solana-dex-parser/src/parsers/base-liquidity-parser.ts

Solana Dex Transaction Parser

import { TransactionAdapter } from '../transaction-adapter';
import { TransactionUtils } from '../transaction-utils';
import { ClassifiedInstruction, PoolEvent, TransferData } from '../types';

export abstract class BaseLiquidityParser {
  protected readonly utils: TransactionUtils;

  constructor(
    protected readonly adapter: TransactionAdapter,
    protected readonly transferActions: Record<string, TransferData[]>,
    protected readonly classifiedInstructions: ClassifiedInstruction[]
  ) {
    this.utils = new TransactionUtils(adapter);
  }

  abstract processLiquidity(): PoolEvent[];

  protected getTransfersForInstruction(
    programId: string,
    outerIndex: number,
    innerIndex?: number,
    filterTypes?: string[]
  ): TransferData[] {
    const key = `${programId}:${outerIndex}${innerIndex == undefined ? '' : `-${innerIndex}`}`;
    const transfers = this.transferActions[key] || [];

    if (filterTypes) {
      return transfers.filter((t) => filterTypes.includes(t.type));
    }
    return transfers;
  }
}