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Program Simulator

Step through Anchor instruction execution and see account checks, state updates, and failure reasons.

Execution Timeline

Watch each constraint check and see what the runtime validates.

Progress0/4 steps

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Step 1

Verify Signer

Next

Confirm the payer signed the transaction.

#[account(signer)]
Step 2

Derive PDA

Pending

Derive the PDA used to store program state.

#[account(seeds = ..., bump)]
Step 3

Write Account Data

Pending

Serialize and store the new state.

#[account(mut)]
Step 4

Emit Event

Pending

Publish an event for indexers and clients.

emit!(...) (no constraint)

Execution Stage

Visualize how the instruction touches signers, PDAs, and state accounts.

1
Verify Signer
2
Derive PDA
3
Write Account Data
4
Emit Event
Latest Log

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State Change

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Verify Signer

    Program Simulator | LearnSol | learn.sol