@btc-vision/transaction
Version:
OPNet transaction library allows you to create and sign transactions for the OPNet network.
54 lines • 2.43 kB
JavaScript
import { alloc, compare, equals, opcodes, script, toXOnly, } from '@btc-vision/bitcoin';
/**
* Generate a bitcoin script for a multisign interaction
*/
export class MultiSignGenerator {
static MAXIMUM_SUPPORTED_SIGNATURE = 255;
static compile(vaultPublicKeys, minimumSignatures = 0, internal) {
if (minimumSignatures < 2) {
throw new Error('Minimum signatures must be greater than 1');
}
if (vaultPublicKeys.length < minimumSignatures) {
throw new Error('The amount of public keys is lower than the minimum required');
}
if (minimumSignatures > MultiSignGenerator.MAXIMUM_SUPPORTED_SIGNATURE) {
throw new Error(`The maximum amount of signatures is ${MultiSignGenerator.MAXIMUM_SUPPORTED_SIGNATURE}`);
}
const minimumRequired = alloc(1);
minimumRequired[0] = minimumSignatures;
/** Remove duplicates **/
vaultPublicKeys = vaultPublicKeys.filter((buf, index, self) => index === self.findIndex((otherBuf) => equals(buf, otherBuf)));
/** We must order the pub keys. */
vaultPublicKeys = vaultPublicKeys.sort((a, b) => compare(a, b));
let included = false;
const data = vaultPublicKeys.map((key) => {
const newKey = toXOnly(key);
if (internal && !included)
included = equals(internal, newKey);
return newKey;
});
if (internal && !included)
data.push(internal);
const compiledData = [
// Push the initial 0 (for OP_CHECKSIGADD)
opcodes.OP_0,
// For each public key, add CHECKSIGADD operation
...data.flatMap((key) => [
key, // Push the public key
opcodes.OP_CHECKSIGADD, // Add the public key to the signature set
]),
// Finally, compare the sum with the minimum required signatures
minimumRequired,
opcodes.OP_NUMEQUAL, // Use NUMEQUALVERIFY to ensure the correct number of signatures
];
const asm = compiledData.flat();
const compiled = script.compile(asm);
/** Verify the validity of the script */
const decompiled = script.decompile(compiled);
if (!decompiled) {
throw new Error('Failed to decompile script.');
}
return compiled;
}
}
//# sourceMappingURL=MultiSignGenerator.js.map