🛟 CDK Erigon RPC Methods

CDK-Erigon RPC Methods

Transaction Pool (txpool)

txpool_content

Description:

Returns details of all pending and queued transactions in the transaction pool.

Parameters:

None

Response:

Returns an object containing:

• pending – A list of transactions waiting to be included in a block.
• queued – A list of transactions that are queued due to nonce gaps.

Example:

{
  "pending": { "0xSenderAddress": [{ "to": "0xReceiver", "value": "0x10" }] },
  "queued": { "0xSenderAddress": [{ "to": "0xReceiver", "value": "0x20" }] }
}

txpool_contentFrom

Description:

Fetches all pending and queued transactions from a specific sender.

Parameters:

• address (string): The sender’s Ethereum address.

Response:

Returns the list of transactions originating from the specified sender.

Example:

{
  "pending": [{ "to": "0xReceiver", "value": "0x10" }],
  "queued": [{ "to": "0xReceiver", "value": "0x20" }]
}

txpool_limbo

Description:

Returns transactions that are stuck in limbo due to missing dependencies or nonce gaps.

Parameters:

None

Response:

Returns an array of transactions that are unprocessable.

Example:

{
  "limbo": [{ "from": "0xSender", "nonce": 5, "to": "0xReceiver" }]
}

zkEVM Methods (zkevm)

zkevm_batchNumber

Description:

Returns the latest batch number finalized on L1.

Parameters:

None

Response:

• batchNumber (integer): The latest verified batch.

Example:

{
  "batchNumber": 10045
}

zkevm_batchNumberByBlockNumber

Description:

Fetches the batch number corresponding to a specific block number.

Parameters:

• blockNumber (integer): The L2 block number.

Response:

• batchNumber (integer): The batch associated with the block.

Example:

{
  "batchNumber": 9998
}

zkevm_consolidatedBlockNumber

Description:

Retrieves the latest L2 block that has been consolidated.

Parameters:

None

Response:

• blockNumber (integer): The latest consolidated L2 block.

Example:

{
  "blockNumber": 105432
}

zkevm_estimateCounters

Description:

Estimates the counter usage for a given transaction, similar to estimateGas but for zkEVM.

Parameters:

• transaction (object): The transaction object to analyze.

Response:

• counterEstimate (integer): Estimated zk-counter usage.

Example:

{
  "counterEstimate": 25000
}

zkevm_getBatchByNumber

Description:

Returns details about a specific batch by its number.

Parameters:

• batchNumber (integer): The batch ID to fetch.

Response:

Batch details, including block range, state root, and L1 commitment status.

Example:

{
  "batch": {
    "batchNumber": 10045,
    "blockRange": "100430-100450",
    "stateRoot": "0xabcdef"
  }
}

zkevm_getBatchCountersByNumber

Description:

Retrieves the counter usage details of a specific batch.

Parameters:

• batchNumber (integer): The batch ID.

Response:

A list of counter values for that batch.

Example:

{
  "counters": {
    "zkCountersUsed": 14000,
    "gasUsed": 8000000
  }
}

zkevm_getBatchWitness

Description:

Returns the witness data used to generate a zk-proof for a batch.

Parameters:

• batchNumber (integer): The batch ID.

Response:

A large witness dataset used in zk-proof computation.

Example:

{
  "witnessData": "0xabcdef12345..."
}

zkevm_getExitRootTable

Description:

Returns the global exit root table.

Parameters:

None

Response:

A mapping of all exit roots across different rollups.

Example:

{
  "exitRoots": {
    "rollup1": "0x123abc...",
    "rollup2": "0x456def..."
  }
}

zkevm_isBlockConsolidated

Description:

Checks if an L2 block has been consolidated into a batch.

Parameters:

• blockNumber (integer): The L2 block ID.

Response:

• boolean (true/false): Whether the block is consolidated.

Example:

{
  "isConsolidated": true
}

zkevm_verifiedBatchNumber

Description:

Returns the last verified batch number on L1.

Parameters:

None

Response:

• batchNumber (integer): The latest verified batch.

Example:

{
  "batchNumber": 10432
}

Other zkEVM Methods

Method	Description
zkevm_getForkById	Fetches details of a specific fork by its ID.
zkevm_getForks	Lists all available forks in the zkEVM environment.
zkevm_getLatestDataStreamBlock	Retrieves the latest block in the data stream.
zkevm_getLatestGlobalExitRoot	Returns the latest exit root for rollup transactions.
zkevm_getRollupAddress	Fetches the rollup contract address.
zkevm_getRollupManagerAddress	Retrieves the address of the rollup manager contract.
zkevm_getVersionHistory	Returns a list of version upgrades and changes.

Notes on Usage

• State Verification: Some calls return trusted vs. verified results, meaning finality may depend on L1 settlement.
• Performance Considerations: Calls returning large datasets (e.g., getWitness) may take longer to execute.
• Gas Considerations: zkevm_estimateCounters helps optimize transaction gas usage in zkEVM environments.

For more details, refer to the Polygon zkEVM API Documentation: Polygon zkEVM Docs.