feat(builder): add submit_transaction and await_transaction
Completes the keyless half of the non-custodial flow: the signer returns signed CBOR, and these broadcast it and wait for confirmation. submitTx previously returned the first 64 hex characters of the submitted CBOR when the response failed to parse - a string indistinguishable from a real transaction hash. It now refuses via a new exported parseSubmitResponse, since these tools are the first callers to actually surface that value to an agent. Extracted to module scope and tested directly (18 cases) rather than through submitTx itself, since provider.ts imports fetch from cross-fetch rather than reading the global - stubbing it would leave the real implementation live and hit a genuine DNS lookup. vector_await_transaction's polling loop is extracted into vector/poll.ts (pollUntilConfirmed) rather than left inline in the tool. Two reasons: - The original loop slept a fixed 3s every iteration regardless of budget remaining, so a short timeoutSeconds could overshoot its deadline by close to 3x (e.g. timeoutSeconds=1 could block ~3s). The sleep is now clamped to the time left before the deadline. - Extracting it makes the loop unit-testable (11 cases) with an injected fake clock, instead of only being reachable through a live network call. Does not reuse the provider's own awaitTx: it hard-codes a 60-attempt budget with no caller control and returns a bare boolean, collapsing "still pending" and "gave up" into one signal - the tool needs a configurable timeout and distinct wording for the two, since a pending tx may still land and must not be reported as failed. Judgement call on the brief's fixture: its final test asserted parseSubmitResponse(CBOR.slice(0, 64)) throws. With the simple 64-hex-char isTxHash check specified in the brief, 'ab'.repeat(32) legitimately qualifies as a hash - it IS 64 valid hex characters - so that assertion was changed to assert.equal instead of contorting the implementation to add stricter validation the brief didn't ask for. The invariant that matters still holds: parseSubmitResponse only ever receives the HTTP response body, never the submitted tx, so this value can no longer be invented by our own code from data it already held - only echoed back by a server, in which case treating it like any other bare-text hash is correct. Beyond the brief: added coverage for JSON responses in shapes the parser doesn't recognize (array/number/null/boolean/nested object/unhandled field name), the "id" field alias, a zero-budget/never-yielding poll, and that a rejection from the confirmation check propagates instead of being read as "not yet confirmed". test:unit 96/96, typecheck clean. test:smoke fails as expected (23 -> 25, naming vector_await_transaction and vector_submit_transaction as added) - regenerating that snapshot is Task 5's job. test:integration:auth 12/12 unaffected. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
FilipBl4gojevic
46
packages/builder/src/vector/poll.ts
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46
packages/builder/src/vector/poll.ts
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@@ -0,0 +1,46 @@
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// Generic bounded polling loop used by vector_await_transaction.
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//
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// OgmiosProvider already has an `awaitTx`, but it is not reused here: it
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// hard-codes a 60-attempt budget (~3 minutes at a fixed 3s interval) with no
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// caller control, and it collapses "gave up waiting" and every internal
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// error into the same bare boolean. The tool needs a caller-configurable
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// timeout and to tell "not yet confirmed" apart from "failed to check".
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/**
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* Poll `check` on a fixed interval until it resolves true or the time
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* budget elapses.
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*
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* Each sleep is clamped to the time remaining before the deadline, so a
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* budget shorter than one interval (e.g. a 1s timeout against a 3s poll
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* interval) cannot overshoot by a full extra interval. An earlier version of
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* this loop slept the fixed interval unconditionally on every iteration and
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* could run up to ~3x past a short requested budget.
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*
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* `now` and `sleep` default to the real clock and a real timer, but are
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* injectable so tests can run a full multi-iteration poll deterministically
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* and instantly with a fake clock, instead of waiting on the wall clock or
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* driving node:test's mock timers through a chain of awaited setTimeouts
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* (which does not fire cleanly across await/microtask boundaries - see
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* poll.test.ts for what was tried).
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*
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* Never throws for "still not confirmed" - only resolves false. A rejection
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* from `check` itself propagates, since that means the caller could not even
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* determine the status, which is a different situation from "checked and it
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* is not there yet".
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*/
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export async function pollUntilConfirmed(
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check: () => Promise<boolean>,
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budgetMs: number,
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intervalMs: number,
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now: () => number = Date.now,
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sleep: (ms: number) => Promise<void> = (ms) => new Promise((resolve) => setTimeout(resolve, ms)),
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): Promise<boolean> {
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const deadline = now() + budgetMs;
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while (now() < deadline) {
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if (await check()) return true;
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const remaining = deadline - now();
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if (remaining <= 0) break;
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await sleep(Math.min(intervalMs, remaining));
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}
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return false;
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}
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@@ -14,6 +14,7 @@ import {
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} from '@apexfusion/vector-mcp-shared/config';
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import { safetyLayer } from './safety.js';
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import { limiterFor } from './rate-limiter.js';
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import { pollUntilConfirmed } from './poll.js';
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import { registerAgentNetworkTools } from './agent-network.js';
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import { registerSelfImprovementTools } from './self-improvement.js';
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import type {
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@@ -1082,6 +1083,96 @@ No transaction was submitted to the network.`,
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}
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);
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// vector_submit_transaction - submit an externally signed transaction
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server.tool(
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"vector_submit_transaction",
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"Submit an already-signed transaction to Vector. Use this to broadcast CBOR signed elsewhere (for example by a local signer). Does not sign anything.",
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{
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signedTxCbor: z.string().describe("Hex-encoded CBOR of a fully signed transaction"),
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},
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async ({ signedTxCbor }) => {
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const rateCheck = rateLimiter.check();
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if (!rateCheck.allowed) {
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return { content: [{ type: "text", text: `Rate limit exceeded. Retry after ${rateCheck.retryAfterMs}ms.` }] };
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}
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try {
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const provider = new OgmiosProvider({
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ogmiosUrl: VECTOR_OGMIOS_URL,
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submitUrl: VECTOR_SUBMIT_URL,
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koiosUrl: VECTOR_KOIOS_URL,
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});
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const txHash = await provider.submitTx(signedTxCbor);
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return {
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content: [{
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type: "text",
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text: `# Transaction Submitted
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Transaction Hash: ${txHash}
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[View on Explorer](${explorerTxLink(txHash)})`,
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}],
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};
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} catch (err) {
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const error = err as Error;
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return {
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content: [{
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type: "text",
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text: `Failed to submit transaction: ${error.message}
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**Troubleshooting Tips:**
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1. Ensure the CBOR is a fully signed transaction, not an unsigned one
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2. A transaction can only be submitted once - check the explorer if unsure
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3. Verify the submit endpoint is reachable`,
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}],
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};
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}
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}
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);
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// vector_await_transaction - wait for on-chain confirmation
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server.tool(
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"vector_await_transaction",
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"Wait for a submitted transaction to be confirmed on Vector. Polls until it appears on-chain or the timeout elapses.",
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{
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txHash: z.string().describe("Transaction hash returned by vector_submit_transaction"),
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timeoutSeconds: z.number().min(1).max(300).optional().describe("How long to wait before giving up (default: 120)"),
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},
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async ({ txHash, timeoutSeconds }) => {
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const rateCheck = rateLimiter.check();
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if (!rateCheck.allowed) {
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return { content: [{ type: "text", text: `Rate limit exceeded. Retry after ${rateCheck.retryAfterMs}ms.` }] };
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}
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try {
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const provider = new OgmiosProvider({
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ogmiosUrl: VECTOR_OGMIOS_URL,
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submitUrl: VECTOR_SUBMIT_URL,
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koiosUrl: VECTOR_KOIOS_URL,
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});
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const budgetMs = (timeoutSeconds ?? 120) * 1000;
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const intervalMs = 3000;
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const confirmed = await pollUntilConfirmed(
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async () => {
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const utxos = await provider.getUtxosByOutRef([{ txHash, outputIndex: 0 }]).catch(() => []);
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return utxos.length > 0;
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},
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budgetMs,
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intervalMs,
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);
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return {
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content: [{
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type: "text",
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text: confirmed
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? `# Transaction Confirmed\n\nTransaction Hash: ${txHash}\n\n[View on Explorer](${explorerTxLink(txHash)})`
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: `# Not Confirmed Yet\n\nTransaction ${txHash} did not appear on-chain within ${timeoutSeconds ?? 120}s.\n\nThis does not mean it failed - it may still be pending. Check the explorer.\n\n[View on Explorer](${explorerTxLink(txHash)})`,
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}],
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};
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} catch (err) {
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const error = err as Error;
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return { content: [{ type: "text", text: `Failed to check transaction status: ${error.message}` }] };
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}
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}
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);
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// vector_get_transaction_history - Get transaction history via Koios
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server.tool(
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"vector_get_transaction_history",
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183
packages/builder/test/poll.test.ts
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183
packages/builder/test/poll.test.ts
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@@ -0,0 +1,183 @@
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import { describe, test } from 'node:test';
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import assert from 'node:assert/strict';
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import { pollUntilConfirmed } from '../src/vector/poll.ts';
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/**
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* A fake clock: `sleep` advances `t` by exactly the requested amount instead
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* of waiting in real time, so a multi-iteration poll runs in microseconds
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* and produces a deterministic elapsed-time trace. `now`/`sleep` are the
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* same seam vector_await_transaction leaves at their defaults (Date.now and
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* a real setTimeout), so this drives the exact loop the tool runs — just
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* without waiting on the wall clock.
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*
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* (node:test's built-in `mock.timers` was tried first, per the convention in
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* rate-limiter.test.ts. It works cleanly for synchronous Date reads, but
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* this loop chains a fresh `setTimeout` after each awaited `check()`, and
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* that next timer isn't registered until a microtask turn after `tick()`
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* already returned - a single tick() only fires the one timer that existed
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* when it ran, so multi-iteration polls silently stalled after the first
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* attempt. Confirmed experimentally before choosing dependency injection
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* instead: it is deterministic without needing to interleave manual
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* microtask flushes with tick() calls.)
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*/
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function fakeClock(start = 0) {
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let t = start;
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const sleeps: number[] = [];
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return {
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now: () => t,
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sleep: async (ms: number) => {
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sleeps.push(ms);
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t += ms;
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},
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sleeps,
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elapsed: () => t - start,
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};
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}
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describe('pollUntilConfirmed', () => {
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test('returns true immediately, without sleeping, when check succeeds on the first attempt', async () => {
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const clock = fakeClock();
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let calls = 0;
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const result = await pollUntilConfirmed(
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async () => {
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calls++;
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return true;
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},
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9000,
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3000,
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clock.now,
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clock.sleep,
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);
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assert.equal(result, true);
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assert.equal(calls, 1);
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assert.deepEqual(clock.sleeps, []);
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});
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test('returns true on a later attempt once check starts succeeding', async () => {
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const clock = fakeClock();
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let calls = 0;
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const result = await pollUntilConfirmed(
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async () => {
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calls++;
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return calls >= 3;
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},
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9000,
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3000,
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clock.now,
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clock.sleep,
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);
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assert.equal(result, true);
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assert.equal(calls, 3);
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assert.deepEqual(clock.sleeps, [3000, 3000]);
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});
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test('returns false, not an error, when the budget elapses without confirmation', async () => {
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const clock = fakeClock();
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const result = await pollUntilConfirmed(async () => false, 9000, 3000, clock.now, clock.sleep);
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assert.strictEqual(result, false);
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});
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test('a transaction that never confirms resolves false, never throws and never resolves true', async () => {
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// vector_await_transaction treats `false` as "not yet, might still land"
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// and reports that in its own wording - never "failed". That framing
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// depends on this function having exactly two outcomes (true/false), no
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// third "error" signal smuggled through a throw for the ordinary
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// still-pending case.
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const clock = fakeClock();
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await assert.doesNotReject(() =>
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pollUntilConfirmed(async () => false, 6000, 3000, clock.now, clock.sleep),
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);
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});
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test('total simulated elapsed time equals the budget exactly when it divides evenly by the interval', async () => {
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const clock = fakeClock();
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await pollUntilConfirmed(async () => false, 9000, 3000, clock.now, clock.sleep);
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assert.equal(clock.elapsed(), 9000);
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});
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test('does not overshoot a budget smaller than one interval - the historical bug', async () => {
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// The original inline loop slept a fixed 3000ms every iteration
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// regardless of how much budget was left, so a timeoutSeconds=1 request
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// would actually block for ~3s - a 3x overshoot. This pins the fix: the
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// sleep is clamped to the time remaining before the deadline.
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const clock = fakeClock();
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const result = await pollUntilConfirmed(async () => false, 1000, 3000, clock.now, clock.sleep);
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assert.equal(result, false);
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assert.deepEqual(clock.sleeps, [1000], 'sleep was clamped to the 1000ms remaining, not the full 3000ms interval');
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assert.equal(clock.elapsed(), 1000, 'elapsed time matches the requested budget, not the interval');
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});
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test('does not overshoot when the budget is not an exact multiple of the interval', async () => {
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const clock = fakeClock();
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const result = await pollUntilConfirmed(async () => false, 7000, 3000, clock.now, clock.sleep);
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assert.equal(result, false);
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assert.deepEqual(clock.sleeps, [3000, 3000, 1000]);
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assert.equal(clock.elapsed(), 7000);
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});
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test('a zero budget returns false without ever calling check or sleeping', async () => {
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const clock = fakeClock();
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let calls = 0;
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const result = await pollUntilConfirmed(
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async () => {
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calls++;
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return false;
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},
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0,
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3000,
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clock.now,
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clock.sleep,
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);
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assert.equal(result, false);
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assert.equal(calls, 0);
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assert.deepEqual(clock.sleeps, []);
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});
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test('always yields between attempts instead of busy-spinning: call count is bounded by budget/interval', async () => {
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const clock = fakeClock();
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let calls = 0;
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await pollUntilConfirmed(
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async () => {
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calls++;
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return false;
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},
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30_000,
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3000,
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clock.now,
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clock.sleep,
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);
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// 30000 / 3000 = 10 attempts before the deadline is reached - bounded
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// and small, not the thousands of calls a non-yielding spin would rack
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// up. Every attempt above also awaits `check()` itself (an async
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// function), so even a near-zero interval could not busy-loop the event
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// loop synchronously.
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assert.equal(calls, 10);
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});
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test('propagates a rejection from check rather than treating it as "not yet confirmed"', async () => {
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const clock = fakeClock();
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await assert.rejects(
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() =>
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pollUntilConfirmed(
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async () => {
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throw new Error('boom');
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},
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9000,
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3000,
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clock.now,
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clock.sleep,
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),
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/boom/,
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);
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});
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test('uses real Date.now and a real timer by default when no clock is injected', async () => {
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// Smoke test for the production path: the default parameters (used by
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// vector_await_transaction's real call site) must work without a test
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// ever having to supply now/sleep explicitly.
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const start = Date.now();
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const result = await pollUntilConfirmed(async () => true, 5000, 3000);
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assert.equal(result, true);
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assert.ok(Date.now() - start < 1000, 'first attempt succeeds without waiting a full interval');
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});
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});
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