Implement Bitcoin Transaction Signing with AWS KMS and scure-btc-signer

[devin-ai-integration]

Implement Bitcoin Transaction Signing with AWS KMS and scure-btc-signer in Llavero Repository

Description

This pull request implements a system for signing Bitcoin transactions using AWS Key Management Service (KMS) and the scure-btc-signer library within the Llavero repository. The implementation focuses on secure key management, transaction hashing, signing, construction, and verification, with comprehensive documentation and testing.

Changes

• Project Setup:

  • Cloned and set up the Llavero repository.
  • Configured Yarn workspaces in the Llavero repository.

• Key Management:

  • Used AWS KMS to generate and store elliptic curve keys compatible with Bitcoin’s secp256k1 curve.
  • Ensured the keys can be retrieved securely when needed for signing.

• Transaction Hashing:

  • Utilized scure-btc-signer to perform double SHA-256 hashing of the Bitcoin transaction message.

• Signing:

  • Integrated with AWS KMS to sign the hashed Bitcoin transaction message using the stored keys.
  • Extracted and correctly formatted the ( r ) and ( s ) values from the signature returned by AWS KMS.

• Transaction Construction:

  • Constructed the final Bitcoin transaction using scure-btc-signer, including the signed hash, ( r ) and ( s ) values, and the necessary transaction details.
  • Validated the constructed transaction using scure-btc-signer to ensure it meets Bitcoin network requirements.

• Verification:

  • Implemented a verification method using scure-btc-signer to ensure the generated signature is valid and can be verified using the public key.

• Error Handling:

  • Handled errors related to key generation, storage, and retrieval in AWS KMS.
  • Managed errors that may occur during the signing process, including network issues with AWS KMS.
  • Detected and reported any issues during transaction construction and validation.

• Documentation and Testing:

  • Provided detailed documentation on the implementation process, including code comments, API usage, and configuration instructions.
  • Developed unit tests for the hashing and signing processes, and integration tests to ensure the complete workflow operates correctly.
  • Conducted a security review to identify and mitigate potential vulnerabilities in the implementation.

Checklist

• Project setup
• Key management
• Transaction hashing
• Signing
• Transaction construction
• Verification
• Error handling
• Documentation and testing
• Test the changes

Notes

• This PR was written by Devin-AI.
• Please review the changes and provide feedback.