Package org.bitcoinj.base

The base package provides foundational types for bitcoinj. These types must have minimal dependencies. The criteria for allowed dependencies for base types are:

• No dependencies on other packages of bitcoinj
• No API dependencies on external libraries other than the core JDK and slf4j-api

Temporary exception: In the 0.17 release, we are allowing some dependencies on other packages, e.g. to NetworkParameters or to Guava provided that those references are in deprecated methods. This smooths migration by allowing users to, for example, replace import org.bitcoinj.core.Address with import org.bitcoinj.base.Address as first step of conversion and then remove usages of the deprecated methods of Address in a second step.

The base package makes bitcoinj more modular as it breaks circular dependencies between existing packages and provides a "zero-dependency" foundation for the other packages. In a future release base will be split into a separate JAR/module (tentatively bitcoinj-base.)

Interface Summary

Interface	Description
Address	Interface for addresses, e.g.
AddressParser	Functional interface for address parsing.
AddressParser.AddressParserProvider	Interface implemented by custom address parser providers.
Monetary	Classes implementing this interface represent a monetary value, such as a Bitcoin or fiat amount.
Network	Interface for a generic Bitcoin-like cryptocurrency network.

Class Summary

Class	Description
Base58	Base58 is a way to encode Bitcoin addresses (or arbitrary data) as alphanumeric strings.
Bech32	Implementation of the Bech32 encoding.
Bech32.Bech32Data	Bech32 decoded data in 5-bit byte format.
Coin	Represents a monetary Bitcoin value.
LegacyAddress	A Bitcoin address looks like 1MsScoe2fTJoq4ZPdQgqyhgWeoNamYPevy and is derived from an elliptic curve public key plus a set of network parameters.
SegwitAddress	Implementation of native segwit addresses.
Sha256Hash	A Sha256Hash wraps a byte[] so that Sha256Hash.equals(java.lang.Object) and Sha256Hash.hashCode() work correctly, allowing it to be used as a key in a map.
VarInt	A variable-length encoded unsigned integer using Satoshi's encoding (a.k.a.

Enum Summary

Enum	Description
Bech32.Encoding	Enumeration of known Bech32 encoding format types: Bech32 and Bech32m.
BitcoinNetwork	A convenient enum representation of a Bitcoin network.
LegacyAddress.AddressHeader	Address header of legacy P2PKH addresses for standard Bitcoin networks.
LegacyAddress.P2SHHeader	Address header of legacy P2SH addresses for standard Bitcoin networks.
ScriptType	Supported Bitcoin script types and their script identifier strings.
SegwitAddress.SegwitHrp	Human-readable part (HRP) of Segwit addresses for standard Bitcoin networks.