diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 9adb7df..a544bf0 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -37,6 +37,39 @@ npm run build
`npm run e2e:testnet` is an optional, read-only check against a running
backend and live testnet; see the header of `e2e/testnet.e2e.test.ts`.
+## Measuring realtime feeds
+
+Use separate terminals:
+
+```bash
+node scripts/realtime-burst.mjs --manual --port 4310
+NEXT_PUBLIC_API_URL=http://localhost:4310/api/v1 npm run dev
+```
+
+Open `/markets?profile=1` or `/?profile=1` and keep that tab visible.
+Development-only React Profiler logs `[realtime-profile]`, the component
+name, commit count and total `actualDuration` every second. Let the page
+settle, then trigger each sample from another terminal:
+
+```bash
+curl 'http://localhost:4310/burst?count=500&rate=500'
+# Wait for completion before starting the next sample.
+curl 'http://localhost:4310/burst?count=500&rate=50'
+```
+
+Sum logged intervals covering each burst and its final settling interval.
+Use the same browser, viewport and animation preference for both revisions.
+For a baseline, instrument the original feed with the same profiler wrapper;
+the original feeds need no functional changes. Profiler time measures React
+render work, not socket validation, paint, or end-to-end latency. Slow
+baselines may coalesce events under load, so fewer commits alone do not
+prove better responsiveness. Production ignores `?profile=1`.
+
+The simulator serves an empty market API and emits synthetic public trades;
+it never signs or submits transactions. `--count`, `--rate` and `--port` also
+configure its automatic burst (omit `--manual` to emit after the first
+connection). See [docs/STATUS.md](docs/STATUS.md) for measured results.
+
## When the contracts change
The contracts live in
diff --git a/app/copy-trade/page.tsx b/app/copy-trade/page.tsx
index 8b58598..ade7e66 100644
--- a/app/copy-trade/page.tsx
+++ b/app/copy-trade/page.tsx
@@ -1,5 +1,10 @@
"use client";
+import { TxReview, TxReviewPreferenceControl, shouldSkipTxReview } from "@/components/tx-review";
+import type { ReviewModel } from "@/lib/stellar/tx-decode";
+import { useSubmitQueueState } from "@/lib/stellar/submit-queue";
+
+
import React, { useState, useRef, useEffect, useCallback, Suspense } from "react";
import { useSearchParams, useRouter } from "next/navigation";
import { useWallet } from "@/lib/contexts/WalletContext";
@@ -7,12 +12,15 @@ import { getTrace, ReasoningTrace } from "@/lib/api/traces";
import { confirmCopyTrade, initiateCopyTrade } from "@/lib/api/trade";
import { ApiError } from "@/lib/api/client";
import { useMarket } from "@/lib/hooks/useMarkets";
-import { useBuy, useQuoteBuy, useUsdcBalance, useAccountReserve, usePrepareBuy } from "@/lib/hooks/useStellar";
+import { useBuy, useQuoteBuy, useUsdcBalance, useAccountReserve, usePrepareBuy, useOnChainMarket, fetchOnChainMarket, useUsdcTrustline, useEnableUsdc, useUsdcBalanceState, type PreparedWriteReview } from "@/lib/hooks/useStellar";
import { explorerTx } from "@/lib/stellar/config";
import { formatUsdc, formatXlm, minOut, shareOf } from "@/lib/stellar/units";
import { TxPhase } from "@/lib/stellar/tx-lifecycle";
/** Wait this long after the slider stops before asking for a new quote. */
+import { getLedgerNow, useLedgerNow } from "@/lib/stellar/ledger-clock";
+import { MIN_TX_TIMEOUT_S, SAFETY_MARGIN_S } from "@/lib/stellar/deadline";
+import { PendingValue } from "@/components/pending-value";
const QUOTE_DEBOUNCE_MS = 400;
function renderTxPhase(phase: TxPhase): string | null {
@@ -60,6 +68,13 @@ function CopyTradeContent() {
const onChainMarket = useOnChainMarket(onChainMarketId);
const balance = useUsdcBalance(address);
+ const balanceState = useUsdcBalanceState(address);
+ const ledger = useLedgerNow();
+ const trustline = useUsdcTrustline(address);
+ const enableUsdc = useEnableUsdc();
+ const trustlineMissing = trustline.data?.kind === "missing";
+ const trustlineReady = trustline.data?.kind === "native" || (trustline.data?.kind === "present" && trustline.data.authorized);
+ const marketCanTrade = onChainMarket.data?.market.status.tag === "Open" && ledger.now !== null && Number(onChainMarket.data.market.close_time) - ledger.now > SAFETY_MARGIN_S + MIN_TX_TIMEOUT_S;
const reserve = useAccountReserve(address);
const buy = useBuy();
const submitQueue = useSubmitQueueState(address);
@@ -241,6 +256,7 @@ function CopyTradeContent() {
collateralIn: amountRaw,
slippageBps,
prepared: prepareBuy.data,
+ review: reviewPreparedBuy,
});
if (result.txHash) await confirmCopyTrade(copyTradeId, result.txHash).catch(() => undefined);
@@ -362,7 +378,7 @@ function CopyTradeContent() {