feat(wasm-utxo): add PSBT signature verification and txid methods#58
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Added `unsignedTxid` method to BitGoPsbt class, which returns the transaction ID of the unsigned transaction contained in the PSBT. Added tests to verify the method works correctly. Issue: BTC-2652 Co-authored-by: llm-git <llm-git@ttll.de>
Add two methods for verifying transaction signatures: - verifySignature - Verify ECDSA, Schnorr, or MuSig2 signatures based on xpub derivation path found in the PSBT - verifyReplayProtectionSignature - Verify signatures in replay protection inputs (P2SH-P2PK) These methods enable transaction validation without requiring full re-signing, which is particularly useful when checking the signing state of PSBTs across different types of inputs. Issue: BTC-2652 Co-authored-by: llm-git <llm-git@ttll.de>
OttoAllmendinger
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davidkaplanbitgo
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Nov 12, 2025
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This PR adds signature verification and transaction ID functionality to the
BitGoPsbt class:
unsignedTxidmethod to extract the transaction ID from an unsignedPSBT
verifySignaturemethod for validating ECDSA, Schnorr, and MuSig2signatures using xpub derivation paths in the PSBT
verifyReplayProtectionSignaturemethod specifically for verifyingsignatures in replay protection inputs (P2SH-P2PK)
These methods enable transaction validation without requiring full
re-signing, which is particularly useful when checking the signing
state of PSBTs across different types of inputs.
Issue: BTC-2652