btc test

import coinSelect from 'coinselect'

import { address as Address, Network, networks, payments, Psbt, Transaction, ECPair } from 'bitcoinjs-lib'

const sigwitInputs = [
    {
        tx_hash: '2e1bc58c73574bd57a3155b1118cf942b43dc8dd9fe7786f6c8110b59c298f5d',
        block_height: 632654,
        tx_input_n: -1,
        tx_output_n: 0,
        value: 98320,
        ref_balance: 98320,
        spent: false,
        confirmations: 134,
        confirmed: '2020-06-01T21:41:00Z',
        double_spend: false,
        script: '76a91468cc0558fb58119c005bf89f320a243bc580d19988ac',
    },
]

const utxos = sigwitInputs.map(i => {
    return {
        txId: i.tx_hash,
        vout: i.tx_output_n,
        value: i.value,
        scriptPubKey: i.script,
        // redeemScript: i.redeemScript,
        // nonWitnessUtxo: Buffer.from(i.hash, 'hex'),
        witnessUtxo: {
            script: Buffer.from(i.script, 'hex'),
            value: i.value,
        },
    }
})

const utxosSum = utxos.reduce((sum, i) => sum + i.value, 0)

const targets = [
    {
        address: '3Qg2QXYAtjrKJj7fE5j9tGfRsLSVUoSGs8',
        value: 95440,
    },
]

let { inputs, outputs, fee } = coinSelect(utxos, targets, 15)

console.log({ fee, utxosSum, max: utxosSum - fee })

outputs = outputs.map(i => {
    if (!i.address) {
        i.address = '1AZ7ga5K2taigmTHrHFngb5UDj5Ej4jUgL'
    }

    return i
})

const keyPair = ECPair.fromWIF('KxzypGRWQA6CqAAwCh6R4YpPE2DHaRbLwTiaPz1RnMLZRj3mdX76', networks.bitcoin)
const a = payments.p2wpkh({ pubkey: keyPair.publicKey, network: networks.bitcoin })
const b = payments.p2sh({ redeem: a, network: networks.bitcoin })
const redeemScript = b.redeem.output.toString('hex')

console.log(b.address.toString())

console.log({ utxosSum, inputs, outputs, fee, utxos, redeemScript })

const psbt = new Psbt({ network: networks.bitcoin })
inputs.forEach(input =>
    psbt.addInput({
        hash: input.txId,
        index: input.vout,
        redeemScript: Buffer.from(redeemScript, 'hex'),
        witnessUtxo: input.witnessUtxo,
    })
)

outputs.forEach(output => {
    psbt.addOutput({
        address: output.address,
        value: output.value,
    })
})

// for (let i = 0; i < psbt.inputCount; i++) {
//     psbt.signInput(i, keyPair)
// }

psbt.signAllInputs(keyPair)
psbt.finalizeAllInputs()

console.log(psbt.extractTransaction().toHex())