solana-dex-parser

<!doctype html> <html lang="en"> <head> <title>Code coverage report for parser-default.ts</title> <meta charset="utf-8" /> <link rel="stylesheet" href="prettify.css" /> <link rel="stylesheet" href="base.css" /> <link rel="shortcut icon" type="image/x-icon" href="favicon.png" /> <meta name="viewport" content="width=device-width, initial-scale=1" /> <style type='text/css'> .coverage-summary .sorter { background-image: url(sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1><a href="index.html">All files</a> parser-default.ts</h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 7.14% Statements 2/28 </div> <div class='fl pad1y space-right2'> 0% Branches 0/21 </div> <div class='fl pad1y space-right2'> 0% Functions 0/9 </div> <div class='fl pad1y space-right2'> 8% Lines 2/25 </div> </div> Press n or j to go to the next uncovered block, b, p or k for the previous block. <template id="filterTemplate"> <div class="quiet"> Filter: <input 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                                                                                 </td><td class="text"><pre class="prettyprint lang-js">import { ParsedTransactionWithMeta } from '@solana/web3.js'; import { TradeInfo } from './types'; import { getBalanceChanges, getDexInfo, getTokenDecimals, isSupportedToken } from './utils';   /** * BalanceChanges Parser */ export class DefaultParser { constructor(private readonly txWithMeta: ParsedTransactionWithMeta) { }   public processTrades(): TradeInfo[] { return this.parseTradesByBalanceChanges(this.txWithMeta, getDexInfo(this.txWithMeta)); }   public parseTradesByBalanceChanges( tx: ParsedTransactionWithMeta, dexInfo: { programId?: string; amm?: string }, ): TradeInfo[] { const { preBalances, postBalances } = getBalanceChanges(tx); const trades: TradeInfo[] = []; const signer = tx.transaction.message.accountKeys[0].pubkey.toBase58(); Object.entries(postBalances).forEach(([owner, mints]) => { const changes = this.getSignificantChanges(mints, preBalances[owner] || {});   Iif (changes.length !== 2) return; const [token1, token2] = changes;   Iif (signer != owner) return;   const trade = this.createTradeInfo(token1, token2, owner, tx, dexInfo); Iif (trade) trades.push(trade); });   return trades; }   private getSignificantChanges( postMints: Record<string, number>, preMints: Record<string, number> ) { return Object.entries(postMints) .map(([mint, postBalance]) => ({ mint, diff: postBalance - (preMints[mint] || 0) })) .filter(({ diff }) => diff !== 0); }   private createTradeInfo( token1: { mint: string; diff: number }, token2: { mint: string; diff: number }, owner: string, tx: ParsedTransactionWithMeta, dexInfo: { programId?: string; amm?: string } ): TradeInfo | null { const baseTradeInfo = { user: owner, programId: dexInfo.programId, amm: dexInfo.amm || "", slot: tx.slot, timestamp: tx.blockTime || 0, signature: tx.transaction.signatures[0], };   Iif (token1.diff < 0 && token2.diff > 0) { return { type: isSupportedToken(token1.mint) ? "SELL" : "BUY", inputToken: this.formatToken(token1, tx), outputToken: this.formatToken(token2, tx), ...baseTradeInfo, }; }   Iif (token1.diff > 0 && token2.diff < 0) { return { type: isSupportedToken(token1.mint) ? "BUY" : "SELL", inputToken: this.formatToken(token2, tx), outputToken: this.formatToken(token1, tx), ...baseTradeInfo, }; }   return null; }   private formatToken(token: { mint: string; diff: number }, tx: ParsedTransactionWithMeta) { return { mint: token.mint, amount: Math.abs(token.diff), decimals: getTokenDecimals(tx, token.mint), }; } }</pre></td></tr></table></pre> <div class='push'></div> </div> <div class='footer quiet pad2 space-top1 center small'> Code coverage generated by <a href="https://istanbul.js.org/" target="_blank" rel="noopener noreferrer">istanbul</a> at 2025-02-14T08:36:53.559Z </div> <script src="prettify.js"></script> <script> window.onload = function () { prettyPrint(); }; </script> <script src="sorter.js"></script> <script src="block-navigation.js"></script> </body> </html>