Proposal: Transaction Simulation — preview before signing

[grikomsn]

Summary

Add transaction simulation capabilities so users can preview transaction results before signing, preventing failed transactions and enabling accurate gas estimation.

Proposed API

const simulation = await useSimulateTransaction({
  type: "send",
  amount: "1000",
  denom: "uatom",
  to: recipientAddress,
});

// simulation.success, simulation.gasUsed, simulation.events

Motivation

• Prevent failed transactions
• Accurate gas estimation
• Better UX
• Cost savings

Source

Originally proposed in notes/legacy/IMPROVEMENT_DESIGN.md (Section 6).

Priority: Low | Effort: Medium | Status: Proposed

[codingki]

yes