How to use the bitcore.Opcode.OP_DUP function in bitcore
To help you get started, we’ve selected a few bitcore examples, based on popular ways it is used in public projects.
Secure your code as it's written. Use Snyk Code to scan source code in minutes - no build needed - and fix issues immediately.
AltCoinExchange / altcoin-atomic-trading-platform / wallet-ts / src / common / contract.ts View on Github 
const pops = contract.toString().split(' ');
const opCodes = pops.filter(opcode => opcode.indexOf('0x') === -1);
const isAtomicSwap =
(new Opcode(opCodes[0]).toString() === new Opcode(Opcode.OP_IF).toString()) &&
(new Opcode(opCodes[1]).toString() === new Opcode(Opcode.OP_RIPEMD160).toString()) &&
(parseInt(opCodes[2]) === 20) &&
(new Opcode(opCodes[3]).toString() === new Opcode(Opcode.OP_EQUALVERIFY).toString()) &&
(new Opcode(opCodes[4]).toString() === new Opcode(Opcode.OP_DUP).toString()) &&
(new Opcode(opCodes[5]).toString() === new Opcode(Opcode.OP_HASH160).toString()) &&
(parseInt(opCodes[6]) === 20) &&
(new Opcode(opCodes[7]).toString() === new Opcode(Opcode.OP_ELSE).toString()) &&
(parseInt(opCodes[8])) &&
(new Opcode(opCodes[9]).toString() === new Opcode(Opcode.OP_CHECKLOCKTIMEVERIFY).toString()) &&
(new Opcode(opCodes[10]).toString() === new Opcode(Opcode.OP_DROP).toString()) &&
(new Opcode(opCodes[11]).toString() === new Opcode(Opcode.OP_DUP).toString()) &&
(new Opcode(opCodes[12]).toString() === new Opcode(Opcode.OP_HASH160).toString()) &&
(parseInt(opCodes[13]) === 20) &&
(new Opcode(opCodes[14]).toString() === new Opcode(Opcode.OP_ENDIF).toString()) &&
(new Opcode(opCodes[15]).toString() === new Opcode(Opcode.OP_EQUALVERIFY).toString()) &&
(new Opcode(opCodes[16]).toString() === new Opcode(Opcode.OP_CHECKSIG).toString());
if (!isAtomicSwap) {
console.error('contract is not an atomic swap script!');
return;
}
const data = pops.filter(opcode => opcode.indexOf('0x') !== -1);
const secretHash = data[0];
const recipientHash = data[1];
const lockTime = data[2].replace('0x', '');export const extractAtomicSwapContract = (ct) => {
const contract = new Script(ct);
const pops = contract.toString().split(' ');
const opCodes = pops.filter(opcode => opcode.indexOf('0x') === -1);
const isAtomicSwap =
(new Opcode(opCodes[0]).toString() === new Opcode(Opcode.OP_IF).toString()) &&
(new Opcode(opCodes[1]).toString() === new Opcode(Opcode.OP_RIPEMD160).toString()) &&
(parseInt(opCodes[2]) === 20) &&
(new Opcode(opCodes[3]).toString() === new Opcode(Opcode.OP_EQUALVERIFY).toString()) &&
(new Opcode(opCodes[4]).toString() === new Opcode(Opcode.OP_DUP).toString()) &&
(new Opcode(opCodes[5]).toString() === new Opcode(Opcode.OP_HASH160).toString()) &&
(parseInt(opCodes[6]) === 20) &&
(new Opcode(opCodes[7]).toString() === new Opcode(Opcode.OP_ELSE).toString()) &&
(parseInt(opCodes[8])) &&
(new Opcode(opCodes[9]).toString() === new Opcode(Opcode.OP_CHECKLOCKTIMEVERIFY).toString()) &&
(new Opcode(opCodes[10]).toString() === new Opcode(Opcode.OP_DROP).toString()) &&
(new Opcode(opCodes[11]).toString() === new Opcode(Opcode.OP_DUP).toString()) &&
(new Opcode(opCodes[12]).toString() === new Opcode(Opcode.OP_HASH160).toString()) &&
(parseInt(opCodes[13]) === 20) &&
(new Opcode(opCodes[14]).toString() === new Opcode(Opcode.OP_ENDIF).toString()) &&
(new Opcode(opCodes[15]).toString() === new Opcode(Opcode.OP_EQUALVERIFY).toString()) &&
(new Opcode(opCodes[16]).toString() === new Opcode(Opcode.OP_CHECKSIG).toString());
if (!isAtomicSwap) {
console.error('contract is not an atomic swap script!')
return;private extractAtomicSwapContract(ct: any) {
const contract = new Script(ct);
const pops = contract.toString().split(' ');
const opCodes = pops.filter(opcode => opcode.indexOf('0x') === -1);
const isAtomicSwap =
(new Opcode(opCodes[0]).toString() === new Opcode(Opcode.OP_IF).toString()) &&
(new Opcode(opCodes[1]).toString() === new Opcode(Opcode.OP_RIPEMD160).toString()) &&
(parseInt(opCodes[2]) === 20) &&
(new Opcode(opCodes[3]).toString() === new Opcode(Opcode.OP_EQUALVERIFY).toString()) &&
(new Opcode(opCodes[4]).toString() === new Opcode(Opcode.OP_DUP).toString()) &&
(new Opcode(opCodes[5]).toString() === new Opcode(Opcode.OP_HASH160).toString()) &&
(parseInt(opCodes[6]) === 20) &&
(new Opcode(opCodes[7]).toString() === new Opcode(Opcode.OP_ELSE).toString()) &&
(parseInt(opCodes[8])) &&
(new Opcode(opCodes[9]).toString() === new Opcode(Opcode.OP_CHECKLOCKTIMEVERIFY).toString()) &&
(new Opcode(opCodes[10]).toString() === new Opcode(Opcode.OP_DROP).toString()) &&
(new Opcode(opCodes[11]).toString() === new Opcode(Opcode.OP_DUP).toString()) &&
(new Opcode(opCodes[12]).toString() === new Opcode(Opcode.OP_HASH160).toString()) &&
(parseInt(opCodes[13]) === 20) &&
(new Opcode(opCodes[14]).toString() === new Opcode(Opcode.OP_ENDIF).toString()) &&
(new Opcode(opCodes[15]).toString() === new Opcode(Opcode.OP_EQUALVERIFY).toString()) &&
(new Opcode(opCodes[16]).toString() === new Opcode(Opcode.OP_CHECKSIG).toString());
if (!isAtomicSwap) {
console.error('contract is not an atomic swap script!');
return;};
const script = new Script();
script.add(Opcode.OP_IF);
script.add(Opcode.OP_RIPEMD160);
script.add(new Buffer(secretHash, 'hex'));
script.add(Opcode.OP_EQUALVERIFY);
script.add(Opcode.OP_DUP);
script.add(Opcode.OP_HASH160);
script.add(new Buffer(pkhThem, 'hex'));
script.add(Opcode.OP_ELSE);
script.add(new Buffer(decimalToHexString(conv(lockTime)[0]), 'hex'));
script.add('OP_CHECKLOCKTIMEVERIFY');
script.add(Opcode.OP_DROP);
script.add(Opcode.OP_DUP);
script.add(Opcode.OP_HASH160);
script.add(new Buffer(refundAddress, 'hex'));
script.add(Opcode.OP_ENDIF);
script.add(Opcode.OP_EQUALVERIFY);
script.add(Opcode.OP_CHECKSIG);
return script;
}
}value: function payToPubKeyHashScript(pubKeyHash) {
var script = new Script();
script.add(Opcode.OP_DUP);
script.add(Opcode.OP_HASH160);
script.add(new Buffer(pubKeyHash, 'hex'));
script.add(Opcode.OP_EQUALVERIFY);
script.add(Opcode.OP_CHECKSIG);
return script;
}
}]);};
const decimalToHexString = (number) => {
if (number < 0) {
number = 0xFFFFFFFF + number + 1;
}
return number.toString(16).toUpperCase();
};
const script = new Script();
script.add(Opcode.OP_IF);
script.add(Opcode.OP_RIPEMD160);
script.add(new Buffer(secretHash, 'hex'));
script.add(Opcode.OP_EQUALVERIFY);
script.add(Opcode.OP_DUP);
script.add(Opcode.OP_HASH160);
script.add(new Buffer(pkhThem, 'hex'));
script.add(Opcode.OP_ELSE);
script.add(new Buffer(decimalToHexString(conv(lockTime)[0]), 'hex'));
script.add('OP_CHECKLOCKTIMEVERIFY');
script.add(Opcode.OP_DROP);
script.add(Opcode.OP_DUP);
script.add(Opcode.OP_HASH160);
script.add(new Buffer(refundAddress, 'hex'));
script.add(Opcode.OP_ENDIF);
script.add(Opcode.OP_EQUALVERIFY);
script.add(Opcode.OP_CHECKSIG);
return script;export const atomicSwapContract = (refundAddress, pkhThem, lockTime, secretHash) => {
const script = new Script();
script.add(Opcode.OP_IF);
script.add(Opcode.OP_RIPEMD160);
script.add(Buffer.from(secretHash));
script.add(Opcode.OP_EQUALVERIFY);
script.add(Opcode.OP_DUP);
script.add(Opcode.OP_HASH160);
script.add(Buffer.from(pkhThem));
script.add(Opcode.OP_ELSE);
script.add(Buffer.from(String(lockTime)));
script.add('OP_CHECKLOCKTIMEVERIFY');
script.add(Opcode.OP_DROP);
script.add(Opcode.OP_DUP);
script.add(Opcode.OP_HASH160);
script.add(Buffer.from(refundAddress));
script.add(Opcode.OP_ENDIF);
script.add(Opcode.OP_EQUALVERIFY);
script.add(Opcode.OP_CHECKSIG);
return script;
};var atomicSwapContract = exports.atomicSwapContract = function atomicSwapContract(refundAddress, pkhThem, lockTime, secretHash) {
var script = new Script();
script.add(Opcode.OP_IF);
script.add(Opcode.OP_RIPEMD160);
script.add(new Buffer(secretHash, 'hex'));
script.add(Opcode.OP_EQUALVERIFY);
script.add(Opcode.OP_DUP);
script.add(Opcode.OP_HASH160);
script.add(new Buffer(pkhThem, 'hex'));
script.add(Opcode.OP_ELSE);
script.add(new Buffer(String(lockTime), 'hex'));
script.add('OP_CHECKLOCKTIMEVERIFY');
script.add(Opcode.OP_DROP);
script.add(Opcode.OP_DUP);
script.add(Opcode.OP_HASH160);
script.add(new Buffer(refundAddress, 'hex'));
script.add(Opcode.OP_ENDIF);
script.add(Opcode.OP_EQUALVERIFY);
script.add(Opcode.OP_CHECKSIG);
return script;};
var script = new Script();
script.add(Opcode.OP_IF);
script.add(Opcode.OP_RIPEMD160);
script.add(new Buffer(secretHash, 'hex'));
script.add(Opcode.OP_EQUALVERIFY);
script.add(Opcode.OP_DUP);
script.add(Opcode.OP_HASH160);
script.add(new Buffer(pkhThem, 'hex'));
script.add(Opcode.OP_ELSE);
script.add(new Buffer(decimalToHexString(conv(lockTime)[0]), 'hex'));
script.add('OP_CHECKLOCKTIMEVERIFY');
script.add(Opcode.OP_DROP);
script.add(Opcode.OP_DUP);
script.add(Opcode.OP_HASH160);
script.add(new Buffer(refundAddress, 'hex'));
script.add(Opcode.OP_ENDIF);
script.add(Opcode.OP_EQUALVERIFY);
script.add(Opcode.OP_CHECKSIG);
return script;
};bitcore
A platform to build bitcoin and blockchain-based applications.
Package Health Score
64 / 100Popular bitcore functions
- bitcore.Address
- bitcore.crypto
- bitcore.deps
- bitcore.encoding
- bitcore.HDPrivateKey
- bitcore.Key
- bitcore.Networks
- bitcore.networks
- bitcore.Opcode
- bitcore.Opcode.OP_CHECKSIG
- bitcore.Opcode.OP_DROP
- bitcore.Opcode.OP_DUP
- bitcore.Opcode.OP_ELSE
- bitcore.Opcode.OP_EQUALVERIFY
- bitcore.Opcode.OP_HASH160
- bitcore.PrivateKey
- bitcore.Script
- bitcore.Transaction
- bitcore.Transaction.Output
- bitcore.util