https://github.com/makevoid/bitcore-lib-tutorial

Bitcoin Private Key Generation and Transaction Creation and Submission tutorial using bitcore-lib
https://github.com/makevoid/bitcore-lib-tutorial

bitcoin bitcoin-sample-code bitcoin-transaction bitcoin-transaction-example bitcore bitcore-lib blockchain blockchain-bitcoin crypto example learn-bitcoin learn-blockchain sample-code study-bitcoin tutorial utxo

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Bitcoin Private Key Generation and Transaction Creation and Submission tutorial using bitcore-lib

• Host: GitHub
• URL: https://github.com/makevoid/bitcore-lib-tutorial
• Owner: makevoid
• Created: 2020-03-16T15:28:20.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2022-02-13T23:45:40.000Z (almost 3 years ago)
• Last Synced: 2024-04-08T16:25:15.302Z (9 months ago)
• Topics: bitcoin, bitcoin-sample-code, bitcoin-transaction, bitcoin-transaction-example, bitcore, bitcore-lib, blockchain, blockchain-bitcoin, crypto, example, learn-bitcoin, learn-blockchain, sample-code, study-bitcoin, tutorial, utxo
• Language: JavaScript
• Homepage:
• Size: 1.38 MB
• Stars: 7
• Watchers: 3
• Forks: 4
• Open Issues: 6
• Metadata Files:
  • Readme: Readme.md

Awesome Lists containing this project

README

        
### bitcore-lib-tutorial

This sameple code will let you generate a private key, create a transaction and submit it via with bitcore-lib and Javascript

---

Creating a private key and sending a bitcoin transaction in 30 lines of code

- run `node create-key.js` to create a new private key (saved by the script in `private-key.txt`)

- fund the account with 1 millibit or less

- run `node index.js` (by default it will create and submit a transaction paying 0.1 btc to the same address)

The code is the following:

```js

const { readFileSync } = require('fs')

const bitcoin = require('bitcore-lib')

const { PrivateKey, Transaction } = bitcoin

const pvtKeyString = readFileSync('./private-key.txt').toString().trim()

const pvtKey = new PrivateKey(pvtKeyString)

const address = pvtKey.toAddress().toString()

console.log("private key:", pvtKey.toString())

console.log("address:", address)

const getUTXOs  = require('./blockchain-api/get-utxos')

const pushTx    = require('./blockchain-api/push-tx')

// const { pushTx, getUTXOs } = require('./blockchain-api') // TODO: NPM MODULE

;(async () => {

  try {

    let utxos = await getUTXOs({ address })

    utxos = [ utxos[0] ]

    console.log("utxos:", utxos)

    const amount = 10000 // 10k sats (0.1mbtc)

    const tx = new Transaction()

      .from(utxos)

      .to(address, amount)

      .change(address)

      .fee(1000)

      .sign(pvtKey)

    const txHex = tx.serialize()

    console.log("tx:", txHex)

    const { success, txHash } = pushTx(txHex)

    console.log("success:", success, "txHash:", txHash)

  } catch (err) {

    console.error(err)

  }

})()

```

Creating a private key and sending a bitcoin transaction in 30 lines of code -  #coding #bitcoin #tx #utxo #bitcoin-tx #bitcoin-utxo

---

notes about js JS bitcoin libraries:

`bitcore-lib.js` (purely didatical version - [this version])

`bitcoinjs-lib.js` (TODO: create a more practical version using bitcoinjs-lib or a wrapper)

---

@makevoid