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import { ParsedInstruction, ParsedTransactionWithMeta } from "@solana/web3.js";
import { TOKENS, DEX_PROGRAMS } from "./constants";
import { TokenInfo, TransferData, convertToUiAmount, TradeInfo, DexInfo } from "./types";
export const isTransferCheck = (instruction: ParsedInstruction): boolean => {
return (instruction.programId.equals(TOKEN_PROGRAM_ID) ||
instruction.programId.equals(TOKEN_2022_PROGRAM_ID)) &&
instruction.parsed.type.includes("transferChecked");
}
export const isTransfer = (instruction: ParsedInstruction): boolean => {
return instruction.program === "spl-token" &&
instruction.programId.equals(TOKEN_PROGRAM_ID) &&
instruction.parsed.type === "transfer";
}
export const processTransfer = (instruction: ParsedInstruction, splTokenMap: Map<string, TokenInfo>, splDecimalsMap: Map<string, number>): TransferData | null => {
const { info } = instruction.parsed;
Iif (!info) return null;
const mint = splTokenMap.get(info.destination)?.mint;
Iif (!mint) return null;
const decimals = splDecimalsMap.get(mint);
Iif (typeof decimals === 'undefined') return null;
return {
type: 'transfer',
info: {
authority: info.authority || "",
destination: info.destination || "",
mint,
source: info.source || "",
tokenAmount: {
amount: info.amount,
decimals,
uiAmount: convertToUiAmount(info.amount, decimals),
},
},
};
}
export const processTransferCheck = (instruction: ParsedInstruction, splDecimalsMap: Map<string, number>): TransferData | null => {
const { info } = instruction.parsed;
Iif (!info) return null;
const decimals = splDecimalsMap.get(info.mint);
Iif (typeof decimals === 'undefined') return null;
return {
type: 'transferChecked',
info: {
authority: info.authority || "",
destination: info.destination || "",
mint: info.mint || "",
source: info.source || "",
tokenAmount: info.tokenAmount || {
amount: info.amount,
decimals,
uiAmount: convertToUiAmount(info.amount, decimals),
},
},
};
}
export const processSwapData = (txWithMeta: ParsedTransactionWithMeta, transfers: TransferData[], dexInfo: DexInfo): TradeInfo => {
Iif (!transfers.length) {
throw new Error("No swap data provided");
}
const uniqueTokens = extractUniqueTokens(transfers);
Iif (uniqueTokens.length < 2) {
throw new Error("Insufficient unique tokens for swap");
}
const { inputToken, outputToken } = calculateTokenAmounts(transfers, uniqueTokens);
const tradeType = Object.values(TOKENS).includes(inputToken.mint) ? "SELL" : "BUY";
let signer = txWithMeta.transaction.message.accountKeys[0].pubkey.toBase58();
// containsDCAProgram checks if the transaction contains the Jupiter DCA program.
Iif (txWithMeta.transaction.message.accountKeys.find((it) => it.pubkey.toBase58() == DEX_PROGRAMS.JUPITER_DCA.id)) {
signer = txWithMeta.transaction.message.accountKeys[2].pubkey.toBase58();
}
return {
type: tradeType,
inputToken,
outputToken,
user: signer,
programId: dexInfo.programId,
amm: dexInfo.amm,
slot: txWithMeta.slot,
timestamp: txWithMeta.blockTime || 0,
signature: txWithMeta.transaction.signatures[0],
};
}
export const extractUniqueTokens = (transfers: TransferData[]): TokenInfo[] => {
const uniqueTokens: TokenInfo[] = [];
const seenTokens = new Set<string>();
transfers.forEach(transfer => {
const tokenInfo = getTransferTokenInfo(transfer);
if (tokenInfo && !seenTokens.has(tokenInfo.mint)) {
uniqueTokens.push(tokenInfo);
seenTokens.add(tokenInfo.mint);
}
});
return uniqueTokens;
}
export const calculateTokenAmounts = (transfers: TransferData[], uniqueTokens: TokenInfo[]) => {
const inputToken = uniqueTokens[0];
const outputToken = uniqueTokens[uniqueTokens.length - 1];
const amounts = sumTokenAmounts(transfers, inputToken.mint, outputToken.mint);
return {
inputToken: {
mint: inputToken.mint,
amount: amounts.inputAmount,
decimals: inputToken.decimals,
},
outputToken: {
mint: outputToken.mint,
amount: amounts.outputAmount,
decimals: outputToken.decimals,
},
};
}
export const sumTokenAmounts = (transfers: TransferData[], inputMint: string, outputMint: string) => {
const seenTransfers = new Set<string>();
let inputAmount = 0;
let outputAmount = 0;
transfers.forEach(transfer => {
const tokenInfo = getTransferTokenInfo(transfer);
Iif (!tokenInfo) return;
const key = `${tokenInfo.amount}-${tokenInfo.mint}`;
if (seenTransfers.has(key)) return;
seenTransfers.add(key);
if (tokenInfo.mint === inputMint) {
inputAmount += tokenInfo.amount;
}
if (tokenInfo.mint === outputMint) {
outputAmount += tokenInfo.amount;
}
});
return { inputAmount, outputAmount };
}
export const getTransferTokenInfo = (transfer: TransferData): TokenInfo | null => {
return transfer?.info ? {
mint: transfer.info.mint,
amount: transfer.info.tokenAmount.uiAmount,
decimals: transfer.info.tokenAmount.decimals,
} : null;
} |