+
+
+ {openModal === 'from' && (
+
+ setOpenModal('from')}
+ error={fromError?.message}
+ />
+
+ setOpenModal('to')}
+ approximate
+ />
+
+
+ Swap
+
+
+
+
+
+ );
+}
diff --git a/src/problem2/src/components/TokenInput.tsx b/src/problem2/src/components/TokenInput.tsx
new file mode 100644
index 000000000..c2262bc3f
--- /dev/null
+++ b/src/problem2/src/components/TokenInput.tsx
@@ -0,0 +1,110 @@
+import type { Token } from '../types';
+import { TokenIcon } from './TokenSelectorModal';
+import { formatUSD } from '../utils/format';
+import { DECIMAL_NUMBER_REGEX, KEY_ARROW_UP, KEY_ARROW_DOWN } from '../constants';
+
+interface TokenInputProps {
+ label: string;
+ amount: string;
+ onAmountChange: (value: string) => void;
+ token: Token | null;
+ onTokenSelect: () => void;
+ error?: string;
+ disabled?: boolean;
+ approximate?: boolean;
+}
+
+export default function TokenInput({
+ label,
+ amount,
+ onAmountChange,
+ token,
+ onTokenSelect,
+ error,
+ disabled,
+ approximate,
+}: TokenInputProps) {
+ const handleChange = (e: React.ChangeEvent
+ {/* Label */}
+
+ );
+}
diff --git a/src/problem2/src/components/TokenSelectorModal.tsx b/src/problem2/src/components/TokenSelectorModal.tsx
new file mode 100644
index 000000000..e3c4b5757
--- /dev/null
+++ b/src/problem2/src/components/TokenSelectorModal.tsx
@@ -0,0 +1,230 @@
+import { useState, useEffect, useRef, useCallback } from "react";
+import type { Token } from "../types";
+import { formatUSD } from "../utils/format";
+
+interface TokenSelectorModalProps {
+ onClose: () => void;
+ tokens: Token[];
+ selectedToken: Token | null;
+ onSelect: (token: Token) => void;
+}
+
+function TokenIcon({ token, size = 32 }: { token: Token; size?: number }) {
+ const [hasError, setHasError] = useState(false);
+
+ if (hasError) {
+ return (
+
+ {label}
+
+
+
+ {/* Amount input */}
+
+
+
+
+ {/* Token selector badge */}
+
+
+ {approximate && amount && (
+ ≈
+ )}
+
+
+
+ {token && amount && parseFloat(amount) > 0 ? (
+ ≈{formatUSD(usdValue)}
+ ) : error ? (
+ {error}
+ ) : null}
+
+
+ {token.currency.charAt(0)}
+
+ );
+ }
+
+ return (
+
+
+ );
+}
diff --git a/src/problem2/src/components/TransactionHistory.tsx b/src/problem2/src/components/TransactionHistory.tsx
new file mode 100644
index 000000000..7f40040bc
--- /dev/null
+++ b/src/problem2/src/components/TransactionHistory.tsx
@@ -0,0 +1,62 @@
+import { useState, useEffect } from 'react';
+import type { Transaction } from '../types';
+import { formatAmount, timeAgo } from '../utils/format';
+
+interface TransactionHistoryProps {
+ transactions: Transaction[];
+}
+
+function TransactionRow({ tx }: { tx: Transaction }) {
+ const [, setTick] = useState(0);
+
+ useEffect(() => {
+ const interval = setInterval(() => setTick((t) => t + 1), 10000);
+ return () => clearInterval(interval);
+ }, []);
+
+ return (
+ e.stopPropagation()}
+ onKeyDown={handleKeyDown}
+ >
+ {/* Header */}
+
+
+
+
+ {/* Search */}
+ + Select a token +
+ +
+
+
+ {/* Token list */}
+
+
+ setSearch(e.target.value)}
+ placeholder="Search token name..."
+ className="w-full bg-gray-50 border border-gray-200 rounded-xl py-2.5 pl-10 pr-4 text-gray-900 placeholder-gray-400 text-sm outline-none focus:border-blue-400 focus:ring-2 focus:ring-blue-100 transition-all"
+ />
+
+
+ {filtered.length === 0 ? (
+
+
+ No tokens found
+
+ ) : (
+ filtered.map((token, index) => {
+ const isSelected = selectedToken?.currency === token.currency;
+ const isHighlighted = index === highlightIndex;
+ return (
+
+ );
+ })
+ )}
+
+
+ );
+}
+
+export default function TransactionHistory({ transactions }: TransactionHistoryProps) {
+ if (transactions.length === 0) return null;
+
+ return (
+
+
+
+
+
+
+
+
+ {tx.fromToken} → {tx.toToken}
+
+
+ {formatAmount(tx.fromAmount)} {tx.fromToken} for {formatAmount(tx.toAmount)} {tx.toToken}
+
+
+
+ Completed
+
+
+ {timeAgo(tx.timestamp)}
+
+
+ );
+}
diff --git a/src/problem2/src/constants/index.ts b/src/problem2/src/constants/index.ts
new file mode 100644
index 000000000..4a90f4e10
--- /dev/null
+++ b/src/problem2/src/constants/index.ts
@@ -0,0 +1,6 @@
+export const DEFAULT_AMOUNT = '0.1';
+export const DECIMAL_NUMBER_REGEX = /^[0-9]*\.?[0-9]*$/;
+export const KEY_ARROW_UP = 'ArrowUp';
+export const KEY_ARROW_DOWN = 'ArrowDown';
+export const MSG_SWAP_SUCCESS = 'Swap Successful!';
+export const MSG_EXCHANGE = 'Exchange';
diff --git a/src/problem2/src/hooks/usePrices.ts b/src/problem2/src/hooks/usePrices.ts
new file mode 100644
index 000000000..c9ab03867
--- /dev/null
+++ b/src/problem2/src/hooks/usePrices.ts
@@ -0,0 +1,42 @@
+import { useQuery } from '@tanstack/react-query';
+import type { PriceEntry, Token } from '../types';
+
+const ICON_BASE = 'https://raw.githubusercontent.com/Switcheo/token-icons/main/tokens';
+
+function deduplicatePrices(entries: PriceEntry[]): Token[] {
+ const grouped = new Map
+
+ Recent Transactions
+
+ {transactions.map((tx) => (
+
+
+ {rows}
+
+ );
+};
+```
diff --git a/src/problem4/.keep b/src/problem4/.keep
deleted file mode 100644
index e69de29bb..000000000
diff --git a/src/problem5/.keep b/src/problem5/.keep
deleted file mode 100644
index e69de29bb..000000000