Service that will swap rbtc for btc and then initiated a loopin through lnd-loop

Code

• https://github.com/grmkris/marduk-admin-frontend
• https://github.com/grmkris/marduk-admin-backend

RSK balances

• https://wiki.sovryn.app/en/technical-documents/mainnet-contract-addresses

TODO

• 2fa authenticator
• write operations (update balancer configuration, update&restart boltz??)
• dockerization
• add more docs
• add more tests

Swagger UI

• https://localhost:18080/swagger-ui/
• type: thisisunsafe

Description

This service main purpose is to be a "balancing" tool for lnsov bridge.
The lnsov bridge is an exchange that offers rbtc / lightning swaps. It should maintain ~50% of funds in lightning wallet and 50% funds in rsk wallet.
It uses lightning loop service to do either:

• loop in
  • when lightning balance falls below X%
    1. this service sends funds from rsk wallet to RSK federation address
    2. after 100 confirmations RSK federation address sends funds to "rsk-paired" bitcoin wallet
    3. this service is monitoring "rsk-paried" bitcoin address for new transactions
    4. after new transaction is found it sends it to lightning wallet
    5. after funds arrive to lightning wallet it initiates a loop in
• loop out
  • when RBTC balance falls below X%
    1. this service initiates a loop out
    2. loop out service sends funds to our lightning wallet
       • it is possible to loop out to specific bitcoin address, so by modfying step1, we might skip straight to step4 and save 1 onchain transaction
    3. this service monitors loop service for loop SWAP status,
    4. when swap status=COMPLETE it sends onchain transaction to "rsk-paired" bitcoin wallet
    5. this service sends coins from "rsk-paired" wallet to RSK-Federation address
    6. after 100 confirmations funds are available in RSK wallet

Before running

1. unlock lnd wallet you are connecting to (lncli unlock)
2. load new account to bitcoind
   • bitcoin-cli -chain=test -rpcpassword=password -rpcuser=rpcuser createwallet boltz-testnet-btc-wallet
   • bitcoin-cli -chain=test -rpcpassword=password -rpcuser=rpcuser loadwallet boltz-testnet-btc-wallet Verify by:
     • bitcoin-cli -chain=test -rpcpassword=qqqwwweeerrrtttooo -rpcuser=kristjan1234 listwallets
       • ["boltz-testnet-btc-wallet"]
3. start loop client -eg: ./loopd --network=testnet --lnd.macaroonpath=/var/lib/docker/volumes/bitcoind-lnd_bitcoin/_data/data/chain/bitcoin/testnet/admin.macaroon --lnd.tlspath=/var/lib/docker/volumes/bitcoind-lnd_bitcoin/_data/tls.cert --tlsextraip=185.217.125.196 --restlisten=185.217.125.196:8081
   1. Java stuff
      1. make sure you have java11, then run mvn package -Dmaven.test.skip=true
      2. go to cd target
      3. start with java jar btc-rbtc-swapper-0.0.1-SNAPSHOT.jar -DRSK_SERVICE_URL=URL etc... etc. example:

          java \
          -DRSK_BRIDGE_ADDRESS=some_value \
          -DRSK_WALLET_PRIVATE_KEY=some_value \
          -DRSK_WALLET_PUBLIC_KEY=some_value \
          -DRSK_SERVICE_URL=https://public-node.testnet.rsk.co \
          -DBTC_SERVICE_URL=some_value \
          -DBTC_RPC_COOKIE=some_value \
          -DLND_WALLET_ADDRESS= \
          -DLND_LOOP_URL=some_value \
          -DLND_LOOP_ADMIN_MACAROON=some_value \
          -DBTC_WALLET_PRIVATE_KEY=some_value \
          -DBTC_WALLET_PUBLIC_KEY=some_value \
          -DLND_ADMIN_MACAROON=some_value \
          -DLND_URL=some_value \
          -jar target/btc-rbtc-swapper-0.0.1-SNAPSHOT.jar

This service requires access to the following information:

# RSK NODE URL FOR MONITORING RSK CHAIN AND SENDING TRANSACTIONS
rsk.service.url=${RSK_SERVICE_URL}
# RSK WALLET PUBLIC ADDRESS FOR MONITORING BALANCE AND CHECKING FOR NEW TRANSACTIONS
rsk.wallet.public.key=${RSK_WALLET_PUBLIC_KEY}
# RSK WALLET PRIVATE KEY FOR SENDING TRANSACTIONS TO RSK-BRIDGE-CONTRACT
rsk.wallet.private.key=${RSK_WALLET_PRIVATE_KEY}

# RSK BRIDGE CONTRACT FOR COINS TO BE SENT TO
# mainnet RSK Bridge Contract address: 0x0000000000000000000000000000000001000006
# https://developers.rsk.co/rsk/rbtc/conversion/networks/mainnet/
# testnet 0x0000000000000000000000000000000001000006
# https://developers.rsk.co/rsk/rbtc/conversion/networks/testnet/
rsk.bridge.address=${RSK_BRIDGE_ADDRESS} 

# BITCOIN NODE URL FOR MONITORING BTC CHAIN AND SENDING TRANSACTIONS
btc.service.url=${BTC_SERVICE_URL}
# USER/PW OR COOKIE VALUE FOR COMMUNICATION WITH BITCOIN NODE
btc.rpc.cookie=${$BTC_RPC_COOKIE}
# BITCOIN WALLET PUBLIC ADDRESS FOR MONITORING FOR NEW TRANSACTIONS
# IT SHOULD BE DERIVED FROM RSK_PUBLIC_KEY
# https://github.com/rsksmart/utils
# https://developers.rsk.co/rsk/rbtc/conversion/networks/mainnet/
btc.wallet.public.key=${RSK_WALLET_PUBLIC_KEY}
btc.wallet.private.key=${RSK_WALLET_PRIVATE_KEY}

# LIGHTNING WALLET ONCHAIN ADDRESS TO SEND FUNDS BEFORE LOOP IN
lnd.wallet.address=${LND_WALLET_ADDRESS}

# LND LOOP HTTP API ENDPOINT FOR INITIAING LOOPIN/LOOPOUT
lnd.loop.url=${LND_LOOP_URL}
# ADMIN MACAROON GENERATED BY LOOP CLIENT, IN HEX VALUE
# COMMAND: xxd -p -c2000 ~/.loop/testnet/loop.macaroon
# https://github.com/lightningnetwork/lnd/issues/2951
lnd.loop.admin.macaroon=${LND_LOOP_ADMIN_MACAROON}

Helpful information

RSK

• https://blockchain.oodles.io/dev-blog/implementing-ethereum-listener-for-listening-transactions/
• http://docs.web3j.io/4.8.7/advanced/filters_and_events/
• https://www.baeldung.com/web3j

BTC

• https://bitcoinj.org/working-with-the-wallet#learning-about-changes
• https://bitcoin.stackexchange.com/questions/70063/how-do-i-parse-the-zeromq-messages-in-java

Multiple databases:

• https://www.baeldung.com/spring-data-jpa-multiple-databases ReadOnly access:
• https://www.baeldung.com/spring-data-read-only-repository Sqlite3:
• https://www.baeldung.com/spring-boot-sqlite

testtest