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XMPIP-0021.md

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  XMPIP: 0021
  Title: Counterparty API refinement
  Authors: Cryptcoin Junkey
  Discussions-To: 
  Status: Draft
  Type: Standards
  Created: 2022-01-06

Abstract

This article defines to applying API refinement with some breaking changes.

Currently, Counterparty-server provides some API to users. But it have some issues.

  • Some tables is not exposed to get_{table} API.
  • get_messages() doesn't fit a get_{table} API style even if the messages table is in the DB.
  • Some tables don't have block_index but get_{table} API doesn't care about them.

Motivation

The purpose of this refinement is to provide the better API that exposes tables in DB to API users.

Specification

  • The current get_messages is renamed to get_messages_by_block_index.
  • The new get_messages accepts get_{table} style arguments and returns get_{table} style values.
  • get_mempool ignores two arguments start_block and end_block.
  • get_addresses, get_blocks and get_transactions are added with the get_{table} style.

Rationale

The name get_messages conflicts get_{table} style get_messages API. At least major Monaparty dApps don't use the current get_message. So it'll be acceptable if a breaking change is done.

There already have an index_begin/index_end guard on get_balances, get_order_matches, get_bet_matches. So get_mempool should be guarded as same as them.

Other refinements exclude above are for reducing dependencies to sql API. It will reduce dependencies to Counterblock-server. We'll get a way to develop new explorers/cache-server/wallet-interfaces.

Backward Compatibility

Two breaking changes.

get_messages API have no backward compatibility. Users can avoid it with using get_messages_by_block_index instead.

The result get_mempool with start_block and/or end_block doesn't contain errors. But almost users have no pain. (Some test codes might failed.)

Acknowledements

Copyright

This XMPIP is released under CC0-1.0 and therefore Public Domain.