Protocol Changes

This documents lists changes made by protocol version.

Version 1.0

Deprecated methods

• blockchain.utxo.get_address()

• blockchain.numblocks.subscribe()

Version 1.1

Changes

• improved semantics of server.version() to aid protocol negotiation, and a changed return value.

• blockchain.transaction.get() no longer takes the height argument that was ignored anyway.

• blockchain.transaction.broadcast() returns errors like any other JSON RPC call. A transaction hash result is only returned on success.

New methods

• blockchain.scripthash.get_balance()

• blockchain.scripthash.get_history()

• blockchain.scripthash.get_mempool()

• blockchain.scripthash.listunspent()

• blockchain.scripthash.subscribe()

• server.features()

• server.add_peer()

Removed methods

• blockchain.utxo.get_address()

• blockchain.numblocks.subscribe()

Version 1.2

Changes

• blockchain.transaction.get() now has an optional parameter verbose.

• blockchain.headers.subscribe() now has an optional parameter raw.

• server.version() should not be used for “ping” functionality; use the new server.ping() method instead.

New methods

• blockchain.block.headers()

• mempool.get_fee_histogram()

• server.ping()

Deprecated methods

• blockchain.block.get_chunk(). Switch to blockchain.block.headers()

• blockchain.address.get_balance(). Switch to blockchain.scripthash.get_balance().

• blockchain.address.get_history(). Switch to blockchain.scripthash.get_history().

• blockchain.address.get_mempool(). Switch to blockchain.scripthash.get_mempool().

• blockchain.address.listunspent(). Switch to blockchain.scripthash.listunspent().

• blockchain.address.subscribe(). Switch to blockchain.scripthash.subscribe().

• blockchain.headers.subscribe() with raw other than True.

Version 1.3

Changes

• blockchain.headers.subscribe() argument raw switches default to True

New methods

• blockchain.block.header()

Removed methods

• blockchain.address.get_balance()

• blockchain.address.get_history()

• blockchain.address.get_mempool()

• blockchain.address.listunspent()

• blockchain.address.subscribe()

Deprecated methods

• blockchain.block.get_header(). Switch to blockchain.block.header().

Version 1.4

This version removes all support for deserialized headers.

Changes

• Deserialized headers are no longer available, so removed argument raw from blockchain.headers.subscribe().

• Only the first server.version() message is accepted.

• Optional cp_height argument added to blockchain.block.header() and blockchain.block.headers() to return merkle proofs of the header to a given checkpoint.

New methods

• blockchain.transaction.id_from_pos() to return a transaction hash, and optionally a merkle proof, given a block height and position in the block.

Removed methods

• blockchain.block.get_header()

• blockchain.block.get_chunk()

Version 1.4.1

Changes

• blockchain.block.header() and blockchain.block.headers() now truncate AuxPoW data (if using an AuxPoW chain) when cp_height is nonzero. AuxPoW data is still present when cp_height is zero. Non-AuxPoW chains are unaffected.

Version 1.4.2

New methods

• blockchain.scripthash.unsubscribe() to unsubscribe from a script hash.

Version 1.4.3

New methods

• blockchain.name.get_value_proof() to resolve a name (with proof). Name index coins (e.g. Namecoin) only.