Simulate sending a transaction
$ curl https://api.devnet.solana.com -s -X \> POST -H "Content-Type: application/json" -d '> {> "jsonrpc": "2.0",> "id": 1,> "method": "simulateTransaction",> "params": [> "AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAEEjNmKiZGiOtSZ+g0//wH5kEQo3+UzictY+KlLV8hjXcs44M/Xnr+1SlZsqS6cFMQc46yj9PIsxqkycxJmXT+veJjIvefX4nhY9rY+B5qreeqTHu4mG6Xtxr5udn4MN8PnBt324e51j94YQl285GzN2rYa/E2DuQ0n/r35KNihi/zamQ6EeyeeVDvPVgUO2W3Lgt9hT+CfyqHvIa11egFPCgEDAwIBAAkDZAAAAAAAAAA=",> {> "commitment": "confirmed",> "encoding": "base64",> "replaceRecentBlockhash": true> }> ]> }> '
params
stringrequired
Transaction, as an encoded string.
The transaction must have a valid blockhash, but is not required to be signed.
objectoptional
Configuration object containing the following fields:
result
Response
{"jsonrpc": "2.0","result": {"context": {"apiVersion": "2.3.3","slot": 393226680},"value": {"accounts": null,"err": null,"innerInstructions": null,"loadedAccountsDataSize": 413,"logs": ["Program TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb invoke [1]","Program log: Instruction: Transfer","Program TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb consumed 1714 of 200000 compute units","Program TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb success"],"replacementBlockhash": {"blockhash": "6oFLsE7kmgJx9PjR4R63VRNtpAVJ648gCTr3nq5Hihit","lastValidBlockHeight": 381186895},"returnData": null,"unitsConsumed": 1714}},"id": 1}
object
The result will contain:
Example Result
- The
JsonParsedexample shows the simulation result for a transaction that creates an associated token account. - The
Jsonexample shows the simulation result for a transaction with a CPI (innerInstructions) that can't be parsed.
{"jsonrpc": "2.0","result": {"context": {"apiVersion": "3.0.10","slot": 1282},"value": {"accounts": null,"err": null,"fee": 5000,"innerInstructions": [{"index": 0,"instructions": [{"parsed": {"info": {"extensionTypes": ["immutableOwner"],"mint": "AH2uKiJxRXuQbUZQpCoyeujLLKNHvUATXxBVEBWMof92"},"type": "getAccountDataSize"},"program": "spl-token","programId": "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","stackHeight": 2},{"parsed": {"info": {"lamports": 2039280,"newAccount": "Bgig53phxYuoiB2mveeBYGs9WpQPoUCJfDBGwpgWnkP","owner": "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","source": "23g1K6sr2bevNwLYPoB79jzEQtErioYQ8mpUa76xA6yu","space": 165},"type": "createAccount"},"program": "system","programId": "11111111111111111111111111111111","stackHeight": 2},{"parsed": {"info": {"account": "Bgig53phxYuoiB2mveeBYGs9WpQPoUCJfDBGwpgWnkP"},"type": "initializeImmutableOwner"},"program": "spl-token","programId": "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","stackHeight": 2},{"parsed": {"info": {"account": "Bgig53phxYuoiB2mveeBYGs9WpQPoUCJfDBGwpgWnkP","mint": "AH2uKiJxRXuQbUZQpCoyeujLLKNHvUATXxBVEBWMof92","owner": "23g1K6sr2bevNwLYPoB79jzEQtErioYQ8mpUa76xA6yu"},"type": "initializeAccount3"},"program": "spl-token","programId": "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","stackHeight": 2}]}],"loadedAccountsDataSize": 238800,"loadedAddresses": {"readonly": [],"writable": []},"logs": ["Program ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL invoke [1]","Program log: Create","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [2]","Program log: Instruction: GetAccountDataSize","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 1595 of 193103 compute units","Program return: TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA pQAAAAAAAAA=","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA success","Program 11111111111111111111111111111111 invoke [2]","Program 11111111111111111111111111111111 success","Program log: Initialize the associated token account","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [2]","Program log: Instruction: InitializeImmutableOwner","Program log: Please upgrade to SPL Token 2022 for immutable owner support","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 1405 of 186490 compute units","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA success","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [2]","Program log: Instruction: InitializeAccount3","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 4214 of 182608 compute units","Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA success","Program ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL consumed 21889 of 200000 compute units","Program ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL success"],"postBalances": [996484120,2039280,1,1461600,731913600,929020800],"postTokenBalances": [{"accountIndex": 1,"mint": "AH2uKiJxRXuQbUZQpCoyeujLLKNHvUATXxBVEBWMof92","owner": "23g1K6sr2bevNwLYPoB79jzEQtErioYQ8mpUa76xA6yu","programId": "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","uiTokenAmount": {"amount": "0","decimals": 2,"uiAmount": 0.0,"uiAmountString": "0"}}],"preBalances": [998528400,0,1,1461600,731913600,929020800],"preTokenBalances": [],"replacementBlockhash": {"blockhash": "3ojhhRUVJAfsFhaJ3ka7cmwmAHQizYWvDtykiSVVnnET","lastValidBlockHeight": 1432},"returnData": null,"unitsConsumed": 21889}},"id": 1}
Is this page helpful?