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The P2WPKH_MAX constant assumed DER signatures in the witness have a max length of 73. However, their maximum length in practice is 72, because BIP62 forbids nodes from relaying transactions whose ECDSA signatures are not canonical (i.e. all sigs must have an s value of less than n/2). This means s is never encoded with a leading zero byte, and the signature as a whole never exceeds 72 bytes in total encoded length. The ground_p2wpkh function was already correct; only the constant needed to be corrected. |
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| CHANGELOG.md | ||
| Cargo.toml | ||
| build.rs | ||