Agent wallet ops on Base

The boring-but-critical primitives that keep an autonomous wallet safe.

Reads

• Balances — ETH for gas + any ERC-20 by address (6 vs 18 decimals matters).
• Gas — estimate the tx, add a 20% buffer, and refuse if the cost exceeds a caller cap.
• Nonce — read pending vs latest; warn on a stuck tx before sending another.

Writes

• Approve the exact amount to a named spender — never type(uint256).max by default.
• Transfer with a confirmation summary (to, token, amount, USD value) before broadcasting.

Safety rails

• Hard daily-spend cap per token; block transfers to brand-new (zero-history) addresses unless confirmed.
• Always re-read balance after a send (public RPCs lag — don't trust a stale read).

Output

{ action, token, amount, gasEstimate, nonce, calldata, warnings[] }