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author_pendingExtrinsics

Description​

Returns all extrinsics currently waiting in the local transaction pool. Use this for diagnostics, custom mempool dashboards, or to detect stuck transactions.

Parameters​

No parameters.

Returns​

Array of SCALE-encoded extrinsics in the pool.

Request Example​

{
  "jsonrpc": "2.0",
  "method": "author_pendingExtrinsics",
  "params": [],
  "id": 1
}

Response Example​

{
  "jsonrpc": "2.0",
  "result": [
    "0x280402000b60e2739f9901d4b3a0e3b88b7c25215926bbf7c733f5c31e69c0c8c4b4a86d6ec3f3f086e95d00"
  ],
  "id": 1
}

Code Examples​

JavaScript​

const pool = await api.rpc.author.pendingExtrinsics();
console.log('Pending extrinsics:', pool.map((ext) => ext.method.section + '.' + ext.method.method));

Python​

pending = substrate.rpc_request('author_pendingExtrinsics', [])["result"]
print('Pending:', len(pending))

Notes​

  • The response reflects only the local node's pool. Other peers may have additional extrinsics.
  • Combine with author_removeExtrinsic (not exposed by default) or restart your node to clear invalid payloads if necessary.