Wallet recent trades

---
name: wallet-trades
description: Read a Solana wallet's most recent transactions and turn each into plain balance changes - which tokens went in and out, whether it was a swap, a buy, a send or a receive, with time and fee. Use when the user asks what a wallet has been trading, buying or selling lately. Read-only; needs only the public address.
---

# Wallet recent trades

Free and read-only. Uses the public Solana RPC. Only a public address is needed: never ask
the user for a private key or seed phrase, and refuse if one is offered.

## Run

```bash
node scripts/trades.mjs <wallet address>             # last 10 transactions
node scripts/trades.mjs <wallet address> --limit 20  # up to 20
```

Optional: set `SOLANA_RPC_URL` to your own RPC. The public RPC is rate-limited, so the
script waits between calls and a run of 20 takes several seconds.

## Output

JSON on stdout: `{ wallet, count, swaps, transactions: [ { signature, time, kind, changes:
[ { mint, delta } ], feeSol, failed } ] }`.

- `kind` is `swap` (something in and something out), `received`, `sent` or `other`.
- `mint` is `SOL` for native and wrapped SOL, otherwise the token mint address.
- `delta` is in whole tokens: negative left the wallet, positive came in.

## Notes for the agent

- To name the tokens, look up each mint (for example with the `dexscreener-token` skill).
- Link a transaction as `https://solscan.io/tx/<signature>`.
- Failed transactions are included with `failed: true`; leave them out of trade summaries.

{
  "slug": "wallet-trades",
  "name": "Wallet recent trades",
  "spine": "Trades",
  "summary": "Shows a Solana wallet's latest transactions as plain balance changes: what it swapped, bought, sent or received, with times and fees.",
  "job": "Check a wallet's recent trades",
  "category": "wallets",
  "chains": ["solana"],
  "version": "1.0.0",
  "author": "Shelfwise",
  "license": "MIT",
  "price": { "type": "free" },
  "entry": "scripts/trades.mjs",
  "runtime": "Node 18+ or Bun, no dependencies",
  "permissions": {
    "network": ["api.mainnet-beta.solana.com"],
    "keys": [],
    "env": ["SOLANA_RPC_URL (optional: your own RPC, faster and fewer rate limits)"],
    "wallet": "none",
    "filesystem": "none"
  },
  "sources": [
    { "name": "Solana RPC: getSignaturesForAddress", "url": "https://solana.com/docs/rpc/http/getsignaturesforaddress" },
    { "name": "Solana RPC: getTransaction", "url": "https://solana.com/docs/rpc/http/gettransaction" }
  ],
  "ask": "What has wallet <address> traded in its last 10 transactions?"
}

MIT License

Copyright (c) 2026 Shelfwise

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

// Wallet recent trades: a Solana wallet's latest transactions as balance changes. Zero dependencies.
import { pathToFileURL } from "node:url";

const PUBLIC_RPC = "https://api.mainnet-beta.solana.com";
const WSOL = "So11111111111111111111111111111111111111112";
const ADDR_RE = /^[1-9A-HJ-NP-Za-km-z]{32,44}$/;
const sleep = (ms) => new Promise((r) => setTimeout(r, ms));

async function rpc(url, method, params) {
  // The public RPC rate-limits hard; back off and retry a few times on 429.
  for (let attempt = 0; ; attempt++) {
    const res = await fetch(url, {
      method: "POST",
      headers: { "content-type": "application/json" },
      body: JSON.stringify({ jsonrpc: "2.0", id: 1, method, params }),
    });
    const body = await res.json().catch(() => null);
    const limited = res.status === 429 || body?.error?.code === 429;
    if (limited && attempt < 4) {
      await sleep(800 * 2 ** attempt);
      continue;
    }
    if (!res.ok || body?.error) throw new Error(body?.error?.message ?? `RPC answered ${res.status}`);
    return body.result;
  }
}

// Net change per asset for one wallet in one parsed transaction. Native SOL and wrapped SOL
// are merged into "SOL"; the network fee is reported separately and not counted as a trade.
export function walletChanges(tx, wallet) {
  const meta = tx?.meta;
  const keys = tx?.transaction?.message?.accountKeys ?? [];
  if (!meta) return null;
  const idx = keys.findIndex((k) => (typeof k === "string" ? k : k?.pubkey) === wallet);
  const feePayer = typeof keys[0] === "string" ? keys[0] : keys[0]?.pubkey;
  const fee = feePayer === wallet ? (meta.fee ?? 0) / 1e9 : 0;
  const deltas = new Map();
  const add = (mint, v) => deltas.set(mint, (deltas.get(mint) ?? 0) + v);
  if (idx >= 0) add("SOL", ((meta.postBalances?.[idx] ?? 0) - (meta.preBalances?.[idx] ?? 0)) / 1e9 + fee);
  const amount = (b) => Number(b?.uiTokenAmount?.uiAmountString ?? b?.uiTokenAmount?.uiAmount ?? 0);
  for (const b of meta.preTokenBalances ?? []) if (b.owner === wallet) add(b.mint === WSOL ? "SOL" : b.mint, -amount(b));
  for (const b of meta.postTokenBalances ?? []) if (b.owner === wallet) add(b.mint === WSOL ? "SOL" : b.mint, amount(b));
  // Ignore dust from rent and rounding: below 0.00001 SOL or 1e-9 of a token.
  const changes = [...deltas]
    .filter(([mint, d]) => Math.abs(d) > (mint === "SOL" ? 1e-5 : 1e-9))
    .map(([mint, delta]) => ({ mint, delta: Number(delta.toPrecision(12)) }));
  const ins = changes.filter((c) => c.delta > 0);
  const outs = changes.filter((c) => c.delta < 0);
  const kind = ins.length >= 1 && outs.length >= 1 ? "swap" : ins.length ? "received" : outs.length ? "sent" : "other";
  return { kind, changes, feeSol: fee, failed: meta.err !== null && meta.err !== undefined };
}

export async function walletTrades(wallet, { limit = 10, rpcUrl = process.env.SOLANA_RPC_URL || PUBLIC_RPC } = {}) {
  if (!ADDR_RE.test(String(wallet ?? ""))) throw new Error("Usage: trades.mjs <wallet address> [--limit 10]");
  limit = Math.max(1, Math.min(20, Number(limit) || 10));
  const sigs = await rpc(rpcUrl, "getSignaturesForAddress", [wallet, { limit }]);
  const items = [];
  for (const s of sigs ?? []) {
    const tx = await rpc(rpcUrl, "getTransaction", [
      s.signature,
      { encoding: "jsonParsed", maxSupportedTransactionVersion: 1, commitment: "confirmed" },
    ]);
    const c = walletChanges(tx, wallet);
    items.push({
      signature: s.signature,
      time: s.blockTime ? new Date(s.blockTime * 1000).toISOString() : null,
      ...(c ?? { kind: "unavailable", changes: [], feeSol: 0, failed: s.err !== null }),
    });
    if (rpcUrl === PUBLIC_RPC) await sleep(250);
  }
  return {
    source: rpcUrl === PUBLIC_RPC ? "solana public rpc" : "your rpc",
    fetchedAt: new Date().toISOString(),
    wallet,
    count: items.length,
    swaps: items.filter((i) => i.kind === "swap" && !i.failed).length,
    transactions: items,
  };
}

if (process.argv[1] && import.meta.url === pathToFileURL(process.argv[1]).href) {
  const args = process.argv.slice(2);
  const i = args.indexOf("--limit");
  walletTrades(args[0], { limit: i >= 0 ? Number(args[i + 1]) : 10 })
    .then((r) => console.log(JSON.stringify(r, null, 2)))
    .catch((e) => {
      console.log(JSON.stringify({ error: String(e?.message ?? e) }));
      process.exit(1);
    });
}

// Self-test: offline maths on a hand-built transaction, then a live read of a busy public
// account (the Raydium AMM authority, which trades every second). Run: node test.mjs
import { pathToFileURL } from "node:url";
import { walletChanges, walletTrades } from "./scripts/trades.mjs";

const W = "Wa11etWa11etWa11etWa11etWa11etWa11etWa11et1";
const MINT = "JUPyiwrYJFskUPiHa7hkeR8VUtAeFoSYbKedZNsDvCN";

export default async function test() {
  const checks = [];
  const check = (name, ok) => checks.push({ name, ok: Boolean(ok) });

  const tx = {
    transaction: { message: { accountKeys: [{ pubkey: W }] } },
    meta: {
      err: null, fee: 5000, preBalances: [2_000_000_000], postBalances: [999_995_000],
      preTokenBalances: [], postTokenBalances: [{ owner: W, mint: MINT, uiTokenAmount: { uiAmountString: "350" } }],
    },
  };
  const c = walletChanges(tx, W);
  check("reads a buy as a swap", c.kind === "swap");
  check("SOL spent excludes the fee", c.changes.find((x) => x.mint === "SOL")?.delta === -1);
  check("token received", c.changes.find((x) => x.mint === MINT)?.delta === 350);

  const r = await walletTrades("5Q544fKrFoe6tsEbD7S8EmxGTJYAKtTVhAW5Q5pge4j1", { limit: 3, rpcUrl: "https://api.mainnet-beta.solana.com" });
  check("returns transactions", r.transactions.length > 0);
  check("each has a signature and kind", r.transactions.every((t) => t.signature && t.kind));
  let rejected = false;
  try { await walletTrades("nope"); } catch { rejected = true; }
  check("rejects a malformed address", rejected);
  return { ok: checks.every((x) => x.ok), checks };
}

if (process.argv[1] && import.meta.url === pathToFileURL(process.argv[1]).href) {
  test().then((r) => { console.log(JSON.stringify(r, null, 2)); process.exit(r.ok ? 0 : 1); },
    (e) => { console.log(JSON.stringify({ ok: false, error: String(e?.message ?? e) })); process.exit(1); });
}