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JSONRPC eth module

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Gav Wood edited this page Aug 10, 2016 · 3 revisions

The eth Module

The default block parameter

The following methods have an optional extra defaultBlock parameter:

When requests are made that act on the state of Ethereum, the last parameter determines the height of the block.

The following options are possible for the defaultBlock parameter:

  • QUANTITY/INT - an integer block number;
  • STR "earliest" for the earliest/genesis block;
  • STR "latest" - for the latest mined block;
  • STR "pending" - for the pending state/transactions.

JSON-RPC methods

JSON RPC API Reference

eth_protocolVersion

Returns the current ethereum protocol version.

Parameters

none

Returns

String - The current ethereum protocol version

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_protocolVersion","params":[],"id":67}' localhost:8545

// Result
{
  "id":67,
  "jsonrpc": "2.0",
  "result": "54"
}

eth_syncing

Returns an object with data about the sync status or false.

Parameters

none

Returns

Object|Boolean, An object with sync status data or FALSE, when not syncing:

  • startingBlock: QUANTITY - The block at which the import started (will only be reset, after the sync reached his head)
  • currentBlock: QUANTITY - The current block, same as eth_blockNumber
  • highestBlock: QUANTITY - The estimated highest block
Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_syncing","params":[],"id":1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": {
    startingBlock: '0x384',
    currentBlock: '0x386',
    highestBlock: '0x454'
  }
}
// Or when not syncing
{
  "id":1,
  "jsonrpc": "2.0",
  "result": false
}

eth_coinbase

Returns the client coinbase address.

Parameters

none

Returns

DATA, 20 bytes - the current coinbase address.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_coinbase","params":[],"id":64}' localhost:8545

// Result
{
  "id":64,
  "jsonrpc": "2.0",
  "result": "0x407d73d8a49eeb85d32cf465507dd71d507100c1"
}

eth_mining

Returns true if client is actively mining new blocks.

Parameters

none

Returns

Boolean - returns true of the client is mining, otherwise false.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_mining","params":[],"id":71}' localhost:8545

// Result
{
  "id":71,
  "jsonrpc": "2.0",
  "result": true
}

eth_hashrate

Returns the number of hashes per second that the node is mining with.

Parameters

none

Returns

QUANTITY - number of hashes per second.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_hashrate","params":[],"id":71}' localhost:8545

// Result
{
  "id":71,
  "jsonrpc": "2.0",
  "result": "0x38a"
}

eth_gasPrice

Returns the current price per gas in wei.

Parameters

none

Returns

QUANTITY - integer of the current gas price in wei.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_gasPrice","params":[],"id":73}' localhost:8545

// Result
{
  "id":73,
  "jsonrpc": "2.0",
  "result": "0x09184e72a000" // 10000000000000
}

eth_accounts

Returns a list of addresses owned by client.

Parameters

none

Returns

Array of DATA, 20 Bytes - addresses owned by the client.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_accounts","params":[],"id":1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": ["0x407d73d8a49eeb85d32cf465507dd71d507100c1"]
}

eth_blockNumber

Returns the number of most recent block.

Parameters

none

Returns

QUANTITY - integer of the current block number the client is on.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":83}' localhost:8545

// Result
{
  "id":83,
  "jsonrpc": "2.0",
  "result": "0x4b7" // 1207
}

eth_getBalance

Returns the balance of the account of given address.

Parameters
  1. DATA, 20 Bytes - address to check for balance.
  2. QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the default block parameter 
params: [
   '0x407d73d8a49eeb85d32cf465507dd71d507100c1',
   'latest'
]
Returns

QUANTITY - integer of the current balance in wei.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getBalance","params":["0x407d73d8a49eeb85d32cf465507dd71d507100c1", "latest"],"id":1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x0234c8a3397aab58" // 158972490234375000
}

eth_getStorageAt

Returns the value from a storage position at a given address.

Parameters
  1. DATA, 20 Bytes - address of the storage.
  2. QUANTITY - integer of the position in the storage.
  3. QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the default block parameter 
params: [
   '0x407d73d8a49eeb85d32cf465507dd71d507100c1',
   '0x0', // storage position at 0
   '0x2' // state at block number 2
]
Returns

DATA, 32 Bytes - the value at this storage position.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getStorageAt","params":["0x407d73d8a49eeb85d32cf465507dd71d507100c1", "0x0", "0x2"],"id":1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x0000000000000000000000000000000000000000000000000000000000000003"
}

eth_getTransactionCount

Returns the number of transactions sent from an address.

Parameters
  1. DATA, 20 Bytes - address.
  2. QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the default block parameter 
params: [
   '0x407d73d8a49eeb85d32cf465507dd71d507100c1',
   'latest' // state at the latest block
]
Returns

QUANTITY - integer of the number of transactions send from this address.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getTransactionCount","params":["0x407d73d8a49eeb85d32cf465507dd71d507100c1","latest"],"id":1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x1" // 1
}

eth_getBlockTransactionCountByHash

Returns the number of transactions in a block from a block matching the given block hash.

Parameters
  1. DATA, 32 Bytes - hash of a block
params: [
   '0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238'
]
Returns

QUANTITY - integer of the number of transactions in this block.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getBlockTransactionCountByHash","params":["0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238"],"id":1}'

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0xb" // 11
}

eth_getBlockTransactionCountByNumber

Returns the number of transactions in a block from a block matching the given block number.

Parameters
  1. QUANTITY|TAG - integer of a block number, or the string "earliest", "latest" or "pending", as in the default block parameter.
params: [
   '0xe8', // 232
]
Returns

QUANTITY - integer of the number of transactions in this block.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getBlockTransactionCountByNumber","params":["0xe8"],"id":1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0xa" // 10
}

eth_getUncleCountByBlockHash

Returns the number of uncles in a block from a block matching the given block hash.

Parameters
  1. DATA, 32 Bytes - hash of a block
params: [
   '0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238'
]
Returns

QUANTITY - integer of the number of uncles in this block.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getUncleCountByBlockHash","params":["0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238"],"id"Block:1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x1" // 1
}

eth_getUncleCountByBlockNumber

Returns the number of uncles in a block from a block matching the given block number.

Parameters
  1. QUANTITY - integer of a block number, or the string "latest", "earliest" or "pending", see the default block parameter 
params: [
   '0xe8', // 232
]
Returns

QUANTITY - integer of the number of uncles in this block.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getUncleCountByBlockNumber","params":["0xe8"],"id":1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x1" // 1
}

eth_getCode

Returns code at a given address.

Parameters
  1. DATA, 20 Bytes - address
  2. QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the default block parameter 
params: [
   '0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b',
   '0x2'  // 2
]
Returns

DATA - the code from the given address.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getCode","params":["0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b", "0x2"],"id":1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x600160008035811a818181146012578301005b601b6001356025565b8060005260206000f25b600060078202905091905056"
}

eth_sign

Signs data with a given address.

Note the address to sign must be unlocked.

Parameters
  1. DATA, 20 Bytes - address
  2. DATA, Data to sign
Returns

DATA: Signed data

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_sign","params":["0xd1ade25ccd3d550a7eb532ac759cac7be09c2719", "Schoolbus"],"id":1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x2ac19db245478a06032e69cdbd2b54e648b78431d0a47bd1fbab18f79f820ba407466e37adbe9e84541cab97ab7d290f4a64a5825c876d22109f3bf813254e8628"
}

eth_sendTransaction

Creates new message call transaction or a contract creation, if the data field contains code.

Parameters
  1. Object - The transaction object
  • from: DATA, 20 Bytes - The address the transaction is send from.
  • to: DATA, 20 Bytes - (optional when creating new contract) The address the transaction is directed to.
  • gas: QUANTITY - (optional, default: 90000) Integer of the gas provided for the transaction execution. It will return unused gas.
  • gasPrice: QUANTITY - (optional, default: To-Be-Determined) Integer of the gasPrice used for each paid gas
  • value: QUANTITY - (optional) Integer of the value send with this transaction
  • data: DATA - The compiled code of a contract OR the hash of the invoked method signature and encoded parameters. For details see Ethereum Contract ABI
  • nonce: QUANTITY - (optional) Integer of a nonce. This allows to overwrite your own pending transactions that use the same nonce.
params: [{
  "from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
  "to": "0xd46e8dd67c5d32be8058bb8eb970870f072445675",
  "gas": "0x76c0", // 30400,
  "gasPrice": "0x9184e72a000", // 10000000000000
  "value": "0x9184e72a", // 2441406250
  "data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"
}]
Returns

DATA, 32 Bytes - the transaction hash, or the zero hash if the transaction is not yet available.

Use eth_getTransactionReceipt to get the contract address, after the transaction was mined, when you created a contract.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_sendTransaction","params":[{see above}],"id":1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331"
}

eth_sendRawTransaction

Creates new message call transaction or a contract creation for signed transactions.

Parameters
  1. DATA, The signed transaction data.
params: ["0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"]
Returns

DATA, 32 Bytes - the transaction hash, or the zero hash if the transaction is not yet available.

Use eth_getTransactionReceipt to get the contract address, after the transaction was mined, when you created a contract.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_sendRawTransaction","params":[{see above}],"id":1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331"
}

eth_call

Executes a new message call immediately without creating a transaction on the block chain.

Parameters
  1. Object - The transaction call object
  • from: DATA, 20 Bytes - (optional) The address the transaction is send from.
  • to: DATA, 20 Bytes - The address the transaction is directed to.
  • gas: QUANTITY - (optional) Integer of the gas provided for the transaction execution. eth_call consumes zero gas, but this parameter may be needed by some executions.
  • gasPrice: QUANTITY - (optional) Integer of the gasPrice used for each paid gas
  • value: QUANTITY - (optional) Integer of the value send with this transaction
  • data: DATA - (optional) Hash of the method signature and encoded parameters. For details see Ethereum Contract ABI
  1. QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the default block parameter
Returns

DATA - the return value of executed contract.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_call","params":[{see above}],"id":1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x0"
}

eth_estimateGas

Makes a call or transaction, which won't be added to the blockchain and returns the used gas, which can be used for estimating the used gas.

Parameters

See eth_call parameters, expect that all properties are optional.

Returns

QUANTITY - the amount of gas used.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_estimateGas","params":[{see above}],"id":1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x5208" // 21000
}

eth_getBlockByHash

Returns information about a block by hash.

Parameters
  1. DATA, 32 Bytes - Hash of a block.
  2. Boolean - If true it returns the full transaction objects, if false only the hashes of the transactions.
params: [
   '0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331',
   true
]
Returns

Object - A block object, or null when no block was found:

  • number: QUANTITY - the block number. null when its pending block.
  • hash: DATA, 32 Bytes - hash of the block. null when its pending block.
  • parentHash: DATA, 32 Bytes - hash of the parent block.
  • sealFields: an array of the fields for the block's seal or null when its pending block. For Ethash, this is the mixHash (DATA, 32 Bytes) followed by the nonce (DATA, 8 Bytes).
  • sha3Uncles: DATA, 32 Bytes - SHA3 of the uncles data in the block.
  • logsBloom: DATA, 256 Bytes - the bloom filter for the logs of the block. null when its pending block.
  • transactionsRoot: DATA, 32 Bytes - the root of the transaction trie of the block.
  • stateRoot: DATA, 32 Bytes - the root of the final state trie of the block.
  • receiptsRoot: DATA, 32 Bytes - the root of the receipts trie of the block.
  • miner: DATA, 20 Bytes - the address of the beneficiary to whom the mining rewards were given.
  • difficulty: QUANTITY - integer of the difficulty for this block.
  • totalDifficulty: QUANTITY - integer of the total difficulty of the chain until this block.
  • extraData: DATA - the "extra data" field of this block.
  • size: QUANTITY - integer the size of this block in bytes.
  • gasLimit: QUANTITY - the maximum gas allowed in this block.
  • gasUsed: QUANTITY - the total used gas by all transactions in this block.
  • timestamp: QUANTITY - the unix timestamp for when the block was collated.
  • transactions: Array - Array of transaction objects, or 32 Bytes transaction hashes depending on the last given parameter.
  • uncles: Array - Array of uncle hashes.
Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getBlockByHash","params":["0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331", true],"id":1}' localhost:8545

// Result
{
"id":1,
"jsonrpc":"2.0",
"result": {
    "number": "0x1b4", // 436
    "hash": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331",
    "parentHash": "0x9646252be9520f6e71339a8df9c55e4d7619deeb018d2a3f2d21fc165dde5eb5",
    "sealFields": ["0xe04d296d2460cfb8472af2c5fd05b5a214109c25688d3704aed5484f9a7792f2", "0x0000000000000042"],
    "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
    "logsBloom": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331",
    "transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
    "stateRoot": "0xd5855eb08b3387c0af375e9cdb6acfc05eb8f519e419b874b6ff2ffda7ed1dff",
    "miner": "0x4e65fda2159562a496f9f3522f89122a3088497a",
    "difficulty": "0x027f07", // 163591
    "totalDifficulty":  "0x027f07", // 163591
    "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "size":  "0x027f07", // 163591
    "gasLimit": "0x9f759", // 653145
    "minGasPrice": "0x9f759", // 653145
    "gasUsed": "0x9f759", // 653145
    "timestamp": "0x54e34e8e" // 1424182926
    "transactions": [{...},{ ... }] 
    "uncles": ["0x1606e5...", "0xd5145a9..."]
  }
}

eth_getBlockByNumber

Returns information about a block by block number.

Parameters
  1. QUANTITY|TAG - integer of a block number, or the string "earliest", "latest" or "pending", as in the default block parameter.
  2. Boolean - If true it returns the full transaction objects, if false only the hashes of the transactions.
params: [
   '0x1b4', // 436
   true
]
Returns

See eth_getBlockByHash

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getBlockByNumber","params":["0x1b4", true],"id":1}' localhost:8545

Result see eth_getBlockByHash

eth_getTransactionByHash

Returns the information about a transaction requested by transaction hash.

Parameters
  1. DATA, 32 Bytes - hash of a transaction
params: [
   "0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238"
]
Returns

Object - A transaction object, or null when no transaction was found:

  • hash: DATA, 32 Bytes - hash of the transaction.
  • nonce: QUANTITY - the number of transactions made by the sender prior to this one.
  • blockHash: DATA, 32 Bytes - hash of the block where this transaction was in. null when its pending.
  • blockNumber: QUANTITY - block number where this transaction was in. null when its pending.
  • transactionIndex: QUANTITY - integer of the transactions index position in the block. null when its pending.
  • from: DATA, 20 Bytes - address of the sender.
  • to: DATA, 20 Bytes - address of the receiver. null when its a contract creation transaction.
  • value: QUANTITY - value transferred in Wei.
  • gasPrice: QUANTITY - gas price provided by the sender in Wei.
  • gas: QUANTITY - gas provided by the sender.
  • input: DATA - the data send along with the transaction.
Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getTransactionByHash","params":["0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238"],"id":1}' localhost:8545

// Result
{
"id":1,
"jsonrpc":"2.0",
"result": {
    "hash":"0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b",
    "nonce":"0x",
    "blockHash": "0xbeab0aa2411b7ab17f30a99d3cb9c6ef2fc5426d6ad6fd9e2a26a6aed1d1055b",
    "blockNumber": "0x15df", // 5599
    "transactionIndex":  "0x1", // 1
    "from":"0x407d73d8a49eeb85d32cf465507dd71d507100c1",
    "to":"0x85h43d8a49eeb85d32cf465507dd71d507100c1",
    "value":"0x7f110" // 520464
    "gas": "0x7f110" // 520464
    "gasPrice":"0x09184e72a000",
    "input":"0x603880600c6000396000f300603880600c6000396000f3603880600c6000396000f360",
  }
}

eth_getTransactionByBlockHashAndIndex

Returns information about a transaction by block hash and transaction index position.

Parameters
  1. DATA, 32 Bytes - hash of a block.
  2. QUANTITY - integer of the transaction index position.
params: [
   '0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331',
   '0x0' // 0
]
Returns

See eth_getBlockByHash

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getTransactionByBlockHashAndIndex","params":[0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b, "0x0"],"id":1}' localhost:8545

Result see eth_getTransactionByHash

eth_getTransactionByBlockNumberAndIndex

Returns information about a transaction by block number and transaction index position.

Parameters
  1. QUANTITY|TAG - a block number, or the string "earliest", "latest" or "pending", as in the default block parameter.
  2. QUANTITY - the transaction index position.
params: [
   '0x29c', // 668
   '0x0' // 0
]
Returns

See eth_getBlockByHash

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getTransactionByBlockNumberAndIndex","params":["0x29c", "0x0"],"id":1}' localhost:8545

Result see eth_getTransactionByHash

eth_getTransactionReceipt

Returns the receipt of a transaction by transaction hash.

Note That the receipt is available even for pending transactions.

Parameters
  1. DATA, 32 Bytes - hash of a transaction
params: [
   '0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238'
]
Returns

Object - A transaction receipt object, or null when no receipt was found:

  • transactionHash : DATA, 32 Bytes - hash of the transaction.
  • transactionIndex: QUANTITY - integer of the transactions index position in the block.
  • blockHash: DATA, 32 Bytes - hash of the block where this transaction was in.
  • blockNumber: QUANTITY - block number where this transaction was in.
  • cumulativeGasUsed : QUANTITY - The total amount of gas used when this transaction was executed in the block.
  • gasUsed : QUANTITY - The amount of gas used by this specific transaction alone.
  • contractAddress : DATA, 20 Bytes - The contract address created, if the transaction was a contract creation, otherwise null.
  • logs: Array - Array of log objects, which this transaction generated.
Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getTransactionReceipt","params":["0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238"],"id":1}' localhost:8545

// Result
{
"id":1,
"jsonrpc":"2.0",
"result": {
     transactionHash: '0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238',
     transactionIndex:  '0x1', // 1
     blockNumber: '0xb', // 11
     blockHash: '0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b',
     cumulativeGasUsed: '0x33bc', // 13244
     gasUsed: '0x4dc', // 1244
     contractAddress: '0xb60e8dd61c5d32be8058bb8eb970870f07233155' // or null, if none was created
     logs: [{
         // logs as returned by getFilterLogs, etc.
     }, ...]
  }
}

eth_getUncleByBlockHashAndIndex

Returns information about a uncle of a block by hash and uncle index position.

Parameters
  1. DATA, 32 Bytes - hash a block.
  2. QUANTITY - the uncle's index position.
params: [
   '0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b',
   '0x0' // 0
]
Returns

See eth_getBlockByHash

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getUncleByBlockHashAndIndex","params":["0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b", "0x0"],"id":1}' localhost:8545

Result see eth_getBlockByHash

Note: An uncle doesn't contain individual transactions.

eth_getUncleByBlockNumberAndIndex

Returns information about a uncle of a block by number and uncle index position.

Parameters
  1. QUANTITY|TAG - a block number, or the string "earliest", "latest" or "pending", as in the default block parameter.
  2. QUANTITY - the uncle's index position.
params: [
   '0x29c', // 668
   '0x0' // 0
]
Returns

See eth_getBlockByHash

Note: An uncle doesn't contain individual transactions.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getUncleByBlockNumberAndIndex","params":["0x29c", "0x0"],"id":1}' localhost:8545

Result see eth_getBlockByHash

eth_getCompilers

Returns a list of available compilers in the client.

Parameters

none

Returns

Array - Array of available compilers.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getCompilers","params":[],"id":1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": ["solidity", "lll", "serpent"]
}

eth_compileSolidity

Returns compiled solidity code.

Parameters
  1. String - The source code.
params: [
   "contract test { function multiply(uint a) returns(uint d) {   return a * 7;   } }",
]
Returns

DATA - The compiled source code.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_compileSolidity","params":["contract test { function multiply(uint a) returns(uint d) {   return a * 7;   } }"],"id":1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": {
      "code": "0x605880600c6000396000f3006000357c010000000000000000000000000000000000000000000000000000000090048063c6888fa114602e57005b603d6004803590602001506047565b8060005260206000f35b60006007820290506053565b91905056",
      "info": {
        "source": "contract test {\n   function multiply(uint a) constant returns(uint d) {\n       return a * 7;\n   }\n}\n",
        "language": "Solidity",
        "languageVersion": "0",
        "compilerVersion": "0.9.19",
        "abiDefinition": [
          {
            "constant": true,
            "inputs": [
              {
                "name": "a",
                "type": "uint256"
              }
            ],
            "name": "multiply",
            "outputs": [
              {
                "name": "d",
                "type": "uint256"
              }
            ],
            "type": "function"
          }
        ],
        "userDoc": {
          "methods": {}
        },
        "developerDoc": {
          "methods": {}
        }
      }

}

eth_compileLLL

Returns compiled LLL code.

Parameters
  1. String - The source code.
params: [
   "(returnlll (suicide (caller)))",
]
Returns

DATA - The compiled source code.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_compileLLL","params":["(returnlll (suicide (caller)))"],"id":1}' localhost: 8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x603880600c6000396000f3006001600060e060020a600035048063c6888fa114601857005b6021600435602b565b8060005260206000f35b600081600702905091905056" // the compiled source code
}

eth_compileSerpent

Returns compiled serpent code.

Parameters
  1. String - The source code.
params: [
   "/* some serpent */",
]
Returns

DATA - The compiled source code.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_compileSerpent","params":["/* some serpent */"],"id":1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x603880600c6000396000f3006001600060e060020a600035048063c6888fa114601857005b6021600435602b565b8060005260206000f35b600081600702905091905056" // the compiled source code
}

eth_newFilter

Creates a filter object, based on filter options, to notify when the state changes (logs). To check if the state has changed, call eth_getFilterChanges.

A note on specifying topic filters:

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)"
Parameters
  1. Object - The filter options:
  • fromBlock: QUANTITY|TAG - (optional, default: "latest") Integer block number, or "latest" for the last mined block or "pending", "earliest" for not yet mined transactions.
  • toBlock: QUANTITY|TAG - (optional, default: "latest") Integer block number, or "latest" for the last mined block or "pending", "earliest" for not yet mined transactions.
  • address: DATA|Array, 20 Bytes - (optional) Contract address or a list of addresses from which logs should originate.
  • topics: Array of DATA, - (optional) Array of 32 Bytes DATA topics. Topics are order-dependent. Each topic can also be an array of DATA with "or" options.
params: [{
  "fromBlock": "0x1",
  "toBlock": "0x2",
  "address": "0x8888f1f195afa192cfee860698584c030f4c9db1",
  "topics": ["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b", null, [0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b, 0x000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc]]
}]
Returns

QUANTITY - A filter id.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_newFilter","params":[{"topics":["0x12341234"]}],"id":1}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x1" // 1
}

eth_newBlockFilter

Creates a filter in the node, to notify when a new block arrives. To check if the state has changed, call eth_getFilterChanges.

Parameters

None

Returns

QUANTITY - A filter id.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_newBlockFilter","params":[],"id":73}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc":  "2.0",
  "result": "0x1" // 1
}

eth_newPendingTransactionFilter

Creates a filter in the node, to notify when new pending transactions arrive. To check if the state has changed, call eth_getFilterChanges.

Parameters

None

Returns

QUANTITY - A filter id.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_newPendingTransactionFilter","params":[],"id":73}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc":  "2.0",
  "result": "0x1" // 1
}

eth_uninstallFilter

Uninstalls a filter with given id. Should always be called when watch is no longer needed. Additonally Filters timeout when they aren't requested with eth_getFilterChanges for a period of time.

Parameters
  1. QUANTITY - The filter id.
params: [
  "0xb" // 11
]
Returns

Boolean - true if the filter was successfully uninstalled, otherwise false.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_uninstallFilter","params":["0xb"],"id":73}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": true
}

eth_getFilterChanges

Polling method for a filter, which returns an array of logs which occurred since last poll.

Parameters
  1. QUANTITY - the filter id.
params: [
  "0x16" // 22
]
Returns

Array - Array of log objects, or an empty array if nothing has changed since last poll.

  • For filters created with eth_newBlockFilter the return are block hashes (DATA, 32 Bytes), e.g. ["0x3454645634534..."].

  • For filters created with eth_newPendingTransactionFilter the return are transaction hashes (DATA, 32 Bytes), e.g. ["0x6345343454645..."].

  • For filters created with eth_newFilter logs are objects with following params:

    • type: TAG - pending when the log is pending. mined if log is already mined.
    • logIndex: QUANTITY - integer of the log index position in the block. null when its pending log.
    • transactionIndex: QUANTITY - integer of the transactions index position log was created from. null when its pending log.
    • transactionHash: DATA, 32 Bytes - hash of the transactions this log was created from. null when its pending log.
    • blockHash: DATA, 32 Bytes - hash of the block where this log was in. null when its pending. null when its pending log.
    • blockNumber: QUANTITY - the block number where this log was in. null when its pending. null when its pending log.
    • address: DATA, 20 Bytes - address from which this log originated.
    • data: DATA - contains one or more 32 Bytes non-indexed arguments of the log.
    • topics: Array of DATA - Array of 0 to 4 32 Bytes DATA of indexed log arguments. (In solidity: The first topic is the hash of the signature of the event (e.g. Deposit(address,bytes32,uint256)), except you declared the event with the anonymous specifier.)
Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getFilterChanges","params":["0x16"],"id":73}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc":"2.0",
  "result": [{
    "logIndex": "0x1", // 1
    "blockNumber":"0x1b4" // 436
    "blockHash": "0x8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcfdf829c5a142f1fccd7d",
    "transactionHash":  "0xdf829c5a142f1fccd7d8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcf",
    "transactionIndex": "0x0", // 0
    "address": "0x16c5785ac562ff41e2dcfdf829c5a142f1fccd7d",
    "data":"0x0000000000000000000000000000000000000000000000000000000000000000",
    "topics": ["0x59ebeb90bc63057b6515673c3ecf9438e5058bca0f92585014eced636878c9a5"]
    },{
      ...
    }]
}

eth_getFilterLogs

Returns an array of all logs matching filter with given id.

Parameters
  1. QUANTITY - The filter id.
params: [
  "0x16" // 22
]
Returns

See eth_getFilterChanges

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getFilterLogs","params":["0x16"],"id":74}' localhost:8545

Result see eth_getFilterChanges

eth_getLogs

Returns an array of all logs matching a given filter object.

Parameters
  1. Object - the filter object, see eth_newFilter parameters.
params: [{
  "topics": ["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b"]
}]
Returns

See eth_getFilterChanges

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getLogs","params":[{"topics":["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b"]}],"id":74}' localhost:8545

Result see eth_getFilterChanges

eth_getWork

Returns the hash of the current block, the seedHash, and the boundary condition to be met ("target").

Parameters

none

Returns

Array - Array with the following properties:

  1. DATA, 32 Bytes - current block header pow-hash.
  2. DATA, 32 Bytes - the seed hash used for the DAG.
  3. DATA, 32 Bytes - the boundary condition ("target"), 2^256 / difficulty.
  4. QUANTITY - the current block number.
Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getWork","params":[],"id":73}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc":"2.0",
  "result": [
      "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
      "0x5EED00000000000000000000000000005EED0000000000000000000000000000",
      "0xd1ff1c01710000000000000000000000d1ff1c01710000000000000000000000",
      "0x1"
    ]
}

eth_submitWork

Used for submitting a proof-of-work solution.

Parameters
  1. DATA, 8 Bytes - The nonce found (64 bits)
  2. DATA, 32 Bytes - The header's pow-hash (256 bits)
  3. DATA, 32 Bytes - The mix digest (256 bits)
params: [
  "0x0000000000000001",
  "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
  "0xD1FE5700000000000000000000000000D1FE5700000000000000000000000000"
]
Returns

Boolean - returns true if the provided solution is valid, otherwise false.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0", "method":"eth_submitWork", "params":["0x0000000000000001", "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef", "0xD1GE5700000000000000000000000000D1GE5700000000000000000000000000"],"id":73}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc":"2.0",
  "result": true
}

eth_submitHashrate

Used for submitting mining hashrate.

Parameters
  1. Hashrate, a hexadecimal string representation (32 bytes) of the hash rate
  2. ID, String - A random hexadecimal(32 bytes) ID identifying the client
params: [
  "0x0000000000000000000000000000000000000000000000000000000000500000",
  "0x59daa26581d0acd1fce254fb7e85952f4c09d0915afd33d3886cd914bc7d283c"
]
Returns

Boolean - returns true if submitting went through succesfully and false otherwise.

Example
// Request
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0", "method":"eth_submitHashrate", "params":["0x0000000000000000000000000000000000000000000000000000000000500000", "0x59daa26581d0acd1fce254fb7e85952f4c09d0915afd33d3886cd914bc7d283c"],"id":73}' localhost:8545

// Result
{
  "id":73,
  "jsonrpc":"2.0",
  "result": true
}
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