Coroner: every token dies. We write the report.

Coroner Coder 7B

A small model that fixes the patterns the Coroner scanner flags in an ERC-20 token contract: it takes a Solidity source plus the scanner's flags and returns a corrected contract and a short list of changes.

Always compile and review the result yourself. A patch that compiles is not an audit. Not financial or security advice.

What it fixes

The same patterns the Coroner pre-mortem scanner reports from source code: mint_with_live_owner, blacklist_function, pause_function, tax_changeable, risky_opcode (selfdestruct, delegatecall, tx.origin) and owner_privileges.

Training

  • Base: Qwen2.5-Coder-7B-Instruct (Apache 2.0). Method: LoRA (rank 16) on 4-bit weights, one epoch (88 steps), then merged to 16-bit.
  • Data: 1,400 synthetic examples. Each is a flawed token contract with its fix, generated from templates in two source layouts. Every target is verified: the corrected contract compiles with solc 0.8.24, keeps the ERC-20 interface and clears the flagged patterns. Generator and verifier: https://github.com/coroner-hash/ai/tree/main/coder

Evaluation

A fix counts only if the patched contract compiles, keeps the ERC-20 interface, clears every flag and adds none. 40 held-out contracts in a third source layout the model never saw in training (greedy decoding):

Base model Coroner Coder
Compiles 1.00 0.925
Flags cleared 0.125 0.925
Full fix (all checks) 0.125 0.925

Returning the contract unchanged scores 0.05. In the layouts it was trained on the model scores 1.00, which mostly shows it learned the templates.

Limits

  • Synthetic, narrow data. All contracts are single-file ERC-20 variants without imports. Real contracts from a market will be messier; expect lower numbers. This is a first version.
  • About 1 in 13 outputs did not compile in the held-out test. Always compile.
  • It removes risky features; it does not find new bugs, and it can change behaviour. Review the diff.
  • Only the scanner's six patterns. Not a general Solidity auditor.

Source, data generator and scorer: https://github.com/coroner-hash/ai

Downloads last month
6
Safetensors
Model size
8B params
Tensor type
BF16
·
Inference Providers NEW
This model isn't deployed by any Inference Provider. 🙋 Ask for provider support

Model tree for coronerai/coroner-coder-7b

Base model

Qwen/Qwen2.5-7B
Adapter
(823)
this model
Adapters
1 model