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Application Server

App server

The server project is the aggregation of these three sub projects

  1. Wallet
  2. Chain
  3. Node

The server project provides a way to access information from these three projects via a JSON RPC.

Building the server

Java binary

You can build the server with the sbt native packager. The native packager offers numerous ways to package the project.

In this example we are going to use stage which will produce bash scripts we can easily execute. You can stage the server with the following command.

sbt appServer/universal:stage

This will produce a script to execute bitcoin-s which you can start with

./app/server/target/universal/stage/bin/bitcoin-s-server

Docker

The oracle server also has docker support. You can build a docker image with the following commands

Using an existing docker image

We publish docker images on every PR that is merged to bitcoin-s.

You can find the docker repo for the app server here

Building a docker image

sbt "appServer/docker:stage"

This will build a Dockerfile that is located in app/server/target/docker/stage

You can now build the docker image with

docker build app/server/target/docker/stage/ -t bitcoinscala/bitcoin-s-server:latest

Finally, let's run the image! It's important that you correctly configure port forwarding with the docker container so you can interact with the running container with bitcoin-s-cli or curl. By default, our oracle server listens for requests on port 9999. By default, the server listens for websocket connections on port 19999 at /events.

This means we need to forward requests on the host machine to the docker container correctly.

This can be done with the following command

docker run -d -p 9999:9999 -p 19999:19999 -e BITCOIN_S_SERVER_RPC_PASSWORD='topsecret' bitcoinscala/bitcoin-s-server:latest

Now you can send requests with bitcoin-s-cli or curl. Here is an example with bitcoin-s-cli

./bitcoin-s-cli getblockcount --password topsecret
10000

For more information on build configuration options with sbt please see the sbt native packager docs

Configuration

Java binary configuration

If you would like to pass in a custom datadir for your server, you can do

./app/server/target/universal/stage/bin/bitcoin-s-server --datadir /path/to/datadir/

To use a config file that is not the bitcoin-s.conf file in your datadir, you can do

./app/server/target/universal/stage/bin/bitcoin-s-server --conf /path/to/file.conf

You can also pass in a custom rpcport to bind to

./app/server/target/universal/stage/bin/bitcoin-s-server --rpcport 12345

Or set a custom wsport to bind to

./app/server/target/universal/stage/bin/bitcoin-s-server --wsport 54321

For more information on configuring the server please see our configuration document

For more information on how to use our built in cli to interact with the server please see /docs/next/applications/cli

Docker configuration

In this example, we are using the latest docker image published to our docker hub which is referenced by bitcoinscala/bitcoin-s-server:latest

You can use bitcoin-s with docker volumes. You can also pass in a custom configuration at container runtime.

Using a docker volume

docker volume create bitcoin-s
docker run -p 9999:9999 -p 19999:19999 \
--mount source=bitcoin-s,target=/home/bitcoin-s/ bitcoinscala/bitcoin-s-server:latest

Now you can re-use this volume across container runs. It will keep the same oracle database and seeds directory located at /home/bitcoin-s/.bitcoin-s/seeds in the volume.

Using a custom bitcoin-s configuration with docker

You can also specify a custom bitcoin-s configuration at container runtime. You can mount the configuration file on the docker container and that configuration will be used in the docker container runtime rather than the default one we provide here

You can do this with the following command

docker run -p 9999:9999 -p 19999:19999 \
--mount type=bind,source=/my/new/config/,target=/home/bitcoin-s/.bitcoin-s/ \
bitcoinscala/bitcoin-s-server:latest --conf /home/bitcoin-s/.bitcoin-s/bitcoin-s.conf

Note: If you adjust the bitcoin-s.server.rpcport setting you will need to adjust the -p 9999:9999 port mapping on the docker container to adjust for this.

Server Endpoints

Common

  • getversion - The version of our application you are using
  • zipdatadir location - Backs up the datadir in a safe and consistent manner.
    • location - The locations of the backup zip

Blockchain

  • getblockcount - Get the current block height
  • getfiltercount - Get the number of filters
  • getfilterheadercount - Get the number of filter headers
  • getbestblockhash - Get the best block hash
  • getblockheader - Returns information about block header
    • hash - The block hash
  • decoderawtransaction tx - Decode the given raw hex transaction
    • tx - Transaction encoded in hex to decode
  • getmediantimepast - Returns the median time past
  • getinfo returns general information about our blockchain state

Wallet

  • rescan [options] - Rescan for wallet UTXOs
    • --force - Clears existing wallet records. Warning! Use with caution!
    • --batch-size <value> - Number of filters that can be matched in one batch
    • --start <value> - Start height
    • --end <value> - End height
    • --ignorecreationtime - Ignores the wallet creation date and will instead do a full rescan
  • isempty - Checks if the wallet contains any data
  • walletinfo - Returns data about the current wallet being used
  • getbalance [options] - Get the wallet balance
    • --sats - Display balance in satoshis
  • getconfirmedbalance [options] - Get the wallet balance of confirmed utxos
    • --sats - Display balance in satoshis
  • getunconfirmedbalance [options] - Get the wallet balance of unconfirmed utxos
    • --sats - Display balance in satoshis
  • getbalances [options] - Get the wallet balance by utxo state
    • --sats - Display balance in satoshis
  • getutxos - Returns list of all wallet utxos
  • getaddresses - Returns list of all wallet addresses currently being watched
  • getspentaddresses - Returns list of all wallet addresses that have received funds and been spent
  • getfundedaddresses - Returns list of all wallet addresses that are holding funds
  • getunusedaddresses - Returns list of all wallet addresses that have not been used
  • getaccounts - Returns list of all wallet accounts
  • walletinfo - Returns meta information about the wallet
  • createnewaccount purpose - Creates a new wallet account with the given HD purpose from BIP43
  • getaddressinfo address - Returns list of all wallet accounts
    • address - Address to get information about
  • getnewaddress - Get a new address
  • listreservedutxos - lists all utxos that are reserved in the wallet
  • sendtoaddress address amount [options] - Send money to the given address
    • address - Address to send to
    • amount - Amount to send in BTC
    • --feerate <value> - Fee rate in sats per virtual byte
  • sendfromoutpoints outpoints address amount [options] - Send money to the given address
    • outpoints - Out Points to send from
    • address - Address to send to
    • amount - Amount to send in BTC
    • --feerate <value> - Fee rate in sats per virtual byte
  • sweepwallet address [options] - Sends the entire wallet balance to the given address
    • address - Address to send to
    • --feerate <value> - Fee rate in sats per virtual byte
  • sendwithalgo address amount algo [options] - Send money to the given address using a specific coin selection algo
    • address - Address to send to
    • amount - Amount to send in BTC
    • algo - Coin selection algo
    • --feerate <value> - Fee rate in sats per virtual byte
  • signpsbt psbt - Signs the PSBT's inputs with keys that are associated with the wallet
    • psbt - PSBT to sign
  • opreturncommit message [options] - Creates OP_RETURN commitment transaction
    • message - message to put into OP_RETURN commitment
    • --hashMessage - should the message be hashed before commitment
    • --feerate <value> - Fee rate in sats per virtual byte
  • bumpfeecpfp txid feerate - Bump the fee of the given transaction id with a child tx using the given fee rate
    • txid - Id of transaction to bump fee
    • feerate - Fee rate in sats per virtual byte of the child transaction
  • bumpfeerbf txid feerate - Replace given transaction with one with the new fee rate
    • txid - Id of transaction to bump fee
    • feerate - New fee rate in sats per virtual byte
  • gettransaction txid - Get detailed information about in-wallet transaction
    • txid - The transaction id
  • lockunspent unlock transactions - Temporarily lock (unlock=false) or unlock (unlock=true) specified transaction outputs.
    • unlock - Whether to unlock (true) or lock (false) the specified transactions
    • transactions - The transaction outpoints to unlock/lock, empty to apply to all utxos
  • importseed walletname words passphrase - Imports a mnemonic seed as a new seed file
    • walletname - Name to associate with this seed
    • words - Mnemonic seed words, space separated
    • passphrase - Passphrase to encrypt this seed with
  • importxprv walletname xprv passphrase - Imports a mnemonic seed as a new seed file
    • walletname - Name to associate with this seed
    • xprv - base58 encoded extended private key
    • passphrase - Passphrase to encrypt this seed with
  • exportseed walletname passphrase - Exports the mnemonic seed phrase
    • walletname - Name to associate with this seed
    • passphrase - Passphrase to decrypt this seed with
  • markseedasbackedup walletname passphrase - Marks the seed as backed up. It prevents exportseed from returning the mnemonic phrase
    • walletname - Name to associate with this seed
    • passphrase - Passphrase to decrypt this seed with
  • getseedbackuptime walletname passphrase - Returns time when the seed was backed up
    • walletname - Name to associate with this seed
    • passphrase - Passphrase to decrypt this seed with
  • keymanagerpassphrasechange oldpassphrase newpassphrase - Changes the wallet passphrase
    • oldpassphrase - The current passphrase
    • newpassphrase - The new passphrase
  • keymanagerpassphraseset passphrase - Encrypts the wallet with the given passphrase
    • passphrase - The passphrase to encrypt the wallet with
  • loadwallet walletname passphrase - Loads a wallet
    • walletname - Name to associate with this seed
    • passphrase - Passphrase to decrypt this seed with
  • listwallets - Returns a list of all wallets

DLC

  • createcontractinfo announcement totalCollateral payouts
    • the announcement to build the contract info for
    • the total amount of collateral in the DLC
    • The payouts can be in two formats
      1. { "outcomes" : { "outcome0" : 0, "outcome1": 1, ... }}. The number is the amount of sats paid to YOU for that outcome.
      2. [{"outcome":0,"payout":0,"extraPrecision":0,"isEndpoint":true}, {"outcome":1,"payout":1,"extraPrecision":0,"isEndpoint":true}, ...]
  • decodecontractinfo contractinfo - Decodes a contract info into json
    • contractinfo - Hex encoded contract info
  • decodeoffer offer - Decodes an offer message into json
    • offer - Hex encoded dlc offer message
  • decodeaccept accept - Decodes an accept message into json
    • accept - Hex encoded dlc accept message
  • decodesign sign - Decodes a sign message into json
    • sign - Hex encoded dlc sign message
  • decodeannouncement announcement - Decodes an oracle announcement message into json
    • announcement - Hex encoded oracle announcement message
  • decodeattestments attestments - Decodes an oracle attestments message into json
    • attestments - Hex encoded oracle attestments message
  • getdlchostaddress - Returns the public listening address of the DLC Node
  • createdlcoffer contractInfo collateral [feerate] refundlocktime [options] - Creates a DLC offer that another party can accept
    • contractInfo - Hex encoded contractInfo message
    • collateral - Satoshis to fund your side of the DLC
    • feerate - Fee rate for both funding and closing transactions, in sats/vbytes
    • refundlocktime - Locktime of the refund transaction
    • cetlocktime <value> - Should not be set unless you know what you are doing. Locktime of the contract execution transactions (defaults to current height)
    • peer - Peer's network address
  • acceptdlc offer peer - Accepts a DLC offer given from another party
    • offer - Hex encoded dlc offer message
    • peer - Peer's network address
  • acceptdlcoffer offer - Accepts a DLC offer given from another party
    • offer - Hex encoded offer message
  • peer - Peer's network address
  • acceptdlcofferfromfile path [destination] - Accepts a DLC offer given from another party
    • path - Path to dlc offer file
    • destination - Path to write dlc accept message
  • contact-add alias address memo
    • alias - alias for the address like a name
    • address - the tor address for the peer
    • memo - a memo for this contact
  • contacts-list - lists all contacts in the wallet
  • contact-remove address
    • address - the tor address for the peer to remove
  • dlc-contact-add dlcid address - Associated a DLC with a peer
  • dlc-contact-remove dlcid - Removes a DLC-peer association
    • address - the tor address for the peer to remove
  • signdlc accept - Signs a DLC
    • accept - Hex encoded dlc accept message
  • signdlcfromfile path [destination] - Signs a DLC
    • path - Path to dlc accept file
    • destination - Path to write dlc sign message
  • adddlcsigs sigs - Adds DLC Signatures into the database
    • sigs - Hex encoded dlc sign message
  • adddlcsigsfromfile path - Adds DLC Signatures into the database
    • path - Path to dlc sign file
  • adddlcsigsandbroadcast sigs - Adds DLC Signatures into the database and broadcasts the funding transaction
    • sigs - Hex encoded dlc sign message
  • adddlcsigsandbroadcastfromfile path - Adds DLC Signatures into the database and broadcasts the funding transaction
    • path - Path to dlc sign file
  • getdlcfundingtx contractId - Returns the Funding Tx corresponding to the DLC with the given contractId
    • contractId - ContractId of the DLC
  • broadcastdlcfundingtx contractId - Broadcasts the funding Tx corresponding to the DLC with the given contractId
    • contractId - ContractId of the DLC
  • executedlc contractId oraclesigs [options] - Executes the DLC with the given contractId
    • contractId - ContractId of the DLC
    • oraclesigs - Array of oracle attestations
    • --noBroadcast - Gives full serialized transaction instead of broadcasting
  • executedlcrefund contractId [options] - Executes the Refund transaction for the given DLC
    • contractId - ContractId of the DLC
    • --noBroadcast - Gives full serialized transaction instead of broadcasting
  • canceldlc dlcId - Cancels a DLC and unreserves used utxos
    • dlcId - Internal id of the DLC
  • getdlcs - Returns all dlcs in the wallet
    • address - optional contact address, if specified the RPC returns only DLCs associated with the given address
  • getdlc dlcId - Gets a specific dlc in the wallet
    • dlcId - Internal id of the DLC
  • offer-add offerTLV peerAddress message - Puts an incoming offer into the inbox
    • offerTLV - Offer TLV
    • peer - Peer URI (optional)
    • message - Peer's message or note (optional)
  • "offer-remove hash - Remove an incoming offer from inbox
    • hash - Hash of the offer TLV
  • offer-send offerOrTempContractId peerAddress message - Sends an offer to a peer. offerOrTempContractId is either an offer TLV or a temporary contract ID.
  • offers-list - List all incoming offers from the inbox
  • getdlcoffer tempContractId - Gets a DLC offer by temporary contract ID.
  • getaddresslabel address - gets all labels for an address
  • getaddresslabels - returns all addresses with labels in the wallet
  • dropaddresslabel address label - drops the label for a given address
  • dropaddresslabels address - drops all labels for the given address

Network

  • getconnectioncount - Get the number of connected peers
  • stop - Request a graceful shutdown of Bitcoin-S
  • sendrawtransaction tx Broadcasts the raw transaction
    • tx - Transaction serialized in hex

PSBT

  • decodepsbt psbt - Return a JSON object representing the serialized, base64-encoded partially signed Bitcoin transaction.
    • psbt - PSBT serialized in hex or base64 format
  • combinepsbts psbts - Combines all the given PSBTs
    • psbts - PSBTs serialized in hex or base64 format
  • joinpsbts psbts - Combines all the given PSBTs
    • psbts - PSBTs serialized in hex or base64 format
  • finalizepsbt psbt - Finalizes the given PSBT if it can
    • psbt - PSBT serialized in hex or base64 format
  • extractfrompsbt psbt - Extracts a transaction from the given PSBT if it can
    • psbt - PSBT serialized in hex or base64 format
  • converttopsbt unsignedTx - Creates an empty psbt from the given transaction
    • unsignedTx - serialized unsigned transaction in hex

Util

  • createmultisig nrequired keys [address_type] - Creates a multi-signature address with n signature of m keys required.
    • nrequired - The number of required signatures out of the n keys.
    • keys - The hex-encoded public keys.
    • address_type -The address type to use. Options are "legacy", "p2sh-segwit", and "bech32"
  • estimatefee - Returns the recommended fee rate using the fee provider

getinfo

curl --data-binary '{"jsonrpc": "1.0", "id": "curltest", "method": "getinfo", "params": []}' -H "Content-Type: application/json" http://127.0.0.1:9999/
{"result":{"network":"main","blockHeight":750129,"blockHash":"00000000000000000002f7d39ca6c914329a8d87010215ef6466c17ffaba0a1f","torStarted":true,"syncing":false,"isinitialblockdownload":false},"error":null}

Sign PSBT with Wallet Example

Bitcoin-S CLI:

bitcoin-s-cli signpsbt cHNidP8BAP0FAQIAAAABWUWxYiPKgdGfXcIxJ6MRDxEpUecw59Gk4NpROI5oukoBAAAAAAAAAAAEPttkvdwAAAAXqRSOVAp6Qe/u2hq74e/ThB8foBKn7IfZYMgGCAAAAADbmaQ2nwAAAEdRIQLpfVqyaL9Jb/IkveatNyVeONE8Q/6TzXAWosxLo9e21SECc5G3XiK7xKLlkBG7prMx7p0fMeQwMH5e9H10mBon39JSrtgtgjjLAQAAUGMhAn2YaZnv25I6d6vbb1kw6Xp5IToDrEzl/0VBIW21gHrTZwXg5jGdALJ1IQKyNpDNiOiN6lWpYethib04+XC9bpFXrdpec+xO3U5IM2is9ckf5AABAD0CAAAAAALuiOL0rRcAABYAFPnpLByQq1Gg3vwiP6qR8FmOOjwxvVllM08DAAALBfXJH+QAsXUAAK4AAAAAAQcBAAAAAAAA
cHNidP8BAP0FAQIAAAABWUWxYiPKgdGfXcIxJ6MRDxEpUecw59Gk4NpROI5oukoBAAAAAAAAAAAEPttkvdwAAAAXqRSOVAp6Qe/u2hq74e/ThB8foBKn7IfZYMgGCAAAAADbmaQ2nwAAAEdRIQLpfVqyaL9Jb/IkveatNyVeONE8Q/6TzXAWosxLo9e21SECc5G3XiK7xKLlkBG7prMx7p0fMeQwMH5e9H10mBon39JSrtgtgjjLAQAAUGMhAn2YaZnv25I6d6vbb1kw6Xp5IToDrEzl/0VBIW21gHrTZwXg5jGdALJ1IQKyNpDNiOiN6lWpYethib04+XC9bpFXrdpec+xO3U5IM2is9ckf5AABAD0CAAAAAALuiOL0rRcAABYAFPnpLByQq1Gg3vwiP6qR8FmOOjwxvVllM08DAAALBfXJH+QAsXUAAK4AAAAAAQcBAAAAAAAA

CURL:

curl --data-binary '{"jsonrpc": "1.0", "id": "curltest", "method": "signpsbt", "params": ["cHNidP8BAP0FAQIAAAABWUWxYiPKgdGfXcIxJ6MRDxEpUecw59Gk4NpROI5oukoBAAAAAAAAAAAEPttkvdwAAAAXqRSOVAp6Qe/u2hq74e/ThB8foBKn7IfZYMgGCAAAAADbmaQ2nwAAAEdRIQLpfVqyaL9Jb/IkveatNyVeONE8Q/6TzXAWosxLo9e21SECc5G3XiK7xKLlkBG7prMx7p0fMeQwMH5e9H10mBon39JSrtgtgjjLAQAAUGMhAn2YaZnv25I6d6vbb1kw6Xp5IToDrEzl/0VBIW21gHrTZwXg5jGdALJ1IQKyNpDNiOiN6lWpYethib04+XC9bpFXrdpec+xO3U5IM2is9ckf5AABAD0CAAAAAALuiOL0rRcAABYAFPnpLByQq1Gg3vwiP6qR8FmOOjwxvVllM08DAAALBfXJH+QAsXUAAK4AAAAAAQcBAAAAAAAA"]}' -H "Content-Type: application/json" http://127.0.0.1:9999/
{"result":"cHNidP8BAP0FAQIAAAABWUWxYiPKgdGfXcIxJ6MRDxEpUecw59Gk4NpROI5oukoBAAAAAAAAAAAEPttkvdwAAAAXqRSOVAp6Qe/u2hq74e/ThB8foBKn7IfZYMgGCAAAAADbmaQ2nwAAAEdRIQLpfVqyaL9Jb/IkveatNyVeONE8Q/6TzXAWosxLo9e21SECc5G3XiK7xKLlkBG7prMx7p0fMeQwMH5e9H10mBon39JSrtgtgjjLAQAAUGMhAn2YaZnv25I6d6vbb1kw6Xp5IToDrEzl/0VBIW21gHrTZwXg5jGdALJ1IQKyNpDNiOiN6lWpYethib04+XC9bpFXrdpec+xO3U5IM2is9ckf5AABAD0CAAAAAALuiOL0rRcAABYAFPnpLByQq1Gg3vwiP6qR8FmOOjwxvVllM08DAAALBfXJH+QAsXUAAK4AAAAAAQcBAAAAAAAA","error":null}

Websocket endpoints

Bitcoin-s offers websocket endpoints. By default, the endpoint is ws://localhost:1999/events

You can configure where how the endpoints are configured inside your bitcoin-s.conf

bitcoin-s.server.wsbind=localhost
bitcoin-s.server.wsport=19999

These events are implemented using our internal callback mechanism.

An example event that is defined is our blockprocess event. Everytime our wallet processes a block, our wallet will notify you via websockets. Here is an example payload

The current types of events defined are

  1. txprocessed - when the wallet processes a transaction. Every transaction in a block will get relayed currently
  2. reservedutxos - when the wallet reserves OR unreserves utxos
  3. newaddress - when the wallet generates a new address
  4. txbroadcast - when the wallet broadcasts a tx
  5. blockprocessed - when the wallet processes a block
{"type":"blockprocessed","payload":{"raw":"04e0ff2ffce8c3e866e367d305886a3f9d353e557524f61f9cf0c26c46000000000000001206d2e396387bff1c13cbe572d4646abae1ae405f4066ab5e6f5edd6d8f028008a8bb61ffff001af23dd47e","hash":"00000000000000de21f23f6945f028d5ecb47863428f6e9e035ab2fb7a3ef356","confirmations":1,"height":2131641,"version":805298180,"versionHex":"2fffe004","merkleroot":"80028f6ddd5e6f5eab66405f40aee1ba6a64d472e5cb131cff7b3896e3d20612","time":1639688200,"mediantime":1639688200,"nonce":2127838706,"bits":"1a00ffff","difficulty":1.6069135243303364E60,"chainwork":"00000000000000000000000000000000000000000000062438437ddd009e698b","previousblockhash":"00000000000000466cc2f09c1ff62475553e359d3f6a8805d367e366e8c3e8fc","nextblockhash":null}}
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