Reports

agent-payments-sdk: what we found

Payment history fails when any agent payment is a version 1 transaction.

Public since 2026-10-30. GitHub issue nirholas/agent-payments-sdk/issues/22 was posted.

Code: nirholas/agent-payments-sdk, their default branch on 2026-10-30. Reported to them: nirholas/agent-payments-sdk/issues/22.

Status: Open: no fix merged yet

Findings

breaks money

Payment history fails when any agent payment is a version 1 transaction

src/solana/PumpAgent.ts (line 326 and the two other calls in the file) reads each payment with connection.getTransaction(sig, { maxSupportedTransactionVersion: 0 }). When a payment is a version 1 transaction, @solana/web3.js throws "Transaction version (1) is not supported by the requesting client", which ends the whole history call. The same code is copied into three.ws and three-ui (agent-payments-sdk/src/...), and events.ts documents the same cap in its example.

Version 1 transactions are a large share of mainnet now (about 40% of non-vote transactions in a block I sampled; 115 of 332 in another), so this depends only on which wallet or SDK built the transaction.

  • src/solana/PumpAgent.ts:326
getTransaction(<v1 signature>, { maxSupportedTransactionVersion: 0 })  -> error -32015 "Transaction version (1) is not supported by the requesting client"
getTransaction(<v1 signature>, { maxSupportedTransactionVersion: 1 })  -> the transaction (version 1, meta present)

Fix: maxSupportedTransactionVersion: 1. @solana/web3.js 1.99.0 or later parses v1 fine with it (tested); 1.98.x rejects a version 1 answer even when asked, so it needs the bump too.

What we measured

WhatResultHowChecked
Reported to themnirholas/agent-payments-sdk/issues/22, posted 2026-10-30https://github.com/nirholas/agent-payments-sdk/issues/22Oct 30, 2026, 3:05 PM UTC
StatusOpen: no fix merged yetGitHub issue nirholas/agent-payments-sdk#22Oct 31, 2026, 1:55 AM UTC

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