json-rpc | Ethereum Wiki
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¶ JSON RPC API
JSON is a lightweight data-interchange format. It can represent numbers, strings, ordered sequences of values, and collections of name/value pairs.
JSON-RPC is a stateless, light-weight remote procedure call (RPC) protocol. Primarily this specification defines several data structures and the rules around their processing. It is transport agnostic in that the concepts can be used within the same process, over sockets, over HTTP, or in many various message passing environments. It uses JSON (RFC 4627) as data format.
Geth 1.4 has experimental pub/sub support. See this page for more information.
Parity 1.6 has experimental pub/sub support See this for more information.
Hyperledger Besu 1.3 has pub/sub support. See this for more information.
¶ JavaScript API
To talk to an ethereum node from inside a JavaScript application use the web3.js library, which gives a convenient interface for the RPC methods.
See the JavaScript API for more details.
¶ JSON-RPC Endpoint
Default JSON-RPC endpoints:
¶ Go
You can start the HTTP JSON-RPC with the --rpc
flag:
geth --rpc
change the default port (8545) and listing address (localhost) with:
geth --rpc --rpcaddr <ip> --rpcport <portnumber>
If accessing the RPC from a browser, CORS will need to be enabled with the appropriate domain set. Otherwise, JavaScript calls are limit by the same-origin policy and requests will fail:
geth --rpc --rpccorsdomain "http://localhost:3000"
The JSON RPC can also be started from the geth console using the admin.startRPC(addr, port)
command.
¶ C++
You can start it by running eth
application with -j
option:
./eth -j
You can also specify JSON-RPC port (default is 8545):
./eth -j --json-rpc-port 8079
¶ Python
In python the JSONRPC server is currently started by default and listens on 127.0.0.1:4000
You can change the port and listen address by giving a config option.
pyethapp -c jsonrpc.listen_port=4002 -c jsonrpc.listen_host=127.0.0.2 run
¶ Java
Run a Besu node on mainnet with the HTTP JSON-RPC service enabled:
besu --rpc-http-enabled
More details can be found in the documentation.
¶ JSON-RPC support
cpp-ethereum go-ethereum py-ethereum parity hyperledger-besuJSON-RPC 1.0 ✓ JSON-RPC 2.0 ✓ ✓ ✓ ✓ ✓Batch requests ✓ ✓ ✓ ✓ ✓HTTP ✓ ✓ ✓ ✓ ✓IPC ✓ ✓ ✓ WS ✓ ✓ ✓¶ HEX value encoding
At present there are two key datatypes that are passed over JSON: unformatted byte arrays and quantities. Both are passed with a hex encoding, however with different requirements to formatting:
When encoding QUANTITIES (integers, numbers): encode as hex, prefix with “0x”, the most compact representation (slight exception: zero should be represented as “0x0”). Examples:
- 0x41 (65 in decimal)
- 0x400 (1024 in decimal)
- WRONG: 0x (should always have at least one digit - zero is “0x0”)
- WRONG: 0x0400 (no leading zeroes allowed)
- WRONG: ff (must be prefixed 0x)
When encoding UNFORMATTED DATA (byte arrays, account addresses, hashes, bytecode arrays): encode as hex, prefix with “0x”, two hex digits per byte. Examples:
- 0x41 (size 1, “A”)
- 0x004200 (size 3, “\0B\0”)
- 0x (size 0, “”)
- WRONG: 0xf0f0f (must be even number of digits)
- WRONG: 004200 (must be prefixed 0x)
Currently cpp-ethereum,go-ethereum, and parity provide JSON-RPC communication over http and IPC (unix socket Linux and OSX/named pipes on Windows). Version 1.4 of go-ethereum, version 1.6 of Parity and version 1.3 of Hyperledger Besu onwards have websocket support.
¶ The default block parameter
The following methods have an extra default block parameter:
When requests are made that act on the state of ethereum, the last default block parameter determines the height of the block.
The following options are possible for the defaultBlock parameter:
HEX String
- an integer block numberString "earliest"
for the earliest/genesis blockString "latest"
- for the latest mined blockString "pending"
- for the pending state/transactions
¶ Curl Examples Explained
The curl options below might return a response where the node complains about the content type, this is because the --data option sets the content type to application/x-www-form-urlencoded . If your node does complain, manually set the header by placing -H “Content-Type: application/json” at the start of the call.
The examples also do not include the URL/IP & port combination which must be the last argument given to curl e.x. 127.0.0.1:8545
¶ JSON-RPC methods
¶ JSON RPC API Reference
¶ web3_clientVersion
Returns the current client version.
¶ Parameters
¶ Returns
String
- The current client version
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"web3_clientVersion","params":[],"id":67}'
// Result
{
"id":67,
"jsonrpc":"2.0",
"result": "Mist/v0.9.3/darwin/go1.4.1"
}
¶ web3_sha3
Returns Keccak-256 (not the standardized SHA3-256) of the given data.
¶ Parameters
DATA
- the data to convert into a SHA3 hash
params: [
"0x68656c6c6f20776f726c64"
]
¶ Returns
DATA
- The SHA3 result of the given string.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"web3_sha3","params":["0x68656c6c6f20776f726c64"],"id":64}'
// Result
{
"id":64,
"jsonrpc": "2.0",
"result": "0x47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad"
}
¶ net_version
Returns the current network id.
¶ Parameters
¶ Returns
String
- The current network id.
"1"
: Ethereum Mainnet"2"
: Morden Testnet (deprecated)"3"
: Ropsten Testnet"4"
: Rinkeby Testnet"42"
: Kovan Testnet
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"net_version","params":[],"id":67}'
// Result
{
"id":67,
"jsonrpc": "2.0",
"result": "3"
}
¶ net_listening
Returns true
if client is actively listening for network connections.
¶ Parameters
¶ Returns
Boolean
- true
when listening, otherwise false
.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"net_listening","params":[],"id":67}'
// Result
{
"id":67,
"jsonrpc":"2.0",
"result":true
}
¶ net_peerCount
Returns number of peers currently connected to the client.
¶ Parameters
¶ Returns
QUANTITY
- integer of the number of connected peers.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"net_peerCount","params":[],"id":74}'
// Result
{
"id":74,
"jsonrpc": "2.0",
"result": "0x2" // 2
}
¶ eth_protocolVersion
Returns the current ethereum protocol version.
¶ Parameters
¶ Returns
String
- The current ethereum protocol version
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_protocolVersion","params":[],"id":67}'
// Result
{
"id":67,
"jsonrpc": "2.0",
"result": "54"
}
¶ eth_syncing
Returns an object with data about the sync status or false
.
¶ Parameters
¶ 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_blockNumberhighestBlock
:QUANTITY
- The estimated highest block
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_syncing","params":[],"id":1}'
// 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
¶ Returns
DATA
, 20 bytes - the current coinbase address.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_coinbase","params":[],"id":64}'
// Result
{
"id":64,
"jsonrpc": "2.0",
"result": "0x407d73d8a49eeb85d32cf465507dd71d507100c1"
}
¶ eth_mining
Returns true
if client is actively mining new blocks.
¶ Parameters
¶ Returns
Boolean
- returns true
of the client is mining, otherwise false
.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_mining","params":[],"id":71}'
// Result
{
"id":71,
"jsonrpc": "2.0",
"result": true
}
¶ eth_hashrate
Returns the number of hashes per second that the node is mining with.
¶ Parameters
¶ Returns
QUANTITY
- number of hashes per second.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_hashrate","params":[],"id":71}'
// Result
{
"id":71,
"jsonrpc": "2.0",
"result": "0x38a"
}
¶ eth_gasPrice
Returns the current price per gas in wei.
¶ Parameters
¶ Returns
QUANTITY
- integer of the current gas price in wei.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_gasPrice","params":[],"id":73}'
// Result
{
"id":73,
"jsonrpc": "2.0",
"result": "0x1dfd14000" // 8049999872 Wei
}
¶ eth_accounts
Returns a list of addresses owned by client.
¶ Parameters
¶ Returns
Array of DATA
, 20 Bytes - addresses owned by the client.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_accounts","params":[],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": ["0x407d73d8a49eeb85d32cf465507dd71d507100c1"]
}
¶ eth_blockNumber
Returns the number of most recent block.
¶ Parameters
¶ Returns
QUANTITY
- integer of the current block number the client is on.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":83}'
// Result
{
"id":83,
"jsonrpc": "2.0",
"result": "0x4b7" // 1207
}
¶ eth_getBalance
Returns the balance of the account of given address.
¶ Parameters
DATA
, 20 Bytes - address to check for balance.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 -X POST --data '{"jsonrpc":"2.0","method":"eth_getBalance","params":["0x407d73d8a49eeb85d32cf465507dd71d507100c1", "latest"],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0x0234c8a3397aab58" // 158972490234375000
}
¶ eth_getStorageAt
Returns the value from a storage position at a given address.
¶ Parameters
DATA
, 20 Bytes - address of the storage.QUANTITY
- integer of the position in the storage.QUANTITY|TAG
- integer block number, or the string"latest"
,"earliest"
or"pending"
, see the default block parameter
¶ Returns
DATA
- the value at this storage position.
¶ Example
Calculating the correct position depends on the storage to retrieve. Consider the following contract deployed at 0x295a70b2de5e3953354a6a8344e616ed314d7251
by address 0x391694e7e0b0cce554cb130d723a9d27458f9298
.
contract Storage {
uint pos0;
mapping(address => uint) pos1;
function Storage() {
pos0 = 1234;
pos1[msg.sender] = 5678;
}
}
Retrieving the value of pos0 is straight forward:
curl -X POST --data '{"jsonrpc":"2.0", "method": "eth_getStorageAt", "params": ["0x295a70b2de5e3953354a6a8344e616ed314d7251", "0x0", "latest"], "id": 1}' localhost:8545
{"jsonrpc":"2.0","id":1,"result":"0x00000000000000000000000000000000000000000000000000000000000004d2"}
Retrieving an element of the map is harder. The position of an element in the map is calculated with:
keccack(LeftPad32(key, 0), LeftPad32(map position, 0))
This means to retrieve the storage on pos1[“0x391694e7e0b0cce554cb130d723a9d27458f9298”] we need to calculate the position with:
keccak(decodeHex("000000000000000000000000391694e7e0b0cce554cb130d723a9d27458f9298" + "0000000000000000000000000000000000000000000000000000000000000001"))
The geth console which comes with the web3 library can be used to make the calculation:
> var key = "000000000000000000000000391694e7e0b0cce554cb130d723a9d27458f9298" + "0000000000000000000000000000000000000000000000000000000000000001"
undefined
> web3.sha3(key, {"encoding": "hex"})
"0x6661e9d6d8b923d5bbaab1b96e1dd51ff6ea2a93520fdc9eb75d059238b8c5e9"
Now to fetch the storage:
curl -X POST --data '{"jsonrpc":"2.0", "method": "eth_getStorageAt", "params": ["0x295a70b2de5e3953354a6a8344e616ed314d7251", "0x6661e9d6d8b923d5bbaab1b96e1dd51ff6ea2a93520fdc9eb75d059238b8c5e9", "latest"], "id": 1}' localhost:8545
{"jsonrpc":"2.0","id":1,"result":"0x000000000000000000000000000000000000000000000000000000000000162e"}
¶ eth_getTransactionCount
Returns the number of transactions sent from an address.
¶ Parameters
DATA
, 20 Bytes - address.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 -X POST --data '{"jsonrpc":"2.0","method":"eth_getTransactionCount","params":["0x407d73d8a49eeb85d32cf465507dd71d507100c1","latest"],"id":1}'
// 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
DATA
, 32 Bytes - hash of a block
params: [
'0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238'
]
¶ Returns
QUANTITY
- integer of the number of transactions in this block.
¶ Example
// Request
curl -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 matching the given block number.
¶ Parameters
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 -X POST --data '{"jsonrpc":"2.0","method":"eth_getBlockTransactionCountByNumber","params":["0xe8"],"id":1}'
// 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
DATA
, 32 Bytes - hash of a block
params: [
'0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238'
]
¶ Returns
QUANTITY
- integer of the number of uncles in this block.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_getUncleCountByBlockHash","params":["0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238"],"id":1}'
// 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
QUANTITY|TAG
- 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 -X POST --data '{"jsonrpc":"2.0","method":"eth_getUncleCountByBlockNumber","params":["0xe8"],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0x1" // 1
}
¶ eth_getCode
Returns code at a given address.
¶ Parameters
DATA
, 20 Bytes - addressQUANTITY|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 -X POST --data '{"jsonrpc":"2.0","method":"eth_getCode","params":["0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b", "0x2"],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0x600160008035811a818181146012578301005b601b6001356025565b8060005260206000f25b600060078202905091905056"
}
¶ eth_sign
The sign method calculates an Ethereum specific signature with: sign(keccak256("\x19Ethereum Signed Message:\n" + len(message) + message)))
.
By adding a prefix to the message makes the calculated signature recognisable as an Ethereum specific signature. This prevents misuse where a malicious DApp can sign arbitrary data (e.g. transaction) and use the signature to impersonate the victim.
Note the address to sign with must be unlocked.
¶ Parameters
account, message
DATA
, 20 Bytes - addressDATA
, N Bytes - message to sign
¶ Returns
DATA
: Signature
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_sign","params":["0x9b2055d370f73ec7d8a03e965129118dc8f5bf83", "0xdeadbeaf"],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0xa3f20717a250c2b0b729b7e5becbff67fdaef7e0699da4de7ca5895b02a170a12d887fd3b17bfdce3481f10bea41f45ba9f709d39ce8325427b57afcfc994cee1b"
}
An example how to use solidity ecrecover to verify the signature calculated with eth_sign
can be found here. The contract is deployed on the testnet Ropsten and Rinkeby.
¶ eth_signTransaction
Signs a transaction that can be submitted to the network at a later time using with eth_sendRawTransaction.
¶ Parameters
Object
- The transaction object
from
:DATA
, 20 Bytes - The address the transaction is sent 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, in Wei.value
:QUANTITY
- (optional) Integer of the value sent with this transaction, in Wei.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.
¶ Returns
DATA
, The signed transaction object.
¶ Example
// Request
curl -X POST --data '{
"id": 1,
"jsonrpc": "2.0",
"method": "eth_signTransaction",
"params": [{
"data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675",
"from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
"gas": "0x76c0",
"gasPrice": "0x9184e72a000",
"to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
"value": "0x9184e72a"
}]
}'
// Result
{
"id": 1,
"jsonrpc": "2.0",
"result": "0xa3f20717a250c2b0b729b7e5becbff67fdaef7e0699da4de7ca5895b02a170a12d887fd3b17bfdce3481f10bea41f45ba9f709d39ce8325427b57afcfc994cee1b"
}
¶ eth_sendTransaction
Creates new message call transaction or a contract creation, if the data field contains code.
¶ Parameters
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 gasvalue
:QUANTITY
- (optional) Integer of the value sent with this transactiondata
:DATA
- The compiled code of a contract OR the hash of the invoked method signature and encoded parameters. For details see Ethereum Contract ABInonce
:QUANTITY
- (optional) Integer of a nonce. This allows to overwrite your own pending transactions that use the same nonce.
params: [{
"from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
"to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
"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 -X POST --data '{"jsonrpc":"2.0","method":"eth_sendTransaction","params":[{see above}],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331"
}
¶ eth_sendRawTransaction
Creates new message call transaction or a contract creation for signed transactions.
¶ Parameters
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 -X POST --data '{"jsonrpc":"2.0","method":"eth_sendRawTransaction","params":[{see above}],"id":1}'
// 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
Object
- The transaction call object
from
:DATA
, 20 Bytes - (optional) The address the transaction is sent 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 gasvalue
:QUANTITY
- (optional) Integer of the value sent with this transactiondata
:DATA
- (optional) Hash of the method signature and encoded parameters. For details see Ethereum Contract ABI in the Solidity documentation
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 -X POST --data '{"jsonrpc":"2.0","method":"eth_call","params":[{see above}],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0x"
}
¶ eth_estimateGas
Generates and returns an estimate of how much gas is necessary to allow the transaction to complete. The transaction will not be added to the blockchain. Note that the estimate may be significantly more than the amount of gas actually used by the transaction, for a variety of reasons including EVM mechanics and node performance.
¶ Parameters
See eth_call parameters, expect that all properties are optional. If no gas limit is specified geth uses the block gas limit from the pending block as an upper bound. As a result the returned estimate might not be enough to executed the call/transaction when the amount of gas is higher than the pending block gas limit.
¶ Returns
QUANTITY
- the amount of gas used.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_estimateGas","params":[{see above}],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0x5208" // 21000
}
¶ eth_getBlockByHash
Returns information about a block by hash.
¶ Parameters
DATA
, 32 Bytes - Hash of a block.Boolean
- Iftrue
it returns the full transaction objects, iffalse
only the hashes of the transactions.
params: [
'0xdc0818cf78f21a8e70579cb46a43643f78291264dda342ae31049421c82d21ae',
false
]
¶ 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.nonce
:DATA
, 8 Bytes - hash of the generated proof-of-work.null
when its pending block.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 -X POST --data '{"jsonrpc":"2.0","method":"eth_getBlockByHash","params":["0xdc0818cf78f21a8e70579cb46a43643f78291264dda342ae31049421c82d21ae", false],"id":1}'
// Result
{
{
"jsonrpc": "2.0",
"id": 1,
"result": {
"difficulty": "0x4ea3f27bc",
"extraData": "0x476574682f4c5649562f76312e302e302f6c696e75782f676f312e342e32",
"gasLimit": "0x1388",
"gasUsed": "0x0",
"hash": "0xdc0818cf78f21a8e70579cb46a43643f78291264dda342ae31049421c82d21ae",
"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
"miner": "0xbb7b8287f3f0a933474a79eae42cbca977791171",
"mixHash": "0x4fffe9ae21f1c9e15207b1f472d5bbdd68c9595d461666602f2be20daf5e7843",
"nonce": "0x689056015818adbe",
"number": "0x1b4",
"parentHash": "0xe99e022112df268087ea7eafaf4790497fd21dbeeb6bd7a1721df161a6657a54",
"receiptsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
"sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
"size": "0x220",
"stateRoot": "0xddc8b0234c2e0cad087c8b389aa7ef01f7d79b2570bccb77ce48648aa61c904d",
"timestamp": "0x55ba467c",
"totalDifficulty": "0x78ed983323d",
"transactions": [
],
"transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
"uncles": [
]
}
}
¶ eth_getBlockByNumber
Returns information about a block by block number.
¶ Parameters
QUANTITY|TAG
- integer of a block number, or the string"earliest"
,"latest"
or"pending"
, as in the default block parameter.Boolean
- Iftrue
it returns the full transaction objects, iffalse
only the hashes of the transactions.
params: [
'0x1b4', // 436
true
]
¶ Returns
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_getBlockByNumber","params":["0x1b4", true],"id":1}'
Result see eth_getBlockByHash
¶ eth_getTransactionByHash
Returns the information about a transaction requested by transaction hash.
¶ Parameters
DATA
, 32 Bytes - hash of a transaction
params: [
"0x88df016429689c079f3b2f6ad39fa052532c56795b733da78a91ebe6a713944b"
]
¶ Returns
Object
- A transaction object, or null
when no transaction was found:
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.from
:DATA
, 20 Bytes - address of the sender.gas
:QUANTITY
- gas provided by the sender.gasPrice
:QUANTITY
- gas price provided by the sender in Wei.hash
:DATA
, 32 Bytes - hash of the transaction.input
:DATA
- the data send along with the transaction.nonce
:QUANTITY
- the number of transactions made by the sender prior to this one.to
:DATA
, 20 Bytes - address of the receiver.null
when its a contract creation transaction.transactionIndex
:QUANTITY
- integer of the transactions index position in the block.null
when its pending.value
:QUANTITY
- value transferred in Wei.v
:QUANTITY
- ECDSA recovery idr
:DATA
, 32 Bytes - ECDSA signature rs
:DATA
, 32 Bytes - ECDSA signature s
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_getTransactionByHash","params":["0x88df016429689c079f3b2f6ad39fa052532c56795b733da78a91ebe6a713944b"],"id":1}'
// Result
{
"jsonrpc":"2.0",
"id":1,
"result":{
"blockHash":"0x1d59ff54b1eb26b013ce3cb5fc9dab3705b415a67127a003c3e61eb445bb8df2",
"blockNumber":"0x5daf3b", // 6139707
"from":"0xa7d9ddbe1f17865597fbd27ec712455208b6b76d",
"gas":"0xc350", // 50000
"gasPrice":"0x4a817c800", // 20000000000
"hash":"0x88df016429689c079f3b2f6ad39fa052532c56795b733da78a91ebe6a713944b",
"input":"0x68656c6c6f21",
"nonce":"0x15", // 21
"to":"0xf02c1c8e6114b1dbe8937a39260b5b0a374432bb",
"transactionIndex":"0x41", // 65
"value":"0xf3dbb76162000", // 4290000000000000
"v":"0x25", // 37
"r":"0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea",
"s":"0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c"
}
}
¶ eth_getTransactionByBlockHashAndIndex
Returns information about a transaction by block hash and transaction index position.
¶ Parameters
DATA
, 32 Bytes - hash of a block.QUANTITY
- integer of the transaction index position.
params: [
'0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331',
'0x0' // 0
]
¶ Returns
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_getTransactionByBlockHashAndIndex","params":["0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b", "0x0"],"id":1}'
Result see eth_getTransactionByHash
¶ eth_getTransactionByBlockNumberAndIndex
Returns information about a transaction by block number and transaction index position.
¶ Parameters
QUANTITY|TAG
- a block number, or the string"earliest"
,"latest"
or"pending"
, as in the default block parameter.QUANTITY
- the transaction index position.
params: [
'0x29c', // 668
'0x0' // 0
]
¶ Returns
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_getTransactionByBlockNumberAndIndex","params":["0x29c", "0x0"],"id":1}'
Result see eth_getTransactionByHash
¶ eth_getTransactionReceipt
Returns the receipt of a transaction by transaction hash.
Note That the receipt is not available for pending transactions.
¶ Parameters
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.from
:DATA
, 20 Bytes - address of the sender.to
:DATA
, 20 Bytes - address of the receiver. null when its a contract creation transaction.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, otherwisenull
.logs
:Array
- Array of log objects, which this transaction generated.logsBloom
:DATA
, 256 Bytes - Bloom filter for light clients to quickly retrieve related logs.
It also returns either :
root
:DATA
32 bytes of post-transaction stateroot (pre Byzantium)status
:QUANTITY
either1
(success) or0
(failure)
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_getTransactionReceipt","params":["0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238"],"id":1}'
// 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.
}, ...],
logsBloom: "0x00...0", // 256 byte bloom filter
status: '0x1'
}
}
¶ eth_getUncleByBlockHashAndIndex
Returns information about a uncle of a block by hash and uncle index position.
¶ Parameters
DATA
, 32 Bytes - The hash of a block.QUANTITY
- The uncle’s index position.
params: [
'0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b',
'0x0' // 0
]
¶ Returns
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_getUncleByBlockHashAndIndex","params":["0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b", "0x0"],"id":1}'
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
QUANTITY|TAG
- a block number, or the string"earliest"
,"latest"
or"pending"
, as in the default block parameter.QUANTITY
- the uncle’s index position.
params: [
'0x29c', // 668
'0x0' // 0
]
¶ Returns
Note: An uncle doesn’t contain individual transactions.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_getUncleByBlockNumberAndIndex","params":["0x29c", "0x0"],"id":1}'
Result see eth_getBlockByHash
¶ eth_getCompilers
Returns a list of available compilers in the client.
¶ Parameters
¶ Returns
Array
- Array of available compilers.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_getCompilers","params":[],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": ["solidity", "lll", "serpent"]
}
¶ eth_compileSolidity
Returns compiled solidity code.
¶ Parameters
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 -X POST --data '{"jsonrpc":"2.0","method":"eth_compileSolidity","params":["contract test { function multiply(uint a) returns(uint d) { return a * 7; } }"],"id":1}'
// 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
String
- The source code.
params: [
"(returnlll (suicide (caller)))",
]
¶ Returns
DATA
- The compiled source code.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_compileLLL","params":["(returnlll (suicide (caller)))"],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0x603880600c6000396000f3006001600060e060020a600035048063c6888fa114601857005b6021600435602b565b8060005260206000f35b600081600702905091905056" // the compiled source code
}
¶ eth_compileSerpent
Returns compiled serpent code.
¶ Parameters
String
- The source code.
params: [
"/* some serpent */",
]
¶ Returns
DATA
- The compiled source code.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_compileSerpent","params":["/* some serpent */"],"id":1}'
// 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
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 BytesDATA
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", "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"]]
}]
¶ Returns
QUANTITY
- A filter id.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_newFilter","params":[{"topics":["0x12341234"]}],"id":73}'
// 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
¶ Returns
QUANTITY
- A filter id.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_newBlockFilter","params":[],"id":73}'
// 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
¶ Returns
QUANTITY
- A filter id.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_newPendingTransactionFilter","params":[],"id":73}'
// 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
QUANTITY
- The filter id.
params: [
"0xb" // 11
]
¶ Returns
Boolean
- true
if the filter was successfully uninstalled, otherwise false
.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_uninstallFilter","params":["0xb"],"id":73}'
// 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
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:removed
:TAG
-true
when the log was removed, due to a chain reorganization.false
if its a valid log.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 BytesDATA
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 theanonymous
specifier.)
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_getFilterChanges","params":["0x16"],"id":73}'
// 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
QUANTITY
- The filter id.
params: [
"0x16" // 22
]
¶ Returns
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_getFilterLogs","params":["0x16"],"id":74}'
Result see eth_getFilterChanges
¶ eth_getLogs
Returns an array of all logs matching a given filter object.
¶ Parameters
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 BytesDATA
topics. Topics are order-dependent. Each topic can also be an array of DATA with “or” options.blockhash
:DATA
, 32 Bytes - (optional, future) With the addition of EIP-234,blockHash
will be a new filter option which restricts the logs returned to the single block with the 32-byte hashblockHash
. UsingblockHash
is equivalent tofromBlock
=toBlock
= the block number with hashblockHash
. IfblockHash
is present in in the filter criteria, then neitherfromBlock
nortoBlock
are allowed.
params: [{
"topics": ["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b"]
}]
¶ Returns
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_getLogs","params":[{"topics":["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b"]}],"id":74}'
Result see eth_getFilterChanges
¶ eth_getWork
Returns the hash of the current block, the seedHash, and the boundary condition to be met (“target”).
¶ Parameters
¶ Returns
Array
- Array with the following properties:
DATA
, 32 Bytes - current block header pow-hashDATA
, 32 Bytes - the seed hash used for the DAG.DATA
, 32 Bytes - the boundary condition (“target”), 2^256 / difficulty.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_getWork","params":[],"id":73}'
// Result
{
"id":1,
"jsonrpc":"2.0",
"result": [
"0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
"0x5EED00000000000000000000000000005EED0000000000000000000000000000",
"0xd1ff1c01710000000000000000000000d1ff1c01710000000000000000000000"
]
}
¶ eth_submitWork
Used for submitting a proof-of-work solution.
¶ Parameters
DATA
, 8 Bytes - The nonce found (64 bits)DATA
, 32 Bytes - The header’s pow-hash (256 bits)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 -X POST --data '{"jsonrpc":"2.0", "method":"eth_submitWork", "params":["0x0000000000000001", "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef", "0xD1GE5700000000000000000000000000D1GE5700000000000000000000000000"],"id":73}'
// Result
{
"id":73,
"jsonrpc":"2.0",
"result": true
}
¶ eth_submitHashrate
Used for submitting mining hashrate.
¶ Parameters
Hashrate
, a hexadecimal string representation (32 bytes) of the hash rateID
, 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 -X POST --data '{"jsonrpc":"2.0", "method":"eth_submitHashrate", "params":["0x0000000000000000000000000000000000000000000000000000000000500000", "0x59daa26581d0acd1fce254fb7e85952f4c09d0915afd33d3886cd914bc7d283c"],"id":73}'
// Result
{
"id":73,
"jsonrpc":"2.0",
"result": true
}
¶ db_putString
Stores a string in the local database.
Note this function is deprecated and will be removed in the future.
¶ Parameters
String
- Database name.String
- Key name.String
- String to store.
params: [
"testDB",
"myKey",
"myString"
]
¶ Returns
Boolean
- returns true
if the value was stored, otherwise false
.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"db_putString","params":["testDB","myKey","myString"],"id":73}'
// Result
{
"id":1,
"jsonrpc":"2.0",
"result": true
}
¶ db_getString
Returns string from the local database.
Note this function is deprecated and will be removed in the future.
¶ Parameters
String
- Database name.String
- Key name.
params: [
"testDB",
"myKey",
]
¶ Returns
String
- The previously stored string.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"db_getString","params":["testDB","myKey"],"id":73}'
// Result
{
"id":1,
"jsonrpc":"2.0",
"result": "myString"
}
¶ db_putHex
Stores binary data in the local database.
Note this function is deprecated and will be removed in the future.
¶ Parameters
String
- Database name.String
- Key name.DATA
- The data to store.
params: [
"testDB",
"myKey",
"0x68656c6c6f20776f726c64"
]
¶ Returns
Boolean
- returns true
if the value was stored, otherwise false
.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"db_putHex","params":["testDB","myKey","0x68656c6c6f20776f726c64"],"id":73}'
// Result
{
"id":1,
"jsonrpc":"2.0",
"result": true
}
¶ db_getHex
Returns binary data from the local database.
Note this function is deprecated and will be removed in the future.
¶ Parameters
String
- Database name.String
- Key name.
params: [
"testDB",
"myKey",
]
¶ Returns
DATA
- The previously stored data.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"db_getHex","params":["testDB","myKey"],"id":73}'
// Result
{
"id":1,
"jsonrpc":"2.0",
"result": "0x68656c6c6f20776f726c64"
}
¶ shh_version
Returns the current whisper protocol version.
¶ Parameters
¶ Returns
String
- The current whisper protocol version
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"shh_version","params":[],"id":67}'
// Result
{
"id":67,
"jsonrpc": "2.0",
"result": "2"
}
¶ shh_post
Sends a whisper message.
¶ Parameters
Object
- The whisper post object:
from
:DATA
, 60 Bytes - (optional) The identity of the sender.to
:DATA
, 60 Bytes - (optional) The identity of the receiver. When present whisper will encrypt the message so that only the receiver can decrypt it.topics
:Array of DATA
- Array ofDATA
topics, for the receiver to identify messages.payload
:DATA
- The payload of the message.priority
:QUANTITY
- The integer of the priority in a rang from … (?).ttl
:QUANTITY
- integer of the time to live in seconds.
params: [{
from: "0x04f96a5e25610293e42a73908e93ccc8c4d4dc0edcfa9fa872f50cb214e08ebf61a03e245533f97284d442460f2998cd41858798ddfd4d661997d3940272b717b1",
to: "0x3e245533f97284d442460f2998cd41858798ddf04f96a5e25610293e42a73908e93ccc8c4d4dc0edcfa9fa872f50cb214e08ebf61a0d4d661997d3940272b717b1",
topics: ["0x776869737065722d636861742d636c69656e74", "0x4d5a695276454c39425154466b61693532"],
payload: "0x7b2274797065223a226d6",
priority: "0x64",
ttl: "0x64",
}]
¶ Returns
Boolean
- returns true
if the message was send, otherwise false
.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"shh_post","params":[{"from":"0xc931d93e97ab07fe42d923478ba2465f2..","topics": ["0x68656c6c6f20776f726c64"],"payload":"0x68656c6c6f20776f726c64","ttl":0x64,"priority":0x64}],"id":73}'
// Result
{
"id":1,
"jsonrpc":"2.0",
"result": true
}
¶ shh_newIdentity
Creates new whisper identity in the client.
¶ Parameters
¶ Returns
DATA
, 60 Bytes - the address of the new identiy.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"shh_newIdentity","params":[],"id":73}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0xc931d93e97ab07fe42d923478ba2465f283f440fd6cabea4dd7a2c807108f651b7135d1d6ca9007d5b68aa497e4619ac10aa3b27726e1863c1fd9b570d99bbaf"
}
¶ shh_hasIdentity
Checks if the client hold the private keys for a given identity.
¶ Parameters
DATA
, 60 Bytes - The identity address to check.
params: [
"0x04f96a5e25610293e42a73908e93ccc8c4d4dc0edcfa9fa872f50cb214e08ebf61a03e245533f97284d442460f2998cd41858798ddfd4d661997d3940272b717b1"
]
¶ Returns
Boolean
- returns true
if the client holds the privatekey for that identity, otherwise false
.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"shh_hasIdentity","params":["0x04f96a5e25610293e42a73908e93ccc8c4d4dc0edcfa9fa872f50cb214e08ebf61a03e245533f97284d442460f2998cd41858798ddfd4d661997d3940272b717b1"],"id":73}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": true
}
¶ shh_newGroup
¶ Parameters
¶ Returns
DATA
, 60 Bytes - the address of the new group. (?)
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"shh_newGroup","params":[],"id":73}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0xc65f283f440fd6cabea4dd7a2c807108f651b7135d1d6ca90931d93e97ab07fe42d923478ba2407d5b68aa497e4619ac10aa3b27726e1863c1fd9b570d99bbaf"
}
¶ shh_addToGroup
¶ Parameters
DATA
, 60 Bytes - The identity address to add to a group (?).
params: [
"0x04f96a5e25610293e42a73908e93ccc8c4d4dc0edcfa9fa872f50cb214e08ebf61a03e245533f97284d442460f2998cd41858798ddfd4d661997d3940272b717b1"
]
¶ Returns
Boolean
- returns true
if the identity was successfully added to the group, otherwise false
(?).
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"shh_addToGroup","params":["0x04f96a5e25610293e42a73908e93ccc8c4d4dc0edcfa9fa872f50cb214e08ebf61a03e245533f97284d442460f2998cd41858798ddfd4d661997d3940272b717b1"],"id":73}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": true
}
¶ shh_newFilter
Creates filter to notify, when client receives whisper message matching the filter options.
¶ Parameters
Object
- The filter options:
to
:DATA
, 60 Bytes - (optional) Identity of the receiver. When present it will try to decrypt any incoming message if the client holds the private key to this identity.topics
:Array of DATA
- Array ofDATA
topics which the incoming message’s topics should match. You can use the following combinations:[A, B] = A && B
[A, [B, C]] = A && (B || C)
[null, A, B] = ANYTHING && A && B
null
works as a wildcard
params: [{
"topics": ['0x12341234bf4b564f'],
"to": "0x04f96a5e25610293e42a73908e93ccc8c4d4dc0edcfa9fa872f50cb214e08ebf61a03e245533f97284d442460f2998cd41858798ddfd4d661997d3940272b717b1"
}]
¶ Returns
QUANTITY
- The newly created filter.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"shh_newFilter","params":[{"topics": ['0x12341234bf4b564f'],"to": "0x2341234bf4b2341234bf4b564f..."}],"id":73}'
// Result
{
"id":1,
"jsonrpc":"2.0",
"result": "0x7" // 7
}
¶ shh_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 shh_getFilterChanges for a period of time.
¶ Parameters
QUANTITY
- The filter id.
params: [
"0x7" // 7
]
¶ Returns
Boolean
- true
if the filter was successfully uninstalled, otherwise false
.
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"shh_uninstallFilter","params":["0x7"],"id":73}'
// Result
{
"id":1,
"jsonrpc":"2.0",
"result": true
}
¶ shh_getFilterChanges
Polling method for whisper filters. Returns new messages since the last call of this method.
Note calling the shh_getMessages method, will reset the buffer for this method, so that you won’t receive duplicate messages.
¶ Parameters
QUANTITY
- The filter id.
params: [
"0x7" // 7
]
¶ Returns
Array
- Array of messages received since last poll:
hash
:DATA
, 32 Bytes (?) - The hash of the message.from
:DATA
, 60 Bytes - The sender of the message, if a sender was specified.to
:DATA
, 60 Bytes - The receiver of the message, if a receiver was specified.expiry
:QUANTITY
- Integer of the time in seconds when this message should expire (?).ttl
:QUANTITY
- Integer of the time the message should float in the system in seconds (?).sent
:QUANTITY
- Integer of the unix timestamp when the message was sent.topics
:Array of DATA
- Array ofDATA
topics the message contained.payload
:DATA
- The payload of the message.workProved
:QUANTITY
- Integer of the work this message required before it was send (?).
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"shh_getFilterChanges","params":["0x7"],"id":73}'
// Result
{
"id":1,
"jsonrpc":"2.0",
"result": [{
"hash": "0x33eb2da77bf3527e28f8bf493650b1879b08c4f2a362beae4ba2f71bafcd91f9",
"from": "0x3ec052fc33..",
"to": "0x87gdf76g8d7fgdfg...",
"expiry": "0x54caa50a", // 1422566666
"sent": "0x54ca9ea2", // 1422565026
"ttl": "0x64", // 100
"topics": ["0x6578616d"],
"payload": "0x7b2274797065223a226d657373616765222c2263686...",
"workProved": "0x0"
}]
}
¶ shh_getMessages
Get all messages matching a filter. Unlike shh_getFilterChanges
this returns all messages.
¶ Parameters
QUANTITY
- The filter id.
params: [
"0x7" // 7
]
¶ Returns
¶ Example
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"shh_getMessages","params":["0x7"],"id":73}'
Result see shh_getFilterChanges
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