# Lib

The Bitcoin Computer Library (available on Github and Npm) provides all the functionality needed to write smart contracts with the Bitcoin Computer.

To interface with the blockchain, the Bitcoin Computer Lib connects to a Bitcoin Computer node. By default the Bitcoin Computer Lib connects to a node in regtest node that we provide. You can find more information about configuration options in the section constructor.

# Api

# Basic

You can build almost all smart contracts with following methods.

Method	Description
constructor	Creates an instance of class Computer
new	Creates a smart object from a smart contract
query	Finds the latest revisions of smart object
sync	Computes the state of a smart object from a given revision

# Advanced

To build advanced applications like swaps have a look at the following.

Method	Description
encode	Encodes a Javascript expression into a Bitcoin transaction
encodeNew	Encodes a constructor call into a Bitcoin transaction
encodeCall	Encodes a function call into a Bitcoin transaction
decode	Parses a Bitcoin transaction and returns Javascript expression
faucet	Fund a computer object on Regtest

# Modules

You can save transaction fees by using our ES6 module system.

Method	Description
deploy	Deploys an ES6 module on the blockchain
load	Loads an ES6 module from the blockchain

# Wallet

The wallet functionality within a Computer instance can be accessed using the following.

Method	Description
sign	Signs a Bitcoin transaction
broadcast	Broadcasts a Bitcoin transaction
send	Sends satoshis to an address
rpcCall	Access Bitcoin's RPC interface
getAddress	Returns the Bitcoin address of the computer wallet
getBalance	Confirmed, unconfirmed and total balance in sats
getChain	Returns the blockchain
getNetwork	Returns the network
getMnemonic	Returns a BIP39 mnemonic sentence
getPassphrase	Returns the passphrase
getPrivateKey	Returns the private key
getPublicKey	Returns the public key
getUtxos	Returns an array of unspent transaction outputs