Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 | 1x 1x 1x 1x 1x 1x 1x 2x 2x 2x 2x 1x 1x 1x 1x 4x 4x 4x 4x 1x 1x 1x 1x 8x 1x 1x 1x 6x 2x 6x 2x 2x 2x 2x 2x 6x 2x 19x 1x 1x 2x 1x 1x 1x 1x 19x 19x 3x 16x 1x 1x 1x 1x 1x | import { PublicKey, ParsedTransactionWithMeta, PartiallyDecodedInstruction } from '@solana/web3.js';
import { Buffer } from 'buffer';
import base58 from 'bs58';
import { DEX_PROGRAMS, DISCRIMINATORS, TOKENS } from './constants';
import { convertToUiAmount, TradeInfo, TradeType } from './types';
interface PumpfunTradeEvent {
mint: PublicKey;
solAmount: bigint;
tokenAmount: bigint;
isBuy: boolean;
user: PublicKey;
timestamp: bigint;
virtualSolReserves: bigint;
virtualTokenReserves: bigint;
}
interface PumpfunCreateEvent {
name: string;
symbol: string;
uri: string;
mint: PublicKey;
bondingCurve: PublicKey;
user: PublicKey;
}
// Binary reader implementation with better error handling
class BinaryReader {
private offset = 0;
constructor(private buffer: Buffer) { }
readFixedArray(length: number): Buffer {
this.checkBounds(length);
const array = this.buffer.slice(this.offset, this.offset + length);
this.offset += length;
return array;
}
readU8(): number {
this.checkBounds(1);
const value = this.buffer.readUInt8(this.offset);
this.offset += 1;
return value;
}
readU64(): bigint {
this.checkBounds(8);
const value = this.buffer.readBigUInt64LE(this.offset);
this.offset += 8;
return value;
}
readI64(): bigint {
this.checkBounds(8);
const value = this.buffer.readBigInt64LE(this.offset);
this.offset += 8;
return value;
}
private checkBounds(length: number) {
Iif (this.offset + length > this.buffer.length) {
throw new Error(`Buffer overflow: trying to read ${length} bytes at offset ${this.offset} in buffer of length ${this.buffer.length}`);
}
}
}
export class PumpfunParser {
constructor(private readonly txWithMeta: ParsedTransactionWithMeta) { }
public processTrades(): TradeInfo[] {
return this.txWithMeta.transaction.message.instructions
.reduce((trades: TradeInfo[], instruction: any, index: number) => {
if (instruction.programId.toBase58() === DEX_PROGRAMS.PUMP_FUN.id) {
trades.push(...this.processInstructionTrades(index));
}
return trades;
}, []);
}
public processInstructionTrades(instructionIndex: number): TradeInfo[] {
const events = this.parseInnerInstructions(instructionIndex);
return this.processSwapData(events);
}
private parseInnerInstructions(instructionIndex: number): PumpfunTradeEvent[] {
const innerInstructions = this.txWithMeta.meta?.innerInstructions;
Iif (!innerInstructions) return [];
return innerInstructions
.filter(set => set.index === instructionIndex)
.flatMap(set => set.instructions
.filter(ix => this.isPumpFunTradeEvent(ix as PartiallyDecodedInstruction))
.map(ix => this.parseTradeEvent(ix as PartiallyDecodedInstruction))
.filter((event): event is PumpfunTradeEvent => event !== null)
);
}
private processSwapData(events: PumpfunTradeEvent[]): TradeInfo[] {
if (!events.length) return [];
return events.map(event => this.createTradeInfo(event));
}
private createTradeInfo(event: PumpfunTradeEvent): TradeInfo {
const tradeType: TradeType = event.isBuy ? "BUY" : "SELL";
const isBuy = tradeType === 'BUY';
return {
type: tradeType,
inputToken: {
mint: isBuy ? event.mint.toBase58() : TOKENS.SOL,
amount: isBuy ? convertToUiAmount(event.tokenAmount, 6) : convertToUiAmount(event.solAmount, 9),
decimals: isBuy ? 6 : 9,
},
outputToken: {
mint: isBuy ? TOKENS.SOL : event.mint.toBase58(),
amount: isBuy ? convertToUiAmount(event.solAmount, 9) : convertToUiAmount(event.tokenAmount, 6),
decimals: isBuy ? 9 : 6,
},
user: event.user.toBase58(),
programId: DEX_PROGRAMS.PUMP_FUN.id,
amm: DEX_PROGRAMS.PUMP_FUN.name,
slot: this.txWithMeta.slot,
timestamp: this.txWithMeta.blockTime || 0,
signature: this.txWithMeta.transaction.signatures[0],
};
}
private isPumpFunTradeEvent(instruction: PartiallyDecodedInstruction): boolean {
try {
const data = base58.decode(instruction.data as string);
return Buffer.from(data.slice(0, 16)).equals(DISCRIMINATORS.PUMPFUN.TRADE_EVENT);
} catch {
return false;
}
}
private parseTradeEvent(instruction: PartiallyDecodedInstruction): PumpfunTradeEvent | null {
try {
const data = base58.decode(instruction.data as string);
return this.decodeTradeEvent(data.slice(16));
} catch (error) {
console.error('Failed to parse PumpFun trade event:', error);
return null;
}
}
private decodeTradeEvent(data: Buffer): PumpfunTradeEvent {
const reader = new BinaryReader(data);
return {
mint: new PublicKey(reader.readFixedArray(32)),
solAmount: reader.readU64(),
tokenAmount: reader.readU64(),
isBuy: reader.readU8() === 1,
user: new PublicKey(reader.readFixedArray(32)),
timestamp: reader.readI64(),
virtualSolReserves: reader.readU64(),
virtualTokenReserves: reader.readU64()
};
}
} |