View Source BitcoinLib.Transaction (BitcoinLib v0.3.0)
Based on https://learnmeabitcoin.com/technical/transaction-data#fields
Link to this section Summary
Functions
Checks if a transaction is NOT signed
Converts a bitstring into a %Transaction{}
Encodes a transaction into binary format
Converts a hex binary into a %Transaction{}
Signs a transaction and transforms it into a binary that can be sent to the network
Link to this section Functions
@spec check_if_unsigned(%BitcoinLib.Transaction{ id: term(), inputs: term(), locktime: term(), outputs: term(), version: term(), witness: term() }) :: boolean()
Checks if a transaction is NOT signed
examples
Examples
iex> %BitcoinLib.Transaction{
...> inputs: [
...> %BitcoinLib.Transaction.Input{
...> txid: "39bc5c3b33d66ce3d7852a7942331e3ec10f8ba50f225fc41fb5dfa523239a27",
...> vout: 0,
...> script_sig: [],
...> sequence: 4294967295
...> }
...> ]
...> }
...> |> BitcoinLib.Transaction.check_if_unsigned
true
@spec decode(bitstring()) :: {:ok, %BitcoinLib.Transaction{ id: term(), inputs: term(), locktime: term(), outputs: term(), version: term(), witness: term() }} | {:error, binary()}
Converts a bitstring into a %Transaction{}
examples
Examples
iex> <<0x01000000017b1eabe0209b1fe794124575ef807057c77ada2138ae4fa8d6c4de0398a14f3f0000000000ffffffff01f0ca052a010000001976a914cbc20a7664f2f69e5355aa427045bc15e7c6c77288ac00000000::680>>
...> |> BitcoinLib.Transaction.decode()
{
:ok,
%BitcoinLib.Transaction{
version: 1,
id: "c80b343d2ce2b5d829c2de9854c7c8d423c0e33bda264c40138d834aab4c0638",
inputs: [
%BitcoinLib.Transaction.Input{
txid: "3f4fa19803dec4d6a84fae3821da7ac7577080ef75451294e71f9b20e0ab1e7b",
vout: 0,
script_sig: [],
sequence: 4294967295
}
],
outputs: [
%BitcoinLib.Transaction.Output{
value: 4999990000,
script_pub_key: [
%BitcoinLib.Script.Opcodes.Stack.Dup{},
%BitcoinLib.Script.Opcodes.Crypto.Hash160{},
%BitcoinLib.Script.Opcodes.Data{value: <<0xcbc20a7664f2f69e5355aa427045bc15e7c6c772::160>>},
%BitcoinLib.Script.Opcodes.BitwiseLogic.EqualVerify{},
%BitcoinLib.Script.Opcodes.Crypto.CheckSig{script: <<0x76a914cbc20a7664f2f69e5355aa427045bc15e7c6c77288ac::200>>}
]
}
],
locktime: 0
}
}
@spec encode(%BitcoinLib.Transaction{ id: term(), inputs: term(), locktime: term(), outputs: term(), version: term(), witness: term() }) :: binary()
Encodes a transaction into binary format
based on https://medium.com/@bitaps.com/exploring-bitcoin-signing-the-p2pkh-input-b8b4d5c4809c#50a6
examples
Examples
iex> transaction = %BitcoinLib.Transaction{
...> inputs: [
...> %BitcoinLib.Transaction.Input{
...> script_sig: nil,
...> sequence: 0xFFFFFFFF,
...> txid: "5e2383defe7efcbdc9fdd6dba55da148b206617bbb49e6bb93fce7bfbb459d44",
...> vout: 1
...> }
...> ],
...> outputs: [
...> %BitcoinLib.Transaction.Output{
...> script_pub_key: [
...> %BitcoinLib.Script.Opcodes.Stack.Dup{},
...> %BitcoinLib.Script.Opcodes.Crypto.Hash160{},
...> %BitcoinLib.Script.Opcodes.Data{value: <<0xf86f0bc0a2232970ccdf4569815db500f1268361::160>>},
...> %BitcoinLib.Script.Opcodes.BitwiseLogic.EqualVerify{},
...> %BitcoinLib.Script.Opcodes.Crypto.CheckSig{}
...> ],
...> value: 129000000
...> }
...> ],
...> locktime: 0,
...> version: 1
...> }
...> BitcoinLib.Transaction.encode(transaction)
<<0x0100000001449d45bbbfe7fc93bbe649bb7b6106b248a15da5dbd6fdc9bdfc7efede83235e0100000000ffffffff014062b007000000001976a914f86f0bc0a2232970ccdf4569815db500f126836188ac00000000::680>>
@spec parse(binary()) :: {:ok, %BitcoinLib.Transaction{ id: term(), inputs: term(), locktime: term(), outputs: term(), version: term(), witness: term() }} | {:error, binary()}
Converts a hex binary into a %Transaction{}
examples
Examples
iex> "01000000017b1eabe0209b1fe794124575ef807057c77ada2138ae4fa8d6c4de0398a14f3f0000000000ffffffff01f0ca052a010000001976a914cbc20a7664f2f69e5355aa427045bc15e7c6c77288ac00000000"
...> |> BitcoinLib.Transaction.parse()
{
:ok,
%BitcoinLib.Transaction{
version: 1,
id: "c80b343d2ce2b5d829c2de9854c7c8d423c0e33bda264c40138d834aab4c0638",
inputs: [
%BitcoinLib.Transaction.Input{
txid: "3f4fa19803dec4d6a84fae3821da7ac7577080ef75451294e71f9b20e0ab1e7b",
vout: 0,
script_sig: [],
sequence: 4294967295
}
],
outputs: [
%BitcoinLib.Transaction.Output{
value: 4999990000,
script_pub_key: [
%BitcoinLib.Script.Opcodes.Stack.Dup{},
%BitcoinLib.Script.Opcodes.Crypto.Hash160{},
%BitcoinLib.Script.Opcodes.Data{value: <<0xcbc20a7664f2f69e5355aa427045bc15e7c6c772::160>>},
%BitcoinLib.Script.Opcodes.BitwiseLogic.EqualVerify{},
%BitcoinLib.Script.Opcodes.Crypto.CheckSig{script: <<0x76a914cbc20a7664f2f69e5355aa427045bc15e7c6c77288ac::200>>}
]
}
],
locktime: 0
}
}
@spec sign_and_encode( %BitcoinLib.Transaction{ id: term(), inputs: term(), locktime: term(), outputs: term(), version: term(), witness: term() }, %BitcoinLib.Key.PrivateKey{ chain_code: term(), depth: term(), fingerprint: term(), index: term(), key: term(), parent_fingerprint: term() } ) :: binary()
Signs a transaction and transforms it into a binary that can be sent to the network
examples
Examples
iex> private_key = BitcoinLib.Key.PrivateKey.from_seed_phrase(
...> "rally celery split order almost twenty ignore record legend learn chaos decade"
...> )
...> %BitcoinLib.Transaction{
...> version: 1,
...> inputs: [
...> %BitcoinLib.Transaction.Input{
...> txid: "e4c226432a9319d603b2ed1fa609bffe4cd91f89b3176a9e73b19f7891a92bb6",
...> vout: 0,
...> sequence: 0xFFFFFFFF,
...> script_sig: <<0x76A914AFC3E518577316386188AF748A816CD14CE333F288AC::200>> |> BitcoinLib.Script.parse!()
...> }
...> ],
...> outputs: [%BitcoinLib.Transaction.Output{
...> script_pub_key: <<0x76a9283265393261373463333431393661303236653839653061643561633431386366393430613361663288ac::360>> |> BitcoinLib.Script.parse!(),
...> value: 10_000}
...> ],
...> locktime: 0
...> }
...> |> BitcoinLib.Transaction.sign_and_encode(private_key)
"0100000001b62ba991789fb1739e6a17b3891fd94cfebf09a61fedb203d619932a4326c2e4000000006a47304402207d2ff650acf4bd2f413dc04ded50fbbfc315bcb0aa97636b3c4caf55333d1c6a02207590f62363b2263b3d9b65dad3cd56e840e0d61dc0feab8f7e7956831c7e5103012102702ded1cca9816fa1a94787ffc6f3ace62cd3b63164f76d227d0935a33ee48c3ffffffff0110270000000000002d76a9283265393261373463333431393661303236653839653061643561633431386366393430613361663288ac00000000"