Topic: [ANN] BitcoinS: A Bitcoin node in Scala (Read 160 times)
RESERVED
RESERVED
RESERVED
Announcing BitcoinS, a Bitcoin library written in Scala.
It is fully functional SPV node and work is in progress to make a full node. It is build from the ground up, including the ECC.
Link: https://github.com/scalahub/bitcoinS
The code was motivated from BitcoinJ, a Java client.
Special thanks to Arubi from #bitcoin-dev (Freenode) for providing several test vectors and guidance.
What is supported?
What is planned or work in progress?
Feel free to fork it. It is MIT license.
For examples, see the test vectors and test cases here:
https://github.com/scalahub/bitcoinS/tree/master/BitcoinS_Tests/src/sh
Below is an example of creating SegWit transaction using this library:
(borrowed from https://github.com/scalahub/bitcoinS/blob/master/BitcoinS_Tests/src/sh/TestTx.scala)
val key = new ECCPrvKey("BB2AC60BC518C0E239D5AF9D8D051A6BDFD0D931268DCA70C59E5992", true) // random key
val p2wpkh_key = new PrvKey_P2SH_P2WPKH(key.bigInt, false) // mainnet is false
val p2sh_key = new PrvKey_P2SH_P2PK(key, false) // mainnet is false
val p2pkh_key = new PrvKey_P2PKH(key, false) // mainnet is false
assert(p2wpkh_key.pubKey.address == "2N6nA4btbY23GTQ4RJi3mMGTonzXN7dbphE") // (segwit)
assert(p2sh_key.pubKey.address == "2MwprvB9tUMtX4vK8zJK8K329fNu79CJgR7") // (p2sh)
assert(p2pkh_key.pubKey.address == "muLwLjVipwixXcECVMcEwgsrtfGRTB4zB1") // (p2pkh)
// Send some coins to the above addresses. During testing, the following coins were used:
val in0 = TxIn("0224c8875a43c482c81a508fafc10bd0f084b27b5543c228e48431985f321547", 0) // p2pkh
val in1 = TxIn("63bec90405a0c173ae928860a1e1d403e507ec225e2cdd07717c8408820d418b", 0) // segwit // 2031250 satoshis
val in2 = TxIn("db5a23f0da2502b8ef82d93453aa3be0b6e9a3ecfbfbc00818dc32b3c712d2d0", 0) // p2pkh
val in3 = TxIn("6d73e3c8f66869859dc5c1ba73f252b8db51950ebc1fc4a59dca3552a0085f9a", 0) // p2sh
val in4 = TxIn("6ce466eb0920f84cc2cfde1d359176c0baab7dc442e4e5763bf67e8fa96ee6a4", 0) // p2sh
val in5 = TxIn("b49f3d6d15f2bdd9217ba3caaf1bb1f2d9875c9657e6b0ac7a0ef841d486ad1d", 2) // p2pkh
val in6 = TxIn("b75dfb27477834b3060c8e956273bef81c62689a8b9ebb7cd4a8119508c2c798", 0) // segwit // 1015625 satoshis
// the following output was created
// Note 2N8hwP1WmJrFF5QWABn38y63uYLhnJYJYTF faucet address
val out1 = TxOut(Some("2N8hwP1WmJrFF5QWABn38y63uYLhnJYJYTF"), 32206092) // total amount is slightly more than 32206092
val tx0 = createTxRaw(Seq(in0,in1,in2,in3,in4,in5,in6), Seq(out1)) // unsigned tx
val tx1 = p2pkh_key.signTx_P2PKH (tx0, Seq(0, 2, 5)) // inputs 0, 2, 5 are P2PKH
val tx2 = p2wpkh_key.signTx(tx1, Seq((1, 2031250), (6, 1015625))) // inputs 1, 6 are segwit.
// SegWit signatures need the input value in satoshis as well
val signed = p2sh_key.signTx_P2SH_P2PK(tx2, Seq(3, 4)) // inputs 3, 4 are P2SH_P2PK
// above is a byte array encoding the raw Tx
val parsed = new TxParser(signed).getTx // creates a Tx object
We would appreciate feedback so please let us know what more can be added to make it useful.
If interested in collaborating, please reply here.
It is fully functional SPV node and work is in progress to make a full node. It is build from the ground up, including the ECC.
Link: https://github.com/scalahub/bitcoinS
The code was motivated from BitcoinJ, a Java client.
Special thanks to Arubi from #bitcoin-dev (Freenode) for providing several test vectors and guidance.
What is supported?
- SegWit enabled (P2SH-P2WPKH)
- P2SH-P2PK
- P2PKH
- SPV (Merkle Blocks, Bloom filters)
- Most network commands in Bitcoin protocol
- Bitcoind RPC
- Bitcoind Blockchain database parser (reuse bitcoind chain)
- BitcoinCash (BCH) signing and node connectivity
What is planned or work in progress?
- Bitcoin Bech32 address
- BitcoinCash CashAddr (bech32)
- Consensus rules and chain validation
- ZCash t-address support
- BitcoinGold (if enough demand)
Feel free to fork it. It is MIT license.
For examples, see the test vectors and test cases here:
https://github.com/scalahub/bitcoinS/tree/master/BitcoinS_Tests/src/sh
Below is an example of creating SegWit transaction using this library:
(borrowed from https://github.com/scalahub/bitcoinS/blob/master/BitcoinS_Tests/src/sh/TestTx.scala)
Code:
val key = new ECCPrvKey("BB2AC60BC518C0E239D5AF9D8D051A6BDFD0D931268DCA70C59E5992", true) // random key
val p2wpkh_key = new PrvKey_P2SH_P2WPKH(key.bigInt, false) // mainnet is false
val p2sh_key = new PrvKey_P2SH_P2PK(key, false) // mainnet is false
val p2pkh_key = new PrvKey_P2PKH(key, false) // mainnet is false
assert(p2wpkh_key.pubKey.address == "2N6nA4btbY23GTQ4RJi3mMGTonzXN7dbphE") // (segwit)
assert(p2sh_key.pubKey.address == "2MwprvB9tUMtX4vK8zJK8K329fNu79CJgR7") // (p2sh)
assert(p2pkh_key.pubKey.address == "muLwLjVipwixXcECVMcEwgsrtfGRTB4zB1") // (p2pkh)
// Send some coins to the above addresses. During testing, the following coins were used:
val in0 = TxIn("0224c8875a43c482c81a508fafc10bd0f084b27b5543c228e48431985f321547", 0) // p2pkh
val in1 = TxIn("63bec90405a0c173ae928860a1e1d403e507ec225e2cdd07717c8408820d418b", 0) // segwit // 2031250 satoshis
val in2 = TxIn("db5a23f0da2502b8ef82d93453aa3be0b6e9a3ecfbfbc00818dc32b3c712d2d0", 0) // p2pkh
val in3 = TxIn("6d73e3c8f66869859dc5c1ba73f252b8db51950ebc1fc4a59dca3552a0085f9a", 0) // p2sh
val in4 = TxIn("6ce466eb0920f84cc2cfde1d359176c0baab7dc442e4e5763bf67e8fa96ee6a4", 0) // p2sh
val in5 = TxIn("b49f3d6d15f2bdd9217ba3caaf1bb1f2d9875c9657e6b0ac7a0ef841d486ad1d", 2) // p2pkh
val in6 = TxIn("b75dfb27477834b3060c8e956273bef81c62689a8b9ebb7cd4a8119508c2c798", 0) // segwit // 1015625 satoshis
// the following output was created
// Note 2N8hwP1WmJrFF5QWABn38y63uYLhnJYJYTF faucet address
val out1 = TxOut(Some("2N8hwP1WmJrFF5QWABn38y63uYLhnJYJYTF"), 32206092) // total amount is slightly more than 32206092
val tx0 = createTxRaw(Seq(in0,in1,in2,in3,in4,in5,in6), Seq(out1)) // unsigned tx
val tx1 = p2pkh_key.signTx_P2PKH (tx0, Seq(0, 2, 5)) // inputs 0, 2, 5 are P2PKH
val tx2 = p2wpkh_key.signTx(tx1, Seq((1, 2031250), (6, 1015625))) // inputs 1, 6 are segwit.
// SegWit signatures need the input value in satoshis as well
val signed = p2sh_key.signTx_P2SH_P2PK(tx2, Seq(3, 4)) // inputs 3, 4 are P2SH_P2PK
// above is a byte array encoding the raw Tx
val parsed = new TxParser(signed).getTx // creates a Tx object
We would appreciate feedback so please let us know what more can be added to make it useful.
If interested in collaborating, please reply here.
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