仅在Solana的交易数据中获取NFT转移

Question

给定一个钱包地址，我想找到发送给它的NFT的所有交易。我有一些代码，但不能100％确定它只是在做NFT。确定交易或解析指令是否与NFT相关的标识符是什么（SPL-TOKEN？）

import {
    clusterApiUrl,
    ConfirmedSignaturesForAddress2Options,
    Connection,
    PublicKey,
} from '@solana/web3.js';
import fs from 'fs';
import path from 'path';

const WALLET = "<WALLET>"; // receiving NFTs
const LIMIT = 100;

(async () => {
    // Connect to the Solana cluster
    const c = new Connection(clusterApiUrl('mainnet-beta'));

    // The wallet receiving NFTs
    const p = new PublicKey(WALLET);

    // Query for signitures
    const opts: ConfirmedSignaturesForAddress2Options = {
        limit: 10,
    }
    const cs = await c.getConfirmedSignaturesForAddress2(p, opts);

    // Parse the signiture transaction data
    const td = [];
    for (let i = 0; i < cs.length; i++) {

        const s = cs[i];
        const d = await c.getParsedTransaction(s.signature, 'finalized');

        if (!d) continue;
        td.push(d);

    }

    // Build a map of mint source and destinations
    const tm: any = {};
    for (let i = 0; i < td.length; i++) {
        const d = td[i];

        d.meta?.postTokenBalances?.forEach(({ mint, owner }) => {

            if (!tm[mint]) tm[mint] = { destination: "", source: "" };
            if (owner === p.toString()) tm[mint].destination = owner;
            else tm[mint].source = owner;

        });
    }

    fs.writeFileSync(path.join(process.cwd(), 'nft-transfers.json'), JSON.stringify(tm, null, 2));

})();

Answer 1

你快到了！如果要过滤NFT，则需要检查已转移的令牌的薄荷，并检查薄荷的电源是否为1，例如：

// Parse the signiture transaction data
    const td = [];
    for (let i = 0; i < cs.length; i++) {

        const s = cs[i];
        const d = await c.getParsedTransaction(s.signature, 'finalized');

        if (!d) continue;
        if (d.meta.preTokenBalances.includes(1) &&
            d.meta.preTokenBalances.includes(0) &&
            d.meta.postTokenBalances.includes(1) &&
            d.meta.postTokenBalances.includes(0)) {
            td.push(d);
        }
    }

这很笨拙，因为它只是它检查某些帐户之前和之后有1和0令牌。您可能可以使用查找更聪明地做一些更智能的事情，以确保更改了1和0的帐户索引。