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🧪 Lab

Set up development test environment, use CLI

🕣 Duration

5-10 minutes

🍽️ Description

Goal of this lab is to quickly set up Bitcoin full node and play around with CLI.
Also, to familiarize with basic entities like blocks and transactions.

Requirements

Docker

Let's start ...

- Installation

To set up personal Bitcoin blockchain we will be using new tool for Bitcoin developers: Nigiri Bitcoin.
Check out Nigiri Blog and Git Repo for more details.
If you like it don't hesitate to give it a star 🙂.

curl https://getnigiri.vulpem.com | bash

- Start Bitcoin

nigiri start

That's it 🙂. Now you have everything you need to play around with Bitcoin CLI.
After Docker starts containers, go to http://localhost:5000 to quickly inspect the Bitcoin blockchain.

- Steps to create transaction

  1. Create alias for Bitcoin CLI
alias b="docker exec -it bitcoin bitcoin-cli -datadir=/config"
  1. Show available CLI commands:
bitcoin-cli -datadir=/config help
  1. Generate new address
b getnewaddress
  1. Sent 1 BTC to address from step 3.
b sendtoaddress {ADDRESS} 1
  1. Add transaction to block
b generatetoaddress 1 $(b getnewaddress)
  1. Get transaction hex using TXID from step 4.
b gettransaction {TXID} | jq .hex
  1. Decode transaction using HEX from step 6.
b decoderawtransaction {HEX}

You should see decoded transaction, eg. bellow:

{
  "txid": "3779476c1b6c6d0401be210fe54022a7c8ce1a805e2852fddac60469d4a05e16",
  "hash": "9efd638ec5dd31332a8a59e2849661ad12a0b28f1ccd31e54928e9112831f389",
  "version": 2,
  "size": 170,
  "vsize": 143,
  "weight": 572,
  "locktime": 0,
  "vin": [
    {
      "coinbase": "01660101",
      "sequence": 4294967295
    }
  ],
  "vout": [
    {
      "value": 50.00042480,
      "n": 0,
      "scriptPubKey": {
        "asm": "OP_HASH160 439c28d00de511296b8a2cd78a74e71651a4b761 OP_EQUAL",
        "hex": "a914439c28d00de511296b8a2cd78a74e71651a4b76187",
        "reqSigs": 1,
        "type": "scripthash",
        "addresses": [
          "2MyQiLHQPYoZXvsd6psimyh2hyN7iixemQB"
        ]
      }
    },
    {
      "value": 0.00000000,
      "n": 1,
      "scriptPubKey": {
        "asm": "OP_RETURN aa21a9ed01e4e9103f42c86f105b25383c5dc16ccecb3b42779ac8a812bef25f6cb0d4b6",
        "hex": "6a24aa21a9ed01e4e9103f42c86f105b25383c5dc16ccecb3b42779ac8a812bef25f6cb0d4b6",
        "type": "nulldata"
      }
    }
  ]
}
  1. Check blocks and transaction in GUI also, http://localhost:5000

Blocks:

Transactions: