calculateTweek static method
_calculateTweek computes and returns the TapTweak value based on the ECPublic key and an optional script. It uses the key's x-coordinate and the Merkle root of the script (if provided) to calculate the tweak.
Implementation
static List<int> calculateTweek(ProjectiveECCPoint pubPoint,
{List<dynamic>? script}) {
final keyX =
BigintUtils.toBytes(pubPoint.x, length: pubPoint.curve.baselen);
if (script == null) {
final tweek = taggedHash("TapTweak", keyX);
return tweek;
}
final merkleRoot = _getTagHashedMerkleRoot(script);
final tweek = taggedHash("TapTweak", [...keyX, ...merkleRoot]);
return tweek;
}