feat(wasm-utxo): add PSBT wallet validation and transaction parsing #47
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Move BitGo PSBT functionality from root module to fixed_script_wallet where it logically belongs. Update imports and paths across files to maintain functionality. Also move psbt_wallet_input.rs into the bitgo_psbt module. Issue: BTC-2652 Co-authored-by: llm-git <llm-git@ttll.de>
Implements a new BitGoPsbt class that allows parsing PSBT transactions to identify wallet inputs and outputs. This implementation provides: - PSBT deserialization with network-specific handling - Transaction parsing with wallet script identification - Input validation with replay protection support - Output classification (internal vs external) - Fee and spend amount calculations The implementation extracts derivation info from PSBT inputs/outputs to match against wallet keys, providing a structured view of transactions for wallet UIs and validation purposes. Added comprehensive tests for the new functionality across all supported networks. Includes TypeScript definitions and integration with existing fixed script wallet functionality. Issue: BTC-2652 Co-authored-by: llm-git <llm-git@ttll.de>
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davidkaplanbitgo
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Nov 7, 2025
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This PR adds comprehensive PSBT (Partially Signed Bitcoin Transaction)
validation and transaction parsing capabilities to the wasm-utxo module.
It focuses on:
Adding input validation to ensure PSBT inputs belong to the specified
wallet by verifying key derivations and implementing replay protection
Reorganizing code structure by moving BitGo PSBT functionality from
root module to fixed_script_wallet where it logically belongs
Implementing a new BitGoPsbt class for transaction parsing with:
The implementation provides detailed error reporting and includes
comprehensive tests across all supported networks.
Issue: BTC-2652