com.google.bitcoin.uri

Class BitcoinURI

java.lang.Object

com.google.bitcoin.uri.BitcoinURI

public class BitcoinURI
extends Object

Provides a standard implementation of a Bitcoin URI with support for the following:

• URLEncoded URIs (as passed in by IE on the command line)
• BIP21 names (including the "req-" prefix handling requirements)

Accepted formats

The following input forms are accepted:

• bitcoin:<address>
• bitcoin:<address>?<name1>=<value1>&<name2>=<value2> with multiple additional name/value pairs

The name/value pairs are processed as follows.

1. URL encoding is stripped and treated as UTF-8
2. names prefixed with req- are treated as required and if unknown or conflicting cause a parse exception
3. Unknown names not prefixed with req- are added to a Map, accessible by parameter name
4. Known names not prefixed with req- are processed unless they are malformed

The following names are known and have the following formats:

• amount decimal value to 8 dp (e.g. 0.12345678) Note that the exponent notation is not supported any more
• label any URL encoded alphanumeric
• message any URL encoded alphanumeric

Author:

Andreas Schildbach (initial code), Jim Burton (enhancements for MultiBit), Gary Rowe (BIP21 support)

See Also:

BIP 0021

Field Summary

Fields

Modifier and Type	Field and Description
static String	BITCOIN_SCHEME
static String	FIELD_ADDRESS
static String	FIELD_AMOUNT
static String	FIELD_LABEL
static String	FIELD_MESSAGE
static String	FIELD_PAYMENT_REQUEST_URL

Constructor Summary

Constructors

Constructor and Description
BitcoinURI(NetworkParameters params, String input) Constructs a new object by trying to parse the input as a valid Bitcoin URI.
BitcoinURI(String uri) Constructs a new BitcoinURI from the given string.

Method Summary

Methods

Modifier and Type	Method and Description
static String	convertToBitcoinURI(Address address, BigInteger amount, String label, String message)
static String	convertToBitcoinURI(String address, BigInteger amount, String label, String message) Simple Bitcoin URI builder using known good fields.
Address	getAddress() The Bitcoin Address from the URI, if one was present.
BigInteger	getAmount()
String	getLabel()
String	getMessage()
Object	getParameterByName(String name)
String	getPaymentRequestUrl()
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

FIELD_MESSAGE

public static final String FIELD_MESSAGE

See Also:

Constant Field Values

FIELD_LABEL

public static final String FIELD_LABEL

See Also:

Constant Field Values

FIELD_AMOUNT

public static final String FIELD_AMOUNT

See Also:

Constant Field Values

FIELD_ADDRESS

public static final String FIELD_ADDRESS

See Also:

Constant Field Values

FIELD_PAYMENT_REQUEST_URL

public static final String FIELD_PAYMENT_REQUEST_URL

See Also:

Constant Field Values

BITCOIN_SCHEME

public static final String BITCOIN_SCHEME

See Also:

Constant Field Values

Constructor Detail

BitcoinURI

public BitcoinURI(String uri)
           throws BitcoinURIParseException

Constructs a new BitcoinURI from the given string. Can be for any network.

Parameters:

uri - The raw URI data to be parsed (see class comments for accepted formats)

Throws:

BitcoinURIParseException - if the URI is not syntactically or semantically valid.

BitcoinURI

public BitcoinURI(@Nullable
          NetworkParameters params,
          String input)
           throws BitcoinURIParseException

Constructs a new object by trying to parse the input as a valid Bitcoin URI.

Parameters:

params - The network parameters that determine which network the URI is from, or null if you don't have any expectation about what network the URI is for and wish to check yourself.

input - The raw URI data to be parsed (see class comments for accepted formats)

Throws:

BitcoinURIParseException - If the input fails Bitcoin URI syntax and semantic checks.

Method Detail

getAddress

@Nullable
public Address getAddress()

The Bitcoin Address from the URI, if one was present. It's possible to have Bitcoin URI's with no address if a r= payment protocol parameter is specified, though this form is not recommended as older wallets can't understand it.

getAmount

public BigInteger getAmount()

Returns:

The amount name encoded using a pure integer value based at 10,000,000 units is 1 BTC. May be null if no amount is specified

getLabel

public String getLabel()

Returns:

The label from the URI.

getMessage

public String getMessage()

Returns:

The message from the URI.

getPaymentRequestUrl

public String getPaymentRequestUrl()

Returns:

The URL where a payment request (as specified in BIP 70) may be fetched.

getParameterByName

public Object getParameterByName(String name)

Parameters:

name - The name of the parameter

Returns:

The parameter value, or null if not present

toString

public String toString()

Overrides:

toString in class Object

convertToBitcoinURI

public static String convertToBitcoinURI(Address address,
                         BigInteger amount,
                         String label,
                         String message)

convertToBitcoinURI

public static String convertToBitcoinURI(String address,
                         @Nullable
                         BigInteger amount,
                         @Nullable
                         String label,
                         @Nullable
                         String message)

Simple Bitcoin URI builder using known good fields.

Parameters:

address - The Bitcoin address

amount - The amount in nanocoins (decimal)

label - A label

message - A message

Returns:

A String containing the Bitcoin URI