t2000: Swap Tokens

Purpose

Convert between tokens at the best available rate. Cetus Aggregator routes across 20+ DEXs and picks the lowest-price-impact path. Slippage defaults to 1%; configurable up to 5%.

Swaps are NOT gasless. Unlike t2 send USDC / t2 send USDsui, Cetus swap transactions require SUI for gas (typically < $0.01 per swap). Ensure the wallet holds a small SUI balance before swapping.

Rules

1. Preview before signing. Always run t2 swap <amount> <from> <to> --quote (or call t2000_swap in dry-run via the MCP) and surface priceImpact + toAmount to the user before broadcasting.
2. Decline obviously bad swaps. If priceImpact > 0.5% (50 bps), warn the user and require explicit confirmation. If priceImpact > 5%, refuse — that's almost certainly a thin-liquidity trap.
3. One swap per intent. Cetus aggregator handles multi-hop internally; don't chain swap calls.
4. Don't auto-decide stables. If the user says "swap to USD", ASK whether USDC or USDsui — they're both Sui-native stables.
5. Limits apply to every swap (CLI and MCP). Limits are on by default ($25/tx · $100/day); if the swap exceeds a cap (on the from-side USD value) the write throws LIMIT_EXCEEDED. Use --force (CLI) to override one time.

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