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https://github.com/RiverFinancial/bitcoinex

Bitcoin utilities in Elixir
https://github.com/RiverFinancial/bitcoinex

Last synced: about 6 hours ago
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Bitcoin utilities in Elixir

Host: GitHub
URL: https://github.com/RiverFinancial/bitcoinex
Owner: RiverFinancial
License: unlicense
Created: 2019-05-23T03:16:36.000Z (over 5 years ago)
Default Branch: master
Last Pushed: 2024-10-15T15:51:06.000Z (20 days ago)
Last Synced: 2024-10-16T20:07:28.361Z (19 days ago)
Language: Elixir
Size: 453 KB
Stars: 61
Watchers: 10
Forks: 18
Open Issues: 19
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Security: SECURITY.md

Awesome Lists containing this project

fucking-awesome-elixir - bitcoinex - Bitcoin utilities in Elixir. (Text and Numbers)
awesome-elixir - bitcoinex - Bitcoin utilities in Elixir. (Text and Numbers)

README

![Bitcoinex](https://user-images.githubusercontent.com/8378656/102842648-4f671380-43bc-11eb-8e0d-72c2a107e5ed.png)
# Bitcoinex

Bitcoinex is striving to be the best and most up-to-date Bitcoin Library for Elixir.

## Documentation
Documentation is available on [hexdocs.pm](https://hexdocs.pm/bitcoinex/api-reference.html).

## Current Utilities
* Serialization and validation for Bech32 and Base58.
* Support for standard on-chain scripts (P2PKH..P2WPKH) and Bolt#11 Lightning Invoices.
* Transaction serialization.
* Basic PSBT (BIP174) parsing.

## Usage

With [Hex](https://hex.pm/packages/bitcoinex):

{:bitcoinex, "~> 0.1.7"}

Local:

$ mix deps.get
$ mix compile

## Examples

Decode a Lightning Network invoice:

```elixir
Bitcoinex.LightningNetwork.decode_invoice("lnbc2500u1pvjluezpp5qqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqypqdq5xysxxatsyp3k7enxv4jsxqzpuaztrnwngzn3kdzw5hydlzf03qdgm2hdq27cqv3agm2awhz5se903vruatfhq77w3ls4evs3ch9zw97j25emudupq63nyw24cg27h2rspfj9srp")

{:ok,
%Bitcoinex.LightningNetwork.Invoice{
amount_msat: 250000000,
description: "1 cup coffee",
description_hash: nil,
destination: "03e7156ae33b0a208d0744199163177e909e80176e55d97a2f221ede0f934dd9ad",
expiry: 60,
fallback_address: nil,
min_final_cltv_expiry: 18,
network: :mainnet,
payment_hash: "0001020304050607080900010203040506070809000102030405060708090102",
route_hints: [],
timestamp: 1496314658
}}
```

Parse a BIP-174 Partially Signed Bitcoin Transaction:

```elixir
Bitcoinex.PSBT.decode("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")

{:ok,
%Bitcoinex.PSBT{
global: %Bitcoinex.PSBT.Global{
proprietary: nil,
unsigned_tx: %Bitcoinex.Transaction{...},
inputs: [
%Bitcoinex.PSBT.In{
bip32_derivation: [
%{
derivation: "b4a6ba67000000800000008004000080",
public_key: "03b1341ccba7683b6af4f1238cd6e97e7167d569fac47f1e48d47541844355bd46"
},
%{
derivation: "b4a6ba67000000800000008005000080",
public_key: "03de55d1e1dac805e3f8a58c1fbf9b94c02f3dbaafe127fefca4995f26f82083bd"
}
],
final_scriptsig: nil,
final_scriptwitness: nil,
non_witness_utxo: nil,
partial_sig: %{
public_key: "03b1341ccba7683b6af4f1238cd6e97e7167d569fac47f1e48d47541844355bd46",
signature: "304302200424b58effaaa694e1559ea5c93bbfd4a89064224055cdf070b6771469442d07021f5c8eb0fea6516d60b8acb33ad64ede60e8785bfb3aa94b99bdf86151db9a9a01"
},
por_commitment: nil,
proprietary: nil,
redeem_script: "0020771fd18ad459666dd49f3d564e3dbc42f4c84774e360ada16816a8ed488d5681",
sighash_type: nil,
witness_script: "522103b1341ccba7683b6af4f1238cd6e97e7167d569fac47f1e48d47541844355bd462103de55d1e1dac805e3f8a58c1fbf9b94c02f3dbaafe127fefca4995f26f82083bd52ae",
witness_utxo: %Bitcoinex.Transaction.Out{
script_pub_key: "a9146345200f68d189e1adc0df1c4d16ea8f14c0dbeb87",
value: 199909013
}
}
],
outputs: []
}}
```

Handle bitcoin addresses:

```elixir
{:ok, {:mainnet, witness_version, witness_program}} = Bitcoinex.Segwit.decode_address("bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4")

Bitcoinex.Segwit.encode_address(:mainnet, witness_version, witness_program)

{:ok, "bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4"}
```

# Decoding a PSBT

We have a simple script for decoding a PSBT to view the inputs and outputs. Once you've installed elixir, erlang, and the mix dependencies, you can run the command below:

```bash
mix run scripts/decode_psbt.exs
```

## Roadmap
Continued support for on-chain and off-chain functionality including:
* Full script support including validation.
* Block serialization.
* Transaction creation.
* Broader BIP support including BIP32.

## Contributing
We have big goals and this library is still in a very early stage. Contributions and comments are very much welcome.

## DISCLAIMER

This software is not recommended for use in handling real funds. The addresses, public keys, and signatures generated by this library are not recommended to be used for sending or receiving real funds.