Cross-chain atomic swaps for Bitcoin and EvoX

This project was written as an example of atomic swap between Bitcoin and EvoX networks, it's based on the code provided in https://github.com/cosmos2202/EvoX_atomic_swap.git and the article https://bcoin.io/guides/swaps.html

This is just an example, use at your own risk and keep in mind, that it does actual spend coins.

Install

git clone git@github.com:hyle-team/atomic_swap_example.git
cd swap-test
npm install

This app has bcoin listed as peer dependency. It is assumed that the user has them already installed globally:

npm install -g bcoin

...and that the NODE_PATH environment variable is set.

# generate new wallet
simplewallet --generate-new-wallet=test2 --password=12345

# launch wallet in server mode
simplewallet --wallet-file=test2 --password=12345 --rpc-bind-port=12335

Configuration

Example .conf files are provided for all four servers (node/wallet, bcoin). These examples could be copied directly to the default data directories like so:

cp conf/bcoin.conf ~/.bcoin/bcoin.conf
cp conf/bcoin-testnet-wallet.conf ~/.bcoin/testnet/wallet.conf

The app is hard-coded for testnet and specific non-default port numbers so be sure to configure correctly!

http ports:

bcoin node:   18332 # default for testnet
bcoin wallet: 18334 # default for testnet

Launching nodes

This should work with any type of node (Full, Pruned, or SPV). Once configuration above is complete, start both nodes:

bcoin --spv --daemon

To interact with the nodes in this configuration, remember to pass the port number:


bcoin-cli --http-port=18032 --api-key=api-key info

Testing

App

This is merely a proof-of-concept and should not be used in production without modifications to the security and pirvacy of the protocol. Pull requests are welcome!

Alice has Bitcoin and wants EvoX. Bob has EvoX and wants Bitcoin. Both parties presented ad two instances of class SwapBundle. Before actuall(simulated) deal Alice and Bob negotiated and agreed on conditions, and sharing between each other following information:

Alice's Secret hash
Amount of BTC traded,
Amount of EvoX traded,
Bob's Bitcoin PublicKey,
Alice's Bitcoin PublicKey,
Alice's EvoX Address,
TimeLock for BTC,
Timelock for EvoX

Typical run of script looks like that:

Secrete.hash: dba33feaed1e37a8e15f12caa122122bb034bbdf246f64f0a4e50578929b440c
[prepare_htlc_watchonly_address] BTC watch-only wallet created:
[prepare_htlc_watchonly_address]: Prepared with BTC P2SH address:
 2NGBpJkpmbPANbRGD4oSNhgkZZJQFpABJ7r
[ALICE]: CREATING HTLC IN BTC NTEWORK FOR BOB....
[createHTLC]: BTC P2SH address:
 2NGBpJkpmbPANbRGD4oSNhgkZZJQFpABJ7r
BTC funding TX sent:
 8745f5364619d73b954319e1d6257e53c843877d05e1b044852a4f948e47edf3
[ALICE]: CREATED, txid:"8745f5364619d73b954319e1d6257e53c843877d05e1b044852a4f948e47edf3"
[BOB]: CHECKING BTC HTLC CONFIRMED....
[check_htlc_proposed]: Detected transaction: 8745f5364619d73b954319e1d6257e53c843877d05e1b044852a4f948e47edf3
[check_htlc_proposed]: Detected funding output: 0
[BOB]: CONFIRMED(8745f5364619d73b954319e1d6257e53c843877d05e1b044852a4f948e47edf3)
[BOB]: CREATING HTLC IN EvoX NTEWORK FOR ALICE.....
[BOB]: CREATED, txid: "0f1c2600ef8656a48db809062a1080f41eb395a33cef66fd56f2e271ff57e357"
[ALICE]: CHECKING EvoX HTLC CONFIRMED....
Sleeping...0
.......
Sleeping...45
[ALICE]: CONFIRMED: txid0f1c2600ef8656a48db809062a1080f41eb395a33cef66fd56f2e271ff57e357
[ALICE]: REDEEM EvoX HTLC...
[ALICE]: REDEEM RESULT: txidb8a8ecf857b9c50b4956bf7fdceeb0917e8404d2818fe7b07a955c7a90c2aaae
[BOB]: CHECK IS EvoX HTLC REDEEMED....
Sleeping...0
......
Sleeping...48
[BOB]: CHECK IS EvoX HTLC REDEEMED. txid: b8a8ecf857b9c50b4956bf7fdceeb0917e8404d2818fe7b07a955c7a90c2aaae
[BOB]: REDEEMING BTC HTLC.....
(node:17068) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
(Use `node --trace-deprecation ...` to show where the warning was created)
[redeem_htlc] BTC: swap-sweep address:
 mymfyer7a1EWgwZNy4NLo2Wthv48wN5PW3
[redeem_htlc] BTC: swap-sweep TX:
 1e1a670e4369ab08caf0809b9dbe2f6a5bcb07c50e2dd41b01414539de960b4d
BTC broadcasting swepp TX:  {success: true}
[BOB]: DONE

cosmos2202 / EvoX_atomic_swap