Binance Web3 Wallet throws replacement transaction underpriced.
Ethereum lets you replace a pending transaction with a new one using the same nonce, but the new gas price must be at least 10% higher — otherwise nodes reject it outright. So this error almost always means one thing: you didn’t bump gas enough to override the previous tx.
Options:
- Bump gas by 10%+ and resubmit
- Wait for the pending tx to confirm if you’re not in a hurry
- To cancel a stuck tx: send a 0 ETH self-transfer with the same nonce and a higher gas price — an empty tx that squeezes out the old one