Preliminary JS example of sending a witness-based Budget transaction

output.txt

mvines@sol:~/ws/solana-web3.js/examples$ node pay-after-signature.js 

== Account State
Account1: 9cyS7zidau1ZzJxK7iDcYRuRwkDVVSv4NQdGW9oWTnRr has a balance of 0
Account2: H8csfHmybstxv5RjGdBCHNugVkz9aaSPry3pn4zdr3jW has a balance of 0
TempContract: 7eWzYdZTfQyvs6aSMUMU4DHpGUhe9umom1qMmtbXwCWn has a balance of 0
Contract: 1Tdg7BoqsWJFaFjucA5fsj18esh7kSREv4odmdUxN7E has a balance of 0

== Requesting airdrop of 100 to 9cyS7zidau1ZzJxK7iDcYRuRwkDVVSv4NQdGW9oWTnRr
Confirming transaction: FksKGyryYAhUsFd8R5868xRgAKHMgVnHUGXbJMb5tLic6WRpQmn6JYAWYL2k9vUy68ut3NsxyHBgeZazU6sqFqt
Transaction confirmed

== Account State
Account1: 9cyS7zidau1ZzJxK7iDcYRuRwkDVVSv4NQdGW9oWTnRr has a balance of 100
Account2: H8csfHmybstxv5RjGdBCHNugVkz9aaSPry3pn4zdr3jW has a balance of 0
TempContract: 7eWzYdZTfQyvs6aSMUMU4DHpGUhe9umom1qMmtbXwCWn has a balance of 0
Contract: 1Tdg7BoqsWJFaFjucA5fsj18esh7kSREv4odmdUxN7E has a balance of 0

== Moving 100 to H8csfHmybstxv5RjGdBCHNugVkz9aaSPry3pn4zdr3jW
Confirming transaction: 2DUsDAsZE1syFLHm77ce2T9NdaxgJXuR81brJGYugpR1JsETCXsLTqzzjkCYToDEzbrKViLZbXLyTaC3VpofTW9y
Transaction confirmed

== Account State
Account1: 9cyS7zidau1ZzJxK7iDcYRuRwkDVVSv4NQdGW9oWTnRr has a balance of 50
Account2: H8csfHmybstxv5RjGdBCHNugVkz9aaSPry3pn4zdr3jW has a balance of 0
TempContract: 7eWzYdZTfQyvs6aSMUMU4DHpGUhe9umom1qMmtbXwCWn has a balance of 50
Contract: 1Tdg7BoqsWJFaFjucA5fsj18esh7kSREv4odmdUxN7E has a balance of 0

== Assigning 7eWzYdZTfQyvs6aSMUMU4DHpGUhe9umom1qMmtbXwCWn to BudgetContract
Confirming transaction: 3Ta2pwsp87gmLh3bRSrMyxSL9fV2Fpu7SUNXMxGaRGQhWEFnvxs4GQfZj6XqC4mMRC8CiP3HTeQB8rbzmbgjbQgc
Transaction confirmed

== Account State
Account1: 9cyS7zidau1ZzJxK7iDcYRuRwkDVVSv4NQdGW9oWTnRr has a balance of 50
Account2: H8csfHmybstxv5RjGdBCHNugVkz9aaSPry3pn4zdr3jW has a balance of 0
TempContract: 7eWzYdZTfQyvs6aSMUMU4DHpGUhe9umom1qMmtbXwCWn has a balance of 50
Contract: 1Tdg7BoqsWJFaFjucA5fsj18esh7kSREv4odmdUxN7E has a balance of 0

== Creating contract
Confirming transaction: 3JZmjtn7cM84pe9Az43yirt4DEPGGwhEarkJgiBpt4tbps1umWSjpYKq48BuTD6DFM1PwcfKbV6HvHJw7xzXQEiJ
Transaction confirmed

== Account State
Account1: 9cyS7zidau1ZzJxK7iDcYRuRwkDVVSv4NQdGW9oWTnRr has a balance of 49
Account2: H8csfHmybstxv5RjGdBCHNugVkz9aaSPry3pn4zdr3jW has a balance of 0
TempContract: 7eWzYdZTfQyvs6aSMUMU4DHpGUhe9umom1qMmtbXwCWn has a balance of 50
Contract: 1Tdg7BoqsWJFaFjucA5fsj18esh7kSREv4odmdUxN7E has a balance of 1

== Initializing contract
Confirming transaction: 2dWFy9HN8ZfqucDuUXVqK5817DMMPpDgNX6po2Mh8zyeCt5qw3C82nmCYjGEERmCKKqjioyUZAXepRq5GuGxeQfH
Transaction confirmed

== Account State
Account1: 9cyS7zidau1ZzJxK7iDcYRuRwkDVVSv4NQdGW9oWTnRr has a balance of 49
Account2: H8csfHmybstxv5RjGdBCHNugVkz9aaSPry3pn4zdr3jW has a balance of 0
TempContract: 7eWzYdZTfQyvs6aSMUMU4DHpGUhe9umom1qMmtbXwCWn has a balance of 0
Contract: 1Tdg7BoqsWJFaFjucA5fsj18esh7kSREv4odmdUxN7E has a balance of 51

== Witness contract
Confirming transaction: 25GcVPNFJ8X7bwCTuS6PkNm1PEYGyvjeQUaFZxJyuCzEYK2zcT9MYJLachqswgQ4iBds1XQRJ2ZLXZrTwWjXo3mz
Transaction confirmed

== Account State
Account1: 9cyS7zidau1ZzJxK7iDcYRuRwkDVVSv4NQdGW9oWTnRr has a balance of 49
Account2: H8csfHmybstxv5RjGdBCHNugVkz9aaSPry3pn4zdr3jW has a balance of 50
TempContract: 7eWzYdZTfQyvs6aSMUMU4DHpGUhe9umom1qMmtbXwCWn has a balance of 0
Contract: 1Tdg7BoqsWJFaFjucA5fsj18esh7kSREv4odmdUxN7E has a balance of 1

Done

pay-after-signature.js

//eslint-disable-next-line import/no-commonjs
const solanaWeb3 = require('..');
//const solanaWeb3 = require('@solana/web3.js');

const account1 = new solanaWeb3.Account();
const account2 = new solanaWeb3.Account();
const tempcontract = new solanaWeb3.Account();
const contract = new solanaWeb3.Account();
const amount = 100;

const connection = new solanaWeb3.Connection('http://localhost:8899');

function showBalance() {
  console.log(`\n== Account State`);
  return Promise.all([
    connection.getBalance(account1.publicKey),
    connection.getBalance(account2.publicKey),
    connection.getBalance(tempcontract.publicKey),
    connection.getBalance(contract.publicKey),
  ]).then(([fromBalance, toBalance, tempcontractBalance, contractBalance]) => {
    console.log(`Account1: ${account1.publicKey} has a balance of ${fromBalance}`);
    console.log(`Account2: ${account2.publicKey} has a balance of ${toBalance}`);
    console.log(`TempContract: ${tempcontract.publicKey} has a balance of ${tempcontractBalance}`);
    console.log(`Contract: ${contract.publicKey} has a balance of ${contractBalance}`);
  });
}

function confirmTransaction(signature) {
  console.log('Confirming transaction:', signature);
  return connection.confirmTransaction(signature)
  .then((confirmation) => {
    if (!confirmation) {
      throw new Error('Transaction was not confirmed');
    }
    console.log('Transaction confirmed');
  });
}

function airDrop() {
  console.log(`\n== Requesting airdrop of ${amount} to ${account1.publicKey}`);
  return connection.requestAirdrop(account1.publicKey, amount)
  .then(confirmTransaction);
}

showBalance()
.then(airDrop)
.then(showBalance)
.then(() => {
  console.log(`\n== Moving ${amount} to ${account2.publicKey}`);
  const transaction = solanaWeb3.SystemContract.move(
    account1.publicKey,
    tempcontract.publicKey,
    amount / 2,
  );
  return connection.sendTransaction(account1, transaction);
})
.then(confirmTransaction)
.then(showBalance)
.then(() => {
  console.log(`\n== Assigning ${tempcontract.publicKey} to BudgetContract`);
  const transaction = solanaWeb3.SystemContract.assign(
    tempcontract.publicKey,
    solanaWeb3.BudgetContract.contractId,
  );
  return connection.sendTransaction(tempcontract, transaction);
})
.then(confirmTransaction)
.then(showBalance)
.then(() => {
  console.log(`\n== Creating contract`);
  const transaction = solanaWeb3.SystemContract.createAccount(
    account1.publicKey,
    contract.publicKey,
    1,
    solanaWeb3.BudgetContract.space,
    solanaWeb3.BudgetContract.contractId,
  );
  return connection.sendTransaction(account1, transaction);
})
.then(confirmTransaction)
.then(showBalance)
.then(() => {
  console.log(`\n== Initializing contract`);
  const transaction = solanaWeb3.BudgetContract.pay(
    tempcontract.publicKey,
    contract.publicKey,
    account2.publicKey,
    amount / 2,
    solanaWeb3.BudgetContract.signatureCondition(account1.publicKey),
  );
  return connection.sendTransaction(tempcontract, transaction);
})
.then(confirmTransaction)
.then(showBalance)
.then(() => {
  console.log(`\n== Witness contract`);
  const transaction = solanaWeb3.BudgetContract.applySignature(
    account1.publicKey,
    contract.publicKey,
    account2.publicKey,
  );
  return connection.sendTransaction(account1, transaction);
})
.then(confirmTransaction)
.then(showBalance)

.then(() => {
  console.log('\nDone');
})

.catch((err) => {
  console.log(err);
});