Transaction States and Errors

API entities, such as transactions and challenges, are processed asynchronously after the initial POST request.

As the request is processed, the transaction's state, or the challenge's status, will update accordingly. This update can be retrieved either by polling the associated GET endpoint or via subscribing to notifications (recommended).

Transaction States

Transactions go through various states after initiation to indicate if they’ve begun processing, are identifiable on the blockchain, complete, failed, and more.

Specific actions, like canceling or accelerating a transaction, can only be taken when a transaction is in a specific state.

Canceling a transaction can only occur when a transaction is in the INITIATED, QUEUED, or SENT states.

Accelerating a transaction can only occur when a transaction is in the SENT state.

If a transaction cannot be successfully completed, it will enter the FAILED state and have an accompanying errorReason detailing the failure.

The following state diagram shows the flow for transaction states:

The following table describes the possible states of a transaction:

State	Description
INITIATED	The transaction has been initiated.
QUEUED	The transaction is in the processing queue.
PENDING_RISK_SCREENING	The transaction is waiting for risk screening.
SENT	The transaction has been identified in the Mempool and assigned a transaction hash. The transaction may be accelerated at this stage.
CONFIRMED	The transaction has been identified on a mined block. The transaction can no longer be canceled.
COMPLETE	Terminal State. The transaction has successfully completed.
CANCELED	Terminal State. The transaction has been canceled and must be re-initiated.
FAILED	Terminal State. The transaction has failed. The transaction must be re-initiated.
DENIED	Terminal State. The platform denies the transaction. For a detailed reason, refer to the errorReason.
ACCELERATED	The transaction has been accelerated.

Transaction Errors

If a transaction cannot be completed and enters the FAILED state, the transaction object will have a related errorReason to describe the failure.

Error Reason	Description
`ESTIMATION_ERROR`	The transaction estimation failed during node execution.
`INSUFFICIENT_NATIVE_TOKEN`	The wallet does not have a sufficient balance of the blockchain’s native asset to cover the gas fees needed for all pending transactions.
`ABI_SIGNATURE_PARAMS_MISMATCH`	The signature and parameter of ABI are mismatched.
`FEE_EXCEEDS_MAX_ALLOWANCE`	The fee exceeds the max allowance. There is one native token fee limit to prevent any unintended transaction from being sent out.
`QUERY_NFT_METADATA_ERROR`	The NFT metadata cannot be found.
`GAS_LIMIT_TOO_LOW`	The provided fee tolerance (`gasLimit`) was too low to complete the requested transaction.
`TRANSACTION_UNDER_PRICE`	The transaction's max fee or priority fee is lower than the current lowest max fee or priority fee in mempool when mempool is full.
`FAILED_ON_CHAIN`	The transaction failed to be processed by the blockchain.
`FAILED_REORG`	The transaction was dropped because of blockchain re-org.
`INTERNAL_ERROR`	The transaction failed due to an internal error.
`PAYMASTER_POLICY_NOT_ACTIVATED`	The paymaster policy hasn't been set or activated.
`PAYMASTER_POLICY_EXCEED_MAX_DAILY_TRANSACTIONS`	The maximum number of daily transactions allowed by the paymaster policy has been reached. Please try again tomorrow or update the policy limits.
`PAYMASTER_POLICY_EXCEED_MAX_SPEND_USD_PER_TX`	The transaction exceeds the maximum allowable spend in USD as per the paymaster policy for a single transaction. Please increase the limits in your policy for such transactions to go through.
`PAYMASTER_POLICY_EXCEED_MAX_SPEND_USD_DAILY`	The maximum daily spending limit in USD set by the paymaster policy has been reached. Please try again tomorrow or update the policy limits.
`PAYMASTER_POLICY_EXCEED_MAX_NATIVE_TOKEN_DAILY`	The maximum daily spending limit for native tokens set by the paymaster policy has been reached. Please try again tomorrow or update the policy limits.
`PAYMASTER_POLICY_SENDER_IN_BLOCKLIST`	The sender wallet of the transaction is blocked by the paymaster policy. Update the policy blocklist to allow this user to go through.
`PAYMASTER_ENTITY_RESTRICTION`	At this time, your account is restricted from using Gas Station. Go to the Web3 Services Console Paymaster page to learn more.

Challenge States

Challenges go through several statuses to indicate if it has been presented to the user, have been completed, and more.

If a challenge cannot be successfully completed, it will enter the FAILED state, and have an accompanying errorCode and errorMessage detailing the failure.

Status	Description
PENDING	The request has been created but has not yet been approved by the user.
IN_PROGRESS	The user has approved the request, and it is being executed.
COMPLETED	The request is complete.
FAILED	The request has failed to execute. The request must be re-initiated.
EXPIRED	The request has expired. The request must be re-initiated.