize@^2.1.0`, `multiformats@^13.3.2`, and `tweetnacl@^1.0.3`. |
| `infrastructure/w3id/src/errors/errors.ts` | Added five new error classes: `MalformedIndexChainError`, `MalformedHashChainError`, `BadSignatureError`, `BadNextKeySpecifiedError`, and `BadOptionsSpecifiedError`. |
| `infrastructure/w3id/src/logs/log-manager.ts` | Introduced `IDLogManager` class with methods: `validateLogChain`, `appendEntry`, `createGenesisEntry`, and `createLogEvent` for managing log events. |
| `infrastructure/w3id/src/logs/log.types.ts` | Added types and type guard functions for log events: `LogEvent`, `VerifierCallback`, `Signer`, `RotationLogOptions`, `GenesisLogOptions`, and `CreateLogEventOptions`. |
| `infrastructure/w3id/src/utils/array.ts` | Added the utility function `isSubsetOf` to determine if one array is a subset of another. |
| `infrastructure/w3id/src/utils/codec.ts` | Added utility functions `uint8ArrayToHex`, `hexToUint8Array`, and `stringToUint8Array` for data conversion. |
| `infrastructure/w3id/src/utils/hash.ts` | Introduced an asynchronous `hash` function to compute a SHA-256 hash from a string or an object, with canonicalization support. |
| `infrastructure/w3id/tests/logs/log.test.ts` | Added a new test suite for log management including an in-memory storage class, log event creation tests, signature verification via `verifierCallback`, and a helper `createSigner` function. |
| `infrastructure/w3id/tests/utils/codec.test.ts` | Added tests for utility functions: `uint8ArrayToHex`, `hexToUint8Array`, and `stringToUint8Array`. |

## Sequence Diagram(s)
```mermaid
sequenceDiagram
  participant C as Client/Application
  participant LM as IDLogManager
  participant VC as verifyCallback

  C->>LM: createLogEvent(options)
  alt Genesis Entry
    LM->>LM: createGenesisEntry(options)
  else Rotation Entry
    LM->>LM: appendEntry(entries, options)
  end
  LM->>VC: verify signature
  VC-->>LM: verification result
  LM->>C: Return log event
```

## Assessment against linked issues

| Objective                                                    | Addressed | Explanation                                              |
|--------------------------------------------------------------|-----------|----------------------------------------------------------|
| Pre-Rotation Key Setup (#18)                                 | ✅        |                                                          |
| Generate Rotation Log Entry (#19)                            | ✅        |                                                          |
| Data Integrity Proof for Rotation (#20)                      | ✅        |                                                          |
| Update DID Document for Rotation (#21)                       | ❌        | DID Document update logic is not present in these changes. |

## Poem
> I'm a rabbit hopping through the code,  
> New logs and errors light my abode. 🐇  
> Dependencies join the joyful race,  
> Signing entries with a gentle grace.  
> I nibble bugs, skip errors in my stride,  
> Celebrating changes with a boundless pride!

<!-- walkthrough_end -->
<!-- internal state start -->


<!-- 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IA6AbRYosUV0Bg+qgVGbMFoDIzJQaQUPtIokWiBkZDAJ0LMFmDTABAUcaYCQDdC+L4FtoF0GkEDRgzpgJiuYDEpdA6g3QJATxVIuKV0AxQXc0RaH2D6KKklDAQYLaF8V+KoA5C3AFQsrC0L5Q9CugBQsGi6KgAA= 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---



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<!-- tips_end -->
author_association: CONTRIBUTOR
user: login: nsergey82
created_at: 2025-04-19T11:08:25Z
body: Meta-question: not sure how you, folks, feel about necro-comments into merged PRs -- would you rather I opened an issue? 

And the actual question (not the only one): here you refer to "log" in the KERI sense, not in the sense assumed by Alex in design document, right? 
author_association: CONTRIBUTOR