/**
* Creates a program that requires at least N of the given keys to sign, using OP_CHECKMULTISIG.
*/
public static Script createMultiSigOutputScript(int threshold, List<ECKey> pubkeys) {
checkArgument(threshold > 0);
checkArgument(threshold <= pubkeys.size());
checkArgument(pubkeys.size() <= 16); // That's the max we can represent with a single opcode.
ScriptBuilder builder = new ScriptBuilder();
builder.smallNum(threshold);
for (ECKey key : pubkeys) {
builder.data(key.getPubKey());
}
builder.smallNum(pubkeys.size());
builder.op(OP_CHECKMULTISIG);
return builder.build();
}
/**
* Creates a scriptSig that can redeem a pay-to-address output. If given signature is null,
* incomplete scriptSig will be created with OP_0 instead of signature
*/
public static Script createInputScript(@Nullable TransactionSignature signature, ECKey pubKey) {
byte[] pubkeyBytes = pubKey.getPubKey();
byte[] sigBytes = signature != null ? signature.encodeToPeercoin() : new byte[] {};
return new ScriptBuilder().data(sigBytes).data(pubkeyBytes).build();
}
/** Creates a scriptPubKey that encodes payment to the given raw public key. */
public static Script createOutputScript(ECKey key) {
return new ScriptBuilder().data(key.getPubKey()).op(OP_CHECKSIG).build();
}