ETH DeFi USDT Transfer
操作流程：
Step 1: Approve（授权合约花费 USDT）
Step 2: 等待 Approve 交易上链确认
Step 3: Transfer（执行 USDT 转账）
MetaMask Wallet
Connect MetaMask
Step 1: Approve USDT
From Address (MetaMask connected wallet)
Amount (USDT, 0 = unlimited approve)
Approve via MetaMask
Step 2: DeFi Transfer
From Address (USDT 来源)
To Address (USDT 接收方)
Amount (USDT)
Transfer
Query Balance & Allowance
Address
Query
Query Transaction
Transaction Hash
Query