**Contents**
For convenience, jump to [Truechain wiki](https://github.com/truechain/truechain-engineering-code/wiki/RPC-API)
- [JSON RPC API](#json-rpc-api)
- [JavaScript API](#javascript-api)
- [JSON-RPC Endpoint](#json-rpc-endpoint)
- [Go](#go)
- [JSON-RPC support](#json-rpc-support)
- [The default block parameter](#the-default-block-parameter)
- [Curl Examples Explained](#curl-examples-explained)
- [JSON-RPC methods](#json-rpc-methods)
- [JSON RPC API Reference](#json-rpc-api-reference)
- [web3_clientVersion](#web3_clientversion)
- [Parameters](#parameters)
- [Returns](#returns)
- [Example](#example)
- [web3_sha3](#web3_sha3)
- [Parameters](#parameters-1)
- [Returns](#returns-1)
- [Example](#example-1)
- [net_version](#net_version)
- [Parameters](#parameters-2)
- [Returns](#returns-2)
- [Example](#example-2)
- [net_listening](#net_listening)
- [Parameters](#parameters-3)
- [Returns](#returns-3)
- [Example](#example-3)
- [net_peerCount](#net_peercount)
- [Parameters](#parameters-4)
- [Returns](#returns-4)
- [Example](#example-4)
- [etrue_protocolVersion](#etrue_protocolversion)
- [Parameters](#parameters-5)
- [Returns](#returns-5)
- [Example](#example-5)
- [etrue_syncing](#etrue_syncing)
- [Parameters](#parameters-6)
- [Returns](#returns-6)
- [Example](#example-6)
- [etrue_coinbase](#etrue_coinbase)
- [Parameters](#parameters-7)
- [Returns](#returns-7)
- [Example](#example-7)
- [etrue_mining](#etrue_mining)
- [Parameters](#parameters-8)
- [Returns](#returns-8)
- [Example](#example-8)
- [etrue_hashrate](#etrue_hashrate)
- [Parameters](#parameters-9)
- [Returns](#returns-9)
- [Example](#example-9)
- [etrue_gasPrice](#etrue_gasprice)
- [Parameters](#parameters-10)
- [Returns](#returns-10)
- [Example](#example-10)
- [etrue_accounts](#etrue_accounts)
- [Parameters](#parameters-11)
- [Returns](#returns-11)
- [Example](#example-11)
- [etrue_blockNumber](#etrue_blocknumber)
- [Parameters](#parameters-12)
- [Returns](#returns-12)
- [Example](#example-12)
- [etrue_getBalance](#etrue_getbalance)
- [Parameters](#parameters-13)
- [Returns](#returns-13)
- [Example](#example-13)
- [etrue_getStorageAt](#etrue_getstorageat)
- [Parameters](#parameters-14)
- [Returns](#returns-14)
- [Example](#example-14)
- [etrue_getTransactionCount](#etrue_gettransactioncount)
- [Parameters](#parameters-15)
- [Returns](#returns-15)
- [Example](#example-15)
- [etrue_getBlockTransactionCountByHash](#etrue_getblocktransactioncountbyhash)
- [Parameters](#parameters-16)
- [Returns](#returns-16)
- [Example](#example-16)
- [etrue_getBlockTransactionCountByNumber](#etrue_getblocktransactioncountbynumber)
- [Parameters](#parameters-17)
- [Returns](#returns-17)
- [Example](#example-17)
- [etrue_getCode](#etrue_getcode)
- [Parameters](#parameters-18)
- [Returns](#returns-18)
- [Example](#example-18)
- [etrue_sign](#etrue_sign)
- [Parameters](#parameters-19)
- [Returns](#returns-19)
- [Example](#example-19)
- [etrue_sendTransaction](#etrue_sendtransaction)
- [Parameters](#parameters-20)
- [Returns](#returns-20)
- [Example](#example-20)
- [etrue_sendRawTransaction](#etrue_sendrawtransaction)
- [Parameters](#parameters-21)
- [Returns](#returns-21)
- [Example](#example-21)
- [etrue_call](#etrue_call)
- [Parameters](#parameters-22)
- [Returns](#returns-22)
- [Example](#example-22)
- [etrue_estimateGas](#etrue_estimategas)
- [Parameters](#parameters-23)
- [Returns](#returns-23)
- [Example](#example-23)
- [etrue_getBlockByHash](#etrue_getblockbyhash)
- [Parameters](#parameters-24)
- [Returns](#returns-24)
- [Example](#example-24)
- [etrue_getBlockByNumber](#etrue_getblockbynumber)
- [Parameters](#parameters-25)
- [Returns](#returns-25)
- [Example](#example-25)
- [etrue_getTransactionByHash](#etrue_gettransactionbyhash)
- [Parameters](#parameters-26)
- [Returns](#returns-26)
- [Example](#example-26)
- [etrue_getTransactionByBlockHashAndIndex](#etrue_gettransactionbyblockhashandindex)
- [Parameters](#parameters-27)
- [Returns](#returns-27)
- [Example](#example-27)
- [etrue_getTransactionByBlockNumberAndIndex](#etrue_gettransactionbyblocknumberandindex)
- [Parameters](#parameters-28)
- [Returns](#returns-28)
- [Example](#example-28)
- [etrue_getTransactionReceipt](#etrue_gettransactionreceipt)
- [Parameters](#parameters-29)
- [Returns](#returns-29)
- [Example](#example-29)
- [etrue_newFilter](#etrue_newfilter)
- [A note on specifying topic filters:](#a-note-on-specifying-topic-filters)
- [Parameters](#parameters-30)
- [Returns](#returns-30)
- [Example](#example-30)
- [etrue_newBlockFilter](#etrue_newblockfilter)
- [Parameters](#parameters-31)
- [Returns](#returns-31)
- [Example](#example-31)
- [etrue_newPendingTransactionFilter](#etrue_newpendingtransactionfilter)
- [Parameters](#parameters-32)
- [Returns](#returns-32)
- [Example](#example-32)
- [etrue_uninstallFilter](#etrue_uninstallfilter)
- [Parameters](#parameters-33)
- [Returns](#returns-33)
- [Example](#example-33)
- [etrue_getFilterChanges](#etrue_getfilterchanges)
- [Parameters](#parameters-34)
- [Returns](#returns-34)
- [Example](#example-34)
- [etrue_getFilterLogs](#etrue_getfilterlogs)
- [Parameters](#parameters-35)
- [Returns](#returns-35)
- [Example](#example-35)
- [etrue_getLogs](#etrue_getlogs)
- [Parameters](#parameters-36)
- [Returns](#returns-36)
- [Example](#example-36)
- [etrue_getWork](#etrue_getwork)
- [Parameters](#parameters-37)
- [Returns](#returns-37)
- [Example](#example-37)
- [etrue_submitWork](#etrue_submitwork)
- [Parameters](#parameters-38)
- [Returns](#returns-38)
- [Example](#example-38)
- [etrue_submitHashrate](#etrue_submithashrate)
- [Parameters](#parameters-39)
- [Returns](#returns-39)
- [Example](#example-39)
- [etrue_committeeNumber](#etrue_committeeNumber)
- [Parameters](#parameters-40)
- [Returns](#returns-40)
- [Example](#example-40)
- [etrue_fruitNumber](#etrue_fruitNumber)
- [Parameters](#parameters-41)
- [Returns](#returns-41)
- [Example](#example-41)
- [etrue_rewardSnailBlock](#etrue_rewardSnailBlock)
- [Parameters](#parameters-42)
- [Returns](#returns-42)
- [Example](#example-42)
- [etrue_snailBlockNumber](#etrue_snailBlockNumber)
- [Parameters](#parameters-43)
- [Returns](#returns-43)
- [Example](#example-43)
- [etrue_getCommittee](#etrue_getCommittee)
- [Parameters](#parameters-44)
- [Returns](#returns-44)
- [Example](#example-44)
- [etrue_getFruitByNumber](#etrue_getFruitByNumber)
- [Parameters](#parameters-45)
- [Returns](#returns-45)
- [Example](#example-45)
- [etrue_getFruitByHash](#etrue_getFruitByHash)
- [Parameters](#parameters-46)
- [Returns](#returns-46)
- [Example](#example-46)
- [etrue_getRewardBlock](#etrue_getRewardBlock)
- [Parameters](#parameters-47)
- [Returns](#returns-47)
- [Example](#example-47)
- [etrue_getSnailBlockByNumber](#etrue_getSnailBlockByNumber)
- [Parameters](#parameters-48)
- [Returns](#returns-48)
- [Example](#example-48)
- [etrue_getSnailBlockByHash](#etrue_getSnailBlockByHash)
- [Parameters](#parameters-49)
- [Returns](#returns-49)
- [Example](#example-49)
- [etrue_getDataset](#etrue_getDataset)
- [Parameters](#parameters-50)
- [Returns](#returns-50)
- [Example](#example-50)
- [etrue_getSnailRewardContent](#etrue_getSnailRewardContent)
- [Parameters](#parameters-51)
- [Returns](#returns-51)
- [Example](#example-51)
<!-- END doctoc generated TOC please keep comment here to allow auto update -->
# JSON RPC API
[JSON](http://json.org/) is a lightweight data-interchange format. It can represent numbers, strings, ordered sequences of values, and collections of name/value pairs.
[JSON-RPC](http://www.jsonrpc.org/specification) 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](http://www.ietf.org/rfc/rfc4627.txt)) as data format.
Getrue has experimental pub/sub support. See [this](https://github.com/truechain/truechain-engineering-code/wiki/RPC-PUB-SUB) page for more information.
## JavaScript API
To talk to an truechain node from inside a JavaScript application use the [web3.js](https://github.com/truechain/web3.js) library, which gives a convenient interface for the RPC methods.
## JSON-RPC Endpoint
Default JSON-RPC endpoints:
http://localhost:8545
### Go
You can start the HTTP JSON-RPC with the `--rpc` flag
```bash
getrue --rpc
```
change the default port (8545) and listing address (localhost) with:
```bash
getrue --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:
```bash
getrue --rpc --rpccorsdomain "http://localhost:3000"
```
## JSON-RPC support
JSON-RPC 2.0/ Batch requests/ HTTP/ IPC/ WS
## The default block parameter
The following methods have an extra default block parameter:
- [etrue_getBalance](#etrue_getbalance)
- [etrue_getCode](#etrue_getcode)
- [etrue_getTransactionCount](#etrue_gettransactioncount)
- [etrue_getStorageAt](#etrue_getstorageat)
- [etrue_call](#etrue_call)
When requests are made that act on the state of truechain, 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 number
- `String "earliest"` for the earliest/genesis block
- `String "latest"` - for the latest mined block
- `String "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
| [etrue](#etrue) | [eth](#eth) |[web3](#web3) |[net](#net) |
| :------------------: | :-----------------: |:-----------------: |:-----------------: |
| [protocolVersion](#etrue_protocolVersion)|[protocolVersion](#eth)|[clientVersion](#web3_clientVersion)|[version](#net_version)|
|[syncing](#etrue_sycning)|[syncing](#eth)|[sha3](#web3_sha3)| [peerCount](#net_peercount)|
|[coinbase](#etrue_coinbase)|[coinbase](#eth)||[listening](#net_listening)|
|[mining](#etrue_mining)|[mining](#eth)|
|[hashrate](#etrue_hashrate)|[hashrate](#eth)|
|[gasPrice](#etrue_gasPrice)|[gasPrice](#eth)|
|[accounts](#etrue_accounts)|[accounts](#eth)|
|[blockNumber](#etrue_blockNumber) |[blockNumber](#eth) |
|[getBalance](#etrue_getBalance)|[getBalance](#eth)|
|[getStorageAt](#etrue_getStorageAt)|[getStorageAt](#eth)|
| [getTransactionCount](#etrue_getTransactionCount)|[getTransactionCount](#eth)|
| [getBlockTransactionCountByHash](#etrue_getBlockTransactionCountByHash) |[getBlockTransactionCountByHash](#eth) |
| [getBlockTransactionCountByNumber](#etrue_getBlockTransactionCountByNumber) |[getBlockTransactionCountByNumber](#eth) |
| [getCode](#etrue_getCode) | [getCode](#eth) |
| [sign](#etrue_sign) | [sign](#eth) |
| [sendTransaction](#etrue_sendTransaction) | [sendTransaction](#eth) |
| [sendRawTransaction](#etrue_sendRawTransaction) |[sendRawTransaction](#eth) |
| [sendTrueRawTransaction](#etrue_sendTrueRawTransaction) | -|
| [call](#etrue_call) | [call](#eth) |
| [estimateGas](#etrue_estimateGas) | [estimateGas](#eth) |
| [getBlockByHash](#etrue_getblockbyhash) | [getBlockByHash](#eth)|
| [getBlockByNumber](#etrue_getblockbynumber) | [getBlockByNumber](#eth)|
|[getTransactionByHash](#etrue_gettransactionbyhash) | [getTransactionByHash](#eth)|
|[getTransactionByBlockHashAndIndex](#etrue_gettransactionbyblockhashandindex) | [getTransactionByBlockHashAndIndex](#eth)|
|[getTransactionByBlockNumberAndIndex](#etrue_gettransactionbyblocknumberandindex) | [getTransactionByBlockNumberAndIndex](#eth)|
| [getTransactionReceipt](#etrue_gettransactionreceipt) |[getTransactionReceipt](#eth) |
|[newFilter](#etrue_newfilter)|[newFilter](#eth)|
|[newBlockFilter](#etrue_newblockfilter)|[newBlockFilter](#eth)|
|[newPendingTransactionFilter](#etrue_newpendingtransactionfilter)|[newPendingTransactionFilter](#eth)|
|[uninstallFilter](#etrue_uninstallfilter)|[uninstallFilter](#eth)|
|[getFilterChanges](#etrue_getfilterchanges)|[getFilterChanges](#eth)|
|[getFilterLogs](#etrue_getfilterlogs)|[getFilterLogs](#eth)|
|[getLogs](#etrue_getlogs)|[getLogs](#eth)|
|[getWork](#etrue_getwork)|[getWork](#eth)|
|[submitWork](#etrue_submitwork)|[submitWork](#eth)|
|[submitHashrate](#etrue_submithashrate)|[submitHashrate](#eth)|
| [committeeNumber](#etrue_committeeNumber) |- |
| [fruitNumber](#etrue_fruitNumber) |- |
| [rewardSnailBlock](#etrue_rewardSnailBlock) |- |
| [snailBlockNumber](#etrue_snailBlockNumber) |- |
| [getCommittee](#etrue_getCommittee) | - |
| [getFruitByNumber](#etrue_getFruitByNumber) |-|
| [getFruitByHash](#etrue_getFruitByHash) |-|
| [getRewardBlock](#etrue_getRewardBlock) |- |
| [getSnailBlockByNumber](#etrue_getSnailBlockByNumber) | - |
| [getSnailBlockByHash](#etrue_getSnailBlockByHash) | - |
| [getDataset](#etrue_getDataset) | - |
| [getSnailRewardContent](#etrue_getSnailRewardContent) | - |
| |
## JSON RPC API Reference
***
## web3
#### web3_clientVersion
Returns the current client version.
##### Parameters
none
##### Returns
`String` - The current client version.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"web3_clientVersion","params":[],"id":67}'
// Result
{
"id":67,
"jsonrpc":"2.0",
"result": "Getrue/v1.1.0-unstable-d4c05e98/linux-amd64/go1.10"
}
```
***
#### web3_sha3
Returns Keccak-256 (*not* the standardized SHA3-256) of the given data.
##### Parameters
1. `DATA` - the data to convert into a SHA3 hash.
##### Example Parameters
```js
params: [
"0x68656c6c6f20776f726c64"
]
```
##### Returns
`DATA` - The SHA3 result of the given string.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"web3_sha3","params":["0x68656c6c6f20776f726c64"],"id":64}'
// Result
{
"id":64,
"jsonrpc": "2.0",
"result": "0x47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad"
}
```
***
## net
#### net_version
Returns the current network id.
##### Parameters
none
##### Returns
`String` - The current network id.
- `"19330"`: Truechain Mainnet
- `"18928"`: Testnet
- `"100"`: Devnet
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"net_version","params":[],"id":67}'
// Result
{
"id":67,
"jsonrpc": "2.0",
"result": "19330"
}
```
***
#### net_listening
Returns `true` if client is actively listening for network connections.
##### Parameters
none
##### Returns
`Boolean` - `true` when listening, otherwise `false`.
##### Example
```js
// 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
none
##### Returns
`QUANTITY` - integer of the number of connected peers.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"net_peerCount","params":[],"id":74}'
// Result
{
"id":74,
"jsonrpc": "2.0",
"result": "0x2" // 2
}
```
***
## Etrue
#### etrue_protocolVersion
Returns the current truechain protocol version.
##### Parameters
none
##### Returns
`String` - The current truechain protocol version.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_protocolVersion","params":[],"id":67}'
// Result
{
"id":67,
"jsonrpc": "2.0",
"result": "0x40"
}
```
***
#### etrue_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:
- `currentFastBlock`: `QUANTITY` -current block number(fastchain)
- `currentSnailBlock`: `QUANTITY` -current block number(snailchain)
- `highestFastBlock`: `QUANTITY` - already highest block number(fastchain)
- `highestSnailBlock`: `QUANTITY` -already highest block number(snailchain)
- `knownStates`: `String` -already know state
- `pulledStates`: `String` -already complete state
- `startingFastBlock`: `QUANTITY` -start sync block number(fastchain)
- `startingSnailBlock`: `QUANTITY` -start sync block number(snailchain)
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_syncing","params":[],"id":1}'
// Result
{
"jsonrpc": "2.0",
"id": 1,
"result": {
"currentFastBlock": "0x2e9a",
"currentSnailBlock": "0xab",
"highestFastBlock": "0x3a3d2",
"highestSnailBlock": "0xab7",
"knownStates": "0x0",
"pulledStates": "0x0",
"startingFastBlock": "0x2e98",
"startingSnailBlock": "0x0"
}
}
// Or when not syncing
{
"id":1,
"jsonrpc": "2.0",
"result": false
}
```
***
#### etrue_coinbase
Returns the client coinbase address.
##### Parameters
none
##### Returns
`DATA`, 20 bytes - the current coinbase address.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_coinbase","params":[],"id":64}'
// Result
{
"id":64,
"jsonrpc": "2.0",
"result": "0xc94770007dda54cF92009BFF0dE90c06F603a09f"
}
```
***
#### etrue_mining
Returns `true` if client is actively mining new blocks.
##### Parameters
none
##### Returns
`Boolean` - returns `true` of the client is mining, otherwise `false`.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_mining","params":[],"id":71}'
// Result
{
"id":71,
"jsonrpc": "2.0",
"result": true
}
```
***
#### etrue_hashrate
Returns the number of hashes per second that the node is mining with.
##### Parameters
none
##### Returns
`QUANTITY` - number of hashes per second.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_hashrate","params":[],"id":71}'
// Result
{
"id":71,
"jsonrpc": "2.0",
"result": "0x38a"
}
```
***
#### etrue_gasPrice
Returns the current price per gas in wei.
##### Parameters
none
##### Returns
`QUANTITY` - integer of the current gas price in wei.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_gasPrice","params":[],"id":73}'
// Result
{
"id":73,
"jsonrpc": "2.0",
"result": "0xf4240" // 1000000
}
```
***
#### etrue_accounts
Returns a list of addresses owned by client.
##### Parameters
none
##### Returns
`Array of DATA`, 20 Bytes - addresses owned by the client.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_accounts","params":[],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": ["0xc94770007dda54cF92009BFF0dE90c06F603a09f"]
}
```
***
#### etrue_blockNumber
Returns the number of most recent block.
##### Parameters
none
##### Returns
`QUANTITY` - integer of the current block number the client is on.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_blockNumber","params":[],"id":1}'
// Result
{
"id":83,
"jsonrpc": "2.0",
"result": "0xc94" // 1207
}
```
***
#### etrue_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](#the-default-block-parameter)
##### Example Parameters
```js
params: [
'0xc94770007dda54cF92009BFF0dE90c06F603a09f',
'latest'
]
```
##### Returns
`QUANTITY` - integer of the current balance in wei.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_getBalance","params":["0xc94770007dda54cF92009BFF0dE90c06F603a09f", "latest"],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0x0234c8a3397aab58" // 158972490234375000
}
```
***
#### etrue_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](#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:
```js
curl -X POST --data '{"jsonrpc":"2.0", "method": "etrue_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:
```js
keccack(LeftPad32(key, 0), LeftPad32(map position, 0))
```
This means to retrieve the storage on pos1["0x391694e7e0b0cce554cb130d723a9d27458f9298"] we need to calculate the position with:
```js
keccak(decodeHex("000000000000000000000000391694e7e0b0cce554cb130d723a9d27458f9298" + "0000000000000000000000000000000000000000000000000000000000000001"))
```
The getrue console which comes with the web3 library can be used to make the calculation:
```js
> var key = "000000000000000000000000391694e7e0b0cce554cb130d723a9d27458f9298" + "0000000000000000000000000000000000000000000000000000000000000001"
undefined
> web3.sha3(key, {"encoding": "hex"})
"0x6661e9d6d8b923d5bbaab1b96e1dd51ff6ea2a93520fdc9eb75d059238b8c5e9"
```
Now to fetch the storage:
```js
curl -X POST --data '{"jsonrpc":"2.0", "method": "etrue_getStorageAt", "params": ["0x295a70b2de5e3953354a6a8344e616ed314d7251", "0x6661e9d6d8b923d5bbaab1b96e1dd51ff6ea2a93520fdc9eb75d059238b8c5e9", "latest"], "id": 1}' localhost:8545
{"jsonrpc":"2.0","id":1,"result":"0x000000000000000000000000000000000000000000000000000000000000162e"}
```
***
#### etrue_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](#the-default-block-parameter)
##### Example Parameters
```js
params: [
'0xc94770007dda54cF92009BFF0dE90c06F603a09f',
'latest' // state at the latest block
]
```
##### Returns
`QUANTITY` - integer of the number of transactions send from this address.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_getTransactionCount","params":["0xc94770007dda54cF92009BFF0dE90c06F603a09f","latest"],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0x1" // 1
}
```
***
#### etrue_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.
##### Example Parameters
```js
params: [
'0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238'
]
```
##### Returns
`QUANTITY` - integer of the number of transactions in this block.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_getBlockTransactionCountByHash","params":["0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238"],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0xc" // 11
}
```
***
#### etrue_getBlockTransactionCountByNumber
> >
Returns the number of transactions in 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](#the-default-block-parameter).
##### Example Parameters
```js
params: [
'0xe8', // 232
]
```
##### Returns
`QUANTITY` - integer of the number of transactions in this block.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_getBlockTransactionCountByNumber","params":["0xe8"],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0xa" // 10
}
```
***
#### etrue_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](#the-default-block-parameter).
##### Example Parameters
```js
params: [
'0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b',
'0x2' // 2
]
```
##### Returns
`DATA` - the code from the given address.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_getCode","params":["0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b", "0x2"],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0x600160008035811a818181146012578301005b601b6001356025565b8060005260206000f25b600060078202905091905056"
}
```
***
#### etrue_sign
The sign method calculates an Truechain specific signature with: `sign(keccak256("\x19Truechain Signed Message:\n" + len(message) + message)))`.
By adding a prefix to the message makes the calculated signature recognisable as an Truechain 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
1. `DATA`, 20 Bytes - address.
2. `DATA`, N Bytes - message to sign.
##### Returns
`DATA`: Signature
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_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 `etrue_sign` can be found [here](https://gist.github.com/bas-vk/d46d83da2b2b4721efb0907aecdb7ebd). The contract is deployed on the testnet Ropsten and Rinkeby.
***
#### etrue_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 sent with this transaction
- `data`: `DATA` - The compiled code of a contract OR the hash of the invoked method signature and encoded parameters.
- `nonce`: `QUANTITY` - (optional) Integer of a nonce. This allows to overwrite your own pending transactions that use the same nonce.
##### Example Parameters
```js
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 [etrue_getTransactionReceipt](#etrue_gettransactionreceipt) to get the contract address, after the transaction was mined, when you created a contract.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_sendTransaction","params":[{see above}],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331"
}
```
***
#### etrue_sendRawTransaction
Creates new message call transaction or a contract creation for signed transactions.
##### Parameters
1. `DATA`, The signed transaction data.
##### Example Parameters
```js
params: ["0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"]
```
##### Returns
`DATA`, 32 Bytes - the transaction hash, or the zero hash if the transaction is not yet available.
Use [etrue_getTransactionReceipt](#etrue_gettransactionreceipt) to get the contract address, after the transaction was mined, when you created a contract.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_sendRawTransaction","params":[{see above}],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331"
}
```
***
#### etrue_sendTrueRawTransaction
When transaction contain payer or fee,Creates new message call transaction or a contract creation for signed transactions.
##### Parameters
1. `DATA`, The signed transaction data.
##### Example Parameters
```js
params: ["0xf8c60183989680834c4b4094bea78fea68dba84363d0f9b79219ddf5991ccb2a880de0b6b3a76400008094cfb7ec3ac64a3afde043a5b32212d0b9c25b5d808081eba07cc4b8300a8ab6a7d6aee713f6dc61311848bf827794c370873ca334e7cc2cc1a05cd365ffc46cada820911e3c11123e36245ed1cec7943038632715a89a421b0281eca037d6e60016bd70371fd45a2fadd63f8824b34331f2cb5f7fe69f04df7f6d9caea04e05dda8cffa3e453aa474f955eef97fe63e9c9721860aaea379a0ace111fd16"]
```
##### Returns
`DATA`, 32 Bytes - the transaction hash, or the zero hash if the transaction is not yet available.
Use [etrue_getTransactionReceipt](#etrue_gettransactionreceipt) to get the contract address, after the transaction was mined, when you created a contract.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_sendTrueRawTransaction","params":[{see above}],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0xc7509ef7672e1c1d59cec2854d3d074d442984382bd03c665c2e82ebfdacc25e"
}
```
***
#### etrue_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 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. etrue_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 sent with this transaction
- `data`: `DATA` - (optional) Hash of the method signature and encoded parameters
2. `QUANTITY|TAG` - integer block number, or the string `"latest"`, `"earliest"` or `"pending"`, see the [default block parameter](#the-default-block-parameter)
##### Returns
`DATA` - the return value of executed contract.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_call","params":[{see etrue_sendTransaction parameter}],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0x"
}
```
***
#### etrue_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 [etrue_call](#etrue_call) parameters, expect that all properties are optional. If no gas limit is specified getrue 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
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_estimateGas","params":[{see etrue_sendTransaction parameter}],"id":1}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0x5208" // 21000
}
```
***
#### etrue_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.
##### Example Parameters
```js
params: [
'0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331',
true
]
```
##### Returns
`Object` - A block object, or `null` when no block was found:
- `SnailHash`: `DATA`, 32 Bytes - hash of the snail block.
- `SnailNumber`: `QUANTITY`- the snail block number.
- `committeeRoot`: `DATA`, 32 Bytes - hash of the committtee.
- `extraData`: `DATA` - the "extra data" field of this block.
- `gasLimit`: `QUANTITY` - the maximum gas allowed in this block.
- `gasUsed`: `QUANTITY` - the total used gas by all transactions in this block.
- `hash`: `DATA`, 32 Bytes - hash of the block. `null` when its pending block.
- `logsBloom`: `DATA`, 256 Bytes - the bloom filter for the logs of the block. `null` when its pending block.
- `maker`: `DATA`, 20 Bytes - the address of the beneficiary to whom the mining rewards were given.
- `number`: `QUANTITY` - the block number. `null` when its pending block.
- `parentHash`: `DATA`, 32 Bytes - hash of the parent block.
- `receiptsRoot`: `DATA`, 32 Bytes - the root of the receipts trie of the block.
- `signs`: `Array`, committee signs.
- `fastHash`: `DATA`, 32 Bytes - hash of the fast block.
- `fastHeight`: `QUANTITY`- the fast block number.
- `result`: `QUANTITY`- the vote.
- `sign`: `DATA`, 32 Bytes - committee sign hash.
- `size`: `QUANTITY` - integer the size of this block in bytes.
- `stateRoot`: `DATA`, 32 Bytes - the root of the final state trie of the block.
- `switchInfos`: `Array`, committee member switch.
- `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.
- `transactionsRoot`: `DATA`, 32 Bytes - the root of the transaction trie of the block.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_getBlockByHash","params":["0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d15273312", true],"id":1}'
// Result
{
"id":1,
"jsonrpc":"2.0",
"result": {
{"SnailHash":"0x0000000000000000000000000000000000000000000000000000000000000000",
"SnailNumber":"0x0",
"committeeRoot":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
"extraData":"0x",
"gasLimit":"0xb71b00","gasUsed":"0x0",
"hash":"0xd58570f394347e6b73c4beeabfb75f8b4a6c6f08c71f159a233309365836e3d2",
"logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
"maker":"0x49fc88c2576b4f015cf75dae80e87a815d832888",
"number":"0xab4",
"parentHash":"0x0832d972f5b16ddefc3de154cc0a5a4ea16be2991be19bd740ae3486a83ff59f",
"receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
"signs":[{"fastHash":"0xd58570f394347e6b73c4beeabfb75f8b4a6c6f08c71f159a233309365836e3d2",
"fastHeight":"0xab4","result":1,
"sign":"0x7a07be32cce585b6d74e6134022c973b6433dcb87447ec456712f5d3b40b8907403ea24c81309aa090e7469fc761372de2e2d32beddf0031eed1aa557185cbc101"},
{"fastHash":"0xd58570f394347e6b73c4beeabfb75f8b4a6c6f08c71f159a233309365836e3d2","fastHeight":"0xab4","result":1,"sign":"0x4f1033692e2f354409002ff0ce9eb20d4edb676f6c02dc58223c9d2d15eebcaf4071c2efc630a44d78865da714ae694cd690d4b0d02b393d64ca377c63594a6e01"},{"fastHash":"0xd58570f394347e6b73c4beeabfb75f8b4a6c6f08c71f159a233309365836e3d2","fastHeight":"0xab4","result":1,"sign":"0xc8303a5c76fb70e834b63e70180af9720ac09eda59327a0e6be3ab85fcfcbb9b40434ae7dcd23df13fe6a55c1967d29de7db5c5e545674b6849a1a4eabb59b4b00"},
{"fastHash":"0xd58570f394347e6b73c4beeabfb75f8b4a6c6f08c71f159a233309365836e3d2","fastHeight":"0xab4","result":1,"sign":"0x041df0a05407cb302695babfeff03d669d300e76cc2d33305512dc0859aeb4dc47b68065b5d62bd88a6b60e3993ed07ae0a64223681084c5c958cdd2041f42a100"},
{"fastHash":"0xd58570f394347e6b73c4beeabfb75f8b4a6c6f08c71f159a233309365836e3d2","fastHeight":"0xab4","result":1,"sign":"0x8b8c97a4155c2b687b0eb90e1a716ede85c1b32ec7b164c0fa721f1b18ada4c41bc46373419d625ef8f0368b123bf86a60b07c168ebb5b97de4b9095847fad5001"}],"size":"0x40a","stateRoot":"0x5c7127948504801c7db0ef17df87950b471a94d6f5332d39ceff41298f3f6b74",
"switchInfos":[],"timestamp":"0x5ce25206","transactions":[],
"transactionsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"}
}
}
```
***
#### etrue_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](#the-default-block-parameter).
2. `Boolean` - If `true` it returns the full transaction objects, if `false` only the hashes of the transactions.
##### Example Parameters
```js
params: [
'0x1b4', // 436
true
]
```
##### Returns
See [etrue_getBlockByHash](#etrue_getblockbyhash)
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_getBlockByNumber","params":["0x1b4", true],"id":1}'
```
Result see [etrue_getBlockByHash](#etrue_getblockbyhash)
***
#### etrue_getTransactionByHash
Returns the information about a transaction requested by transaction hash.
##### Parameters
1. `DATA`, 32 Bytes - hash of a transaction
##### Example Parameters
```js
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 transaction's index position in the block. `null` when its pending.
- `value`: `QUANTITY` - value transferred in Wei.
- `v`: `QUANTITY` - ECDSA recovery id
- `r`: `DATA`, 32 Bytes - ECDSA signature r
- `s`: `DATA`, 32 Bytes - ECDSA signature s
- `payer`: `DATA`, 20 Bytes - address of the payer.
- `fee`: `QUANTITY` - transaction fee in Wei.
- `pv`: `QUANTITY` - ECDSA recovery id
- `pr`: `DATA`, 32 Bytes - ECDSA signature pr
- `ps`: `DATA`, 32 Bytes - ECDSA signature ps
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_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"
"payer":null,
"fee":null,
"pv":null,
"pr":null,
"ps":null
}
}
```
***
#### etrue_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.
##### Example Parameters
```js
params: [
'0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331',
'0x0' // 0
]
```
##### Returns
See [etrue_getTransactionByHash](#etrue_gettransactionbyhash)
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_getTransactionByBlockHashAndIndex","params":["0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b", "0x0"],"id":1}'
```
Result see [etrue_getTransactionByHash](#etrue_gettransactionbyhash)
***
#### etrue_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](#the-default-block-parameter).
2. `QUANTITY` - the transaction index position.
##### Example Parameters
```js
params: [
'0x29c', // 668
'0x0' // 0
]
```
##### Returns
See [etrue_getTransactionByHash](#etrue_gettransactionbyhash)
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_getTransactionByBlockNumberAndIndex","params":["0x29c", "0x0"],"id":1}'
```
Result see [etrue_getTransactionByHash](#etrue_gettransactionbyhash)
***
#### etrue_getTransactionReceipt
Returns the receipt of a transaction by transaction hash.
**Note** That the receipt is not available for pending transactions.
##### Parameters
1. `DATA`, 32 Bytes - hash of a transaction
##### Example Parameters
```js
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 transaction's 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 it's 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, otherwise `null`.
- `to`: `DATA`, 20 Bytes - The address the transaction is directed to.
- `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` either `1` (success) or `0` (failure)
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_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'
}
}
```
***
#### etrue_newFilter
Creates a filter object, based on filter options, to notify when the state changes (logs).
To check if the state has changed, call [etrue_getFilterChanges](#etrue_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.
##### Example Parameters
```js
params: [{
"fromBlock": "0x1",
"toBlock": "0x2",
"address": "0x8888f1f195afa192cfee860698584c030f4c9db1",
"topics": ["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b", null, ["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b", "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"]]
}]
```
##### Returns
`QUANTITY` - A filter id.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_newFilter","params":[{"topics":["0x0000000000000000000000000000000000000000000000000000000012341234"]}],"id":73}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0x1" // 1
}
```
***
#### etrue_newBlockFilter
Creates a filter in the node, to notify when a new block arrives.
To check if the state has changed, call [etrue_getFilterChanges](#etrue_getfilterchanges).
##### Parameters
None
##### Returns
`QUANTITY` - A filter id.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_newBlockFilter","params":[],"id":73}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0x1" // 1
}
```
***
#### etrue_newPendingTransactionFilter
Creates a filter in the node, to notify when new pending transactions arrive.
To check if the state has changed, call [etrue_getFilterChanges](#etrue_getfilterchanges).
##### Parameters
None
##### Returns
`QUANTITY` - A filter id.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_newPendingTransactionFilter","params":[],"id":73}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": "0x1" // 1
}
```
***
#### etrue_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 [etrue_getFilterChanges](#etrue_getfilterchanges) for a period of time.
##### Parameters
1. `QUANTITY` - The filter id.
##### Example Parameters
```js
params: [
"0xb" // 11
]
```
##### Returns
`Boolean` - `true` if the filter was successfully uninstalled, otherwise `false`.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_uninstallFilter","params":["0xb"],"id":73}'
// Result
{
"id":1,
"jsonrpc": "2.0",
"result": true
}
```
***
#### etrue_getFilterChanges
Polling method for a filter, which returns an array of logs which occurred since last poll.
##### Parameters
1. `QUANTITY` - the filter id.
##### Example Parameters
```js
params: [
"0x16" // 22
]
```
##### Returns
`Array` - Array of log objects, or an empty array if nothing has changed since last poll.
- For filters created with `etrue_newBlockFilter` the return are block hashes (`DATA`, 32 Bytes), e.g. `["0x3454645634534..."]`.
- For filters created with `etrue_newPendingTransactionFilter ` the return are transaction hashes (`DATA`, 32 Bytes), e.g. `["0x6345343454645..."]`.
- For filters created with `etrue_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 the 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
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_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"]
},{
...
}]
}
```
***
#### etrue_getFilterLogs
Returns an array of all logs matching filter with given id.
##### Parameters
1. `QUANTITY` - The filter id.
##### Example Parameters
```js
params: [
"0x16" // 22
]
```
##### Returns
See [etrue_getFilterChanges](#etrue_getfilterchanges)
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_getFilterLogs","params":["0x16"],"id":74}'
```
Result see [etrue_getFilterChanges](#etrue_getfilterchanges)
***
#### etrue_getLogs
Returns an array of all logs matching a given filter object.
##### 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.
- `blockhash`: `DATA`, 32 Bytes - (optional) With the addition of EIP-234 (Getrue >= v1.8.13 or Parity >= v2.1.0), `blockHash` is a new filter option which restricts the logs returned to the single block with the 32-byte hash `blockHash`. Using `blockHash` is equivalent to `fromBlock` = `toBlock` = the block number with hash `blockHash`. If `blockHash` is present in the filter criteria, then neither `fromBlock` nor `toBlock` are allowed.
##### Example Parameters
```js
params: [{
"topics": ["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b"]
}]
```
##### Returns
See [etrue_getFilterChanges](#etrue_getfilterchanges)
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_getLogs","params":[{"topics":["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b"]}],"id":74}'
```
Result see [etrue_getFilterChanges](#etrue_getfilterchanges)
***
#### etrue_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 snailBlock header without nonce
2. `DATA`, 32 Bytes - the seed hash used for the DAG.
3. `DATA`, 32 Bytes - the boundary condition ("target"), 2^256 / fruit difficulty.
4. `DATA`, 32 Bytes - the boundary condition ("target"), 2^256 / snailBlock difficulty.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"etrue_getWork","params":[],"id":73}'
// Result
{
"jsonrpc": "2.0",
"id": 73,
"result": ["0xbcdcb8533dcf88b736f5b44f777250922f0f0472d4dd34a5a1b445a0c47aceed", "58bc067579760d307143ec1cd416eb3814110d29bf21aba0cd18586e2f038791", "0x0000000000000000000000000000000000000000000000000000000000000064", "0x0000000000000000000000000000000000000000000000000000000000002710"]
}
```
***
#### etrue_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)
##### Example Parameters
```js
params: [
"0x0000000000000001",
"0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
"0xD1FE5700000000000000000000000000D1FE5700000000000000000000000000"
]
```
##### Returns
`Boolean` - returns `true` if the provided solution is valid, otherwise `false`.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0", "method":"etrue_submitWork", "params":["0x0000000000000001", "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef", "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef"],"id":73}'
// Result
{
"id":73,
"jsonrpc":"2.0",
"result": true
}
```
***
#### etrue_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
##### Example Parameters
```js
params: [
"0x500000",
"0x59daa26581d0acd1fce254fb7e85952f4c09d0915afd33d3886cd914bc7d283c"
]
```
##### Returns
`Boolean` - returns `true` if submitting went through succesfully and `false` otherwise.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0", "method":"etrue_submitHashrate", "params":["0x500000", "0x59daa26581d0acd1fce254fb7e85952f4c09d0915afd33d3886cd914bc7d283c"],"id":73}'
// Result
{
"id":73,
"jsonrpc":"2.0",
"result": true
}
```
***
#### etrue_committeeNumber
get current committee number
##### Parameters
none
##### Returns
QUANTITY - integer of the current committee number.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0", "method":"etrue_committeeNumber", "params":[],"id":100}'
// Result
{
"jsonrpc": "2.0",
"id": 100,
"result": 8
}
```
***
#### etrue_fruitNumber
get current fruit number
##### Parameters
none
##### Returns
QUANTITY - integer of the current fruit number.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0", "method":"etrue_fruitNumber", "params":[],"id":100}'
// Result
{
"jsonrpc": "2.0",
"id": 100,
"result": "0x1975f"
}
```
***
#### etrue_rewardSnailBlock
get current reward snalBlock infomation
##### Parameters
none
##### Returns
`Object` - A snail block object, or `null` when no snail reward block was found:
- `beginFruitNumber`: `QUANTITY` - the beign fruit number in snail reward block.
- `difficulty`: `QUANTITY` - integer of the difficulty for this snail reward block.
- `endFruitNumber`: `QUANTITY` - the end fruit number in snail reward block.
- `extraData`: `DATA` - the "extra data" field of this reward block.
- `fastNumber`: `QUANTITY` - default 0.
- `fruitDifficulty`: `QUANTITY` - integer of all fruit difficulty for this snail reward block.
- `fruitsHash`: `DATA`, 32 Bytes - hash of fruits in snail reward block.
- `fruits`: `Array` - Array of all hash of fruits in snail reward block.
- `hash`: `DATA`, 32 Bytes - hash of the snail reward block.
- `miner`: `DATA`, 20 Bytes - the address of the beneficiary to whom the mining rewards were given.
- `mixHash`: `DATA`, 32 Bytes - the mix digest.
- `nonce`: `QUANTITY` - the mining nonce.
- `number`: `QUANTITY` - the snail reward number.
- `parentHash`: `DATA`, 32 Bytes - hash of the parent block.
- `pointerNumber`: `QUANTITY` - current snail reward block minus 7.
- `size`: `QUANTITY` - integer the size of this reward block in bytes.
- `timestamp`: `QUANTITY` - the unix timestamp for when the block was collated.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0", "method":"etrue_rewardSnailBlock", "params":[],"id":100}'
// Result
{
"jsonrpc": "2.0",
"id": 100,
"result": {
"beginFruitNumber": "0x193a0",
"difficulty": "0x2710",
"endFruitNumber": "0x193db",
"extraData": "0xd9820a018667657472756588676f312e31302e38856c696e7578",
"fastNumber": 0,
"fruitDifficulty": "0x64",
"fruitsHash": "0x7dad8df99080412919a4e0018c980e6bf40e64bff5e09f0ec45efd63530ed95e",
"fruits": ["0x421cf9aa22145c141d3235a5b19c73d10613cc782221f279c3a136f136ac811e", "0xb6fdad4a0287102adba3b5bbe9789598694c028491de7c459f47248ee1844132", "0xa784a38af019ea321c725bf6b6ed61398bb86d4b20289c0a6ef54a20eced554c", "0x8fe6337b88ee4f19514670d49f5a64e736edfd7ae8c34fecc6d54ce923325991", "0x9dcbc81a1e764f6c0a6591e72000776dad6752be2d9c65b77a2157bc88a65333", "0x5cbac30e3a8d3246bbb84b570aecfa69b1d364738e4223fa17fe047b307ed7f2", "0x75115e8cdcfba043c57c2a10c6e781ab582f85b2e715cbacc42e3d2f96bc7cac", "0x08fe101b8ef2304965b5008267ee321ddbc48b1fd210b4dff81441e9c57f2e0f", "0xe31577b98c384074b37ad1d9cad88d31483b152ed96106e17f9864ded8052f62", "0xce3f340eb5c0582e82f5f9c550373ba069af140b50eabaf7a044717eada32536", "0x879f73afc3cb734dd9b5b7fe7687b6f8d6a5b8e7d20c4f730dbd0f84590ac0de", "0xd0c3c2c31f6b19c618c709968624ca02b23341b01178f9de23b43a406755c93e", "0xaa1285332874bd67c7b37b7b81f66e0b3fe6b38b176d22a0ee0349ef3120f9c4", "0xaed6ff91f2f1de5fcd7880797b841c61458bd59fe3f4bd4e80823d99a555049f", "0x46e8303c548f82e59741ee94ced70a0df1500abef9d667f131a39e71b9aaff0c", "0xedc6d3a94624bd914435119493c5d73545c854385758e86cb1b2c6445de7a6d4", "0x46a42a82461c5b92ef7ecf86c6d84dd8a7abeddd72a444467c109da53de26f10", "0xf23a03a1698426280449512bf19f731c56051cd19d04976009d7d2e03d6294a4", "0x4f2b30f026d64d56ec8d0fc69ef0959bbceeff648eafe8ff3c711af4d0f796eb", "0xbcfd45ccd7456fdb5dc3d19a2bd65f4b37530e4772fb6a6364376df3dee8b883", "0x3c1ce1153fc784870812be53f89c549063c5056d653db16621232582b6fe51f7", "0x8dfbb789f49ff07237c5650fa166d7adf9a2ff5b0ee967e510686a0df24b5e6e", "0x06aef81bc2b5d914fc553dad79a83dc0660c33c75448e62129b1da8443a3e704", "0xf291e642625bf18ddc03eb2c6287dea900457bcf8102834c26fb08438eb5d434", "0x73bb8bc367a789ce6e69ef4e21ffec76e103d36a85a01a460bd268a1ceec992a", "0x364c55068a8341db5e3ecc6fa6cc328e1b038d9a567b85fb3e470d8ee12a2fd8", "0x460e5ddc879c9da6090296d04fc522fcfc4341566856c0e4b81a6ee459922c06", "0x0f17e693874809172d889bd813ed4e825fdc4436d4c97bc48725b924ab612ce5", "0xca07ab5afbdc766247276e3641df8206cc89ca00660f3d72ceac86b1e192652a", "0x96027060b71fb9b758131b70c481c2e5f916bb821fa7295a834080c89698dbe1", "0xb9ed69d03aa2a80e358950b82fbd083fbef5069b6b8f2488cd74d70260b5de9b", "0x71c0249266f922677eab708b5de86fe1f057b6b39ad6dcd05230de89a0021eba", "0xbcb6f37b63558db10bedab0f722e34341a6329f57248e00606fe184613468c5c", "0x08eb945b49599aa7903bac856f5f5bb9d260bc1c2c553b2ab9d69a8611c4c935", "0xcac5bb4daec7f138cb820e5fd4b958184c9e724d4879662f4422df0230aadb14", "0xd29c761ec3504ae091998c2acbc3e739635d99e0764a7f521021a8ae7c068c36", "0xe5de172346d9d1f423a09726ca6e992725986c54bf2818ba537d341ba63ebf19", "0x337f7834016004bfa59869cfc357035dbc8128b340ed062e7a30a93bee2ac3fb", "0xf0f6790614751991e9d04548c7a81b0ef28aff686a704e4cfbfe1de01e6fce9e", "0x502e04348f225907f8528d9196c7113bd3c15d3080c1c1718c85c8cc073ea7bb", "0x663bf65f7e766082cfb84ab2d9303f9c078e2819eb2197d6f6318dafc55cfa98", "0x282b563050f940059986b4745345f14ce6d7e96b7160ead7a27985ce99aeae9b", "0x1459d9bb5939fe563d6d9502e28184d5c4619c10d0e0f6699b746daf4c1b0400", "0xc7d3fff73e954042d5bd91107252ff3986c9c756869c0484954d82831dfbfb28", "0x0cb9e8929bf625b0916879359fc617ce0b4e7f474df5cf53414d2075e8668cca", "0x9b8715bf3090fdf115ae675bf4692e5dc3e8453b126fd729ddfabbfaed11aa66", "0x69668b51d76ce1ab186158f05ef8d92394803b9f0c3e508d18d39fe45f2e25d4", "0x972f4e2f865c5e00f377418a2a0469e3abd3c1b64b2cdd803904dd33a9bfc7a0", "0x3ccb10a6a69fcfe8da544bddfcadf6be6a295dd4b38ab5ba0f9e8aa36f4188fd", "0x4098d83b4e8f506c7b85560a8e84017f845b1083b864e3975208ece07f98074f", "0xec6edff7cd40f0bc41b1ed6a129e88bec38cd6474f130363cd6dccc31d49a717", "0xa89aa9e24a3f0926bbbfc4c8a80ed872f58963f83d7d99b13f169463783f4e52", "0x07bb236e22e0d322d962bb28f329aed7ce8e9c460215d8700826a5faa777ccac", "0xf87aa14c01ee28584632c6db9b1667d27c8d0c0eb947d286318641e549dd3c1c", "0x2aeb9798bade7ece9a6fc803e9fb7359c14cb6c27dd986a27e8b20639dda5377", "0x07858381ad1ab29ac5a0f34fd78420cffa494c0dbb9bca64c1bff28075ba490b", "0x121d18d6770575a34480a8ddc268e87438e424d721d1b76c84cb60297d0a7156", "0xc54357b750662ef429845acfeacf482cffa4b253373e05199da3e01301823572", "0xe1bcd60bafc03acbcc8c8c6b454af4ecc1171cbc7d9ab4ed1e321bab82308af8", "0x7917615f4519f7160de4ac556c8de805ce8bc464e5784642cc937e000512ad0f"],
"hash": "0xb913521609feef2b7cc351efe0d0b359796c709176e8824622bc6dee312a227f",
"miner": "0x7c357530174275dd30e46319b89f71186256e4f7",
"mixHash": "0x0000b9b5b60cbaa58a008425f70c3e610794e9eb9ffa7e8c9ab257c451afcc22",
"nonce": "0x279486ec07bf61d6",
"number": "0x6b4",
"parentHash": "0xa24c81127edb0a630b13205b498d8ef0f7d47a4678e96827f8f19ffd2c470a24",
"pointerNumber": 1708,
"size": "0x101bb",
"timestamp": "0x5c9194ec"
}
}
```
***
#### etrue_snailBlockNumber
get current snail block number
##### Parameters
none
##### Returns
QUANTITY - integer of the current snail block number.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0", "method":"etrue_snailBlockNumber", "params":[],"id":100}'
// Result
{
"id":100,
"jsonrpc":"2.0",
"result": "0x38"
}
```
***
#### etrue_getCommittee
get committee member infomation
##### Parameters
```js
params: ["0x1"]
```
##### Returns
- `backups`: `Array` - Array of backup committee members, each committee member info contains pubkey、 coinbase、flag、type.
- `beginNumber`: `QUANTITY` - the begin fast block number.
- `beginSnailNumber`: `QUANTITY` - the begin snail block number.
- `endNumber`: `QUANTITY` - the end fast block number.
- `endSnailNumber`: `QUANTITY` - the end snail block number.
- `id`: `QUANTITY` - committeeId.
- `memberCount`: `QUANTITY` - the number of committee members .
- `members`: `Array` - Array of committee members.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0", "method":"etrue_getCommittee", "params":["0x1"],"id":100}'
// Result
{
"jsonrpc": "2.0",
"id": 100,
"result": {
"backups": [{
"PKey": "0488a25849abee5921fdb581ba34cd66adc8e02b108391c4153ca8da27722e16badf4fcd5ba7f557ae76d444ccf3638e4590a181805623de1cab67f31364c79736",
"coinbase": "0x76ea2f3a002431fede1141b660dbb75c26ba6d97",
"flag": 160,
"type": 161
}, {
"PKey": "04a9a1cedb8900d893b607c4dbc834abada3fe98f247b8bcb5ef44d3d3a246c4cf41d9d792527473c30ded81fa4b81afe7030a09e093dd92746b98c79e6a204c63",
"coinbase": "0x831151b7eb8e650dc442cd623fbc6ae20279df85",
"flag": 160,
"type": 161
}, {
"PKey": "040d153624462927444a8212717e4ad41ec5f5739bc36598d093d114729e1dc782d55d322699705829cf9d69f201009db797ebe8ba952f10a26fe36c64356b111b",
"coinbase": "0x1074f7deccf8c66efcd0106e034d3356b7db3f2c",
"flag": 160,
"type": 161
}, {
"PKey": "04a3474c26578fce00d241119758271f6a208cc987c6f37d1518dcea2a51257bafeebd93202ae499cb5a8986720d4b63a04043aadb4d03430194a81860c9ca0763",
"coinbase": "0xd985e9871d1be109af5a7f6407b1d6b686901fff",
"flag": 160,
"type": 161
}, {
"PKey": "04a3e174523b1054e14f123580bce258745e65591c2a4ee44764e55eb87a3782c9920d306e6121d4f10f8726800497ad9ca5a0bfdfe0832779dbaf7b95b3bf0111",
"coinbase": "0x7c357530174275dd30e46319b89f71186256e4f7",
"flag": 160,
"type": 161
}, {
"PKey": "04d370defb1b7b8c086f98c4a7d7b90348b088cd2effdcc27b86feebdff499a192b4a5a5b16a400625271d69b3fa7d8c42c8b2e15c910cd1f314f28eb5beb73342",
"coinbase": "0x4cf807958b9f6d9fd9331397d7a89a079ef43288",
"flag": 160,
"type": 161
}, {
"PKey": "04f67ab0cd48f626da89c718bcd909a04dea393d632d3191891539ef2f5ff6bb1e5d340ebe94cb6d9126b26e1ec64bb4783e9e8ddf31346b53d651d15eb226142e",
"coinbase": "0x04d2252a3e0ca7c2aa81247ca33060855a34a808",
"flag": 160,
"type": 161
}],
"beginNumber": 19781,
"beginSnailNumber": 1,
"endNumber": 30725,
"endSnailNumber": 168,
"id": 1,
"memberCount": 21,
"members": [{
"PKey": "04ad2da6433f25f5063c98fb414496bd794f3054544408a63da4c6488a35a7c7ba38e8dbae49356182dcd81f45a715feb1f7f696c3a1bd77e33ab8ab41d8177ca3",
"coinbase": "0x7c357530174275dd30e46319b89f71186256e4f7",
"flag": 161,
"type": 162
}, {
"PKey": "04eb9577ae8e19d99f708b8d46de17220afaf2d4a89676d98c8e8558e4e10f0283733a6a4a47aee779081cedd9266d5b4edcfc4fa22a4d69e3da98f6a03ad4e372",
"coinbase": "0x7c357530174275dd30e46319b89f71186256e4f7",
"flag": 161,
"type": 162
}, {
"PKey": "0497413104d718ef592fa4526e796be092a143272f9c7b415c23c73201a9cf3da2ec928e11958246ee2f8e838ec67506e798c4e8fcec89f5e8c9696235f600e765",
"coinbase": "0x7c357530174275dd30e46319b89f71186256e4f7",
"flag": 161,
"type": 162
}, {
"PKey": "04dc2a2cba3793da755d28f02336193a8e04c77cb3fdef5f04a4197c71f59f978767729ff652267e4c0fc9204c7e921931c207e32ba442ac27a20acaad49324696",
"coinbase": "0x7c357530174275dd30e46319b89f71186256e4f7",
"flag": 161,
"type": 162
}, {
"PKey": "047a523df31438d3efc02c4126b891d5e1258371336decfe43a15efcb519607aa2b932f895808f4414f75b525d7a490e10be314a6b60971c7149156b9d659fb591",
"coinbase": "0x7c357530174275dd30e46319b89f71186256e4f7",
"flag": 161,
"type": 162
}, {
"PKey": "04ea62525863113273df44d8b5bbbcf0c1df5d03b94dd60308b747c1894af70dd5eaf5facfb1577bb4416ba517375ce662769f69b0c5fa961ac0cd9a4a342e4f67",
"coinbase": "0x7c357530174275dd30e46319b89f71186256e4f7",
"flag": 161,
"type": 162
}, {
"PKey": "04601fc9ac609d9d47d01f76bcdf496a1b3d2aaf9dc4c97319faff49e2284ad843aa5505343376db1357b9cc0d176fe828d7a07cc8cd0993aee3b76d77eda2be4b",
"coinbase": "0x4cf807958b9f6d9fd9331397d7a89a079ef43288",
"flag": 161,
"type": 162
}, {
"PKey": "04b64ba599ff0e0c2418357f87ed6058f04801ce0e0f653e336aa2f0b9c9620b1ed9222648100d7cadfbbe2cadb66b94e66eeed80b0a96da7808bc55fd8dd282a2",
"coinbase": "0x7c357530174275dd30e46319b89f71186256e4f7",
"flag": 161,
"type": 162
}, {
"PKey": "044aa7cef6d282ec22e0ef6d55d36b17d607afee920668320430717552cd7d4905e07d92a0e939f96ef6d617174a136267ed6a4efcc14879abe6aa097965fb4740",
"coinbase": "0x7c357530174275dd30e46319b89f71186256e4f7",
"flag": 161,
"type": 162
}, {
"PKey": "04506b3c55ac57f78b41b2e47afc8d0f8d9891803822bbc4fe35bf3be72ad91056b0aae8a5fa76309f093987202a284c67d5918ca23a31e2e6535255c58240bf59",
"coinbase": "0x7c357530174275dd30e46319b89f71186256e4f7",
"flag": 161,
"type": 162
}, {
"PKey": "04a69c470e1b4ea2a05d8a70de7c15687131bbb66105049a5bbdb04645381a29899ec72af7929c645ec0d29a91b4359de2629618b763a333d52bb4f436cccf9a9d",
"coinbase": "0x7c357530174275dd30e46319b89f71186256e4f7",
"flag": 161,
"type": 162
}, {
"PKey": "046e61555ed9bd6bb08b3f5034373bfc4472a8ca8868d21e1ceb4fe3f24c42c3a5dc7cb492ca62a31bfa6c82f86fed02dfa23196c25a76673ddb7a1f3f6eaafc84",
"coinbase": "0x7c357530174275dd30e46319b89f71186256e4f7",
"flag": 161,
"type": 162
}, {
"PKey": "04eb4c070000b1c4525e42d2cf61a0f1449ef82ce534a19ff03cf8c2a480d16e9738f5162972e15262992eb21cf561b7bae2e49e9dc8eb2b8f52dd9100f2bdce4e",
"coinbase": "0x7c357530174275dd30e46319b89f71186256e4f7",
"flag": 161,
"type": 162
}, {
"PKey": "047fc0ae115cadf26b472ed4bed8785ca535c9fe53eb896bd21d7d7d7e1ee242881c50fa5eeaba4465e1992d5b917ae1f891c1e85e0bb5e0201e885886e846102b",
"coinbase": "0x7c357530174275dd30e46319b89f71186256e4f7",
"flag": 161,
"type": 162
}]
}
}
```
***
#### etrue_getFruitByNumber
get fruit block by fruit number
##### Parameters
1. `QUANTITY` - integer of the fruit number.
2. `Boolean` - if contais fruit signs of committee member.
##### Example Parameters
```js
params: [
"0x1",
false
]
```
##### Returns
`Object` - A fruit object, or `null` when no fruit was found:
- `difficulty`: `QUANTITY` - integer of the difficulty for this snail reward block.
- `extraData`: `DATA` - the "extra data" field of this reward block.
- `fastHash`: `DATA`, 32 Bytes - hash of the fruit.
- `fastNumber`: `QUANTITY` - fruit.
- `fruitDifficulty`: `QUANTITY` - integer of all fruit difficulty for the fruit.
- `hash`: `DATA`, 32 Bytes - hash of the fruit.
- `miner`: `DATA`, 20 Bytes - the address of the beneficiary to whom the mining rewards were given.
- `mixHash`: `DATA`, 32 Bytes - the mix digest.
- `nonce`: `QUANTITY` - the mining nonce.
- `number`: `QUANTITY` - the fruit number.
- `size`: `QUANTITY` - integer the size of the fruit in bytes.
- `timestamp`: `QUANTITY` - the unix timestamp for when the fruit was collated.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0", "method":"etrue_getFruitByNumber", "params":["0x1",false],"id":100}'
// Result
{
"jsonrpc": "2.0",
"id": 100,
"result": {
"difficulty": "0x4e20",
"extraData": "0xd9820a008667657472756588676f312e31302e38856c696e7578",
"fastHash": "0x190c33741f18c86ac9b3b3e1102e35c95a354cb6c9214ccc1f0fa28f950840b5",
"fastNumber": 1,
"fruitDifficulty": "0x64",
"hash": "0xd5d8719f456a59249570bb7adf9e37c7d2e30621fbc0aab8ee2817bf591e3acc",
"miner": "0x7c357530174275dd30e46319b89f71186256e4f7",
"mixHash": "0xb01e70ab492dcede93395389b9193201011e950f181180f78ad98ae58184601d",
"nonce": "0x033aebb6a27a911a",
"number": 1,
"signs": 5,
"size": 865,
"timestamp": "0x5c87b12a"
}
}
```
***
#### etrue_getFruitByHash
get fruit block by fruit hash
##### Parameters
1. `DATA`, 32 Bytes - hash of fast block.
2. `Boolean` - if contais fruit signs of committee member.
##### Example Parameters
```js
params: [
"0x190c33741f18c86ac9b3b3e1102e35c95a354cb6c9214ccc1f0fa28f950840b5",
false
]
```
##### Returns
See [etrue_getFruitByNumber](#etrue_getFruitByNumber)
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0", "method":"etrue_getFruitByHash", "params":["0x190c33741f18c86ac9b3b3e1102e35c95a354cb6c9214ccc1f0fa28f950840b5",false],"id":100}'
```
// Result
See [etrue_getFruitByNumber](#etrue_getFruitByNumber)
***
#### etrue_getRewardBlock
return the fast block position where the given snail block is rewarded
##### Parameters
1. `QUANTITY` - integer of the snail reward block number
##### Example Parameters
```js
params: [
"0x15"
]
```
##### Returns
`Object` - A fast block object, or `null` when no snail reward block was found:
- `committeeRoot`: `DATA`, 32 Bytes - hash of committee members.
- `snailHash`: `DATA`, 32 Bytes - hash of the snail reward block.
- `snailNumber`: `QUANTITY` - the reward snail number.
- `extraData`: `DATA` - the "extra data" field of fast block.
- `gasLimit`: `QUANTITY` - the maximum gas allowed in fast block.
- `gasUsed`: `QUANTITY` - the maximum gas allowed in fast block.
- `hash`: `DATA`, 32 Bytes - hash of the fast block.
- `logsBloom`: `DATA`, 256 Bytes - the bloom filter for the logs of the block. `null` when its pending block.
- `number`: `QUANTITY` - the fast block number.
- `parentHash`: `DATA`, 32 Bytes - hash of the parent block.
- `receiptsRoot`: `DATA`, 32 Bytes - the root of the receipts trie of the fast block.
- `signs`: `Array` - Array of each committee member sign.
- `size`: `QUANTITY` - integer the size of the fast block in bytes.
- `stateRoot`: `DATA`, 32 Bytes - the root of the final state trie of the fast block.
- `switchInfos`: `Array`, - Array of switch committee member.
- `timestamp`: `QUANTITY` - the unix timestamp for when the fast block was collated.
- `transactions`: `Array` - Array of transaction objects, or 32 Bytes transaction hashes depending on the last given parameter.
- `transactionsRoot`: `DATA`, 32 Bytes - the root of the transaction trie of the fast block.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0", "method":"etrue_getRewardBlock", "params":["0x15"],"id":100}'
// Result
{
"jsonrpc": "2.0",
"id": 100,
"result": {
"committeeRoot": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
"SnailHash": "0xeae9f91963eb64f0ca6e5bcf8551d8efd0d1c7f8d5ff207856c303faef86e419",
"SnailNumber": 21,
"extraData": "0x",
"gasLimit": "0x4b99999",
"gasUsed": "0x668a0",
"hash": "0x5cc873dd449c7c15676211d8adf334da8e46b65cfa336e638678fbe4bc05ae5b",
"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
"number": "0x7e5",
"parentHash": "0x3f1105c6fa853944a84fe9ef7eefcc2bcbb08860c302aed652c773d1bbc0b2f0",
"receiptsRoot": "0x824c56f642d67e881555ec142168cc2364a1343129e34044dea382088cb5fa42",
"signs": [{
"fastHash": "0x5cc873dd449c7c15676211d8adf334da8e46b65cfa336e638678fbe4bc05ae5b",
"fastHeight": "0x7e5",
"result": 1,
"sign": "0x763026fef783d8bfdf4b06309a1aafbebce229e846383131dc430c6c29ff42bd033d3719f4c70e96bd5a80e46a9a67d2f647fbc7c2e0a7b32c0cf8824feca29300"
}, {
"fastHash": "0x5cc873dd449c7c15676211d8adf334da8e46b65cfa336e638678fbe4bc05ae5b",
"fastHeight": "0x7e5",
"result": 1,
"sign": "0x4c11748616eda54ca216fc8fd28957459c629caea7967e73f23ac02419e9dfba4650b7cbfd3fd9a0f4737724234941c98fa9a6ad00ffd3f860e9dd5be5ac366c00"
}, {
"fastHash": "0x5cc873dd449c7c15676211d8adf334da8e46b65cfa336e638678fbe4bc05ae5b",
"fastHeight": "0x7e5",
"result": 1,
"sign": "0x86d689580eac3ce23453dec705ed8cd5c0ed992d0a4296ebea4bc5373f90bb1a56fbc121d6146f4c7ac6416e74b5a876012e25497dd70402b3461c13c9475a2800"
}, {
"fastHash": "0x5cc873dd449c7c15676211d8adf334da8e46b65cfa336e638678fbe4bc05ae5b",
"fastHeight": "0x7e5",
"result": 1,
"sign": "0xaa1d76682f8ce81fa449819a6921808010114d4433945da40d323d5d8f57ebac78fc7096fbf0307dcdac5e8c9e6b2be80aa3959a6e6304d85d7a534e0e2714cc00"
}, {
"fastHash": "0x5cc873dd449c7c15676211d8adf334da8e46b65cfa336e638678fbe4bc05ae5b",
"fastHeight": "0x7e5",
"result": 1,
"sign": "0x90b4ce8a7a13d070d9b360173e1c96dd7d95c33e7f7689187117dafae46393a8764ce36db25881fcbf82ba692b18eb2450aa2f69667391e6c55025d9f6704d1701"
}],
"size": "0xca7",
"stateRoot": "0xc422d6752c0aa8e0a773ddd5b12950f3c30361ce7320c6fa59eb77c9f36ca07e",
"switchInfos": [],
"timestamp": "0x5c87bf4c",
"transactions": ["0xee311d9a6e95b0740488a8c797fc36b0ddbba97005c8623d0c8258509ad0e34b", "0x9be94692e83f76fbf8a9ff7a4b9caa83141bf5c7bd91b768669802b18357146c", "0x167c29e6b6278a999c0debe02b51407cbe9f23e701f53fa2c80e141ab42f8cd4", "0x481f16a6866ce56774c5a14bfbf9a19391868761d09403acaea4d9a74fe33bd7", "0x133457504d0c23f84b58b9f82aae15012b48c5bcb5fcff904d795fe78de1ce88", "0xff98231ecd6b0358d15eec72ebb8920ed5312c30305fb21845485316b1cf8ddd", "0x3282ec6633cb743a2e177f0a999b1f366bcf900069c33c40a4a1c3b7b4fc5ed6", "0x897e1b6226666a5c031bf528527e68efb63a7d3c4b6431d758858c554a3cf38a", "0x034bf45b679a2283deec9c3c514b0dfe6dc1ab4980864ceeafd9989bd56410f0", "0x129bc008bcae647a55d900068ae657e3f9073a37d03933d149ba529abd15c63c", "0xc5831516e417510b6f4069093c8845de24e62a1adee409c35164b8b6cf26465d", "0xb0ef3a7209af20990b2e346dc7f963d11e0da3a42ae04640502b81e30ac96202", "0x8c79698e30cbd7c50781eaa6077667428cf51027086762d9349ee9987d9ebe36", "0xf48839d7212c9d01684237131f68f81a30fe6635eb39b0030bab3e68c75bbefa", "0x94aff39d085551389a198378137e5dd694ce689e5ad326910f18f167ff81f16c", "0x882c79c2678a0fc0099bca068ca05bb239405c8a2f363a3b755b4049c67f41c7", "0xaa5855c69051b82716bdc9b7f9190ef06c06411d0d43d8786fbf14a3898446a6", "0x508b4357b911624c11bb5a90d880c86ed92f5f430454f64b6e63ea884cec0589", "0x652a73ec17dab453db88a9e292bf684a814101d7013a489fbbae98ed9c221f03", "0xa95cbff42440d0a000ad55969f95fc5b5ff947efd95dbb0f9607acf849dbfbd9"],
"transactionsRoot": "0xcfcce7b64115b9086a78c0449ceb70aac9b08c0d221943470ffacbbdc71fba9a"
}
}
```
***
#### etrue_getSnailBlockByNumber
get snail block by number
##### Parameters
1. `QUANTITY` - integer of the snail block number,or the string `"latest"`, `"earliest"` or `"pending"`, see the [default block parameter](#the-default-block-parameter)
2. `Boolean` - whether show fruits in snail block
##### Example Parameters
```js
params: [
"0x19",
false
]
```
##### Returns
`Object` - A snail block object, or `null` when no snail block was found:
- `beginFruitNumber`: `QUANTITY` - the beign fruit number in snail reward block.
- `difficulty`: `QUANTITY` - integer of the difficulty for this snail reward block.
- `endFruitNumber`: `QUANTITY` - the end fruit number in snail reward block.
- `extraData`: `DATA` - the "extra data" field of this reward block.
- `fruitDifficulty`: `QUANTITY` - integer of all fruit difficulty for this snail reward block.
- `fruitsHash`: `DATA`, 32 Bytes - hash of fruits in snail reward block.
- `fruits`: `Array` - Array of all hash of fruits in snail reward block.
- `hash`: `DATA`, 32 Bytes - hash of the snail reward block.
- `miner`: `DATA`, 20 Bytes - the address of the beneficiary to whom the mining rewards were given.
- `mixHash`: `DATA`, 32 Bytes - the mix digest.
- `nonce`: `QUANTITY` - the mining nonce.
- `number`: `QUANTITY` - the snail block number.
- `parentHash`: `DATA`, 32 Bytes - hash of the parent block.
- `pointerNumber`: `QUANTITY` - current snail reward block minus 7.
- `size`: `QUANTITY` - integer the size of this reward block in bytes.
- `timestamp`: `QUANTITY` - the unix timestamp for when the block was collated.
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0", "method":"etrue_getSnailBlockByNumber", "params":["0x19",false],"id":100}'
// Result
{
"jsonrpc": "2.0",
"id": 100,
"result": {
"beginFruitNumber": "0x5a9",
"difficulty": "0x9e86",
"endFruitNumber": "0x5e4",
"extraData": "0xd9820a008667657472756588676f312e31302e38856c696e7578",
"fruitDifficulty": "0x64",
"fruitsHash": "0x02c44355f9aa43305f7507efd77ab13a74b0a7bde1d923ac62135e8e3bfe4afd",
"fruits": 60,
"hash": "0x6fd8a5f62ec65a6f244be17a32605c705736ed960130bad87b79730312d77741",
"miner": "0x7c357530174275dd30e46319b89f71186256e4f7",
"mixHash": "0x000122785a555ca6b63c54e1ff398cf5ae9f6176391de526a7d3a9277b13cfaf",
"nonce": "0x719c13f20436b852",
"number": "0x19",
"parentHash": "0x1d2361639c4b26f9481caf680e6db21af1c8d9159f804b01a37611a1e057487a",
"pointerNumber": 17,
"size": "0xcee1",
"timestamp": "0x5c87bbcf"
}
}
```
***
#### etrue_getSnailBlockByHash
get snail block by hash
##### Parameters
1. `DATA`, 32 Bytes - hash of snail block .
2. `Boolean` - if contais fruit signs of committee member.
##### Example Parameters
```js
params: [
"0x6fd8a5f62ec65a6f244be17a32605c705736ed960130bad87b79730312d77741",
false
]
```
##### Returns
See [etrue_getSnailBlockByNumber](#etrue_getSnailBlockByNumber)
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0", "method":"etrue_getSnailBlockByHash", "params":["0x6fd8a5f62ec65a6f244be17a32605c705736ed960130bad87b79730312d77741",false],"id":100}'
```
// Result
See [etrue_getSnailBlockByNumber](#etrue_getSnailBlockByNumber)
***
#### etrue_getDataset
the Minverva algorithm calculates the required source of dataset, and updates the dataset every 12,000
##### Parameters
none
##### Returns
[null,null,null,null,null,null....,null].
-when snailBlock number exceed 12000, return not nil
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0", "method":"etrue_getDataset", "params":[],"id":100}'
// Result
{
"jsonrpc": "2.0",
"id": 100,
"result": {
[null, null, null, null, ......, null, null]
}
}
```
***
#### etrue_getSnailRewardContent
get snailBlock reward imfomation, including snailBlock miner,fruit miner and committee reward for each fruit
##### Parameters
1. `QUANTITY` - integer of a block number.
##### Returns
- `blockminer`: -snailblock miner address and reward
- `committeReward`: -committee member address and reward for all fruit
- `fruitminer`: -fruit miner address and reward for each fruit
##### Example
```js
// Request
curl -X POST --data '{"jsonrpc":"2.0", "method":"etrue_getSnailRewardContent", "params":["0x1"],"id":100}'
// Result
{
"jsonrpc": "2.0",
"id": 100,
"result": {
"blockminer": {
"0x7c357530174275dd30e46319b89f71186256e4f7": 61629629629629000000
},
"committeReward": {
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"fruitminer": [{
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}]
}
}
```
## Eth
In order for more developers to participate in the truechain ecosystem and be friendly to developers, truechain is compatible with ethereum. Please refer to the instructions of [ethereum](https://github.com/ethereum/wiki/wiki/JSON-RPC) for detailed rules of use
- Document Center
- TrueChain Introduce
- Product Ecological
- TrueChain Website
- True - Blockchain Wallet App
- TrueScan - Blockchain Browser
- GreenBelt - Browser Plug-in Wallet
- Developer's-Platform - Develop blockchain application and issue Token
- Stellar - Contract compilation, deployment, and invocation tools
- Technical Document
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- Solidity developing smart contract courses
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- DApp development guide
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- RPC API
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- True Miner
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- TRUE Swap Announcement
- Glossary
- Guidelines for docking with exchanges