@node-dlc/bitcoin/lib/SigHashType.ts

DLC bitcoin

export enum SigHashType {
  SIGHASH_ALL = 0x01,
  SIGHASH_NONE = 0x02,
  SIGHASH_SINGLE = 0x03,
  SIGHASH_ANYONECANPAY = 0x80,
}

export function isSigHashTypeValid(type: SigHashType): boolean {
  if (type === SigHashType.SIGHASH_ALL) return true;
  if (type === SigHashType.SIGHASH_NONE) return true;
  if (type === SigHashType.SIGHASH_SINGLE) return true;
  if (type === (SigHashType.SIGHASH_ALL | SigHashType.SIGHASH_ANYONECANPAY))
    return true;
  if (type === (SigHashType.SIGHASH_NONE | SigHashType.SIGHASH_ANYONECANPAY))
    return true;
  if (type === (SigHashType.SIGHASH_SINGLE | SigHashType.SIGHASH_ANYONECANPAY))
    return true;
  return false;
}