solana-dex-parser/src/parsers/raydium/liquidity-raydium-cpmm.ts

Solana Dex Transaction Parser

import { DISCRIMINATORS } from '../../constants';
import { PoolEventType } from '../../types';
import { RaydiumLiquidityParserBase, ParseEventConfig } from './parser-raydium-liquidity-base';

export class RaydiumCPMMPoolParser extends RaydiumLiquidityParserBase {
  public getPoolAction(data: Buffer): PoolEventType | null {
    const instructionType = data.slice(0, 8);
    if (instructionType.equals(DISCRIMINATORS.RAYDIUM_CPMM.CREATE)) return 'CREATE';
    if (instructionType.equals(DISCRIMINATORS.RAYDIUM_CPMM.ADD_LIQUIDITY)) return 'ADD';
    if (instructionType.equals(DISCRIMINATORS.RAYDIUM_CPMM.REMOVE_LIQUIDITY)) return 'REMOVE';
    return null;
  }

  public getEventConfig(type: PoolEventType): ParseEventConfig {
    const configs = {
      CREATE: {
        eventType: 'CREATE' as const,
        poolIdIndex: 3,
        lpMintIndex: 6,
        tokenAmountOffsets: { token0: 8, token1: 16, lp: 0 },
      },
      ADD: {
        eventType: 'ADD' as const,
        poolIdIndex: 2,
        lpMintIndex: 12,
        tokenAmountOffsets: { token0: 16, token1: 24, lp: 8 },
      },
      REMOVE: {
        eventType: 'REMOVE' as const,
        poolIdIndex: 2,
        lpMintIndex: 12,
        tokenAmountOffsets: { token0: 16, token1: 24, lp: 8 },
      },
    };
    return configs[type];
  }
}