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🚧 Stagnant Standards Track: Interface

EIP-1474: Remote procedure call specification

Authors Paul Bouchon <[email protected]>, Erik Marks (@rekmarks)
Created 2018-10-02
Discussion Link https://ethereum-magicians.org/t/eip-remote-procedure-call-specification/1537

Table of Contents

Simple Summary

This proposal defines a standard set of remote procedure call methods that an Ethereum node should implement.

Abstract

Nodes created by the current generation of Ethereum clients expose inconsistent and incompatible remote procedure call (RPC) methods because no formal Ethereum RPC specification exists. This proposal standardizes such a specification to provide developers with a predictable Ethereum RPC interface regardless of underlying node implementation.

Specification

Concepts

RFC-2119

The key words “MUST”, “MUST NOT”, “REQUIRED”, “SHALL”, “SHALL NOT”, “SHOULD”, “SHOULD NOT”, “RECOMMENDED”, “MAY”, and “OPTIONAL” in this document are to be interpreted as described in RFC-2119.

JSON-RPC

Communication with Ethereum nodes is accomplished using JSON-RPC, a stateless, lightweight remote procedure call protocol that uses JSON as its data format. Ethereum RPC methods MUST be called using JSON-RPC request objects and MUST respond with JSON-RPC response objects.

Error codes

If an Ethereum RPC method encounters an error, the error member included on the response object MUST be an object containing a code member and descriptive message member. The following list contains all possible error codes and associated messages:

Code Message Meaning Category
-32700 Parse error Invalid JSON standard
-32600 Invalid request JSON is not a valid request object standard
-32601 Method not found Method does not exist standard
-32602 Invalid params Invalid method parameters standard
-32603 Internal error Internal JSON-RPC error standard
-32000 Invalid input Missing or invalid parameters non-standard
-32001 Resource not found Requested resource not found non-standard
-32002 Resource unavailable Requested resource not available non-standard
-32003 Transaction rejected Transaction creation failed non-standard
-32004 Method not supported Method is not implemented non-standard
-32005 Limit exceeded Request exceeds defined limit non-standard
-32006 JSON-RPC version not supported Version of JSON-RPC protocol is not supported non-standard

Example error response:

{
    "id": 1337
    "jsonrpc": "2.0",
    "error": {
        "code": -32003,
        "message": "Transaction rejected"
    }
}

Value encoding

Specific types of values passed to and returned from Ethereum RPC methods require special encoding:

Quantity
  • A Quantity value MUST be hex-encoded.
  • A Quantity value MUST be “0x”-prefixed.
  • A Quantity value MUST be expressed using the fewest possible hex digits per byte.
  • A Quantity value MUST express zero as “0x0”.

Examples Quantity values:

Value Valid Reason
0x invalid empty not a valid quantity
0x0 valid interpreted as a quantity of zero
0x00 invalid leading zeroes not allowed
0x41 valid interpreted as a quantity of 65
0x400 valid interpreted as a quantity of 1024
0x0400 invalid leading zeroes not allowed
ff invalid values must be prefixed
Block Identifier

The RPC methods below take a default block identifier as a parameter.

  • eth_getBalance
  • eth_getStorageAt
  • eth_getTransactionCount
  • eth_getCode
  • eth_call
  • eth_getProof

Since there is no way to clearly distinguish between a Data parameter and a Quantity parameter, EIP-1898 provides a format to specify a block either using the block hash or block number. The block identifier is a JSON object with the following fields:

Property Type Description
[blockNumber] {Quantity} The block in the canonical chain with this number
OR [blockHash] {Data} The block uniquely identified by this hash. The blockNumber and blockHash properties are mutually exclusive; exactly one of them must be set.
requireCanonical {boolean} (optional) Whether or not to throw an error if the block is not in the canonical chain as described below. Only allowed in conjunction with the blockHash tag. Defaults to false.

If the block is not found, the callee SHOULD raise a JSON-RPC error (the recommended error code is -32001: Resource not found. If the tag is blockHash and requireCanonical is true, the callee SHOULD additionally raise a JSON-RPC error if the block is not in the canonical chain (the recommended error code is -32000: Invalid input and in any case should be different than the error code for the block not found case so that the caller can distinguish the cases). The block-not-found check SHOULD take precedence over the block-is-canonical check, so that if the block is not found the callee raises block-not-found rather than block-not-canonical.

Data
  • A Data value MUST be hex-encoded.
  • A Data value MUST be “0x”-prefixed.
  • A Data value MUST be expressed using two hex digits per byte.

Examples Data values:

Value Valid Reason
0x valid interpreted as empty data
0x0 invalid each byte must be represented using two hex digits
0x00 valid interpreted as a single zero byte
0x41 true interpreted as a data value of 65
0x004200 true interpreted as a data value of 16896
0xf0f0f false bytes require two hex digits
004200 false values must be prefixed
Proposing changes

New Ethereum RPC methods and changes to existing methods MUST be proposed via the traditional EIP process. This allows for community consensus around new method implementations and proposed method modifications. RPC method proposals MUST reach “draft” status before being added to this proposal and the official Ethereum RPC specification defined herein.

Methods

web3_clientVersion

Description

Returns the version of the current client

Parameters

(none)

Returns

{string} - client version

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "web3_clientVersion",
    "params": [],
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "Mist/v0.9.3/darwin/go1.4.1"
}

web3_sha3

Description

Hashes data using the Keccak-256 algorithm

Parameters
# Type Description
1 {Data} data to hash
Returns

{Data} - Keccak-256 hash of the given data

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "web3_sha3",
    "params": ["0x68656c6c6f20776f726c64"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0xc94770007dda54cF92009BFF0dE90c06F603a09f"
}

net_listening

Description

Determines if this client is listening for new network connections

Parameters

(none)

Returns

{boolean} - true if listening is active or false if listening is not active

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "net_listening",
    "params": []
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": true
}

net_peerCount

Description

Returns the number of peers currently connected to this client

Parameters

(none)

Returns

{Quantity} - number of connected peers

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "net_peerCount",
    "params": []
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0x2"
}

net_version

Description

Returns the chain ID associated with the current network

Parameters

(none)

Returns

{string} - chain ID associated with the current network

Common chain IDs:

  • "1" - Ethereum mainnet
  • "3" - Ropsten testnet
  • "4" - Rinkeby testnet
  • "42" - Kovan testnet

Note: See EIP-155 for a complete list of possible chain IDs.

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "net_version",
    "params": []
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "3"
}

eth_accounts

Description

Returns a list of addresses owned by this client

Parameters

(none)

Returns

{Data[]} - array of addresses

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_accounts",
    "params": []
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": ["0xc94770007dda54cF92009BFF0dE90c06F603a09f"]
}

eth_blockNumber

Description

Returns the number of the most recent block seen by this client

Parameters

(none)

Returns

{Quantity} - number of the latest block

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_blockNumber",
    "params": []
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0xc94"
}

eth_call

Description

Executes a new message call immediately without submitting a transaction to the network

Parameters
# Type Description
1 {object} @property {Data} [from] - transaction sender
@property {Data} to - transaction recipient or null if deploying a contract
@property {Quantity} [gas] - gas provided for transaction execution
@property {Quantity} [gasPrice] - price in wei of each gas used
@property {Quantity} [value] - value in wei sent with this transaction
@property {Data} [data] - contract code or a hashed method call with encoded args
2 {Quantity|string|Block Identifier} block number, or one of "latest", "earliest" or "pending", or a block identifier as described in Block Identifier
Returns

{Data} - return value of executed contract

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_call",
    "params": [{
        "data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675",
        "from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
        "gas": "0x76c0",
        "gasPrice": "0x9184e72a000",
        "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
        "value": "0x9184e72a"
    }]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0x"
}

eth_coinbase

Description

Returns the coinbase address for this client

Parameters

(none)

Returns

{Data} - coinbase address

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_coinbase",
    "params": []
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0xc94770007dda54cF92009BFF0dE90c06F603a09f"
}

eth_estimateGas

Description

Estimates the gas necessary to complete a transaction without submitting it to the network

Note: The resulting gas estimation may be significantly more than the amount of gas actually used by the transaction. This is due to a variety of reasons including EVM mechanics and node performance.

Parameters
# Type Description
1 {object} @property {Data} [from] - transaction sender
@property {Data} [to] - transaction recipient
@property {Quantity} [gas] - gas provided for transaction execution
@property {Quantity} [gasPrice] - price in wei of each gas used
@property {Quantity} [value] - value in wei sent with this transaction
@property {Data} [data] - contract code or a hashed method call with encoded args
2 {Quantity|string} block number, or one of "latest", "earliest" or "pending"
Returns

{Quantity} - amount of gas required by transaction

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_estimateGas",
    "params": [{
        "data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675",
        "from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
        "gas": "0x76c0",
        "gasPrice": "0x9184e72a000",
        "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
        "value": "0x9184e72a"
    }]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0x5208"
}

eth_gasPrice

Description

Returns the current price of gas expressed in wei

Parameters

(none)

Returns

{Quantity} - current gas price in wei

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_gasPrice",
    "params": []
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0x09184e72a000"
}

eth_getBalance

Description

Returns the balance of an address in wei

Parameters
# Type Description
1 {Data} address to query for balance
2 {Quantity|string|Block Identifier} block number, or one of "latest", "earliest" or "pending", or a block identifier as described in Block Identifier
Returns

{Quantity} - balance of the provided account in wei

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getBalance",
    "params": ["0xc94770007dda54cF92009BFF0dE90c06F603a09f", "latest"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0x0234c8a3397aab58"
}

eth_getBlockByHash

Description

Returns information about a block specified by hash

Parameters
# Type Description
1 {Data} hash of a block
2 {boolean} true will pull full transaction objects, false will pull transaction hashes
Returns

{null|object} - null if no block is found, otherwise a block object with the following members:

  • {Data} extraData - “extra data” field of this block
  • {Data} hash - block hash or null if pending
  • {Data} logsBloom - logs bloom filter or null if pending
  • {Data} miner - address that received this block’s mining rewards
  • {Data} nonce - proof-of-work hash or null if pending
  • {Data} parentHash - parent block hash
  • {Data} receiptsRoot -root of the this block’s receipts trie
  • {Data} sha3Uncles - SHA3 of the uncles data in this block
  • {Data} stateRoot - root of this block’s final state trie
  • {Data} transactionsRoot - root of this block’s transaction trie
  • {Quantity} difficulty - difficulty for this block
  • {Quantity} gasLimit - maximum gas allowed in this block
  • {Quantity} gasUsed - total used gas by all transactions in this block
  • {Quantity} number - block number or null if pending
  • {Quantity} size - size of this block in bytes
  • {Quantity} timestamp - unix timestamp of when this block was collated
  • {Quantity} totalDifficulty - total difficulty of the chain until this block
  • {Array<Transaction>} transactions - list of transaction objects or hashes
  • {Array<Transaction>} uncles - list of uncle hashes
Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getBlockByHash",
    "params":["0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331", true]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": {
        "difficulty": "0x027f07",
        "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000",
        "gasLimit": "0x9f759",
        "gasUsed": "0x9f759",
        "hash": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331",
        "logsBloom": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331",
        "miner": "0x4e65fda2159562a496f9f3522f89122a3088497a",
        "nonce": "0xe04d296d2460cfb8472af2c5fd05b5a214109c25688d3704aed5484f9a7792f2",
        "number": "0x1b4",
        "parentHash": "0x9646252be9520f6e71339a8df9c55e4d7619deeb018d2a3f2d21fc165dde5eb5",
        "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
        "size":  "0x027f07",
        "stateRoot": "0xd5855eb08b3387c0af375e9cdb6acfc05eb8f519e419b874b6ff2ffda7ed1dff",
        "timestamp": "0x54e34e8e"
        "totalDifficulty":  "0x027f07",
        "transactions": []
        "transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
        "uncles": ["0x1606e5...", "0xd5145a9..."]
    }
}

eth_getBlockByNumber

Description

Returns information about a block specified by number

Parameters
# Type Description
1 {Quantity|string} block number, or one of "latest", "earliest" or "pending"
2 {boolean} true will pull full transaction objects, false will pull transaction hashes
Returns

{null|object} - null if no block is found, otherwise a block object with the following members:

  • {Data} extraData - “extra data” field of this block
  • {Data} hash - block hash or null if pending
  • {Data} logsBloom - logs bloom filter or null if pending
  • {Data} miner - address that received this block’s mining rewards
  • {Data} nonce - proof-of-work hash or null if pending
  • {Data} parentHash - parent block hash
  • {Data} receiptsRoot -root of the this block’s receipts trie
  • {Data} sha3Uncles - SHA3 of the uncles data in this block
  • {Data} stateRoot - root of this block’s final state trie
  • {Data} transactionsRoot - root of this block’s transaction trie
  • {Quantity} difficulty - difficulty for this block
  • {Quantity} gasLimit - maximum gas allowed in this block
  • {Quantity} gasUsed - total used gas by all transactions in this block
  • {Quantity} number - block number or null if pending
  • {Quantity} size - size of this block in bytes
  • {Quantity} timestamp - unix timestamp of when this block was collated
  • {Quantity} totalDifficulty - total difficulty of the chain until this block
  • {Array<Transaction>} transactions - list of transaction objects or hashes
  • {Array<Transaction>} uncles - list of uncle hashes
Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getBlockByNumber",
    "params":["0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331", true]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": {
        "difficulty": "0x027f07",
        "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000",
        "gasLimit": "0x9f759",
        "gasUsed": "0x9f759",
        "hash": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331",
        "logsBloom": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331",
        "miner": "0x4e65fda2159562a496f9f3522f89122a3088497a",
        "nonce": "0xe04d296d2460cfb8472af2c5fd05b5a214109c25688d3704aed5484f9a7792f2",
        "number": "0x1b4",
        "parentHash": "0x9646252be9520f6e71339a8df9c55e4d7619deeb018d2a3f2d21fc165dde5eb5",
        "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
        "size":  "0x027f07",
        "stateRoot": "0xd5855eb08b3387c0af375e9cdb6acfc05eb8f519e419b874b6ff2ffda7ed1dff",
        "timestamp": "0x54e34e8e"
        "totalDifficulty":  "0x027f07",
        "transactions": []
        "transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
        "uncles": ["0x1606e5...", "0xd5145a9..."]
    }
}

eth_getBlockTransactionCountByHash

Description

Returns the number of transactions in a block specified by block hash

Parameters
# Type Description
1 {Data} hash of a block
Returns

{Quantity} - number of transactions in the specified block

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getBlockTransactionCountByHash",
    "params": ["0xc94770007dda54cF92009BFF0dE90c06F603a09f"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0xc"
}

eth_getBlockTransactionCountByNumber

Description

Returns the number of transactions in a block specified by block number

Parameters
# Type Description
1 {Quantity|string} block number, or one of "latest", "earliest" or "pending"
Returns

{Quantity} - number of transactions in the specified block

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getBlockTransactionCountByNumber",
    "params": ["0xe8"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0xa"
}

eth_getCode

Description

Returns the contract code stored at a given address

Parameters
# Type Description
1 {Data} address to query for code
2 {Quantity|string|Block Identifier} block number, or one of "latest", "earliest" or "pending", or a block identifier as described in Block Identifier
Returns

{Data} - code from the specified address

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getCode",
    "params": ["0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b", "0x2"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0x600160008035811a818181146012578301005b601b6001356025565b8060005260206000f25b600060078202905091905056"
}

eth_getFilterChanges

Description

Returns a list of all logs based on filter ID since the last log retrieval

Parameters
# Type Description
1 {Quantity} ID of the filter
Returns

{Array<Log>} - array of log objects with the following members:

  • {Data} address - address from which this log originated
  • {Data} blockHash - hash of block containing this log or null if pending
  • {Data} data - contains the non-indexed arguments of the log
  • {Data} transactionHash - hash of the transaction that created this log or null if pending
  • {Quantity} blockNumber - number of block containing this log or null if pending
  • {Quantity} logIndex - index of this log within its block or null if pending
  • {Quantity} transactionIndex - index of the transaction that created this log or null if pending
  • {Data[]} topics - list of order-dependent topics
  • {boolean} removed - true if this filter has been destroyed and is invalid

Note: The return value of eth_getFilterChanges when retrieving logs from eth_newBlockFilter and eth_newPendingTransactionFilter filters will be an array of hashes, not an array of Log objects.

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getFilterChanges",
    "params": ["0x16"]
}' <url>

# Response
{
   "id": 1337,
   "jsonrpc": "2.0",
    "result": [{
        "address": "0x16c5785ac562ff41e2dcfdf829c5a142f1fccd7d",
        "blockHash": "0x8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcfdf829c5a142f1fccd7d",
        "blockNumber":"0x1b4",
        "data":"0x0000000000000000000000000000000000000000000000000000000000000000",
        "logIndex": "0x1",
        "topics": [],
        "transactionHash":  "0xdf829c5a142f1fccd7d8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcf",
        "transactionIndex": "0x0"
   }]
}

eth_getFilterLogs

Description

Returns a list of all logs based on filter ID

Parameters
# Type Description
1 {Quantity} ID of the filter
Returns

{Array<Log>} - array of log objects with the following members:

  • {Data} address - address from which this log originated
  • {Data} blockHash - hash of block containing this log or null if pending
  • {Data} data - contains the non-indexed arguments of the log
  • {Data} transactionHash - hash of the transaction that created this log or null if pending
  • {Quantity} blockNumber - number of block containing this log or null if pending
  • {Quantity} logIndex - index of this log within its block or null if pending
  • {Quantity} transactionIndex - index of the transaction that created this log or null if pending
  • {Array<Data>} topics - list of order-dependent topics
  • {boolean} removed - true if this filter has been destroyed and is invalid

Note: The return value of eth_getFilterLogs when retrieving logs from eth_newBlockFilter and eth_newPendingTransactionFilter filters will be an array of hashes, not an array of Log objects.

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getFilterLogs",
    "params": ["0x16"]
}' <url>

# Response
{
   "id": 1337,
   "jsonrpc": "2.0",
    "result": [{
        "address": "0x16c5785ac562ff41e2dcfdf829c5a142f1fccd7d",
        "blockHash": "0x8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcfdf829c5a142f1fccd7d",
        "blockNumber":"0x1b4",
        "data":"0x0000000000000000000000000000000000000000000000000000000000000000",
        "logIndex": "0x1",
        "topics": [],
        "transactionHash":  "0xdf829c5a142f1fccd7d8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcf",
        "transactionIndex": "0x0"
   }]
}

eth_getLogs

Description

Returns a list of all logs based on a filter object

Parameters
# Type Description
1 {object} @property {Quantity|string} [fromBlock] - block number, or one of "latest", "earliest" or "pending"
@property {Quantity|string} [toBlock] - block number, or one of "latest", "earliest" or "pending"
@property {Data|Data[]} [address] - contract address or a list of addresses from which logs should originate
@property {Data[]} [topics] - list of order-dependent topics
@property {Data} [blockhash] - restrict logs to a block by hash

Note: If blockhash is passed, neither fromBlock nor toBlock are allowed or respected.

Returns

{Array<Log>} - array of log objects with the following members:

  • {Data} address - address from which this log originated
  • {Data} blockHash - hash of block containing this log or null if pending
  • {Data} data - contains the non-indexed arguments of the log
  • {Data} transactionHash - hash of the transaction that created this log or null if pending
  • {Quantity} blockNumber - number of block containing this log or null if pending
  • {Quantity} logIndex - index of this log within its block or null if pending
  • {Quantity} transactionIndex - index of the transaction that created this log or null if pending
  • {Data} topics - list of order-dependent topics
  • {boolean} removed - true if this filter has been destroyed and is invalid
Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getLogs",
    "params": [{
        "topics":["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b"]
    }]
}' <url>

# Response
{
   "id": 1337,
   "jsonrpc": "2.0",
    "result": [{
        "address": "0x16c5785ac562ff41e2dcfdf829c5a142f1fccd7d",
        "blockHash": "0x8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcfdf829c5a142f1fccd7d",
        "blockNumber":"0x1b4",
        "data":"0x0000000000000000000000000000000000000000000000000000000000000000",
        "logIndex": "0x1",
        "topics": [],
        "transactionHash":  "0xdf829c5a142f1fccd7d8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcf",
        "transactionIndex": "0x0"
   }]
}

eth_getStorageAt

Description

Returns the value from a storage position at an address

Parameters
# Type Description
1 {Data} address of stored data
2 {Quantity} index into stored data
3 {Quantity|string|Block Identifier} block number, or one of "latest", "earliest" or "pending", or a block identifier as described in Block Identifier
Returns

{Data} - value stored at the given address and data index

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getStorageAt",
    "params": ["0x295a70b2de5e3953354a6a8344e616ed314d7251", "0x0", "latest"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0x00000000000000000000000000000000000000000000000000000000000004d2"
}

eth_getTransactionByBlockHashAndIndex

Description

Returns information about a transaction specified by block hash and transaction index

Parameters
# Type Description
1 {Data} hash of a block
2 {Quantity} index of a transaction in the specified block
Returns

{null|object} - null if no transaction is found, otherwise a transaction object with the following members:

  • {Data} r - ECDSA signature r
  • {Data} s - ECDSA signature s
  • {Data} blockHash - hash of block containing this transaction or null if pending
  • {Data} from - transaction sender
  • {Data} hash - hash of this transaction
  • {Data} input - contract code or a hashed method call
  • {Data} to - transaction recipient or null if deploying a contract
  • {Quantity} v - ECDSA recovery ID
  • {Quantity} blockNumber - number of block containing this transaction or null if pending
  • {Quantity} gas - gas provided for transaction execution
  • {Quantity} gasPrice - price in wei of each gas used
  • {Quantity} nonce - unique number identifying this transaction
  • {Quantity} transactionIndex - index of this transaction in the block or null if pending
  • {Quantity} value - value in wei sent with this transaction
Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getTransactionByBlockHashAndIndex",
    "params":["0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331", "0x0"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": {
        "blockHash": "0x1d59ff54b1eb26b013ce3cb5fc9dab3705b415a67127a003c3e61eb445bb8df2",
        "blockNumber": "0x5daf3b",
        "from": "0xa7d9ddbe1f17865597fbd27ec712455208b6b76d",
        "gas": "0xc350",
        "gasPrice": "0x4a817c800",
        "hash": "0x88df016429689c079f3b2f6ad39fa052532c56795b733da78a91ebe6a713944b",
        "input": "0x68656c6c6f21",
        "nonce": "0x15",
        "r": "0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea",
        "s": "0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c",
        "to": "0xf02c1c8e6114b1dbe8937a39260b5b0a374432bb",
        "transactionIndex": "0x41",
        "v": "0x25",
        "value": "0xf3dbb76162000"
    }
}

eth_getTransactionByBlockNumberAndIndex

Description

Returns information about a transaction specified by block number and transaction index

Parameters
# Type Description
1 {Quantity|string} block number, or one of "latest", "earliest" or "pending"
2 {Quantity} index of a transaction in the specified block
Returns

{null|object} - null if no transaction is found, otherwise a transaction object with the following members:

  • {Data} r - ECDSA signature r
  • {Data} s - ECDSA signature s
  • {Data} blockHash - hash of block containing this transaction or null if pending
  • {Data} from - transaction sender
  • {Data} hash - hash of this transaction
  • {Data} input - contract code or a hashed method call
  • {Data} to - transaction recipient or null if deploying a contract
  • {Quantity} v - ECDSA recovery ID
  • {Quantity} blockNumber - number of block containing this transaction or null if pending
  • {Quantity} gas - gas provided for transaction execution
  • {Quantity} gasPrice - price in wei of each gas used
  • {Quantity} nonce - unique number identifying this transaction
  • {Quantity} transactionIndex - index of this transaction in the block or null if pending
  • {Quantity} value - value in wei sent with this transaction
Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getTransactionByBlockNumberAndIndex",
    "params":["0x29c", "0x0"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": {
        "blockHash": "0x1d59ff54b1eb26b013ce3cb5fc9dab3705b415a67127a003c3e61eb445bb8df2",
        "blockNumber": "0x5daf3b",
        "from": "0xa7d9ddbe1f17865597fbd27ec712455208b6b76d",
        "gas": "0xc350",
        "gasPrice": "0x4a817c800",
        "hash": "0x88df016429689c079f3b2f6ad39fa052532c56795b733da78a91ebe6a713944b",
        "input": "0x68656c6c6f21",
        "nonce": "0x15",
        "r": "0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea",
        "s": "0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c",
        "to": "0xf02c1c8e6114b1dbe8937a39260b5b0a374432bb",
        "transactionIndex": "0x41",
        "v": "0x25",
        "value": "0xf3dbb76162000"
    }
}

eth_getTransactionByHash

Description

Returns information about a transaction specified by hash

Parameters
# Type Description
1 {Data} hash of a transaction
Returns

{null|object} - null if no transaction is found, otherwise a transaction object with the following members:

  • {Data} r - ECDSA signature r
  • {Data} s - ECDSA signature s
  • {Data} blockHash - hash of block containing this transaction or null if pending
  • {Data} from - transaction sender
  • {Data} hash - hash of this transaction
  • {Data} input - contract code or a hashed method call
  • {Data} to - transaction recipient or null if deploying a contract
  • {Quantity} v - ECDSA recovery ID
  • {Quantity} blockNumber - number of block containing this transaction or null if pending
  • {Quantity} gas - gas provided for transaction execution
  • {Quantity} gasPrice - price in wei of each gas used
  • {Quantity} nonce - unique number identifying this transaction
  • {Quantity} transactionIndex - index of this transaction in the block or null if pending
  • {Quantity} value - value in wei sent with this transaction
Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getTransactionByHash",
    "params": ["0x88df016429689c079f3b2f6ad39fa052532c56795b733da78a91ebe6a713944b"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": {
        "blockHash": "0x1d59ff54b1eb26b013ce3cb5fc9dab3705b415a67127a003c3e61eb445bb8df2",
        "blockNumber": "0x5daf3b",
        "from": "0xa7d9ddbe1f17865597fbd27ec712455208b6b76d",
        "gas": "0xc350",
        "gasPrice": "0x4a817c800",
        "hash": "0x88df016429689c079f3b2f6ad39fa052532c56795b733da78a91ebe6a713944b",
        "input": "0x68656c6c6f21",
        "nonce": "0x15",
        "r": "0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea",
        "s": "0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c",
        "to": "0xf02c1c8e6114b1dbe8937a39260b5b0a374432bb",
        "transactionIndex": "0x41",
        "v": "0x25",
        "value": "0xf3dbb76162000"
    }
}

eth_getTransactionCount

Description

Returns the number of transactions sent from an address

Parameters
# Type Description
1 {Data} address to query for sent transactions
2 {Quantity|string|Block Identifier} block number, or one of "latest", "earliest" or "pending", or a block identifier as described in Block Identifier
Returns

{Quantity} - number of transactions sent from the specified address

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getTransactionCount",
    "params": ["0xc94770007dda54cF92009BFF0dE90c06F603a09f", "latest"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0x1"
}

eth_getTransactionReceipt

Description

Returns the receipt of a transaction specified by hash

Note: Transaction receipts are unavailable for pending transactions.

Parameters
# Type Description
1 {Data} hash of a transaction
Returns

{null|object} - null if no transaction is found, otherwise a transaction receipt object with the following members:

  • {Data} blockHash - hash of block containing this transaction
  • {Data} contractAddress - address of new contract or null if no contract was created
  • {Data} from - transaction sender
  • {Data} logsBloom - logs bloom filter
  • {Data} to - transaction recipient or null if deploying a contract
  • {Data} transactionHash - hash of this transaction
  • {Quantity} blockNumber - number of block containing this transaction
  • {Quantity} cumulativeGasUsed - gas used by this and all preceding transactions in this block
  • {Quantity} gasUsed - gas used by this transaction
  • {Quantity} status - 1 if this transaction was successful or 0 if it failed
  • {Quantity} transactionIndex - index of this transaction in the block
  • {Array<Log>} logs - list of log objects generated by this transaction
Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getTransactionReceipt",
    "params": ["0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": {
        "blockHash": '0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b',
        "blockNumber": '0xb',
        "contractAddress": '0xb60e8dd61c5d32be8058bb8eb970870f07233155',
        "cumulativeGasUsed": '0x33bc',
        "gasUsed": '0x4dc',
        "logs": [],
        "logsBloom": "0x00...0",
        "status": "0x1",
        "transactionHash": '0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238',
        "transactionIndex":  '0x1'
    }
}

eth_getUncleByBlockHashAndIndex

Description

Returns information about an uncle specified by block hash and uncle index position

Parameters
# Type Description
1 {Data} hash of a block
2 {Quantity} index of uncle
Returns

{null|object} - null if no block or uncle is found, otherwise an uncle object with the following members:

  • {Data} extraData - “extra data” field of this block
  • {Data} hash - block hash or null if pending
  • {Data} logsBloom - logs bloom filter or null if pending
  • {Data} miner - address that received this block’s mining rewards
  • {Data} nonce - proof-of-work hash or null if pending
  • {Data} parentHash - parent block hash
  • {Data} receiptsRoot -root of the this block’s receipts trie
  • {Data} sha3Uncles - SHA3 of the uncles data in this block
  • {Data} stateRoot - root of this block’s final state trie
  • {Data} transactionsRoot - root of this block’s transaction trie
  • {Quantity} difficulty - difficulty for this block
  • {Quantity} gasLimit - maximum gas allowed in this block
  • {Quantity} gasUsed - total used gas by all transactions in this block
  • {Quantity} number - block number or null if pending
  • {Quantity} size - size of this block in bytes
  • {Quantity} timestamp - unix timestamp of when this block was collated
  • {Quantity} totalDifficulty - total difficulty of the chain until this block
  • {Array<Transaction>} uncles - list of uncle hashes
Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getUncleByBlockHashAndIndex",
    "params": ["0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b", "0x0"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": {
        "difficulty": "0x027f07",
        "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000",
        "gasLimit": "0x9f759",
        "gasUsed": "0x9f759",
        "hash": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331",
        "logsBloom": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331",
        "miner": "0x4e65fda2159562a496f9f3522f89122a3088497a",
        "nonce": "0xe04d296d2460cfb8472af2c5fd05b5a214109c25688d3704aed5484f9a7792f2",
        "number": "0x1b4",
        "parentHash": "0x9646252be9520f6e71339a8df9c55e4d7619deeb018d2a3f2d21fc165dde5eb5",
        "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
        "size":  "0x027f07",
        "stateRoot": "0xd5855eb08b3387c0af375e9cdb6acfc05eb8f519e419b874b6ff2ffda7ed1dff",
        "timestamp": "0x54e34e8e"
        "totalDifficulty":  "0x027f07",
        "transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
        "uncles": []
    }
}

eth_getUncleByBlockNumberAndIndex

Description

Returns information about an uncle specified by block number and uncle index position

Parameters
# Type Description
1 {Quantity|string} block number, or one of "latest", "earliest" or "pending"
2 {Quantity} index of uncle
Returns

{null|object} - null if no block or uncle is found, otherwise an uncle object with the following members:

  • {Data} extraData - “extra data” field of this block
  • {Data} hash - block hash or null if pending
  • {Data} logsBloom - logs bloom filter or null if pending
  • {Data} miner - address that received this block’s mining rewards
  • {Data} nonce - proof-of-work hash or null if pending
  • {Data} parentHash - parent block hash
  • {Data} receiptsRoot -root of the this block’s receipts trie
  • {Data} sha3Uncles - SHA3 of the uncles data in this block
  • {Data} stateRoot - root of this block’s final state trie
  • {Data} transactionsRoot - root of this block’s transaction trie
  • {Quantity} difficulty - difficulty for this block
  • {Quantity} gasLimit - maximum gas allowed in this block
  • {Quantity} gasUsed - total used gas by all transactions in this block
  • {Quantity} number - block number or null if pending
  • {Quantity} size - size of this block in bytes
  • {Quantity} timestamp - unix timestamp of when this block was collated
  • {Quantity} totalDifficulty - total difficulty of the chain until this block
  • {Array<Transaction>} uncles - list of uncle hashes
Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getUncleByBlockNumberAndIndex",
    "params": ["0x29c", "0x0"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": {
        "difficulty": "0x027f07",
        "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000",
        "gasLimit": "0x9f759",
        "gasUsed": "0x9f759",
        "hash": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331",
        "logsBloom": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331",
        "miner": "0x4e65fda2159562a496f9f3522f89122a3088497a",
        "nonce": "0xe04d296d2460cfb8472af2c5fd05b5a214109c25688d3704aed5484f9a7792f2",
        "number": "0x1b4",
        "parentHash": "0x9646252be9520f6e71339a8df9c55e4d7619deeb018d2a3f2d21fc165dde5eb5",
        "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
        "size":  "0x027f07",
        "stateRoot": "0xd5855eb08b3387c0af375e9cdb6acfc05eb8f519e419b874b6ff2ffda7ed1dff",
        "timestamp": "0x54e34e8e"
        "totalDifficulty":  "0x027f07",
        "transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
        "uncles": []
    }
}

eth_getUncleCountByBlockHash

Description

Returns the number of uncles in a block specified by block hash

Parameters
# Type Description
1 {Data} hash of a block
Returns

{Quantity} - number of uncles in the specified block

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getUncleCountByBlockHash",
    "params": ["0xc94770007dda54cF92009BFF0dE90c06F603a09f"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0xc"
}

eth_getUncleCountByBlockNumber

Description

Returns the number of uncles in a block specified by block number

Parameters
# Type Description
1 {Quantity|string} block number, or one of "latest", "earliest" or "pending"
Returns

{Quantity} - number of uncles in the specified block

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getUncleCountByBlockNumber",
    "params": ["0xe8"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0x1"
}

eth_getWork

Description

Returns a list containing relevant information for proof-of-work

Parameters

none

Returns

{Data[]} - array with the following items:

  1. {Data} - current block header pow-hash
  2. {Data} - seed hash used for the DAG
  3. {Data} - boundary condition (“target”), 2^256 / difficulty
Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_getWork",
    "params": []
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": [
        "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
        "0x5EED00000000000000000000000000005EED0000000000000000000000000000",
        "0xd1ff1c01710000000000000000000000d1ff1c01710000000000000000000000"
    ]
}

eth_hashrate

Description

Returns the number of hashes-per-second this node is mining at

Parameters

(none)

Returns

{Quantity} - number of hashes-per-second

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_hashrate",
    "params": []
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0x38a"
}

eth_mining

Description

Determines if this client is mining new blocks

Parameters

(none)

Returns

{boolean} - true if this client is mining or false if it is not mining

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_mining",
    "params": []
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": true
}

eth_newBlockFilter

Description

Creates a filter to listen for new blocks that can be used with eth_getFilterChanges

Parameters

none

Returns

{Quantity} - ID of the newly-created filter that can be used with eth_getFilterChanges

Example 
# Request
curl -X POST --data '{
    "id": 1337
    "jsonrpc": "2.0",
    "method": "eth_newBlockFilter",
    "params": []
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0x1"
}

eth_newFilter

Description

Creates a filter to listen for specific state changes that can then be used with eth_getFilterChanges

Parameters
# Type Description
1 {object} @property {Quantity|string} [fromBlock] - block number, or one of "latest", "earliest" or "pending"
@property {Quantity|string} [toBlock] - block number, or one of "latest", "earliest" or "pending"
@property {Data|Data[]} [address] - contract address or a list of addresses from which logs should originate
@property {Data[]} [topics] - list of order-dependent topics

Note: Topics are order-dependent. A transaction with a log with topics [A, B] will be matched by the following topic filters:

  • [] - “anything”
  • [A] - “A in first position (and anything after)”
  • [null, B] - “anything in first position AND B in second position (and anything after)”
  • [A, B] - “A in first position AND B in second position (and anything after)”
  • [[A, B], [A, B]] - “(A OR B) in first position AND (A OR B) in second position (and anything after)”
Returns

{Quantity} - ID of the newly-created filter that can be used with eth_getFilterChanges

Example 
# Request
curl -X POST --data '{
    "id": 1337
    "jsonrpc": "2.0",
    "method": "eth_newFilter",
    "params": [{
        "topics": ["0x0000000000000000000000000000000000000000000000000000000012341234"]
    }]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0x1"
}

eth_newPendingTransactionFilter

Description

Creates a filter to listen for new pending transactions that can be used with eth_getFilterChanges

Parameters

none

Returns

{Quantity} - ID of the newly-created filter that can be used with eth_getFilterChanges

Example 
# Request
curl -X POST --data '{
    "id": 1337
    "jsonrpc": "2.0",
    "method": "eth_newPendingTransactionFilter",
    "params": []
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0x1"
}

eth_protocolVersion

Description

Returns the current Ethereum protocol version

Parameters

(none)

Returns

{string} - current Ethereum protocol version

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_protocolVersion",
    "params": []
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "54"
}

eth_sendRawTransaction

Description

Sends and already-signed transaction to the network

Parameters
# Type Description
1 {Data} signed transaction data
Returns

{Data} - transaction hash, or the zero hash if the transaction is not yet available

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_sendRawTransaction",
    "params": ["0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331"
}

eth_sendTransaction

Description

Creates, signs, and sends a new transaction to the network

Parameters
# Type Description
1 {object} @property {Data} from - transaction sender
@property {Data} [to] - transaction recipient
@property {Quantity} [gas="0x15f90"] - gas provided for transaction execution
@property {Quantity} [gasPrice] - price in wei of each gas used
@property {Quantity} [value] - value in wei sent with this transaction
@property {Data} [data] - contract code or a hashed method call with encoded args
@property {Quantity} [nonce] - unique number identifying this transaction
Returns

{Data} - transaction hash, or the zero hash if the transaction is not yet available

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_sendTransaction",
    "params": [{
        "data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675",
        "from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
        "gas": "0x76c0",
        "gasPrice": "0x9184e72a000",
        "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
        "value": "0x9184e72a"
    }]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331"
}

eth_sign

Description

Calculates an Ethereum-specific signature in the form of keccak256("\x19Ethereum Signed Message:\n" + len(message) + message))

Parameters
# Type Description
1 {Data} address to use for signing
2 {Data} data to sign
Returns

{Data} - signature hash of the provided data

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_sign",
    "params": ["0x9b2055d370f73ec7d8a03e965129118dc8f5bf83", "0xdeadbeaf"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0xa3f20717a250c2b0b729b7e5becbff67fdaef7e0699da4de7ca5895b02a170a12d887fd3b17bfdce3481f10bea41f45ba9f709d39ce8325427b57afcfc994cee1b"
}

eth_signTransaction

Description

Signs a transaction that can be submitted to the network at a later time using with eth_sendRawTransaction

Parameters
# Type Description
1 {object} @property {Data} from - transaction sender
@property {Data} [to] - transaction recipient
@property {Quantity} [gas="0x15f90"] - gas provided for transaction execution
@property {Quantity} [gasPrice] - price in wei of each gas used
@property {Quantity} [value] - value in wei sent with this transaction
@property {Data} [data] - contract code or a hashed method call with encoded args
@property {Quantity} [nonce] - unique number identifying this transaction
Returns

{Data} - signature hash of the transaction object

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_signTransaction",
    "params": [{
        "data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675",
        "from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
        "gas": "0x76c0",
        "gasPrice": "0x9184e72a000",
        "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
        "value": "0x9184e72a"
    }]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0xa3f20717a250c2b0b729b7e5becbff67fdaef7e0699da4de7ca5895b02a170a12d887fd3b17bfdce3481f10bea41f45ba9f709d39ce8325427b57afcfc994cee1b"
}

eth_signTypedData

Description

Calculates an Ethereum-specific signature in the form of keccak256("\x19Ethereum Signed Message:\n" + len(message) + message))

Parameters
# Type Description
1 {Data} address to use for signing
2 {Data} message to sign containing type information, a domain separator, and data

Note: Client developers should refer to EIP-712 for complete semantics around encoding and signing data. Dapp developers should refer to EIP-712 for the expected structure of RPC method input parameters.

Returns

{Data} - signature hash of the provided message

Example 
# Request
curl -X POST --data '{
	"id": 1337
	"jsonrpc": "2.0",
	"method": "eth_signTypedData",
	"params": ["0xCD2a3d9F938E13CD947Ec05AbC7FE734Df8DD826", {
		"types": {
			"EIP712Domain": [{
				"name": "name",
				"type": "string"
			}, {
				"name": "version",
				"type": "string"
			}, {
				"name": "chainId",
				"type": "uint256"
			}, {
				"name": "verifyingContract",
				"type": "address"
			}],
			"Person": [{
				"name": "name",
				"type": "string"
			}, {
				"name": "wallet",
				"type": "address"
			}],
			"Mail": [{
				"name": "from",
				"type": "Person"
			}, {
				"name": "to",
				"type": "Person"
			}, {
				"name": "contents",
				"type": "string"
			}]
		},
		"primaryType": "Mail",
		"domain": {
			"name": "Ether Mail",
			"version": "1",
			"chainId": 1,
			"verifyingContract": "0xCcCCccccCCCCcCCCCCCcCcCccCcCCCcCcccccccC"
		},
		"message": {
			"from": {
				"name": "Cow",
				"wallet": "0xCD2a3d9F938E13CD947Ec05AbC7FE734Df8DD826"
			},
			"to": {
				"name": "Bob",
				"wallet": "0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB"
			},
			"contents": "Hello, Bob!"
		}
	}]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": "0x4355c47d63924e8a72e509b65029052eb6c299d53a04e167c5775fd466751c9d07299936d304c153f6443dfa05f40ff007d72911b6f72307f996231605b915621c"
}

eth_submitHashrate

Description

Submit a mining hashrate

Parameters
# Type Description
1 {Data} hash rate
2 {Data} random ID identifying this node
Returns

{boolean} - true if submitting went through successfully, false otherwise

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_submitHashrate",
    "params": [
        "0x0000000000000000000000000000000000000000000000000000000000500000",
        "0x59daa26581d0acd1fce254fb7e85952f4c09d0915afd33d3886cd914bc7d283c"
    ]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": true
}

eth_submitWork

Description

Submit a proof-of-work solution

Parameters
# Type Description
1 {Data} nonce found
2 {Data} header’s pow-hash
3 {Data} mix digest
Returns

{boolean} - true if the provided solution is valid, false otherwise

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_submitWork",
    "params": [
        "0x0000000000000001",
        "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
        "0xD1GE5700000000000000000000000000D1GE5700000000000000000000000000"
    ]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": true
}

eth_syncing

Description

Returns information about the status of this client’s network synchronization

Parameters

(none)

Returns

{boolean|object} - false if this client is not syncing with the network, otherwise an object with the following members:

  • {Quantity} currentBlock - number of the most-recent block synced
  • {Quantity} highestBlock - number of latest block on the network
  • {Quantity} startingBlock - block number at which syncing started
Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_syncing",
    "params": []
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": {
        "currentBlock": '0x386',
        "highestBlock": '0x454',
        "startingBlock": '0x384'
    }
}

eth_uninstallFilter

Description

Destroys a filter based on filter ID

Note: This should only be called if a filter and its notifications are no longer needed. This will also be called automatically on a filter if its notifications are not retrieved using eth_getFilterChanges for a period of time.

Parameters
# Type Description
1 {Quantity} ID of the filter to destroy
Returns

{boolean} - true if the filter is found and successfully destroyed or false if it is not

Example 
# Request
curl -X POST --data '{
    "id": 1337,
    "jsonrpc": "2.0",
    "method": "eth_uninstallFilter",
    "params": ["0xb"]
}' <url>

# Response
{
    "id": 1337,
    "jsonrpc": "2.0",
    "result": true
}

Rationale

Much of Ethereum’s effectiveness as an enterprise-grade application platform depends on its ability to provide a reliable and predictable developer experience. Nodes created by the current generation of Ethereum clients expose RPC endpoints with differing method signatures; this forces applications to work around method inconsistencies to maintain compatibility with various Ethereum RPC implementations.

Both Ethereum client developers and downstream dapp developers lack a formal Ethereum RPC specification. This proposal standardizes such a specification in a way that’s versionable and modifiable through the traditional EIP process.

Backwards compatibility

This proposal impacts Ethereum client developers by requiring that any exposed RPC interface adheres to this specification. This proposal impacts dapp developers by requiring that any RPC calls currently used in applications are made according to this specification.

Implementation

The current generation of Ethereum clients includes several implementations that attempt to expose this RPC specification:

Client Name Language Homepage
Geth Go geth.ethereum.org
Parity Rust parity.io/ethereum
Aleth C++ cpp-ethereum.org

Copyright and related rights waived via CC0.

Citation

Please cite this document as:

Paul Bouchon <[email protected]>, Erik Marks (@rekmarks), "EIP-1474: Remote procedure call specification [DRAFT]," Ethereum Improvement Proposals, no. 1474, October 2018. [Online serial]. Available: https://eips.ethereum.org/EIPS/eip-1474.