txpool

The txpool API gives access to several non-standard RPC methods to inspect the contents of the transaction pool containing all the currently pending transactions as well as the ones queued for future processing.

txpool_content

The content inspection property can be queried to list the exact details of all the transactions currently pending for inclusion in the next block(s), as well as the ones that are being scheduled for future execution only.

The result is an object with two fields pending and queued. Each of these fields are associative arrays, in which each entry maps an origin-address to a batch of scheduled transactions. These batches themselves are maps associating nonces with actual transactions.

Please note, there may be multiple transactions associated with the same account and nonce. This can happen if the user broadcast multiple ones with varying gas allowances (or even completely different transactions).

CLIENT
METHOD INVOCATION

Go

txpool.Content() (map[string]map[string]map[string]*RPCTransaction)

Console

txpool.content

RPC

{"method": "txpool_content"}

Example:

> txpool.content
{
  pending: {
    0x0216d5032f356960cd3749c31ab34eeff21b3395: {
      806: {
        blockHash: "0x0000000000000000000000000000000000000000000000000000000000000000",
        blockNumber: null,
        from: "0x0216d5032f356960cd3749c31ab34eeff21b3395",
        gas: "0x5208",
        gasPrice: "0xba43b7400",
        hash: "0xaf953a2d01f55cfe080c0c94150a60105e8ac3d51153058a1f03dd239dd08586",
        input: "0x",
        nonce: "0x326",
        to: "0x7f69a91a3cf4be60020fb58b893b7cbb65376db8",
        transactionIndex: null,
        value: "0x19a99f0cf456000"
      }
    },
    0x24d407e5a0b506e1cb2fae163100b5de01f5193c: {
      34: {
        blockHash: "0x0000000000000000000000000000000000000000000000000000000000000000",
        blockNumber: null,
        from: "0x24d407e5a0b506e1cb2fae163100b5de01f5193c",
        gas: "0x44c72",
        gasPrice: "0x4a817c800",
        hash: "0xb5b8b853af32226755a65ba0602f7ed0e8be2211516153b75e9ed640a7d359fe",
        input: "0xb61d27f600000000000000000000000024d407e5a0b506e1cb2fae163100b5de01f5193c00000000000000000000000000000000000000000000000053444835ec580000000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
        nonce: "0x22",
        to: "0x7320785200f74861b69c49e4ab32399a71b34f1a",
        transactionIndex: null,
        value: "0x0"
      }
    }
  },
  queued: {
    0x976a3fc5d6f7d259ebfb4cc2ae75115475e9867c: {
      3: {
        blockHash: "0x0000000000000000000000000000000000000000000000000000000000000000",
        blockNumber: null,
        from: "0x976a3fc5d6f7d259ebfb4cc2ae75115475e9867c",
        gas: "0x15f90",
        gasPrice: "0x4a817c800",
        hash: "0x57b30c59fc39a50e1cba90e3099286dfa5aaf60294a629240b5bbec6e2e66576",
        input: "0x",
        nonce: "0x3",
        to: "0x346fb27de7e7370008f5da379f74dd49f5f2f80f",
        transactionIndex: null,
        value: "0x1f161421c8e0000"
      }
    },
    0x9b11bf0459b0c4b2f87f8cebca4cfc26f294b63a: {
      2: {
        blockHash: "0x0000000000000000000000000000000000000000000000000000000000000000",
        blockNumber: null,
        from: "0x9b11bf0459b0c4b2f87f8cebca4cfc26f294b63a",
        gas: "0x15f90",
        gasPrice: "0xba43b7400",
        hash: "0x3a3c0698552eec2455ed3190eac3996feccc806970a4a056106deaf6ceb1e5e3",
        input: "0x",
        nonce: "0x2",
        to: "0x24a461f25ee6a318bdef7f33de634a67bb67ac9d",
        transactionIndex: null,
        value: "0xebec21ee1da40000"
      },
      6: {
        blockHash: "0x0000000000000000000000000000000000000000000000000000000000000000",
        blockNumber: null,
        from: "0x9b11bf0459b0c4b2f87f8cebca4cfc26f294b63a",
        gas: "0x15f90",
        gasPrice: "0x4a817c800",
        hash: "0xbbcd1e45eae3b859203a04be7d6e1d7b03b222ec1d66dfcc8011dd39794b147e",
        input: "0x",
        nonce: "0x6",
        to: "0x6368f3f8c2b42435d6c136757382e4a59436a681",
        transactionIndex: null,
        value: "0xf9a951af55470000"
      }
    }
  }
}

txpool_contentFrom

Retrieves the transactions contained within the txpool, returning pending as well as queued transactions of this address, grouped by nonce.

CLIENT
METHOD INVOCATION

Console

txpool.contentFrom(address)

RPC

{"method": "txpool_contentFrom, "params": [string]"}

txpool_inspect

The inspect inspection property can be queried to list a textual summary of all the transactions currently pending for inclusion in the next block(s), as well as the ones that are being scheduled for future execution only. This is a method specifically tailored to developers to quickly see the transactions in the pool and find any potential issues.

The result is an object with two fields pending and queued. Each of these fields are associative arrays, in which each entry maps an origin-address to a batch of scheduled transactions. These batches themselves are maps associating nonces with transactions summary strings.

Please note, there may be multiple transactions associated with the same account and nonce. This can happen if the user broadcast multiple ones with varying gas allowances (or even completely different transactions).

CLIENT
METHOD INVOCATION

Go

txpool.Inspect() (map[string]map[string]map[string]string)

Console

txpool.inspect

RPC

{"method": "txpool_inspect"}

Example:

txpool_status

The status inspection property can be queried for the number of transactions currently pending for inclusion in the next block(s), as well as the ones that are being scheduled for future execution only.

The result is an object with two fields pending and queued, each of which is a counter representing the number of transactions in that particular state.

CLIENT
METHOD INVOCATION

Go

txpool.Status() (map[string]*rpc.HexNumber)

Console

txpool.status

RPC

{"method": "txpool_status"}

Example:

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