solana-dex-parser
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Solana Dex Transaction Parser
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<h1><a href="index.html">All files</a> token-extractor.ts</h1>
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<span class="strong">65.15% </span>
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">import {
ParsedInstruction,
ParsedTransactionWithMeta,
PublicKey,
} from "@solana/web3.js";
import { TokenInfo } from "./types";
import { TOKENS } from "./constants";
import { TOKEN_PROGRAM_ID } from "@solana/spl-token";
interface TokenBalance {
mint: string;
accountIndex: number;
uiTokenAmount: {
decimals: number;
};
}
export class TokenInfoExtractor {
private readonly defaultSolInfo: TokenInfo = {
mint: TOKENS.SOL,
amount: 0,
decimals: 9,
};
constructor(private readonly txWithMeta: ParsedTransactionWithMeta) {}
public extractSPLTokenInfo(): Map<string, TokenInfo> {
const splTokenAddresses = new Map<string, TokenInfo>();
const allAccountKeys = this.txWithMeta.transaction.message.accountKeys;
this.processPostTokenBalances(splTokenAddresses, allAccountKeys);
this.processInstructions(splTokenAddresses);
this.fillMissingTokenInfo(splTokenAddresses);
return splTokenAddresses;
}
private processPostTokenBalances(
tokenMap: Map<string, TokenInfo>,
accountKeys: Array<{ pubkey: PublicKey }>
): void {
(this.txWithMeta.meta?.postTokenBalances || <span class="branch-1 cbranch-no" title="branch not covered" >[])</span>.forEach(accountInfo => {
if (accountInfo.mint) {
const accountKey = accountKeys[accountInfo.accountIndex].pubkey.toBase58();
tokenMap.set(accountKey, {
mint: accountInfo.mint.toString(),
amount: 0,
decimals: accountInfo.uiTokenAmount.decimals,
});
}
});
}
private processInstructions(tokenMap: Map<string, TokenInfo>): void {
const processInstruction = (instr: ParsedInstruction) => {
if (!instr.programId.equals(TOKEN_PROGRAM_ID)) return;
const { source, destination } = instr.parsed?.info || <span class="branch-1 cbranch-no" title="branch not covered" >{};</span>
if (!source && !destination) return;
const emptyTokenInfo = { mint: "", amount: 0, decimals: 0 };
if (source && !tokenMap.has(source)) {
tokenMap.set(source, emptyTokenInfo);
}
if (destination && !tokenMap.has(destination)) {
tokenMap.set(destination, emptyTokenInfo);
}
};
// Process main and inner instructions
this.getAllInstructions().forEach(instruction => {
processInstruction(instruction as ParsedInstruction);
});
}
private getAllInstructions(): ParsedInstruction[] {
const mainInstructions = this.txWithMeta.transaction.message.instructions;
const innerInstructions = (this.txWithMeta.meta?.innerInstructions || <span class="branch-1 cbranch-no" title="branch not covered" >[])</span>
.flatMap(set => set.instructions);
return [...mainInstructions, ...innerInstructions] as ParsedInstruction[];
}
private fillMissingTokenInfo(tokenMap: Map<string, TokenInfo>): void {
tokenMap.forEach((info, account) => {
if (!info.mint) {
tokenMap.set(account, this.defaultSolInfo);
}
});
}
public <span class="fstat-no" title="function not covered" >extractTokenInfo(</span>): Map<string, TokenInfo> {
<span class="cstat-no" title="statement not covered" > try {</span>
const tokenMap = <span class="cstat-no" title="statement not covered" >new Map<string, TokenInfo>();</span>
<span class="cstat-no" title="statement not covered" > this.getPostTokenBalances().forEach(<span class="fstat-no" title="function not covered" >balance </span>=> {</span>
<span class="cstat-no" title="statement not covered" > <span class="missing-if-branch" title="if path not taken" >I</span>if (balance.mint) {</span>
const mintAddress = <span class="cstat-no" title="statement not covered" >balance.mint.toString();</span>
<span class="cstat-no" title="statement not covered" > tokenMap.set(mintAddress, {</span>
mint: mintAddress,
amount: 0,
decimals: balance.uiTokenAmount.decimals,
});
}
});
<span class="cstat-no" title="statement not covered" > <span class="missing-if-branch" title="if path not taken" >I</span>if (!tokenMap.has(TOKENS.SOL)) {</span>
<span class="cstat-no" title="statement not covered" > tokenMap.set(TOKENS.SOL, this.defaultSolInfo);</span>
}
<span class="cstat-no" title="statement not covered" > return tokenMap;</span>
} catch (error) {
<span class="cstat-no" title="statement not covered" > throw this.formatError('extract token info', error);</span>
}
}
public extractDecimals(): Map<string, number> {
try {
const decimalsMap = new Map<string, number>();
this.getPostTokenBalances().forEach(balance => {
if (balance.mint) {
decimalsMap.set(balance.mint.toString(), balance.uiTokenAmount.decimals);
}
});
<span class="missing-if-branch" title="if path not taken" >I</span>if (!decimalsMap.has(TOKENS.SOL)) {
<span class="cstat-no" title="statement not covered" > decimalsMap.set(TOKENS.SOL, this.defaultSolInfo.decimals);</span>
}
return decimalsMap;
} catch (error) {
<span class="cstat-no" title="statement not covered" > throw this.formatError('extract decimals', error);</span>
}
}
public <span class="fstat-no" title="function not covered" >getDecimals(</span>mint: string): number {
<span class="cstat-no" title="statement not covered" > return this.getPostTokenBalances()</span>
.find(<span class="fstat-no" title="function not covered" >balance </span>=> <span class="cstat-no" title="statement not covered" >balance.mint === mint)</span>
?.uiTokenAmount.decimals ??
(mint === TOKENS.SOL ? this.defaultSolInfo.decimals : 0);
}
public <span class="fstat-no" title="function not covered" >validateTokenInfo(</span>requiredMints: PublicKey[]): void {
const balances = <span class="cstat-no" title="statement not covered" >this.getPostTokenBalances();</span>
const missingMints = <span class="cstat-no" title="statement not covered" >requiredMints.filter(<span class="fstat-no" title="function not covered" >mint </span>=> {</span>
const mintStr = <span class="cstat-no" title="statement not covered" >mint.toString();</span>
<span class="cstat-no" title="statement not covered" > return !balances.some(<span class="fstat-no" title="function not covered" >balance </span>=> </span>
<span class="cstat-no" title="statement not covered" > balance.mint.toString() === mintStr</span>
) && mint.toBase58() !== TOKENS.SOL;
});
<span class="cstat-no" title="statement not covered" > <span class="missing-if-branch" title="if path not taken" >I</span>if (missingMints.length > 0) {</span>
<span class="cstat-no" title="statement not covered" > throw this.formatError('validate token info', </span>
`Missing token info for mints: ${missingMints.map(<span class="fstat-no" title="function not covered" >m </span>=> <span class="cstat-no" title="statement not covered" >m.toString())</span>.join(", ")}`
);
}
}
private getPostTokenBalances(): TokenBalance[] {
return this.txWithMeta.meta?.postTokenBalances || <span class="branch-1 cbranch-no" title="branch not covered" >[];</span>
}
private <span class="fstat-no" title="function not covered" >formatError(</span>operation: string, error: unknown): string {
<span class="cstat-no" title="statement not covered" > return `Failed to ${operation}: ${error instanceof Error ? error.message : "Unknown error"}`;</span>
}
}</pre></td></tr></table></pre>
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at 2025-02-14T08:36:53.559Z
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