Repository: ar-io/ar-io-node
Pull request #379: feat: introduce CompositeChunkSource and refactor chunk handling (PE-8012)
Author: login: hlolli
Created: 2025-04-25T16:58:38Z | Merged: 2025-04-30T17:34:24Z

- Create CompositeChunkSource to unify chunk data and metadata retrieval
- Replace separate chunkDataSource and chunkMetaDataSource with unified chunkSource in route handlers
- Refactor handler to work with composite Chunk objects (data + metadata)
- Remove redundant metadata fetch logic from chunk handler
- Introduce new Chunk interface that extends ChunkMetadata and ChunkData with optional tx_path
- Update S3ChunkSource to support rawResponsePayload mode using aws-lite
- Ensure chunk body is a Buffer and validate S3 responses defensively
- Add support for AWS_SESSION_TOKEN in config and awsClient setup
- Restructure system.ts to initialize chunkSource conditionally based on config
- Clean up imports and parameter lists in affected modules



Diff:
diff --git a/src/config.ts b/src/config.ts
index c41741caa..1a3931d14 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -727,6 +727,8 @@ export const AWS_ACCESS_KEY_ID = env.varOrUndefined('AWS_ACCESS_KEY_ID');
 export const AWS_SECRET_ACCESS_KEY = env.varOrUndefined(
   'AWS_SECRET_ACCESS_KEY',
 );
+// The session token is optional, but if it is set, it must be used
+export const AWS_SESSION_TOKEN = env.varOrUndefined('AWS_SESSION_TOKEN');
 export const AWS_REGION = env.varOrUndefined('AWS_REGION');
 export const AWS_ENDPOINT = env.varOrUndefined('AWS_ENDPOINT');
 
diff --git a/src/data/composite-chunk-source.ts b/src/data/composite-chunk-source.ts
new file mode 100644
index 000000000..7de21f7b7
--- /dev/null
+++ b/src/data/composite-chunk-source.ts
@@ -0,0 +1,58 @@
+/**
+ * AR.IO Gateway
+ * Copyright (C) 2022-2023 Permanent Data Solutions, Inc. All Rights Reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import {
+  ChunkMetadataByAnySource,
+  ChunkByAnySource,
+  ChunkDataByAnySource,
+  ChunkDataByAnySourceParams,
+  Chunk,
+} from '../types';
+
+export class CompositeChunkSource implements ChunkByAnySource {
+  private readonly chunkMetaDataSource: ChunkMetadataByAnySource;
+  private readonly chunkDataSource: ChunkDataByAnySource;
+
+  constructor(
+    chunkMetaDataSource: ChunkMetadataByAnySource,
+    chunkDataSource: ChunkDataByAnySource,
+  ) {
+    this.chunkMetaDataSource = chunkMetaDataSource;
+    this.chunkDataSource = chunkDataSource;
+  }
+
+  async getChunkByAny(params: ChunkDataByAnySourceParams): Promise<Chunk> {
+    const metadata =
+      await this.chunkMetaDataSource.getChunkMetadataByAny(params);
+
+    const chunkDataParams: ChunkDataByAnySourceParams = {
+      txSize: params.txSize,
+      absoluteOffset: params.absoluteOffset,
+      dataRoot: params.dataRoot,
+      relativeOffset: metadata.offset, // aligned offset
+    };
+
+    const data = await this.chunkDataSource.getChunkDataByAny(chunkDataParams);
+
+    return {
+      ...metadata,
+      ...data,
+      tx_path: undefined,
+    };
+  }
+}
diff --git a/src/data/read-through-chunk-metadata-cache.ts b/src/data/read-through-chunk-metadata-cache.ts
index 943bec487..12041850f 100644
--- a/src/data/read-through-chunk-metadata-cache.ts
+++ b/src/data/read-through-chunk-metadata-cache.ts
@@ -74,7 +74,10 @@ export class ReadThroughChunkMetadataCache implements ChunkMetadataByAnySource {
         // extracted value
 
         const chunkMetadata = {
-          data_root: chunk.tx_path.slice(-64, -32),
+          data_root:
+            chunk.tx_path === undefined
+              ? chunk.data_root
+              : chunk.tx_path.slice(-64, -32),
           data_size: chunk.chunk.length,
           offset: relativeOffset,
           data_path: chunk.data_path,
diff --git a/src/data/s3-chunk-source.ts b/src/data/s3-chunk-source.ts
index f3dbb94e0..1112c0e4d 100644
--- a/src/data/s3-chunk-source.ts
+++ b/src/data/s3-chunk-source.ts
@@ -61,6 +61,7 @@ export class S3ChunkSource implements ChunkDataByAnySource {
     const key = this.s3Prefix
       ? `${this.s3Prefix}/${dataRoot}/${relativeOffset}`
       : `${dataRoot}/${relativeOffset}`;
+
     this.log.debug('Fetching chunk from S3', {
       bucket: this.s3Bucket,
       key,
@@ -69,13 +70,16 @@ export class S3ChunkSource implements ChunkDataByAnySource {
     const response = await this.s3Client.GetObject({
       Bucket: this.s3Bucket,
       Key: key,
+      rawResponsePayload: true,
+      streamResponsePayload: false,
     });
 
-    if (!response.Body) {
+    if (!response.Body || !Buffer.isBuffer(response.Body)) {
       throw new Error(`Failed to fetch chunk data from S3: ${key}`);
     }
-    const chunk = Buffer.from(await response.Body.transformToByteArray());
 
+    // with rawResponsePayload: true, the Body is a Buffer
+    const chunk = response.Body as unknown as Buffer;
     const hash = crypto.createHash('sha256').update(chunk).digest();
 
     return {
diff --git a/src/routes/chunk/handlers.ts b/src/routes/chunk/handlers.ts
index eb670e8b8..a3cbf352b 100644
--- a/src/routes/chunk/handlers.ts
+++ b/src/routes/chunk/handlers.ts
@@ -28,23 +28,16 @@ import {
 } from '../../config.js';
 import { headerNames } from '../../constants.js';
 import { toB64Url } from '../../lib/encoding.js';
-import {
-  ChunkData,
-  ChunkDataByAnySource,
-  ChunkMetadata,
-  ChunkMetadataByAnySource,
-} from '../../types.js';
+import { Chunk, ChunkByAnySource } from '../../types.js';
 import { ArweaveCompositeClient } from '../../arweave/composite-client.js';
 import { Logger } from 'winston';
 
 export const createChunkOffsetHandler = ({
-  chunkDataSource,
-  chunkMetaDataSource,
+  chunkSource,
   db,
   log,
 }: {
-  chunkDataSource: ChunkDataByAnySource;
-  chunkMetaDataSource: ChunkMetadataByAnySource;
+  chunkSource: ChunkByAnySource;
   db: StandaloneSqliteDatabase;
   log: Logger;
 }) => {
@@ -78,11 +71,12 @@ export const createChunkOffsetHandler = ({
     const contiguousDataStartDelimiter = weaveOffset - data_size + 1;
     const relativeOffset = offset - contiguousDataStartDelimiter;
 
-    let chunkData: ChunkData | undefined = undefined;
+    // composite-chunk-source returns chunk metadata and chunk data
+    let chunk: Chunk | undefined = undefined;
 
     // actually fetch the chunk data
     try {
-      chunkData = await chunkDataSource.getChunkDataByAny({
+      chunk = await chunkSource.getChunkByAny({
         txSize: data_size,
         absoluteOffset: offset,
         dataRoot: data_root,
@@ -93,36 +87,28 @@ export const createChunkOffsetHandler = ({
       return;
     }
 
-    if (chunkData === undefined) {
+    if (chunk === undefined) {
       response.sendStatus(404);
       return;
     }
 
     let chunkBase64Url: string | undefined = undefined;
+    let dataPath: string | undefined = undefined;
+
     try {
-      chunkBase64Url = toB64Url(chunkData.chunk);
+      chunkBase64Url = toB64Url(chunk.chunk);
     } catch (error) {
       log.error('Error converting chunk to base64url', { error });
       response.status(500).send('Error converting chunk to base64url');
       return;
     }
 
-    let chunkMetadata: ChunkMetadata | undefined = undefined;
-    let dataPath: string | undefined = undefined;
-
     try {
-      chunkMetadata = await chunkMetaDataSource.getChunkMetadataByAny({
-        txSize: data_size,
-        absoluteOffset: offset,
-        dataRoot: data_root,
-        relativeOffset,
-      });
+      dataPath = toB64Url(chunk.data_path);
     } catch (error) {
-      log.error('Error fetching chunk metadata', { error });
-    }
-
-    if (chunkMetadata) {
-      dataPath = toB64Url(chunkMetadata.data_path);
+      log.error('Error getting data path from chunk', { error });
+      response.status(500).send('Error converting data path to base64url');
+      return;
     }
 
     // this is a very limited interface of the node network chunk response
diff --git a/src/routes/chunk/index.ts b/src/routes/chunk/index.ts
index 60779ee92..90c6f412c 100644
--- a/src/routes/chunk/index.ts
+++ b/src/routes/chunk/index.ts
@@ -22,12 +22,7 @@ import {
   createChunkPostHandler,
 } from './handlers.js';
 import log from '../../log.js';
-import {
-  arweaveClient,
-  chunkDataSource,
-  chunkMetaDataSource,
-  db,
-} from '../../system.js';
+import { arweaveClient, chunkSource, db } from '../../system.js';
 
 // To add a GET route for /chunk/:offset where :offset is restricted to a positive integer,
 // we can use a regular expression in your route path to constrain :offset.
@@ -42,8 +37,7 @@ chunkRouter.use(json({ limit: MAX_CHUNK_SIZE }));
 chunkRouter.get(
   CHUNK_OFFSET_PATH,
   createChunkOffsetHandler({
-    chunkDataSource,
-    chunkMetaDataSource,
+    chunkSource,
     db,
     log: log.child({ class: 'ChunkGetOffsetHandler' }),
   }),
diff --git a/src/system.ts b/src/system.ts
index d48195de4..4a149a830 100644
--- a/src/system.ts
+++ b/src/system.ts
@@ -96,6 +96,7 @@ import { server } from './app.js';
 import { S3DataStore } from './store/s3-data-store.js';
 import { BlockedNamesCache } from './blocked-names-cache.js';
 import { KvArNSRegistryStore } from './store/kv-arns-base-name-store.js';
+import { CompositeChunkSource } from './data/composite-chunk-source.js';
 
 process.on('uncaughtException', (error) => {
   metrics.uncaughtExceptionCounter.inc();
@@ -130,6 +131,9 @@ export const awsClient =
         secretAccessKey: config.AWS_SECRET_ACCESS_KEY,
         endpoint: config.AWS_ENDPOINT,
         region: config.AWS_REGION,
+        ...(config.AWS_SESSION_TOKEN !== undefined && {
+          sessionToken: config.AWS_SESSION_TOKEN,
+        }),
         plugins: [awsLiteS3],
       })
     : undefined;
@@ -395,7 +399,7 @@ if (config.CHUNK_DATA_SOURCE_TYPE === 'legacy-s3' && awsClient === undefined) {
 }
 
 // Configure contiguous data source
-export const chunkDataSource =
+const chunkDataSource =
   config.CHUNK_DATA_SOURCE_TYPE === 'legacy-s3'
     ? new S3ChunkSource({
         log,
@@ -411,6 +415,11 @@ export const chunkDataSource =
         chunkDataStore: new FsChunkDataStore({ log, baseDir: 'data/chunks' }),
       });
 
+export const chunkSource = new CompositeChunkSource(
+  chunkMetaDataSource,
+  chunkDataSource,
+);
+
 const txChunksDataSource = new TxChunksDataSource({
   log,
   chainSource: arweaveClient,
diff --git a/src/types.d.ts b/src/types.d.ts
index 729cebbc5..9fc010575 100644
--- a/src/types.d.ts
+++ b/src/types.d.ts
@@ -479,7 +479,7 @@ export interface ChunkMetadata {
 }
 
 export interface Chunk extends ChunkMetadata, ChunkData {
-  tx_path: Buffer;
+  tx_path: Buffer | undefined;
 }
 
 export interface ChunkDataByAnySourceParams {


Reviews:
user: login: coderabbitai[bot]
body: **Actionable comments posted: 0**

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

<details>
<summary>src/data/composite-chunk-source.ts (1)</summary><blockquote>

`63-68`: **Consider adding documentation for the empty tx_path buffer.**

The method returns a combined object with an empty `tx_path` buffer. It would be helpful to add a comment explaining why an empty buffer is used here.

```diff
 return {
   ...metadata,
   ...data,
+  // Empty tx_path is required by the Chunk interface but not used in this context
   tx_path: Buffer.from(''),
 };
```

</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 0b67589922e6b24cf1bfe314786343f89e36847c and 0ef0f200c8366ce3f8b0dcccfe3046b2227ba3d6.

</details>

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

* `src/data/composite-chunk-source.ts` (1 hunks)
* `src/system.ts` (2 hunks)

</details>

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

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

<details>
<summary>src/data/composite-chunk-source.ts (2)</summary><blockquote>

<details>
<summary>src/types.d.ts (4)</summary>

* `ChunkDataByAnySource` (502-504)
* `ChunkMetadataByAnySource` (496-500)
* `ChunkDataByAnySourceParams` (485-490)
* `Chunk` (481-483)

</details>
<details>
<summary>src/system.ts (2)</summary>

* `chunkMetaDataSource` (371-381)
* `chunkDataSource` (399-413)

</details>

</blockquote></details>

</details>

</details>

<details>
<summary>⏰ Context from checks skipped due to timeout of 90000ms (1)</summary>

* GitHub Check: test (ubuntu-latest)

</details>

<details>
<summary>🔇 Additional comments (9)</summary><blockquote>

<details>
<summary>src/data/composite-chunk-source.ts (6)</summary>

`1-17`: **Appropriate license header in place.**

The file includes the proper AGPL license header which is consistent with the project's license.

---

`19-24`: **Clean imports that follow the interface-driven design approach.**

Imports are well-organized and focused only on the required interfaces and types.

---

`26-36`: **Well-structured class design with proper implementation of the interface.**

The `CompositeChunkSource` class properly implements the `ChunkDataByAnySource` interface and has a clean constructor that takes both required sources. The private fields ensure the source dependencies are encapsulated.

---

`38-46`: **Good error handling when fetching metadata.**

The implementation correctly validates the metadata response and throws a meaningful error with context when it's invalid.

---

`48-54`: **Proper parameter construction for chunk data retrieval.**

The code correctly constructs a new parameter object using the retrieved metadata's aligned offset while preserving other necessary values from the original parameters.

---

`55-61`: **Good error handling when fetching chunk data.**

Similar to the metadata validation, the code properly checks for and handles invalid chunk data responses.

</details>
<details>
<summary>src/system.ts (3)</summary>

`99-99`: **Clean import of the new CompositeChunkSource.**

The import statement is correctly placed with the other data source imports.

---

`415-418`: **Well-configured composite chunk source.**

The implementation creates a new instance of `CompositeChunkSource` with the correct dependencies, combining the existing metadata and data sources.

---

`423-423`: **Proper integration with the existing system.**

The `txChunksDataSource` is correctly updated to use the new composite source instead of directly using the chunk data source. This change ensures that the system will now fetch metadata first and then use that information to retrieve the actual chunk data.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-04-25T17:01:22Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 1**

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

<details>
<summary>src/data/s3-chunk-source.ts (1)</summary><blockquote>

`77-83`: **Enhanced error detection for S3 responses.**

This is a good addition that properly detects error responses from S3 (which are returned as XML). However, the error message construction can be improved.


```diff
- throw new Error(
-   `Error detected in S3 response for key: ${key}. ${response.Body && response.Body.toString()}`,
- );
+ throw new Error(
+   `Error detected in S3 response for key: ${key}. ${response.Body?.toString()}`,
+ );
```

<details>
<summary>🧰 Tools</summary>

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

[error] 81-81: Change to an optional chain.

Unsafe fix: Change to an optional chain.


(lint/complexity/useOptionalChain)

</details>

</details>

</blockquote></details>
<details>
<summary>src/routes/chunk/handlers.ts (1)</summary><blockquote>

`117-140`: **Comprehensive handling of legacy and composite chunk data.**

The implementation correctly handles both composite chunk sources and legacy sources, with appropriate fallbacks and error handling. However, the code could be refactored for better readability.


Consider extracting the metadata handling logic into a helper function to improve readability:

```diff
-const legacyChunkData = chunkData as ChunkData & ChunkMetadata;
-
-if (legacyChunkData.data_path !== undefined) {
-  try {
-    chunkMetadata = await chunkMetaDataSource.getChunkMetadataByAny({
-      txSize: data_size,
-      absoluteOffset: offset,
-      dataRoot: data_root,
-      relativeOffset,
-    });
-  } catch (error) {
-    log.error('Error fetching chunk metadata', { error });
-  }
-
-  if (chunkMetadata) {
-    dataPath = toB64Url(chunkMetadata.data_path);
-  }
-} else {
-  dataPath = toB64Url(legacyChunkData.data_path);
-  txPath =
-    legacyChunkData.tx_path !== undefined
-      ? toB64Url(legacyChunkData.tx_path)
-      : undefined;
-}
+const legacyChunkData = chunkData as ChunkData & ChunkMetadata;
+
+// Process metadata based on whether it's embedded or needs to be fetched
+async function processChunkMetadata() {
+  if (legacyChunkData.data_path !== undefined) {
+    try {
+      chunkMetadata = await chunkMetaDataSource.getChunkMetadataByAny({
+        txSize: data_size,
+        absoluteOffset: offset,
+        dataRoot: data_root,
+        relativeOffset,
+      });
+      
+      if (chunkMetadata) {
+        dataPath = toB64Url(chunkMetadata.data_path);
+      }
+    } catch (error) {
+      log.error('Error fetching chunk metadata', { error });
+    }
+  } else {
+    dataPath = toB64Url(legacyChunkData.data_path);
+    txPath = legacyChunkData.tx_path !== undefined
+      ? toB64Url(legacyChunkData.tx_path)
+      : undefined;
+  }
+}
+
+await processChunkMetadata();
```

</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 afbbdcb8866fb8d520c24c61087fd48c048f640e and 0650149a5bf27f7b0dbd5610e38806c26005230d.

</details>

<details>
<summary>📒 Files selected for processing (7)</summary>

* `src/config.ts` (1 hunks)
* `src/data/composite-chunk-source.ts` (1 hunks)
* `src/data/s3-chunk-source.ts` (2 hunks)
* `src/routes/chunk/handlers.ts` (4 hunks)
* `src/routes/chunk/index.ts` (1 hunks)
* `src/system.ts` (4 hunks)
* `src/types.d.ts` (1 hunks)

</details>

<details>
<summary>✅ Files skipped from review due to trivial changes (2)</summary>

* src/routes/chunk/index.ts
* src/types.d.ts

</details>

<details>
<summary>🚧 Files skipped from review as they are similar to previous changes (2)</summary>

* src/data/composite-chunk-source.ts
* src/system.ts

</details>

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

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

<details>
<summary>src/routes/chunk/handlers.ts (3)</summary><blockquote>

<details>
<summary>src/types.d.ts (2)</summary>

* `ChunkData` (467-470)
* `ChunkMetadata` (472-481)

</details>
<details>
<summary>src/system.ts (1)</summary>

* `chunkMetaDataSource` (374-384)

</details>
<details>
<summary>src/lib/encoding.ts (1)</summary>

* `toB64Url` (40-42)

</details>

</blockquote></details>

</details><details>
<summary>🪛 GitHub Actions: build-core</summary>

<details>
<summary>src/routes/chunk/handlers.ts</summary>

[error] 24-24: TypeScript error TS6133: 'CHUNK_METADATA_SOURCE_TYPE' is declared but its value is never read.

</details>

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

<details>
<summary>src/data/s3-chunk-source.ts</summary>

[error] 81-81: Change to an optional chain.

Unsafe fix: Change to an optional chain.


(lint/complexity/useOptionalChain)

</details>

</details>

</details>

<details>
<summary>🔇 Additional comments (6)</summary><blockquote>

<details>
<summary>src/config.ts (1)</summary>

`730-731`: **LGTM: Good addition of AWS session token support.**

The addition of AWS_SESSION_TOKEN support is well-implemented and properly documented. This enables the use of temporary AWS credentials through STS (Security Token Service), which requires a session token alongside the access key ID and secret access key.

</details>
<details>
<summary>src/data/s3-chunk-source.ts (3)</summary>

`73-75`: **Good improvement on S3 response handling.**

Setting `rawResponsePayload: true` and `streamResponsePayload: false` ensures the S3 response body is returned as a raw buffer, which simplifies downstream processing.

---

`85-87`: **Improved response validation.**

The addition of `Buffer.isBuffer(response.Body)` check ensures the response is properly formatted before processing, enhancing robustness.

---

`89-91`: **Simplified buffer handling.**

The direct casting of `response.Body` to `Buffer` simplifies the code while maintaining type safety, which works properly with the `rawResponsePayload: true` setting.

</details>
<details>
<summary>src/routes/chunk/handlers.ts (2)</summary>

`82-84`: **Good type enhancement for composite chunks.**

The updated type definition properly accommodates both simple ChunkData objects and composite objects that combine chunk data with metadata, supporting the new CompositeChunkSource functionality.

---

`148-150`: **Proper inclusion of optional tx_path in response.**

The response JSON now correctly includes the tx_path field when available, maintaining consistency with the composite chunk data structure.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-04-28T13:28:32Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 0**

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

<details>
<summary>src/data/s3-chunk-source.ts (1)</summary><blockquote>

`77-83`: **Enhanced error detection for S3 responses.**

The added error detection for XML responses is a good improvement as S3 error responses are always in XML format while chunk data never is. This makes error handling more robust and provides clearer error messages.

Consider using optional chaining for better safety:

```diff
- `Error detected in S3 response for key: ${key}. ${response.Body && response.Body.toString()}`,
+ `Error detected in S3 response for key: ${key}. ${response.Body?.toString() || ''}`,
```

<details>
<summary>🧰 Tools</summary>

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

[error] 81-81: Change to an optional chain.

Unsafe fix: Change to an optional chain.


(lint/complexity/useOptionalChain)

</details>

</details>

</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 0650149a5bf27f7b0dbd5610e38806c26005230d and c38854c023c1ba976d305e500c06c44e729ab848.

</details>

<details>
<summary>📒 Files selected for processing (7)</summary>

* `src/config.ts` (1 hunks)
* `src/data/composite-chunk-source.ts` (1 hunks)
* `src/data/s3-chunk-source.ts` (2 hunks)
* `src/routes/chunk/handlers.ts` (3 hunks)
* `src/routes/chunk/index.ts` (1 hunks)
* `src/system.ts` (4 hunks)
* `src/types.d.ts` (1 hunks)

</details>

<details>
<summary>✅ Files skipped from review due to trivial changes (1)</summary>

* src/routes/chunk/index.ts

</details>

<details>
<summary>🚧 Files skipped from review as they are similar to previous changes (5)</summary>

* src/types.d.ts
* src/config.ts
* src/data/composite-chunk-source.ts
* src/routes/chunk/handlers.ts
* src/system.ts

</details>

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

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

<details>
<summary>src/data/s3-chunk-source.ts</summary>

[error] 81-81: Change to an optional chain.

Unsafe fix: Change to an optional chain.


(lint/complexity/useOptionalChain)

</details>

</details>

</details>

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

<details>
<summary>src/data/s3-chunk-source.ts (3)</summary>

`73-74`: **Improved S3 response handling with explicit payload format.**

Setting `rawResponsePayload: true` and `streamResponsePayload: false` ensures consistent handling of S3 responses as raw buffers, which aligns with how the data is processed in the rest of the function. This explicit configuration prevents potential format mismatches and simplifies the downstream code.

---

`85-85`: **Improved type safety check for response body.**

The enhanced validation now not only checks for the existence of `response.Body` but also verifies it's a Buffer using `Buffer.isBuffer()`, which is a good defensive programming practice to ensure the response is in the expected format before processing.

---

`89-90`: **Simplified buffer handling with helpful comment.**

The added comment clarifies the expected type of `response.Body` with the new configuration parameters, and the direct casting simplifies the code compared to potentially more complex transformation methods.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-04-28T14:00:45Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 0**

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

<details>
<summary>src/data/s3-chunk-source.ts (1)</summary><blockquote>

`77-83`: **Excellent error detection improvement.**

The added error detection for XML responses is important as AWS S3 returns error responses in XML format. This will make troubleshooting much easier by capturing the actual error message from the S3 service.


Consider using optional chaining for better readability:

```diff
- `Error detected in S3 response for key: ${key}. ${response.Body && response.Body.toString()}`,
+ `Error detected in S3 response for key: ${key}. ${response.Body?.toString()}`,
```

<details>
<summary>🧰 Tools</summary>

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

[error] 81-81: Change to an optional chain.

Unsafe fix: Change to an optional chain.


(lint/complexity/useOptionalChain)

</details>

</details>

</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 0650149a5bf27f7b0dbd5610e38806c26005230d and c38854c023c1ba976d305e500c06c44e729ab848.

</details>

<details>
<summary>📒 Files selected for processing (7)</summary>

* `src/config.ts` (1 hunks)
* `src/data/composite-chunk-source.ts` (1 hunks)
* `src/data/s3-chunk-source.ts` (2 hunks)
* `src/routes/chunk/handlers.ts` (3 hunks)
* `src/routes/chunk/index.ts` (1 hunks)
* `src/system.ts` (4 hunks)
* `src/types.d.ts` (1 hunks)

</details>

<details>
<summary>✅ Files skipped from review due to trivial changes (1)</summary>

* src/routes/chunk/index.ts

</details>

<details>
<summary>🚧 Files skipped from review as they are similar to previous changes (5)</summary>

* src/config.ts
* src/types.d.ts
* src/routes/chunk/handlers.ts
* src/data/composite-chunk-source.ts
* src/system.ts

</details>

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

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

<details>
<summary>src/data/s3-chunk-source.ts</summary>

[error] 81-81: Change to an optional chain.

Unsafe fix: Change to an optional chain.


(lint/complexity/useOptionalChain)

</details>

</details>

</details>

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

<details>
<summary>src/data/s3-chunk-source.ts (3)</summary>

`73-75`: **Good improvement to S3 response handling.**

The explicit parameters `rawResponsePayload: true` and `streamResponsePayload: false` ensure that the response body is returned as a raw buffer rather than a stream, which is important for reliable chunk data processing.

---

`85-87`: **Enhanced response validation.**

Adding the `Buffer.isBuffer(response.Body)` check is a good defensive programming practice. It ensures the response is not only present but also in the expected format before processing.

---

`89-91`: **Clear code with improved type handling.**

The comment explains the expected response type, and the direct casting to Buffer simplifies the code compared to using a transformation function. This makes the code more maintainable.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-04-28T14:02:20Z
user: login: djwhitt
state: COMMENTED
author_association: COLLABORATOR
submitted_at: 2025-04-29T17:04:02Z
user: login: djwhitt
state: COMMENTED
author_association: COLLABORATOR
submitted_at: 2025-04-29T17:19:50Z
user: login: djwhitt
state: COMMENTED
author_association: COLLABORATOR
submitted_at: 2025-04-29T17:20:11Z
user: login: djwhitt
state: COMMENTED
author_association: COLLABORATOR
submitted_at: 2025-04-29T17:21:23Z
user: login: hlolli
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-04-30T12:53:16Z
user: login: hlolli
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-04-30T13:13:44Z
user: login: hlolli
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-04-30T13:15:08Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 1**

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

<details>
<summary>src/routes/chunk/handlers.ts (1)</summary><blockquote>

`113-122`: **Consider including tx_path in the response**

Based on the Chunk interface (which now includes tx_path), consider including the tx_path in the response JSON when it's available to fully leverage the new composite chunk structure.


```diff
  response.status(200).json({
    chunk: chunkBase64Url,
    ...(dataPath !== undefined && {
      data_path: dataPath,
    }),
+   ...(chunk.tx_path !== undefined && {
+     tx_path: toB64Url(chunk.tx_path),
+   }),
    // as of today, ar-io-node doesn't pack chunks
    packing: 'unpacked',
  });
```

</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 c38854c023c1ba976d305e500c06c44e729ab848 and 86b79bcf2b1db6a67a87f113f31287591d6d3af9.

</details>

<details>
<summary>📒 Files selected for processing (7)</summary>

* `src/config.ts` (1 hunks)
* `src/data/composite-chunk-source.ts` (1 hunks)
* `src/data/s3-chunk-source.ts` (2 hunks)
* `src/routes/chunk/handlers.ts` (3 hunks)
* `src/routes/chunk/index.ts` (2 hunks)
* `src/system.ts` (4 hunks)
* `src/types.d.ts` (1 hunks)

</details>

<details>
<summary>✅ Files skipped from review due to trivial changes (1)</summary>

* src/routes/chunk/index.ts

</details>

<details>
<summary>🚧 Files skipped from review as they are similar to previous changes (5)</summary>

* src/types.d.ts
* src/config.ts
* src/data/s3-chunk-source.ts
* src/system.ts
* src/data/composite-chunk-source.ts

</details>

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

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

<details>
<summary>src/routes/chunk/handlers.ts (3)</summary><blockquote>

<details>
<summary>src/types.d.ts (2)</summary>

* `ChunkByAnySource` (492-494)
* `Chunk` (481-483)

</details>
<details>
<summary>src/system.ts (1)</summary>

* `chunkSource` (418-421)

</details>
<details>
<summary>src/lib/encoding.ts (1)</summary>

* `toB64Url` (40-42)

</details>

</blockquote></details>

</details>

</details>

<details>
<summary>🔇 Additional comments (2)</summary><blockquote>

<details>
<summary>src/routes/chunk/handlers.ts (2)</summary>

`31-43`: **LGTM: Properly integrates CompositeChunkSource**

The refactoring to use a single ChunkByAnySource interface simplifies the handler's dependencies and aligns with the PR's objective of using the new CompositeChunkSource.

---

`74-93`: **LGTM: Updated chunk retrieval logic**

The chunk retrieval logic has been updated to use the new composite source, which returns both chunk data and metadata in a single call. This simplifies error handling and reduces the need for multiple API calls.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-04-30T13:20:22Z
user: login: hlolli
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-04-30T13:50:55Z
user: login: coderabbitai[bot]
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-04-30T13:51:23Z
user: login: djwhitt
body: Nice! Looks good. Merging.

state: COMMENTED
author_association: COLLABORATOR
submitted_at: 2025-04-30T17:33:54Z
user: login: djwhitt
state: APPROVED
author_association: COLLABORATOR
submitted_at: 2025-04-30T17:34:14Z

Review comments:
diff_hunk: @@ -21,6 +21,7 @@ import { default as asyncHandler } from 'express-async-handler';
 import * as metrics from '../../metrics.js';
 import { StandaloneSqliteDatabase } from '../../database/standalone-sqlite.js';
 import {
+  CHUNK_METADATA_SOURCE_TYPE,
path: src/routes/chunk/handlers.ts
user: login: coderabbitai[bot]
body: _⚠️ Potential issue_

**Remove unused import.**

`CHUNK_METADATA_SOURCE_TYPE` is imported but never used in this file, causing a TypeScript error in the pipeline.


```diff
import {
-  CHUNK_METADATA_SOURCE_TYPE,
  CHUNK_POST_URLS,
  CHUNK_POST_ABORT_TIMEOUT_MS,
  CHUNK_POST_RESPONSE_TIMEOUT_MS,
  CHUNK_POST_MIN_SUCCESS_COUNT,
} from '../../config.js';
```


<!-- 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
import {
  CHUNK_POST_URLS,
  CHUNK_POST_ABORT_TIMEOUT_MS,
  CHUNK_POST_RESPONSE_TIMEOUT_MS,
  CHUNK_POST_MIN_SUCCESS_COUNT,
} from '../../config.js';
`````

</details>

<!-- suggestion_end -->

<details>
<summary>🧰 Tools</summary>

<details>
<summary>🪛 GitHub Actions: build-core</summary>

[error] 24-24: TypeScript error TS6133: 'CHUNK_METADATA_SOURCE_TYPE' is declared but its value is never read.

</details>

</details>

<!-- This is an auto-generated comment by CodeRabbit -->
created_at: 2025-04-28T13:28:31Z
author_association: CONTRIBUTOR
diff_hunk: @@ -476,6 +476,8 @@ export interface ChunkMetadata {
   data_path: Buffer;
   offset: number;
   hash: Buffer;
+  // legacy psql chunk metadata
+  tx_path?: Buffer;
path: src/types.d.ts
user: login: djwhitt
body: Why add this? We don't store `tx_path` in the legacy DB.
created_at: 2025-04-29T16:42:45Z
author_association: COLLABORATOR
diff_hunk: @@ -0,0 +1,68 @@
+/**
+ * AR.IO Gateway
+ * Copyright (C) 2022-2023 Permanent Data Solutions, Inc. All Rights Reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import {
+  ChunkMetadataByAnySource,
+  ChunkDataByAnySource,
+  ChunkDataByAnySourceParams,
+  Chunk,
+} from '../types';
+
+export class CompositeChunkSource implements ChunkDataByAnySource {
+  private readonly chunkMetaDataSource: ChunkMetadataByAnySource;
+  private readonly chunkDataSource: ChunkDataByAnySource;
+
+  constructor(
+    chunkMetaDataSource: ChunkMetadataByAnySource,
+    chunkDataSource: ChunkDataByAnySource,
+  ) {
+    this.chunkMetaDataSource = chunkMetaDataSource;
+    this.chunkDataSource = chunkDataSource;
+  }
+
+  async getChunkDataByAny(params: ChunkDataByAnySourceParams): Promise<Chunk> {
+    const metadata =
+      await this.chunkMetaDataSource.getChunkMetadataByAny(params);
+
+    if (metadata == null || typeof metadata !== 'object') {
path: src/data/composite-chunk-source.ts
user: login: djwhitt
body: Why is the object check needed? Do we have a reason to distrust the types here?
created_at: 2025-04-29T16:43:53Z
author_association: COLLABORATOR
diff_hunk: @@ -0,0 +1,68 @@
+/**
+ * AR.IO Gateway
+ * Copyright (C) 2022-2023 Permanent Data Solutions, Inc. All Rights Reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import {
+  ChunkMetadataByAnySource,
+  ChunkDataByAnySource,
+  ChunkDataByAnySourceParams,
+  Chunk,
+} from '../types';
+
+export class CompositeChunkSource implements ChunkDataByAnySource {
+  private readonly chunkMetaDataSource: ChunkMetadataByAnySource;
+  private readonly chunkDataSource: ChunkDataByAnySource;
+
+  constructor(
+    chunkMetaDataSource: ChunkMetadataByAnySource,
+    chunkDataSource: ChunkDataByAnySource,
+  ) {
+    this.chunkMetaDataSource = chunkMetaDataSource;
+    this.chunkDataSource = chunkDataSource;
+  }
+
+  async getChunkDataByAny(params: ChunkDataByAnySourceParams): Promise<Chunk> {
+    const metadata =
+      await this.chunkMetaDataSource.getChunkMetadataByAny(params);
+
+    if (metadata == null || typeof metadata !== 'object') {
+      throw new Error(
+        `Invalid metadata returned for: ${JSON.stringify(params)}`,
+      );
+    }
+    const chunkDataParams: ChunkDataByAnySourceParams = {
+      txSize: params.txSize,
+      absoluteOffset: params.absoluteOffset,
+      dataRoot: params.dataRoot,
+      relativeOffset: metadata.offset, // aligned offset
path: src/data/composite-chunk-source.ts
user: login: djwhitt
body: Appreciate the clarifying comment. :slightly_smiling_face: 
created_at: 2025-04-29T16:44:41Z
author_association: COLLABORATOR
diff_hunk: @@ -0,0 +1,68 @@
+/**
+ * AR.IO Gateway
+ * Copyright (C) 2022-2023 Permanent Data Solutions, Inc. All Rights Reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import {
+  ChunkMetadataByAnySource,
+  ChunkDataByAnySource,
+  ChunkDataByAnySourceParams,
+  Chunk,
+} from '../types';
+
+export class CompositeChunkSource implements ChunkDataByAnySource {
+  private readonly chunkMetaDataSource: ChunkMetadataByAnySource;
+  private readonly chunkDataSource: ChunkDataByAnySource;
+
+  constructor(
+    chunkMetaDataSource: ChunkMetadataByAnySource,
+    chunkDataSource: ChunkDataByAnySource,
+  ) {
+    this.chunkMetaDataSource = chunkMetaDataSource;
+    this.chunkDataSource = chunkDataSource;
+  }
+
+  async getChunkDataByAny(params: ChunkDataByAnySourceParams): Promise<Chunk> {
+    const metadata =
+      await this.chunkMetaDataSource.getChunkMetadataByAny(params);
+
+    if (metadata == null || typeof metadata !== 'object') {
+      throw new Error(
+        `Invalid metadata returned for: ${JSON.stringify(params)}`,
+      );
+    }
+    const chunkDataParams: ChunkDataByAnySourceParams = {
+      txSize: params.txSize,
+      absoluteOffset: params.absoluteOffset,
+      dataRoot: params.dataRoot,
+      relativeOffset: metadata.offset, // aligned offset
+    };
+
+    const data = await this.chunkDataSource.getChunkDataByAny(chunkDataParams);
+
+    if (data == null || typeof data !== 'object') {
path: src/data/composite-chunk-source.ts
user: login: djwhitt
body: Why is the object check needed? Do we have a reason to distrust the types here?
created_at: 2025-04-29T16:45:03Z
author_association: COLLABORATOR
diff_hunk: @@ -69,13 +70,24 @@ export class S3ChunkSource implements ChunkDataByAnySource {
     const response = await this.s3Client.GetObject({
       Bucket: this.s3Bucket,
       Key: key,
+      rawResponsePayload: true,
+      streamResponsePayload: false,
     });
 
-    if (!response.Body) {
+    // Error responses aren't easily detected with aws-lite, they always come in xml format
path: src/data/s3-chunk-source.ts
user: login: djwhitt
body: Is this true even with the latest versions of aws-lite? We could update the dependency if it simplifies the code.
created_at: 2025-04-29T16:46:27Z
author_association: COLLABORATOR
diff_hunk: @@ -109,20 +111,31 @@ export const createChunkOffsetHandler = ({
 
     let chunkMetadata: ChunkMetadata | undefined = undefined;
     let dataPath: string | undefined = undefined;
+    let txPath: string | undefined = undefined;
+
+    const legacyChunkData = chunkData as ChunkData & ChunkMetadata;
+
+    if (legacyChunkData.data_path !== undefined) {
+      try {
+        chunkMetadata = await chunkMetaDataSource.getChunkMetadataByAny({
path: src/routes/chunk/handlers.ts
user: login: djwhitt
body: There was a typo in the ticket description (now corrected). The intent was to update this route to use the new composite data source instantiated in `system.ts`.
created_at: 2025-04-29T16:51:19Z
author_association: COLLABORATOR
diff_hunk: @@ -395,7 +399,7 @@ if (config.CHUNK_DATA_SOURCE_TYPE === 'legacy-s3' && awsClient === undefined) {
 }
 
 // Configure contiguous data source
-export const chunkDataSource =
+const basicChunkDataSource =
path: src/system.ts
user: login: djwhitt
body: There was a typo in the ticket that most likely mislead you on the name. My intent was to keep this name the same and call the composite source `chunkSource` to follow the naming pattern on the types.
created_at: 2025-04-29T16:57:58Z
author_association: COLLABORATOR
diff_hunk: @@ -411,6 +415,12 @@ export const chunkDataSource =
         chunkDataStore: new FsChunkDataStore({ log, baseDir: 'data/chunks' }),
       });
 
+export const chunkDataSource =
path: src/system.ts
user: login: djwhitt
body: There was a typo in the ticket that most likely mislead you on the name. My intent was to calls this `chunkSource`.
created_at: 2025-04-29T16:59:13Z
author_association: COLLABORATOR
diff_hunk: @@ -411,6 +415,12 @@ export const chunkDataSource =
         chunkDataStore: new FsChunkDataStore({ log, baseDir: 'data/chunks' }),
       });
 
+export const chunkDataSource =
+  config.CHUNK_DATA_SOURCE_TYPE === 'legacy-s3' &&
path: src/system.ts
user: login: djwhitt
body: Coupling this to the legacy implementations is unnecessarily restrictive. The `CompositeChunkSource` should be instantiated as long as `chunkMetaDataSource` and `chunkDataSource` are defined.
created_at: 2025-04-29T17:02:18Z
author_association: COLLABORATOR
diff_hunk: @@ -0,0 +1,68 @@
+/**
+ * AR.IO Gateway
+ * Copyright (C) 2022-2023 Permanent Data Solutions, Inc. All Rights Reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import {
+  ChunkMetadataByAnySource,
+  ChunkDataByAnySource,
+  ChunkDataByAnySourceParams,
+  Chunk,
+} from '../types';
+
+export class CompositeChunkSource implements ChunkDataByAnySource {
path: src/data/composite-chunk-source.ts
user: login: djwhitt
body: This should be a `ChunkByAnySource` as opposed to a `ChunkDataByAnySource`.
created_at: 2025-04-29T17:19:50Z
author_association: COLLABORATOR
diff_hunk: @@ -0,0 +1,68 @@
+/**
+ * AR.IO Gateway
+ * Copyright (C) 2022-2023 Permanent Data Solutions, Inc. All Rights Reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import {
+  ChunkMetadataByAnySource,
+  ChunkDataByAnySource,
+  ChunkDataByAnySourceParams,
+  Chunk,
+} from '../types';
+
+export class CompositeChunkSource implements ChunkDataByAnySource {
+  private readonly chunkMetaDataSource: ChunkMetadataByAnySource;
+  private readonly chunkDataSource: ChunkDataByAnySource;
+
+  constructor(
+    chunkMetaDataSource: ChunkMetadataByAnySource,
+    chunkDataSource: ChunkDataByAnySource,
+  ) {
+    this.chunkMetaDataSource = chunkMetaDataSource;
+    this.chunkDataSource = chunkDataSource;
+  }
+
+  async getChunkDataByAny(params: ChunkDataByAnySourceParams): Promise<Chunk> {
path: src/data/composite-chunk-source.ts
user: login: djwhitt
body: This should be `getChunkByAny`.
created_at: 2025-04-29T17:20:11Z
author_association: COLLABORATOR
diff_hunk: @@ -411,6 +415,12 @@ export const chunkDataSource =
         chunkDataStore: new FsChunkDataStore({ log, baseDir: 'data/chunks' }),
       });
 
+export const chunkDataSource =
+  config.CHUNK_DATA_SOURCE_TYPE === 'legacy-s3' &&
+  config.CHUNK_METADATA_SOURCE_TYPE === 'legacy-psql'
+    ? new CompositeChunkSource(chunkMetaDataSource, basicChunkDataSource)
+    : basicChunkDataSource;
path: src/system.ts
user: login: djwhitt
body: `basicChunkDataSource` won't have the right return type once other comments are taken into account, so we shouldn't fall back to it here. 
created_at: 2025-04-29T17:21:23Z
author_association: COLLABORATOR
diff_hunk: @@ -0,0 +1,68 @@
+/**
+ * AR.IO Gateway
+ * Copyright (C) 2022-2023 Permanent Data Solutions, Inc. All Rights Reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import {
+  ChunkMetadataByAnySource,
+  ChunkDataByAnySource,
+  ChunkDataByAnySourceParams,
+  Chunk,
+} from '../types';
+
+export class CompositeChunkSource implements ChunkDataByAnySource {
+  private readonly chunkMetaDataSource: ChunkMetadataByAnySource;
+  private readonly chunkDataSource: ChunkDataByAnySource;
+
+  constructor(
+    chunkMetaDataSource: ChunkMetadataByAnySource,
+    chunkDataSource: ChunkDataByAnySource,
+  ) {
+    this.chunkMetaDataSource = chunkMetaDataSource;
+    this.chunkDataSource = chunkDataSource;
+  }
+
+  async getChunkDataByAny(params: ChunkDataByAnySourceParams): Promise<Chunk> {
+    const metadata =
+      await this.chunkMetaDataSource.getChunkMetadataByAny(params);
+
+    if (metadata == null || typeof metadata !== 'object') {
path: src/data/composite-chunk-source.ts
user: login: hlolli
body: no, I forgot why I added it, if there's a reason to distrust the type, the function needs to return correct type
created_at: 2025-04-30T12:53:16Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,68 @@
+/**
+ * AR.IO Gateway
+ * Copyright (C) 2022-2023 Permanent Data Solutions, Inc. All Rights Reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import {
+  ChunkMetadataByAnySource,
+  ChunkDataByAnySource,
+  ChunkDataByAnySourceParams,
+  Chunk,
+} from '../types';
+
+export class CompositeChunkSource implements ChunkDataByAnySource {
+  private readonly chunkMetaDataSource: ChunkMetadataByAnySource;
+  private readonly chunkDataSource: ChunkDataByAnySource;
+
+  constructor(
+    chunkMetaDataSource: ChunkMetadataByAnySource,
+    chunkDataSource: ChunkDataByAnySource,
+  ) {
+    this.chunkMetaDataSource = chunkMetaDataSource;
+    this.chunkDataSource = chunkDataSource;
+  }
+
+  async getChunkDataByAny(params: ChunkDataByAnySourceParams): Promise<Chunk> {
+    const metadata =
+      await this.chunkMetaDataSource.getChunkMetadataByAny(params);
+
+    if (metadata == null || typeof metadata !== 'object') {
+      throw new Error(
+        `Invalid metadata returned for: ${JSON.stringify(params)}`,
+      );
+    }
+    const chunkDataParams: ChunkDataByAnySourceParams = {
+      txSize: params.txSize,
+      absoluteOffset: params.absoluteOffset,
+      dataRoot: params.dataRoot,
+      relativeOffset: metadata.offset, // aligned offset
+    };
+
+    const data = await this.chunkDataSource.getChunkDataByAny(chunkDataParams);
+
+    if (data == null || typeof data !== 'object') {
path: src/data/composite-chunk-source.ts
user: login: hlolli
body: good catch, same as before, probably not needed, I remove and test again locally
created_at: 2025-04-30T13:13:43Z
author_association: CONTRIBUTOR
diff_hunk: @@ -69,13 +70,24 @@ export class S3ChunkSource implements ChunkDataByAnySource {
     const response = await this.s3Client.GetObject({
       Bucket: this.s3Bucket,
       Key: key,
+      rawResponsePayload: true,
+      streamResponsePayload: false,
     });
 
-    if (!response.Body) {
+    // Error responses aren't easily detected with aws-lite, they always come in xml format
path: src/data/s3-chunk-source.ts
user: login: hlolli
body: I tried that, using newer version, (aws-lite we are on latest s3-provider for aws-lite already), but the issue I had was that the AWS_REGION was incorrect locally. Super strange, hard to find issue. We can remove this. This may be super rare and specific issue to my local setup.
created_at: 2025-04-30T13:15:08Z
author_association: CONTRIBUTOR
diff_hunk: @@ -93,36 +87,27 @@ export const createChunkOffsetHandler = ({
       return;
     }
 
-    if (chunkData === undefined) {
+    if (chunk === undefined) {
       response.sendStatus(404);
       return;
     }
 
     let chunkBase64Url: string | undefined = undefined;
+    let dataPath: string | undefined = undefined;
+
     try {
-      chunkBase64Url = toB64Url(chunkData.chunk);
+      chunkBase64Url = toB64Url(chunk.chunk);
     } catch (error) {
       log.error('Error converting chunk to base64url', { error });
       response.status(500).send('Error converting chunk to base64url');
       return;
     }
 
-    let chunkMetadata: ChunkMetadata | undefined = undefined;
-    let dataPath: string | undefined = undefined;
-
     try {
-      chunkMetadata = await chunkMetaDataSource.getChunkMetadataByAny({
-        txSize: data_size,
-        absoluteOffset: offset,
-        dataRoot: data_root,
-        relativeOffset,
-      });
+      dataPath = toB64Url(chunk.data_path);
     } catch (error) {
-      log.error('Error fetching chunk metadata', { error });
-    }
-
-    if (chunkMetadata) {
-      dataPath = toB64Url(chunkMetadata.data_path);
+      log.error('Error getting data path from chunk', { error });
+      return;
     }
path: src/routes/chunk/handlers.ts
user: login: coderabbitai[bot]
body: _⚠️ Potential issue_

**Error handling issue in data_path extraction**

The error handler for data_path extraction returns without sending a response, which will cause the request to hang.


```diff
  try {
    dataPath = toB64Url(chunk.data_path);
  } catch (error) {
    log.error('Error getting data path from chunk', { error });
-    return;
+    response.status(500).send('Error converting data path to base64url');
+    return;
  }
```


<!-- 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
    let dataPath: string | undefined = undefined;

    try {
      chunkBase64Url = toB64Url(chunk.chunk);
    } catch (error) {
      log.error('Error converting chunk to base64url', { error });
      response.status(500).send('Error converting chunk to base64url');
      return;
    }

    try {
      dataPath = toB64Url(chunk.data_path);
    } catch (error) {
      log.error('Error getting data path from chunk', { error });
      response.status(500).send('Error converting data path to base64url');
      return;
    }
`````

</details>

<!-- suggestion_end -->

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

✅ Addressed in commit d7cd615
created_at: 2025-04-30T13:20:21Z
author_association: CONTRIBUTOR
diff_hunk: @@ -93,36 +87,27 @@ export const createChunkOffsetHandler = ({
       return;
     }
 
-    if (chunkData === undefined) {
+    if (chunk === undefined) {
       response.sendStatus(404);
       return;
     }
 
     let chunkBase64Url: string | undefined = undefined;
+    let dataPath: string | undefined = undefined;
+
     try {
-      chunkBase64Url = toB64Url(chunkData.chunk);
+      chunkBase64Url = toB64Url(chunk.chunk);
     } catch (error) {
       log.error('Error converting chunk to base64url', { error });
       response.status(500).send('Error converting chunk to base64url');
       return;
     }
 
-    let chunkMetadata: ChunkMetadata | undefined = undefined;
-    let dataPath: string | undefined = undefined;
-
     try {
-      chunkMetadata = await chunkMetaDataSource.getChunkMetadataByAny({
-        txSize: data_size,
-        absoluteOffset: offset,
-        dataRoot: data_root,
-        relativeOffset,
-      });
+      dataPath = toB64Url(chunk.data_path);
     } catch (error) {
-      log.error('Error fetching chunk metadata', { error });
-    }
-
-    if (chunkMetadata) {
-      dataPath = toB64Url(chunkMetadata.data_path);
+      log.error('Error getting data path from chunk', { error });
+      return;
     }
path: src/routes/chunk/handlers.ts
user: login: hlolli
body: good catch
created_at: 2025-04-30T13:50:55Z
author_association: CONTRIBUTOR
diff_hunk: @@ -93,36 +87,27 @@ export const createChunkOffsetHandler = ({
       return;
     }
 
-    if (chunkData === undefined) {
+    if (chunk === undefined) {
       response.sendStatus(404);
       return;
     }
 
     let chunkBase64Url: string | undefined = undefined;
+    let dataPath: string | undefined = undefined;
+
     try {
-      chunkBase64Url = toB64Url(chunkData.chunk);
+      chunkBase64Url = toB64Url(chunk.chunk);
     } catch (error) {
       log.error('Error converting chunk to base64url', { error });
       response.status(500).send('Error converting chunk to base64url');
       return;
     }
 
-    let chunkMetadata: ChunkMetadata | undefined = undefined;
-    let dataPath: string | undefined = undefined;
-
     try {
-      chunkMetadata = await chunkMetaDataSource.getChunkMetadataByAny({
-        txSize: data_size,
-        absoluteOffset: offset,
-        dataRoot: data_root,
-        relativeOffset,
-      });
+      dataPath = toB64Url(chunk.data_path);
     } catch (error) {
-      log.error('Error fetching chunk metadata', { error });
-    }
-
-    if (chunkMetadata) {
-      dataPath = toB64Url(chunkMetadata.data_path);
+      log.error('Error getting data path from chunk', { error });
+      return;
     }
path: src/routes/chunk/handlers.ts
user: login: coderabbitai[bot]
body: @hlolli Thank you for the acknowledgment! Happy to help catch these kinds of issues. Good error handling ensures your API remains responsive even when unexpected conditions occur.

---

<!-- This is an auto-generated comment: tweet message by coderabbit.ai -->

If you found this review helpful, would you consider giving us a shout-out on [X](https://twitter.com/intent/tweet?related=CodeRabbitAI&text=%40coderabbitai%20spotted%20a%20critical%20error%20handling%20flaw%3A%20missing%20response%20on%20data_path%20extraction%20failure%20causing%20request%20hangs.%20Fix%20ensures%20proper%20500%20error%20reply%2C%20improving%20reliability!%20%F0%9F%9A%80%F0%9F%90%87%20Try%20it%20now!&url=https%3A%2F%2Fgithub.com%2Far-io%2Far-io-node%2Fpull%2F379%23discussion_r2068651638)?

Thank you for using CodeRabbit!

<!-- end of auto-generated comment: tweet message by coderabbit.ai -->




<!-- <agentComponentType>chat-answer</agentComponentType> -->

<!-- <rawResChunk><answer>@hlolli Thank you for the acknowledgment! Happy to help catch these kinds of issues. Good error handling ensures your API remains responsive even when unexpected conditions occur.

---

&lt;!-- This is an auto-generated comment: tweet message by coderabbit.ai --&gt;

If you found this review helpful, would you consider giving us a shout-out on [X](https://twitter.com/intent/tweet?related=CodeRabbitAI&text=%40coderabbitai%20spotted%20a%20critical%20error%20handling%20flaw%3A%20missing%20response%20on%20data_path%20extraction%20failure%20causing%20request%20hangs.%20Fix%20ensures%20proper%20500%20error%20reply%2C%20improving%20reliability!%20%F0%9F%9A%80%F0%9F%90%87%20Try%20it%20now!&url=https%3A%2F%2Fgithub.com%2Far-io%2Far-io-node%2Fpull%2F379%23discussion_r2068651638)?

Thank you for using CodeRabbit!

&lt;!-- end of auto-generated comment: tweet message by coderabbit.ai --&gt;

</answer></rawResChunk> -->

<!-- This is an auto-generated reply by CodeRabbit -->
created_at: 2025-04-30T13:51:23Z
author_association: CONTRIBUTOR

PR comments:
user: login: coderabbitai[bot]
created_at: 2025-04-25T17:01:19Z
body: <!-- This is an auto-generated comment: summarize by coderabbit.ai -->
<!-- walkthrough_start -->

<details>
<summary>📝 Walkthrough</summary>

"""
## Walkthrough

A new `CompositeChunkSource` class has been introduced to combine chunk metadata and data retrieval into a single interface. This class first obtains chunk metadata, then uses it to fetch the corresponding chunk data, and finally merges both into a single chunk object. The system configuration was updated to use this composite source as the main chunk source while retaining the original chunk data source for transaction chunks. Support for an optional AWS session token was added to the AWS client configuration. The S3 chunk source was modified to request raw buffer payloads and include stricter error handling. Route handlers and types were updated to accommodate the composite chunk structure and to allow `tx_path` to be optionally undefined. Additionally, caching logic was adjusted to handle cases where `tx_path` may be undefined.

## Changes

| File(s)                         | Change Summary                                                                                                 |
|--------------------------------|----------------------------------------------------------------------------------------------------------------|
| src/data/composite-chunk-source.ts | Added `CompositeChunkSource` class implementing `ChunkByAnySource`, composing metadata and data sources for chunk retrieval and merging results. |
| src/system.ts                  | Imported `CompositeChunkSource`. Added optional AWS session token support in AWS client config. Changed `chunkDataSource` to local constant. Added exported `chunkSource` as a `CompositeChunkSource` combining metadata and data sources. `txChunksDataSource` continues to use original chunk data source. |
| src/config.ts                 | Added export of optional `AWS_SESSION_TOKEN` environment variable with comment noting its optional usage.      |
| src/data/s3-chunk-source.ts    | Modified `getChunkDataByAny` to request raw response payload as buffer, added explicit error handling for XML error responses, and simplified buffer conversion. |
| src/routes/chunk/handlers.ts   | Updated handler to use unified `chunkSource.getChunkByAny` returning composite chunk. Adjusted extraction and encoding of chunk data and metadata. Updated error handling and response JSON accordingly. |
| src/routes/chunk/index.ts      | Consolidated imports from separate chunk data and metadata sources to single `chunkSource`. Updated handler argument accordingly. |
| src/types.d.ts                | Changed `Chunk` interface property `tx_path` from `Buffer` to `Buffer | undefined` to allow optional presence. |
| src/data/read-through-chunk-metadata-cache.ts | Updated caching logic to safely handle cases where `chunk.tx_path` is undefined by conditionally assigning `data_root`. |

## Sequence Diagram(s)

```mermaid
sequenceDiagram
    participant Client
    participant CompositeChunkSource
    participant ChunkMetadataByAnySource
    participant ChunkDataByAnySource

    Client->>CompositeChunkSource: getChunkByAny(params)
    CompositeChunkSource->>ChunkMetadataByAnySource: getChunkMetadataByAny(params)
    ChunkMetadataByAnySource-->>CompositeChunkSource: metadata
    CompositeChunkSource->>ChunkDataByAnySource: getChunkDataByAny({relativeOffset: metadata.offset, ...params})
    ChunkDataByAnySource-->>CompositeChunkSource: chunk data
    CompositeChunkSource-->>Client: merged Chunk (metadata + data, tx_path undefined)
```

## Suggested reviewers

- djwhitt
"""

</details>

<!-- walkthrough_end -->
<!-- This is an auto-generated comment: all tool run failures by coderabbit.ai -->

> [!WARNING]
> There were issues while running some tools. Please review the errors and either fix the tool's configuration or disable the tool if it's a critical failure.
> 
> <details>
> <summary>🔧 ESLint</summary>
> 
> > If the error stems from missing dependencies, add them to the package.json file. For unrecoverable errors (e.g., due to private dependencies), disable the tool in the CodeRabbit configuration.
> 
> yarn install v1.22.22
> [1/4] Resolving packages...
> [2/4] Fetching packages...
> error @permaweb/aoconnect@0.0.57: The engine "yarn" is incompatible with this module. Expected version "please-use-npm". Got "1.22.22"
> error Found incompatible module.
> info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.
> 
> 
> 
> </details>

<!-- end of auto-generated comment: all tool run failures by coderabbit.ai -->


---

<details>
<summary>📜 Recent 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 f9c70fc47dc3f21f9006c2d130eb797fe43d2748 and d7cd615c75a6d354b6697a5596e195ea17953826.

</details>

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

* `src/config.ts` (1 hunks)
* `src/data/composite-chunk-source.ts` (1 hunks)
* `src/data/read-through-chunk-metadata-cache.ts` (1 hunks)
* `src/data/s3-chunk-source.ts` (2 hunks)
* `src/routes/chunk/handlers.ts` (3 hunks)
* `src/routes/chunk/index.ts` (2 hunks)
* `src/system.ts` (4 hunks)
* `src/types.d.ts` (1 hunks)

</details>

<details>
<summary>✅ Files skipped from review due to trivial changes (1)</summary>

* src/routes/chunk/index.ts

</details>

<details>
<summary>🚧 Files skipped from review as they are similar to previous changes (7)</summary>

* src/types.d.ts
* src/config.ts
* src/data/read-through-chunk-metadata-cache.ts
* src/data/s3-chunk-source.ts
* src/system.ts
* src/data/composite-chunk-source.ts
* src/routes/chunk/handlers.ts

</details>

<details>
<summary>⏰ Context from checks skipped due to timeout of 90000ms (2)</summary>

* GitHub Check: test (macos-latest)
* GitHub Check: test (ubuntu-latest)

</details>

</details>
<!-- internal state start -->


<!-- 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= -->

<!-- internal state end -->
<!-- finishing_touch_checkbox_start -->

<details open="true">
<summary>✨ Finishing Touches</summary>

- [ ] <!-- {"checkboxId": "7962f53c-55bc-4827-bfbf-6a18da830691"} --> 📝 Generate Docstrings

</details>

<!-- finishing_touch_checkbox_end -->
<!-- tips_start -->

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

<details>
<summary>❤️ Share</summary>

- [X](https://twitter.com/intent/tweet?text=I%20just%20used%20%40coderabbitai%20for%20my%20code%20review%2C%20and%20it%27s%20fantastic%21%20It%27s%20free%20for%20OSS%20and%20offers%20a%20free%20trial%20for%20the%20proprietary%20code.%20Check%20it%20out%3A&url=https%3A//coderabbit.ai)
- [Mastodon](https://mastodon.social/share?text=I%20just%20used%20%40coderabbitai%20for%20my%20code%20review%2C%20and%20it%27s%20fantastic%21%20It%27s%20free%20for%20OSS%20and%20offers%20a%20free%20trial%20for%20the%20proprietary%20code.%20Check%20it%20out%3A%20https%3A%2F%2Fcoderabbit.ai)
- [Reddit](https://www.reddit.com/submit?title=Great%20tool%20for%20code%20review%20-%20CodeRabbit&text=I%20just%20used%20CodeRabbit%20for%20my%20code%20review%2C%20and%20it%27s%20fantastic%21%20It%27s%20free%20for%20OSS%20and%20offers%20a%20free%20trial%20for%20proprietary%20code.%20Check%20it%20out%3A%20https%3A//coderabbit.ai)
- [LinkedIn](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Fcoderabbit.ai&mini=true&title=Great%20tool%20for%20code%20review%20-%20CodeRabbit&summary=I%20just%20used%20CodeRabbit%20for%20my%20code%20review%2C%20and%20it%27s%20fantastic%21%20It%27s%20free%20for%20OSS%20and%20offers%20a%20free%20trial%20for%20proprietary%20code)

</details>

<details>
<summary>🪧 Tips</summary>

### Chat

There are 3 ways to chat with [CodeRabbit](https://coderabbit.ai?utm_source=oss&utm_medium=github&utm_campaign=ar-io/ar-io-node&utm_content=379):

- Review comments: Directly reply to a review comment made by CodeRabbit. Example:
  - `I pushed a fix in commit <commit_id>, please review it.`
  - `Generate unit testing code for this file.`
  - `Open a follow-up GitHub issue for this discussion.`
- Files and specific lines of code (under the "Files changed" tab): Tag `@coderabbitai` in a new review comment at the desired location with your query. Examples:
  - `@coderabbitai generate unit testing code for this file.`
  -	`@coderabbitai modularize this function.`
- PR comments: Tag `@coderabbitai` in a new PR comment to ask questions about the PR branch. For the best results, please provide a very specific query, as very limited context is provided in this mode. Examples:
  - `@coderabbitai gather interesting stats about this repository and render them as a table. Additionally, render a pie chart showing the language distribution in the codebase.`
  - `@coderabbitai read src/utils.ts and generate unit testing code.`
  - `@coderabbitai read the files in the src/scheduler package and generate a class diagram using mermaid and a README in the markdown format.`
  - `@coderabbitai help me debug CodeRabbit configuration file.`

Note: Be mindful of the bot's finite context window. It's strongly recommended to break down tasks such as reading entire modules into smaller chunks. For a focused discussion, use review comments to chat about specific files and their changes, instead of using the PR comments.

### CodeRabbit Commands (Invoked using PR comments)

- `@coderabbitai pause` to pause the reviews on a PR.
- `@coderabbitai resume` to resume the paused reviews.
- `@coderabbitai review` to trigger an incremental review. This is useful when automatic reviews are disabled for the repository.
- `@coderabbitai full review` to do a full review from scratch and review all the files again.
- `@coderabbitai summary` to regenerate the summary of the PR.
- `@coderabbitai generate docstrings` to [generate docstrings](https://docs.coderabbit.ai/finishing-touches/docstrings) for this PR.
- `@coderabbitai generate sequence diagram` to generate a sequence diagram of the changes in this PR.
- `@coderabbitai resolve` resolve all the CodeRabbit review comments.
- `@coderabbitai configuration` to show the current CodeRabbit configuration for the repository.
- `@coderabbitai help` to get help.

### Other keywords and placeholders

- Add `@coderabbitai ignore` anywhere in the PR description to prevent this PR from being reviewed.
- Add `@coderabbitai summary` to generate the high-level summary at a specific location in the PR description.
- Add `@coderabbitai` anywhere in the PR title to generate the title automatically.

### CodeRabbit Configuration File (`.coderabbit.yaml`)

- You can programmatically configure CodeRabbit by adding a `.coderabbit.yaml` file to the root of your repository.
- Please see the [configuration documentation](https://docs.coderabbit.ai/guides/configure-coderabbit) for more information.
- If your editor has YAML language server enabled, you can add the path at the top of this file to enable auto-completion and validation: `# yaml-language-server: $schema=https://coderabbit.ai/integrations/schema.v2.json`

### Documentation and Community

- Visit our [Documentation](https://docs.coderabbit.ai) for detailed information on how to use CodeRabbit.
- Join our [Discord Community](http://discord.gg/coderabbit) to get help, request features, and share feedback.
- Follow us on [X/Twitter](https://twitter.com/coderabbitai) for updates and announcements.

</details>

<!-- tips_end -->
author_association: CONTRIBUTOR
user: login: codecov[bot]
created_at: 2025-04-25T17:01:44Z
body: ## [Codecov](https://app.codecov.io/gh/ar-io/ar-io-node/pull/379?dropdown=coverage&src=pr&el=h1&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ar-io) Report
All modified and coverable lines are covered by tests :white_check_mark:
> Project coverage is 73.27%. Comparing base [(`0b67589`)](https://app.codecov.io/gh/ar-io/ar-io-node/commit/0b67589922e6b24cf1bfe314786343f89e36847c?dropdown=coverage&el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ar-io) to head [(`d7cd615`)](https://app.codecov.io/gh/ar-io/ar-io-node/commit/d7cd615c75a6d354b6697a5596e195ea17953826?dropdown=coverage&el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ar-io).
> Report is 13 commits behind head on develop.

<details><summary>Additional details and impacted files</summary>


```diff
@@           Coverage Diff            @@
##           develop     #379   +/-   ##
========================================
  Coverage    73.26%   73.27%           
========================================
  Files           47       47           
  Lines        12000    12002    +2     
  Branches       708      708           
========================================
+ Hits          8792     8794    +2     
  Misses        3202     3202           
  Partials         6        6           
```

</details>

[:umbrella: View full report in Codecov by Sentry](https://app.codecov.io/gh/ar-io/ar-io-node/pull/379?dropdown=coverage&src=pr&el=continue&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ar-io).   
:loudspeaker: Have feedback on the report? [Share it here](https://about.codecov.io/codecov-pr-comment-feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ar-io).

<details><summary> :rocket: New features to boost your workflow: </summary>

- :snowflake: [Test Analytics](https://docs.codecov.com/docs/test-analytics): Detect flaky tests, report on failures, and find test suite problems.
- :package: [JS Bundle Analysis](https://docs.codecov.com/docs/javascript-bundle-analysis): Save yourself from yourself by tracking and limiting bundle sizes in JS merges.
</details>
author_association: NONE