base_transactionStatus

Checks whether a transaction is in the node mempool. Only available on Flashblocks endpoints.

Checks whether a specific transaction is present in the node’s mempool. Use this to confirm that a submitted transaction has been received before it appears in a Flashblock.

Only available on Flashblocks endpoints: https://mainnet.base.org / https://sepolia.base.org.

Requires base/base minimum client version v0.3.0.

Parameters

transactionHash · string · required

The 32-byte transaction hash to query.

Returns

result · object

Transaction status object.

Show Status fields

status · string

"Known" if the transaction is present in the mempool. "Unknown" if it has not been seen by this node.

Example

cURL

curl https://mainnet.base.org \
  -X POST -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"base_transactionStatus","params":["0xabc123..."],"id":1}'

{"jsonrpc": "2.0", "id": 1, "result": {"status": "Known"}}

{"jsonrpc": "2.0", "id": 1, "result": {"status": "Unknown"}}