Module bitcoin::sighash

Signature hash implementation (used in transaction signing).

Efficient implementation of the algorithm to compute the message to be signed according to Bip341, Bip143 and legacy (before Bip143).

Computing signature hashes is required to sign a transaction and this module is designed to handle its complexity efficiently. Computing these hashes is as simple as creating SighashCache and calling its methods.

Structs

• Annex
  The Annex struct is a slice wrapper enforcing first byte is 0x50.
• LegacySighash
  Hash of a transaction according to the legacy signature algorithm.
• NonStandardSighashType
  This type is consensus valid but an input including it would prevent the transaction from being relayed on today’s Bitcoin network.
• ScriptPath
  Information related to the script path spending.
• SegwitV0Sighash
  Hash of a transaction according to the segwit version 0 signature algorithm.
• SighashCache
  Efficiently calculates signature hash message for legacy, segwit and taproot inputs.
• SighashTypeParseError
  Error returned for failure during parsing one of the sighash types.
• TapSighash
  Taproot-tagged hash with tag “TapSighash”.
• TapSighashTag
  The tag used for TapSighash

Enums

• EcdsaSighashType
  Hashtype of an input’s signature, encoded in the last byte of the signature.
• Error
  Possible errors in computing the signature message.
• Prevouts
  Contains outputs of previous transactions. In the case TapSighashType variant is SIGHASH_ANYONECANPAY, Prevouts::One may be used.
• TapSighashType
  Hashtype of an input’s signature, encoded in the last byte of the signature. Fixed values so they can be cast as integer types for encoding.