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JSON RPC 接口命令

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2023-12-01

JSON <http://json.org/> ( JavaScript Object Notation) ，是一种轻量级的数据交互格式.

JSON-RPC <http://www.jsonrpc.org/specification> 是一个无状态的轻量级远程过程调用（RPC）协议。 这个协议定义了一套数据结构和围绕它们的规则处理。 它与传输过程无关，可以通过socket，HTTP或其它多种传输方式使用这些数据。 通常使用的数据格式是 JSON (RFC 4627 <http://www.ietf.org/rfc/rfc4627.txt>).

MOAC 系统中的基础链节点 VNODE 和应用链节点 SCS 都内置了JSON-RPC 接口来方便用户使用。 MOAC JSON-RPC 部分接口兼容 ETHEREUM JSON-RPC, 如下表所示：

Chain3Web3.js
chain3web3
mceth
netnet
adminadmin
txpooltxpool
personalpersonal
vnoden/a
scsn/a

MOAC 和 ETHEREUM 相同的接口对象有net, admin, txpool 和personal. 此外，chain3 对象 mc 中的方法和 web3 中部分方法也可以互用。 MOAC 独有的两个 JSON-RPC 对象是 VNODE 和 SCS，分别对应VNODE的部分属性和SCS接口。

默认启动VNODE的时候，chain3，mc，和net是默认启动的，其它部分需要指定： .. code:: bash

moac --rpc --rpcapi "chain3, mc, net, txpool"

可以打开txpool的JSON-RPC命令接口。

JSON-RPC Endpoint

默认 JSON-RPC 的接入为:

ClientURL
Gohttp://localhost:8545

在VNODE和SCS监听节点启动时，可以使用 HTTP JSON-RPC 选项``--rpc`` 命令来开启：

--rpc: 启用HTTP的RPC服务，以便非本机访问该MOAC节点服务；

母链节点

moac --rpc

VNODE 默认RPC接口的地址是 localhost，端口号是 8545，可以通过 rpcaddr 和 rpcport 选项进行修改：

moac --rpc --rpcaddr <ip> --rpcport <portnumber>

VNODE和SCS的JSON-RPC接口默认使用同源的服务方式。如果要通过浏览器来访问 JSON-RPC 接口，需要允许CORS选项，否则访问无法成功：

moac --rpc --rpccorsdomain "http://localhost:3000"

--rpcapi value: 指定RPC要开放的API服务，默认为"chain3,mc,net"，常用的一般还会配置比如personal,admin,debug,miner,txpool,db,shh等，但是因为RPC服务是明文传输，所以，如果使用personal的时候，要注意安全问题；

应用链节点

启用HTTP的RPC服务，以便非本机访问该MOAC节点服务

scsserver --rpc

SCS 默认RPC接口的地址是 localhost，端口号是 8548，可以通过 rpcaddr 和 rpcport 选项进行修改：

scsserver --rpc --rpcaddr <ip> --rpcport <portnumber>

如果要通过浏览器来访问 JSON-RPC 接口，需要允许CORS选项，否则访问无法成功：

scsserver --rpc --rpccorsdomain "http://localhost:8548"

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, ":raw-latex:`\0`B:raw-latex:`0`") - 0x (size 0, "") - WRONG: 0xf0f0f (must be even number of digits) - WRONG: 004200 (must be prefixed 0x)

Currently MOAC <https://github.com/MOACChain/moac-core/releases> VNODE server provides JSON-RPC communication over http and IPC (unix socket Linux and OSX/named pipes on Windows). SCS server provides JSON-RPC communication over http only.

默认区块值

以下接口包含默认区块值。如果没有有效区块数值输入，则使用节点的最高区块高度：

When requests are made that act on the state of moac, 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 命令示例

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 assume a local MOAC node is running and connected to testnet (network id = 101). The URL/IP & port combination is localhost:8545 or '127.0.0.1', which must be the last argument given to curl.

JSON-RPC 命令

CHAIN3

Chain3_clientVersion

Returns the current client version.

Parameters

none

Returns

String - The current client version

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"chain3_clientVersion","params":[],"id":101}' 'localhost:8545'

// Result
{
  "jsonrpc":"2.0",
  "id":101,
  "result":"Moac/v0.8.3-release-ad500ab5/darwin-amd64/go1.10"
}

Chain3_sha3

返回输入数据的 Keccak-256 (not the standardized SHA3-256) 哈希值（HASH）.

Parameters

  1. 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":"chain3_sha3","params":["0x68656c6c6f20776f726c64"],"id":101}' localhost:8545

// Result
{
  "jsonrpc":"2.0",
  "id":101,
  "result":"0x47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad"
}

NET

net_version

返回当前网络 ID，MOAC网络主网为99， 测试网为101，本地调试私网默认为100.

Parameters

none

Returns

String - The current network id. - "99": MOAC Mainnet - "101": MOAC Testnet - "100": Devnet

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"net_version","params":[],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "101"
}

net_listening

Returns true if client is actively listening for network connections.

Parameters

none

Returns

Boolean - true when listening, otherwise false.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"net_listening","params":[],"id":101}' localhost:8545

// Result
{
  "id":101,
  "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

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"net_peerCount","params":[],"id":101}' localhost:8545

// Result
{
  "id":74,
  "jsonrpc": "2.0",
  "result": "0x4" // 4 net peers are connecting
}

MC

mc_protocolVersion

Returns the current MOAC protocol version.

Parameters

none

Returns

String - The current MOAC protocol version

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_protocolVersion","params":[],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0x3f"
}

mc_syncing

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

Parameters

none

Returns

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

  • startingBlock: QUANTITY - The block at which the

import started (will only be reset, after the sync reached his head) - currentBlock: QUANTITY - The current block, same as mc_blockNumber - highestBlock: QUANTITY - The estimated highest block

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_syncing","params":[],"id":101}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": {
    startingBlock: '0x384',
    currentBlock: '0x386',
    highestBlock: '0x454'
  }
}
// Or when not syncing
{
  "id":101,
  "jsonrpc": "2.0",
  "result": false
}

mc_coinbase

Returns the client coinbase address.

Parameters

none

Returns

DATA, 20 bytes - the current coinbase address.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_coinbase","params":[],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0x407d73d8a49eeb85d32cf465507dd71d507100c1"
}

mc_mining

Returns true if client is actively mining new blocks.

Parameters

none

Returns

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

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_mining","params":[],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": true
}

mc_hashrate

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

Parameters

none

Returns

QUANTITY - number of hashes per second.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_hashrate","params":[],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0x38a"
}

mc_gasPrice

Returns the current price per gas in sha.

Parameters

none

Returns

QUANTITY - integer of the current gas price in sha.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_gasPrice","params":[],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0x09184e72a000" // 10000000000000
}

mc_accounts

Returns a list of addresses owned by client.

Parameters

none

Returns

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

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_accounts","params":[],"id":101}' localhost:8545

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": ["0x407d73d8a49eeb85d32cf465507dd71d507100c1","0x87dc9d8014e189b9d32c622a9ad1d02f72383979"]
}

mc_blockNumber

Returns the number of most recent block.

Parameters

none

Returns

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

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_blockNumber","params":[],"id":101}' 'localhost:8545'

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

mc_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>
params: [
   '0x407d73d8a49eeb85d32cf465507dd71d507100c1',
   'latest'
]

Returns

QUANTITY - integer of the current balance in sha.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_getBalance","params":["0x87dc9d8014e189b9d32c622a9ad1d02f72383979", "latest"],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0x12f8b3a319c000" // 5340000000000000
}

mc_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 0x02701dc451e126316ece6870fd70ea140efa7b15 by address 0xa8863fc8ce3816411378685223c03daae9770ebb.

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": "mc_getStorageAt", "params": ["0x02701dc451e126316ece6870fd70ea140efa7b15", "0x0", "latest"], "id": 101}' 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 moac console which comes with the chain3 library can be used to make the calculation:

> var key = "000000000000000000000000391694e7e0b0cce554cb130d723a9d27458f9298" + "0000000000000000000000000000000000000000000000000000000000000001"
undefined
> chain3.sha3(key, {"encoding": "hex"})
"0x6661e9d6d8b923d5bbaab1b96e1dd51ff6ea2a93520fdc9eb75d059238b8c5e9"

Now to fetch the storage:

curl -X POST --data '{"jsonrpc":"2.0", "method": "mc_getStorageAt", "params": ["0x295a70b2de5e3953354a6a8344e616ed314d7251", "0x6661e9d6d8b923d5bbaab1b96e1dd51ff6ea2a93520fdc9eb75d059238b8c5e9", "latest"], "id": 101}' localhost:8545

{"jsonrpc":"2.0","id":101,"result":"0x000000000000000000000000000000000000000000000000000000000000162e"}

mc_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>
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":"mc_getTransactionCount","params":["0x57d83802a772adf506a89f5021c93a05749e3c6e","latest"],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0x29" // 41
}

mc_getBlockTransactionCountByHash

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

Parameters

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

Returns

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

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_getBlockTransactionCountByHash","params":["0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238"],"id":101}' localhost:8545

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

mc_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>.
params: [
   '0xe8', // 232
]

Returns

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

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_getBlockTransactionCountByNumber","params":["0xe8"],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0xa" // 10
}

mc_getUncleCountByBlockHash

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

Parameters

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

Returns

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

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_getUncleCountByBlockHash","params":["0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238"],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0x1" // 1
}

mc_getUncleCountByBlockNumber

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

Parameters

  1. QUANTITY|TAG - integer of a block number, or the string "latest", "earliest" or "pending", see the default block parameter <#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":"mc_getUncleCountByBlockNumber","params":["0xe8"],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0x1" // 1
}

mc_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>
params: [
   '0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b',
   '0x2'  // 2
]

Returns

DATA - the code from the given address.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_getCode","params":["0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b", "0x2"],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0x600160008035811a818181146012578301005b601b6001356025565b8060005260206000f25b600060078202905091905056"
}

mc_sign

The sign method calculates an MOAC specific signature with: sign(keccak256("\x19MOAC Signed Message:\n" + len(message) + message))).

By adding a prefix to the message makes the calculated signature recognisable as an MOAC 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

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_sign","params":["0x57d83802a772adf506a89f5021c93a05749e3c6e", "0xdeadbeaf"],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0xefa354f816ab378a7da6ec25afe9e6393b72a3c06b2d08550815cc43d1993f6c58afbf228559df6a39ac419bef847ca2dc3047886df6a0f06a4c5e6a4e2dc9a61c"
}

An example how to use solidity ecrecover to verify the signature calculated with :ref:`mc_sign` can be found here <https://gist.github.com/bas-vk/d46d83da2b2b4721efb0907aecdb7ebd>. The contract is deployed on the testnet Ropsten and Rinkeby.

mc_sendTransaction

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

Note the address to sign with must be unlocked.

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. MOAC used the solidity ABI. For details see Ethereum Contract ABI <https://github.com/ethereum/wiki/wiki/Ethereum-Contract-ABI>
  • nonce: QUANTITY - (optional) Integer of a nonce. This allows to overwrite your own pending transactions that use the same nonce.
params: [{
  "from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
  "to": "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 mc_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":"mc_sendTransaction","params":[{see above}],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331"
}

mc_sendRawTransaction

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

Parameters

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

Returns

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

Use mc_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":"mc_sendRawTransaction","params":[{see above}],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331"
}

mc_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. mc_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. For details see Ethereum Contract ABI <https://github.com/ethereum/wiki/wiki/Ethereum-Contract-ABI>
  1. 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

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_call","params":[{see above}],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0x"
}

mc_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 mc_call parameters, expect that all properties are optional. If no gas limit is specified moac 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":"mc_estimateGas","params":[{see above}],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0x5208" // 21000
}

mc_getBlockByHash

Returns information about a block by hash.

Parameters

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

Returns

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

  • number: QUANTITY - the block number. null when its pending block.
  • hash: DATA, 32 Bytes - hash of the block. null when its pending block.
  • parentHash: DATA, 32 Bytes - hash of the parent block.
  • 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":"mc_getBlockByHash","params":["0x9d88f2a2a348eec743b149f461fddcf0843d3920ddf998896672cee476b99127", true],"id":101}' localhost:8545

// Result
{
"jsonrpc":"2.0",
"id":101,
"result":{
  "difficulty":"0x9ad5136",
  "extraData":"0xdd854d4f41432d85302e382e332d87676f312e382e338777696e646f7773",
  "gasLimit":"0x895440",
  "gasUsed":"0x0",
  "hash":"0x9d88f2a2a348eec743b149f461fddcf0843d3920ddf998896672cee476b99127",
  "logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
  "miner":"0x0a2168d2f08161c01745fec4e6e8fe06f314ab41",
  "mixHash":"0xd6e9f8d36f8f0f57abff5ccf6390ece4d5a14eb624779628fd6e6119451589e2",
  "nonce":"0x423e7acb4d05a23c",
  "number":"0x4803d",
  "parentHash":"0xc494dbda1ef4f673fd14fc487a1346a7747a41910d1a1f0e72d6e0e660c0e792",
  "receiptsRoot":"0x9287370eb27f11b0c2188431cbc58a23b685f02dbd851ed4d974f932bd780839",
  "sha3Uncles":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
  "size":"0x24e",
  "stateRoot":"0xff791a26fd0cb6addfe4bec0287b3905bf44898f0fd71e446cb1385f94333e18",
  "timestamp":"0x5b1f3a14",
  "totalDifficulty":"0x325dc638b38e",
  "transactions":[{"blockHash":"0x9d88f2a2a348eec743b149f461fddcf0843d3920ddf998896672cee476b99127","blockNumber":"0x4803d","from":"0x0000000000000000000000000000000000000064","gas":"0x0","gasPrice":"0x4a817c800","hash":"0x52ccd05bdfb137fcbb6154f1cb7c006ba53cd8ce80511841d2e7b3c6324d49df","input":"0xc1c0e9c4","nonce":"0x4803c","syscnt":"0x65","to":"0x0000000000000000000000000000000000000065","transactionIndex":"0x0","value":"0x0","v":"0x0","r":"0x0","s":"0x0","shardingFlag":"0x0"}],
  "transactionsRoot":"0xa29e25d8e3db000e44122a594cc52a7bf050850b3a7e028fd54cb83784fc1bc3",
  "uncles":[]
  }
}

mc_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.
params: [
   '0x1b4', // 436
   true
]

Returns

See mc_getBlockByHash

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_getBlockByNumber","params":["0x1b4", true],"id":101}' localhost:8545

Result see mc_getBlockByHash

mc_getTransactionByHash

Returns the information about a transaction requested by transaction hash.

Parameters

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

Returns

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

  • hash: DATA, 32 Bytes - hash of the transaction.
  • nonce: QUANTITY - the number of transactions made by the sender prior to this one.
  • blockHash: DATA, 32 Bytes - hash of the block where this transaction was in. null when its pending.
  • blockNumber: QUANTITY - block number where this transaction was in. null when its pending.
  • transactionIndex: QUANTITY - integer of the transactions index position in the block. null when its pending.
  • from: DATA, 20 Bytes - address of the sender.
  • to: DATA, 20 Bytes - address of the receiver. null when its a contract creation transaction.
  • value: QUANTITY - value transferred in Wei.
  • gasPrice: QUANTITY - gas price provided by the sender in Wei.
  • gas: QUANTITY - gas provided by the sender.
  • input: DATA - the data send along with the transaction.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_getTransactionByHash","params":["0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238"],"id":101}' localhost:8545

// Result
{
"id":101,
"jsonrpc":"2.0",
"result": {
    "hash":"0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b",
    "nonce":"0x",
    "blockHash": "0xbeab0aa2411b7ab17f30a99d3cb9c6ef2fc5426d6ad6fd9e2a26a6aed1d1055b",
    "blockNumber": "0x15df", // 5599
    "transactionIndex":  "0x1", // 1
    "from":"0x407d73d8a49eeb85d32cf465507dd71d507100c1",
    "to":"0x85h43d8a49eeb85d32cf465507dd71d507100c1",
    "value":"0x7f110", // 520464
    "gas": "0x7f110", // 520464
    "gasPrice":"0x09184e72a000",
    "input":"0x603880600c6000396000f300603880600c6000396000f3603880600c6000396000f360",
  }
}

mc_getTransactionByBlockHashAndIndex

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

Parameters

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

Returns

See mc_getTransactionByHash

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_getTransactionByBlockHashAndIndex","params":["0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b", "0x0"],"id":101}' localhost:8545

Result see mc_getTransactionByHash

mc_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.
params: [
   '0x29c', // 668
   '0x0' // 0
]

Returns

See mc_getTransactionByHash

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_getTransactionByBlockNumberAndIndex","params":["0x29c", "0x0"],"id":101}' localhost:8545

Result see mc_getTransactionByHash

mc_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
params: [
   '0x7bb694c3462764cb113e9b742faaf06adc728e70b607f8b7aa95207ee32b1c5e'
]

Returns

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

  • transactionHash: DATA, 32 Bytes - hash of the transaction.
  • transactionIndex: QUANTITY - integer of the transactions index position in the block.
  • blockHash: DATA, 32 Bytes - hash of the block where this transaction was in.
  • blockNumber: QUANTITY - block number where this transaction was in.
  • cumulativeGasUsed: QUANTITY - The total amount of gas used when this transaction was executed in the block.
  • gasUsed: QUANTITY - The amount of gas used by this specific transaction alone.
  • contractAddress: DATA, 20 Bytes - The contract address created, if the transaction was a contract creation, otherwise null.
  • logs: Array - Array of log objects, which this transaction generated.
  • 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

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_getTransactionReceipt","params":["0x7bb694c3462764cb113e9b742faaf06adc728e70b607f8b7aa95207ee32b1c5e"],"id":101}' localhost:8545

// Result
{
{"jsonrpc":"2.0",
"id":101,
"result":{
"blockHash":"0xad7d2eec610b3e04ea4676c11a3184cb07df43ed7ab717f331d3c952fc1b55cf",
"blockNumber":"0x1b943",
"contractAddress":"0xf2f4eec6c2adfcf780aae828de0b25f86506ffae",
"cumulativeGasUsed":"0x1b337c",
"from":"0x7312f4b8a4457a36827f185325fd6b66a3f8bb8b",
"gasUsed":"0x1b337c",
"logs":[],
"logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
"status":"0x1",
"to":null,
"transactionHash":"0x7bb694c3462764cb113e9b742faaf06adc728e70b607f8b7aa95207ee32b1c5e",
"transactionIndex":"0x1"}
}

mc_getUncleByBlockHashAndIndex

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

Parameters

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

Returns

See mc_getBlockByHash

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_getUncleByBlockHashAndIndex","params":["0x696d389aa9b6b44e08af9f3528c51587aac435b75a54ece42f4b2d1289043497", "0x0"],"id":101}' localhost:8545

Result see mc_getBlockByHash

Note: An uncle doesn't contain individual transactions.

mc_getUncleByBlockNumberAndIndex

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

Parameters

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

Returns

See mc_getBlockByHash

Note: An uncle doesn't contain individual transactions.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_getUncleByBlockNumberAndIndex","params":["0x29c", "0x0"],"id":101}' localhost:8545

Result see mc_getBlockByHash

mc_newFilter

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

*A note on specifying topic filters:*

Topics are order-dependent. A transaction with a log with topics [A, B] will be matched by the following topic filters: * [] "anything" * [A] "A in first position (and anything after)" * [null, B] "anything in first position AND B in second position (and anything after)" * [A, B] "A in first position AND B in second position (and anything after)" * [[A, B], [A, B]] "(A OR B) in first position AND (A OR B) in second position (and anything after)"

Parameters

  1. Object - The filter options:
  • fromBlock: QUANTITY|TAG - (optional, default: "latest") Integer block number, or "latest" for the last mined block or "pending", "earliest" for not yet mined transactions.
  • toBlock: QUANTITY|TAG - (optional, default: "latest") Integer block number, or "latest" for the last mined block or "pending", "earliest" for not yet mined transactions.
  • address: DATA|Array, 20 Bytes - (optional) Contract address or a list of addresses from which logs should originate.
  • topics: Array of DATA, - (optional) Array of 32 Bytes DATA topics. Topics are order-dependent. Each topic can also be an array of DATA with "or" options.
params: [{
  "fromBlock": "0x1",
  "toBlock": "0x2",
  "address": "0x8888f1f195afa192cfee860698584c030f4c9db1",
  "topics": ["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b", null, ["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b", "0x0000000000000000000000000aff3454fce5edbc8cca8697c15331677e6ebccc"]]
}]

Returns

QUANTITY - A filter id.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_newFilter","params":[{"topics":["0x12341234"]}],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0x1" // 1
}

mc_newBlockFilter

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

Parameters

None

Returns

QUANTITY - A filter id.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_newBlockFilter","params":[],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc":  "2.0",
  "result": "0x244afc5c2cb35b24c5b91bba7f7ab19d" // 1
}

mc_newPendingTransactionFilter

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

Parameters

None

Returns

QUANTITY - A filter id.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_newPendingTransactionFilter","params":[],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc":  "2.0",
  "result": "0x1" // 1
}

mc_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 mc_getFilterChanges for a period of time.

Parameters

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

Returns

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

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_uninstallFilter","params":["0xb"],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": true
}

mc_getFilterChanges

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

Parameters

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

Returns

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

  • For filters created with :ref:`mc_newBlockFilter` the return are block hashes (DATA, 32 Bytes), e.g. ["0x3454645634534..."].
  • For filters created with :ref:`mc_newPendingTransactionFilter` the return are transaction hashes (DATA, 32 Bytes), e.g. ["0x6345343454645..."].
  • For filters created with :ref:`mc_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 Bytes DATA of indexed log arguments. (In solidity: The first topic is the hash of the signature of the event (e.g. Deposit(address,bytes32,uint256)), except you declared the event with the anonymous specifier.)

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_getFilterChanges","params":["0x16"],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc":"2.0",
  "result": [{
    "logIndex": "0x1", // 1
    "blockNumber":"0x1b4", // 436
    "blockHash": "0x8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcfdf829c5a142f1fccd7d",
    "transactionHash":  "0xdf829c5a142f1fccd7d8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcf",
    "transactionIndex": "0x0", // 0
    "address": "0x16c5785ac562ff41e2dcfdf829c5a142f1fccd7d",
    "data":"0x0000000000000000000000000000000000000000000000000000000000000000",
    "topics": ["0x59ebeb90bc63057b6515673c3ecf9438e5058bca0f92585014eced636878c9a5"]
    },{
      ...
    }]
}

mc_getFilterLogs

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

Parameters

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

Returns

See mc_getFilterChanges

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_getFilterLogs","params":["0x16"],"id":101}' localhost:8545

Result see mc_getFilterChanges

mc_getLogs

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

Parameters

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

Returns

See mc_getFilterChanges

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_getLogs","params":[{"topics":["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b"]}],"id":101}'

Result see mc_getFilterChanges

mc_getWork

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

Parameters

none

Returns

Array - Array with the following properties:

  1. DATA, 32 Bytes - current block header pow-hash
  2. DATA, 32 Bytes - the seed hash used for the DAG.
  3. DATA, 32 Bytes - the boundary condition ("target"), 2^256 / difficulty.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"mc_getWork","params":[],"id":101}' localhost:8545

// Result
{
"jsonrpc":"2.0",
"id":101,
"result":["0x367ebe7ed77dde0a4cc134adaa769f93a833e08a86a0d38ab18e32cc3740b5f8","0x9b2baad7528ecec612c5751a6bd525905892d7892e155c3b05e61363154a940b","0x0000001dd67ebb66a2c0fc63b9907077f70b5315e1780a8b74f33d40e2a9a7e4"]
}

mc_submitWork

Used for submitting a proof-of-work solution.

Parameters

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

Returns

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

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0", "method":"mc_submitWork", "params":["0x0000000000000001", "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef", "0xD1GE5700000000000000000000000000D1GE5700000000000000000000000000"],"id":101}'

// Result
{
  "id":101,
  "jsonrpc":"2.0",
  "result": true
}

ADMIN

admin_addPeer

The addPeer administrative method requests adding a new remote node to the list of tracked static nodes. The node will try to maintain connectivity to these nodes at all times, reconnecting every once in a while if the remote connection goes down.

The method accepts a single argument, the enode URL of the remote peer to start tracking and returns a BOOL indicating whether the peer was accepted for tracking or some error occurred.

Parameters

string: url, 20 Bytes - address from which the VNODE settings in the vnodeconfig.json file.

Returns

Boolean - returns true if the operation is successfully, otherwise false.

Example

// Request
curl -X POST --data '{"method": "admin_addPeer", "params": ["enode://a979fb575495b8d6db44f750317d0f4622bf4c2aa3365d6af7c284339968eef29b69ad0dce72a4d8db5ebb4968de0e3bec910127f134779fbcb0cb6d3331163c@2.1.188.187:30333"]}' localhost:8545

// Result
true

The datadir administrative property can be queried for the absolute path the running MOAC VNODE node currently uses to store all its databases.

Parameters

none

Returns

string - returns the absolute path running the MOAC VNODE.

Example

// Request
curl -X POST --data '{"method": "admin_datadir", "params": [],"id":106}' localhost:8545

// Result
{"jsonrpc":"2.0","id":101,"result":"/Users/moac/src/github.com/innowells/moac-vnode/test101"}

admin_nodeInfo

The nodeInfo administrative property can be queried for all the information known about the running MOAC VNODE at the networking granularity. These include general information about the node itself as a participant of the ÐΞVp2p P2P overlay protocol, as well as specialized information added by each of the running application protocols.

Parameters

none

Returns

object - returns true if the operation is successfully, otherwise false.

Example

// Request
curl -X POST --data '{"method": "admin_nodeInfo", "params": [],"id":101}' localhost:8545

// Result
{"jsonrpc":"2.0","id":101,"result":{"id":"a6f486af99679e00ec1a2bf77304e8c7f183987c8138a7c515a08ee42c5bebbda9f01474d43ba7176f891989dbdb78a6cbade67a941e6c2d5a83751039adba36","name":"Moac/v1.0.11-rc-2b24668f/darwin-amd64/go1.13.1","enode":"enode://a6f486af99679e00ec1a2bf77304e8c7f183987c8138a7c515a08ee42c5bebbda9f01474d43ba7176f891989dbdb78a6cbade67a941e6c2d5a83751039adba36@71.166.46.131:30336?servicecfgport=:50062\u0026showtopublic=true\u0026beneficialaddress=0xD814F2ac2c4cA49b33066582E4e97EBae02F2aB9\u0026ip=","ip":"71.166.46.131","ports":{"discovery":30336,"listener":30336},"listenAddr":"[::]:30336","protocols":{"mc":{"network":101,"difficulty":1476985363965,"genesis":"0x4e2972df43453f5b658656de1f2af40866b6d86b4e11b0c49eb1fc1a854d9796","head":"0x941bb3a1c9a8a26e0bc2f747c2a7ea805135e1e995464957aa7e09814a1575d7"}}}}

admin_peers

The addPeer administrative method requests adding a new remote node to the list of tracked static nodes. The node will try to maintain connectivity to these nodes at all times, reconnecting every once in a while if the remote connection goes down.

The method accepts a single argument, the enode URL of the remote peer to start tracking and returns a BOOL indicating whether the peer was accepted for tracking or some error occurred.

Parameters

none

Returns

Boolean - returns true if the operation is successfully, otherwise false.

Example

// Request
curl -X POST --data '{"method": "admin_addPeer", "params": ["enode://a979fb575495b8d6db44f750317d0f4622bf4c2aa3365d6af7c284339968eef29b69ad0dce72a4d8db5ebb4968de0e3bec910127f134779fbcb0cb6d3331163c@2.1.188.187:30333"]}' localhost:8545

// Result
true

admin_startRPC

The startRPC administrative method starts an HTTP based JSON RPC API webserver to handle client requests. All the parameters are optional:

host: network interface to open the listener socket on (defaults to "localhost") port: network port to open the listener socket on (defaults to 8545) cors: cross-origin resource sharing header to use (defaults to "") apis: API modules to offer over this interface (defaults to "mc,net,chain3")

Parameters

string: url, 20 Bytes - address from which the VNODE settings in the vnodeconfig.json file.

Returns

Boolean - returns true if the HTTP RPC listener was opened successfully, otherwise false. Please note, only one HTTP endpoint is allowed to be active at any time. So this is a dump method, you can't use it :).

Example

// Request
curl -X POST --data '{"method": "admin_startRPC", "params": ["127.0.0.1",8546], "id":101}' localhost:8545

// Result
{"jsonrpc":"2.0","id":106,"error":{"code":-32000,"message":"HTTP RPC already running on 127.0.0.1:8545"}}

admin_stopRPC

The stopRPC administrative method closes the currently open HTTP RPC endpoint. As the node can only have a single HTTP endpoint running, this method takes no parameters, returning a boolean whether the endpoint was closed or not.

Parameters

none

Returns

Boolean - returns true if the operation is successfully, otherwise false.

Example

// Request
curl -X POST --data '{"method": "admin_stopRPC", }' localhost:8545

// Result
true

admin_addSubnetP2P

The addSubnetP2P is adding the Vnode to subnet's dedicated p2p network as a result, this node can join multiple p2p networks including the mainnet one.

Parameters

string: Address, 20 Bytes - address of the AppChain/SubChain the VNODE need to connect.

number: Block number, the block number that when the Vnode will join the network, suggest to be current blocknumber +100.

Returns

null - returns null if the operation is successfully

Example

// Request
curl -X POST --data '{"method": "admin_addSubnetP2P", "params": ["0xD814F2ac2c4cA49b33066582E4e97EBae02F2aB9",1999], "id":101}' localhost:8545

// Result
null

admin_removeSubnetP2P

The removeSubnetP2P administrative method remove the Vnode from the P2P network of the AppChain.

Parameters

string: Address, 20 Bytes - address of the AppChain/SubChain the VNODE need to connect.

number: Block number, the block number that when the Vnode will join the network, suggest to be current blocknumber +100.

Returns

Boolean - returns true if the operation is successfully, otherwise false.

Example

// Request
curl -X POST --data '{"method": "admin_removeSubnetP2P", "params": ["0xD814F2ac2c4cA49b33066582E4e97EBae02F2aB9",1999], "id":101}' localhost:8545

// Result
true

admin_getSubnetP2PList

List the Subnet P2P network currently joining.

Parameters

none

Returns

array - returns a list of the netowrks.

Example

// Request
curl -X POST --data '{"method": "admin_getSubnetP2PList"}' localhost:8545

// Result
    // Result
{
  "id":101,
  "jsonrpc":"2.0",
  "result": [{
    "blockEnd": "0x1b4", // 436
    "blockStart":"0x1", // 1
    "peers": "0",
    "subnet": "0x16c5785ac562ff41e2dcfdf829c5a142f1fccd7d"
    },{
      ...
    }]
}

TXPOOL

txpool_content

The content inspection property can be queried to list the exact details of all the transactions currently pending for inclusion in the next block(s), as well as the ones that are being scheduled for future execution only.

The result is an object with two fields pending and queued. Each of these fields are associative arrays, in which each entry maps an origin-address to a batch of scheduled transactions. These batches themselves are maps associating nonces with actual transactions.

Please note, there may be multiple transactions associated with the same account and nonce. This can happen if the user broadcast mutliple ones with varying gas allowances (or even complerely different transactions).

Parameters

none

Returns

result: Object with two fields pending and queued. Each of these fields are associative arrays, in which each entry maps an origin-address to a batch of scheduled transactions. These batches themselves are maps associating nonces with actual transactions.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"txpool_content","params":[],"id":106}' localhost:8545

// Result
{
"jsonrpc":"2.0",
"id":101,
"result":{"pending":{"0xf6a36118751C50F8932d31d6d092B11Cc28f2258":{"349":{"blockHash":"0x0000000000000000000000000000000000000000000000000000000000000000","blockNumber":null,"from":"0xf6a36118751c50f8932d31d6d092b11cc28f2258","gas":"0x1e8480","gasPrice":"0x4a817c800","hash":"0xdf81d14a6857549d11a82aba6471874af6410e04e73eac003161fabc9220f953","input":"0x6bbded70","nonce":"0x15d","syscnt":"0x0","to":"0x7097302333beef4813eef53d12dff987241e3c3c","transactionIndex":"0x0","value":"0xde0b6b3a7640000","v":"0xf8","r":"0xfbafb9051495c3b8f8626bb50f0b17b1bf4d611ce12403940765a74e0f2c96e2","s":"0x4c8d2b5f6dc014edfed908c8ca5149bd7dd4270753b44edc55f1693aff589866","shardingFlag":"0x0"}}},"queued":{}}
}

txpool_status

The status inspection property can be queried for the number of transactions currently pending for inclusion in the next block(s), as well as the ones that are being scheduled for future execution only.

The result is an object with two fields pending and queued, each of which is a counter representing the number of transactions in that particular state.

Parameters

none

Returns

result: Object with two fields pending and queued. Each of which is a counter representing the number of transactions in that particular state.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"txpool_status","params":[],"id":106}' localhost:8545

// Result
{
"jsonrpc":"2.0",
"id":101,
"result":{"pending":"0x1","queued":"0x0"}
}

txpool_inspect

The inspect inspection property can be queried to list a textual summary of all the transactions currently pending for inclusion in the next block(s), as well as the ones that are being scheduled for future execution only. This is a method specifically tailored to developers to quickly see the transactions in the pool and find any potential issues.

The result is an object with two fields pending and queued. Each of these fields are associative arrays, in which each entry maps an origin-address to a batch of scheduled transactions. These batches themselves are maps associating nonces with transactions summary strings.

Please note, there may be multiple transactions associated with the same account and nonce. This can happen if the user broadcast mutliple ones with varying gas allowances (or even complerely different transactions).

Parameters

none

Returns

result: Object with two fields pending and queued. Each of these fields are associative arrays, in which each entry maps an origin-address to a batch of scheduled transactions. These batches themselves are maps associating nonces with transactions summary strings.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"txpool_inspect","params":[],"id":106}' localhost:8545

// Result
{
"jsonrpc":"2.0",
"id":101,
"result":{"pending":{"0xf6a36118751C50F8932d31d6d092B11Cc28f2258":{"349":"0x7097302333Beef4813EEf53d12dfF987241E3C3C: 1000000000000000000 sha + 2000000 × 20000000000 gas"}},"queued":{}
}

VNODE

vnode_address

Returns the VNODE benificial address. This is needed for SCS to use in the communication.

Parameters

none

Returns

address: DATA, 20 Bytes - address from which the VNODE settings in the vnodeconfig.json file.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"vnode_address","params":[],"id":101}' localhost:8545

// Result
{
"jsonrpc":"2.0",
"id":101,
"result":"0xa8863fc8ce3816411378685223c03daae9770ebb"
}

vnode_scsService

Returns if the VNODE enable the service for SCS servers.

Parameters

none

Returns

Bool - true, enable the SCS service; false, not open.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"vnode_scsService","params":[],"id":101}' 'localhost:8545'

// Result
{
  "jsonrpc":"2.0",
  "id":101,
  "result":true
}

vnode_serviceCfg

Returns the VNODE SCS service ports for connecting with.

Parameters

none

Returns

String - The current service port set in the vnodeconfig.json.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"vnode_serviceCfg","params":[],"id":101}' 'localhost:8545'

// Result
{
  "jsonrpc":"2.0",
  "id":101,
  "result":":50062"
}

vnode_showToPublic

Returns if the VNODE enable the public view.

Parameters

none

Returns

Bool - true, open to the public; false, not open.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"vnode_showToPublic","params":[],"id":101}' 'localhost:8545'

// Result
{
  "jsonrpc":"2.0",
  "id":101,
  "result":true
}

vnode_vnodeIP

Returns VNODE IP for users to access. Note for cloud servers, this could be different from the cloud server IP.

Parameters

none

Returns

String - The current IP that can be used to access. This is set in the vnodeconfig.json.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"vnode_vnodeIP","params":[],"id":101}' 'localhost:8545'

// Result
{
  "jsonrpc":"2.0",
  "id":101,
  "result":"127.0.0.1"
}

SCS

scs_directCall

Executes a new constant call of the MicroChain Dapp function without creating a transaction on the MicroChain. This RPC call is used by API/lib to call MicroChain Dapp functions.

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. This

parameter is the MicroChain address. - data: DATA - (optional) Hash of the method signature and encoded parameters. For details see Ethereum Contract ABI <https://github.com/ethereum/wiki/wiki/Ethereum-Contract-ABI>

Returns

DATA - the return value of executed Dapp constant function call.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"scs_directCall","params":[{see above}],"id":101}' localhost:8545

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0x"
}

scs_getBlock

Returns information about a block on the MicroChain by block number.

Parameters

  1. String - the address of the MicroChain that Dapp is on.
  2. QUANTITY|TAG - integer of a block number, or the string "earliest" or "latest", as in the default block parameter <#the-default-block-parameter>. Note, scs_getBlock does not support "pending".

Returns

DATA - Data in the block on the MicroChain.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"scs_getBlock","params":["0x9d711986ccc8c89db2dfaf0894acadeb5a383ee8","0x1"],"id":101}' localhost:8548

// Result
{"jsonrpc":"2.0","id":101,"result":{"extraData":"0x","hash":"0xc80cbe08bc266b1236f22a8d0b310faae3135961dbef6ad8b6ad4e8cd9537309","number":"0x1","parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","stateRoot":"0x1a065207da60d8e7a44db2f3b5ed9d3e81052a3059e4108c84701d0bf6a62292","timestamp":"0x0","transactions":[],"transactionsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"}}

scs_getBlockList

Returns information about multiple MicroChain blocks by block number.

Parameters

  1. String - the address of the MicroChain that Dapp is on.
  2. QUANTITY - integer of the start block number.
  3. QUANTITY - integer of the end block number, need to be larger or equal the start block number.

Returns

ARRAY - Array of the block infromation on the MicroChain.

Example

// Request
curl -X POST --data curl -X POST --data '{"jsonrpc":"2.0","method":"scs_getBlock","params":["0x9d711986ccc8c89db2dfaf0894acadeb5a383ee8","0x370", "0x373"],"id":101}' localhost:8548

// Result
{"jsonrpc":"2.0","id":101,"result":{"blockList":[{"extraData":"0x","hash":"0x56075838e0fffe6576add14783b957239d4f3c57989bc3a7b7728a3b57eb305a","miner":"0xecd1e094ee13d0b47b72f5c940c17bd0c7630326","number":"0x370","parentHash":"0x56352a3a8bd0901608041115817204cbce943606e406d233d7d0359f449bd4c2","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","stateRoot":"0xde741a2f6b4a3c865e8f6fc9ba11eadaa1fa04c61d660bcdf0fa1195029699f6","timestamp":"0x5bfb7c1c","transactions":[],"transactionsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"},{"extraData":"0x","hash":"0xbc3f5791ec039cba99c37310a4f30a68030dd2ab79efb47d23fd9ac5343f54e5","miner":"0xecd1e094ee13d0b47b72f5c940c17bd0c7630326","number":"0x371","parentHash":"0x56075838e0fffe6576add14783b957239d4f3c57989bc3a7b7728a3b57eb305a","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","stateRoot":"0xde741a2f6b4a3c865e8f6fc9ba11eadaa1fa04c61d660bcdf0fa1195029699f6","timestamp":"0x5bfb7c3a","transactions":[],"transactionsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"},{"extraData":"0x","hash":"0x601be17c47cb4684053457d1d5f70a6dbeb853b27cda08d160555f857f2da33b","miner":"0xecd1e094ee13d0b47b72f5c940c17bd0c7630326","number":"0x372","parentHash":"0xbc3f5791ec039cba99c37310a4f30a68030dd2ab79efb47d23fd9ac5343f54e5","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","stateRoot":"0xde741a2f6b4a3c865e8f6fc9ba11eadaa1fa04c61d660bcdf0fa1195029699f6","timestamp":"0x5bfb7c58","transactions":[],"transactionsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"},{"extraData":"0x","hash":"0x8a0bea649bcdbd2b525690ff485e56d5a83443e9013fcdccd1a0adee56ba4092","miner":"0xecd1e094ee13d0b47b72f5c940c17bd0c7630326","number":"0x373","parentHash":"0x601be17c47cb4684053457d1d5f70a6dbeb853b27cda08d160555f857f2da33b","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","stateRoot":"0xde741a2f6b4a3c865e8f6fc9ba11eadaa1fa04c61d660bcdf0fa1195029699f6","timestamp":"0x5bfb7c76","transactions":[],"transactionsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"}],"endBlk":"0x373","microchainAddress":"0x7D0CbA876cB9Da5fa310A54d29F4687f5dd93fD7","startBlk":"0x370"}}

scs_getBlockNumber

Returns the number of most recent block .

Parameters

  1. String - the address of the MicroChain that Dapp is on.

Returns

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

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"scs_getBlockNumber","params":["0x9d711986ccc8c89db2dfaf0894acadeb5a383ee8"],"id":101}' 'localhost:8545'

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0x4b7" // 1207
}

scs_getDappList

Returns the Dapp addresses on the MicroChain. For nuwa 1.0.8 and later version only,

Parameters

  1. String - the address of the MicroChain that has Dapps.

Returns

ARRAY - Array of the DAPP addresses on the MicroChain.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"scs_getDappList","params":[],"id":101}' 'localhost:8545'

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": ["0x9d711986ccc8c89db2dfaf0894acadeb5a383ee8","0x7cfd775c7a97aa632846eff35dcf9dbcf502d0f3"]
}

scs_getDappState

Returns the Dapp state on the MicroChain.

Parameters

  1. String - the address of the MicroChain that Dapp is on.

Returns

QUANTITY - 0, no DAPP is deployed on the MicroChain; 1, DAPP is deployed on the MicroChain.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"scs_getDappState","params":["0x9d711986ccc8c89db2dfaf0894acadeb5a383ee8"],"id":101}' 'localhost:8545'

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": 1
}

scs_getMicroChainInfo

Returns the requested MicroChain information on the connecting SCS. This information is the same as the information defined in the MicroChain contract.

Parameters

  1. String - the address of the MicroChain on the SCS.

Returns

Object A Micro Chain information object as defined in the MicroChain contract:

  • balance: Number - the native token amount in the MicroChain.
  • blockReward: Number - the reward amount at each block for the MicroChain, unit is in Sha = 1e-18 moac.
  • bondLimit: Number - the token amount needed as deposit in the MicroChain, unit is in Sha = 1e-18 moac.
  • owner: String, 20 Bytes - the address of the beneficiary to whom the mining rewards were given.
  • scsList: Array, List of SCS addresses, 20 Bytes each - the address of the SCS to whom the mining rewards were given.
  • txReward: Number - the reward provided to the TX for the MicroChain, unit is in Sha = 1e-18 moac.
  • viaReward: Number - the reward provided to the VNODE proxy for the MicroChain, unit is in Sha = 1e-18 moac.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"scs_getMicroChainInfo","params":[],"id":101}' 'localhost:8545'

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": {"balance":"0x0","blockReward":"0x1c6bf52634000","bondLimit":"0xde0b6b3a7640000","owner":"0xa8863fc8Ce3816411378685223C03DAae9770ebB","scsList":["0xECd1e094Ee13d0B47b72F5c940C17bD0c7630326","0x50C15fafb95968132d1a6ee3617E99cCa1FCF059","0x1b65cE1A393FFd5960D2ce11E7fd6fDB9e991945"],"txReward":"0x174876e800","viaReward":"0x9184e72a000"}
}

scs_getMicroChainList

Returns the list of MicroChains on the SCS that is connecting with.

Parameters

None

Returns

Array - A list of Micro Chain addresses on the SCS.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"scs_getMicroChainList","params":[],"id":101}' 'localhost:8545'

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": ["0x9d711986ccc8c89db2dfaf0894acadeb5a383ee8","0x7cfd775c7a97aa632846eff35dcf9dbcf502d0f3"]
}

scs_getNonce

Returns the account nonce on the MicroChain.

Parameters

  1. String - the address of the MicroChain that Dapp is on.
  2. String - the address of the accountn.

Returns

QUANTITY integer of the number of transactions send from this address on the MicroChain;

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"scs_getNonce","params":["0x9d711986ccc8c89db2dfaf0894acadeb5a383ee8", "0x7312F4B8A4457a36827f185325Fd6B66a3f8BB8B"],"id":101}' 'localhost:8545'

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": 1
}

scs_getSCSId

Returns the SCS id.

Parameters

None

Returns

String - SCS id in the scskeystore directory, used for SCS identification to send deposit and receive MicroChain mining rewards.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"scs_getSCSId","params":[],"id":101}' 'localhost:8545'

// Result
{
  "id":101,
  "jsonrpc": "2.0",
  "result": "0x9d711986ccc8c89db2dfaf0894acadeb5a383ee8"
}

scs_getReceiptByHash

Returns the receipt of a transaction by transaction hash. Note That the receipt is not available for pending transactions.

Parameters

  1. String - The MicroChain address.
  2. String - The transaction hash.

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.
  • contractAddress: DATA, 20 Bytes - The contract address created, if the transaction was a contract creation, otherwise null.
  • logs: Array - Array of log objects, which this transaction generated.
  • logsBloom: DATA, 256 Bytes - Bloom filter for light clients to quickly retrieve related logs.
  • failed: Boolean - true if the filter was successfully uninstalled,

otherwise false. - status: QUANTITY either 1 (success) or 0 (failure)

Example

  // Request
  curl -X POST --data '{"jsonrpc":"2.0","method":"scs_getReceiptByHash","params":["0x299afff2da4a57e7e0a0a16bf626f8822b8a3158","0x67bfaa5a704e77a31d5e7eb866f8c662fa8313a7882d13d0d23e377cd66d2a69"],"id":101}' 'localhost:8545'

  // Result
  {
    "id":101,
    "jsonrpc": "2.0",
    "result": {contractAddress: '0x0a674edac2ccd47ae2a3197ea3163aa81087fbd1',
failed: false,"logs":[{"address":"0x2328537bc943ab1a89fe94a4b562ee7a7b013634","topics":["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef","0x000000000000000000000000a8863fc8ce3816411378685223c03daae9770ebb","0x0000000000000000000000007312f4b8a4457a36827f185325fd6b66a3f8bb8b"],"data":"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGQ=","blockNumber":0,"transactionHash":"0x67bfaa5a704e77a31d5e7eb866f8c662fa8313a7882d13d0d23e377cd66d2a69","transactionIndex":0,"blockHash":"0x78f092ca81a891ad6c467caa2881d00d8e19c8925ddfd71d793294fbfc5f15fe","logIndex":0,"removed":false}],"logsBloom":"0x00000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008000000000008000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000800000000000080000000000000000000000000002000000000000000000000000000000000000080100002000000000000000000000000000000000000000000000000000000000000000000000000000","status":"0x1","transactionHash":"0x67bfaa5a704e77a31d5e7eb866f8c662fa8313a7882d13d0d23e377cd66d2a69"}
  }

scs_getReceiptByNonce

Returns the transaction result by address and nonce on the MicroChain. Note That the nonce is the nonce on the MicroChain. This nonce can be checked using scs_getNonce.

Parameters

1. String - The MicroChain address. 1. String - The transaction nonce. 1. QUANTITY - The nonce of the transaction.

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.
  • contractAddress: DATA, 20 Bytes - The contract address created, if the transaction was a contract creation, otherwise null.
  • logs: Array - Array of log objects, which this transaction generated.
  • logsBloom: DATA, 256 Bytes - Bloom filter for light clients to quickly retrieve related logs.
  • failed: Boolean - true if the filter was successfully uninstalled,

otherwise false. - status: QUANTITY either 1 (success) or 0 (failure)

Example

  // Request
  curl -X POST --data '{"jsonrpc":"2.0","method":"scs_getReceiptByNonce","params":["0x299afff2da4a57e7e0a0a16bf626f8822b8a3158","0xa8863fc8ce3816411378685223c03daae9770ebb", 0],"id":101}' 'localhost:8545'

  // Result
  {
    "id":101,
    "jsonrpc": "2.0",
    "result": {contractAddress: '0x0a674edac2ccd47ae2a3197ea3163aa81087fbd1',
failed: false,"logs":[{"address":"0x2328537bc943ab1a89fe94a4b562ee7a7b013634","topics":["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef","0x000000000000000000000000a8863fc8ce3816411378685223c03daae9770ebb","0x0000000000000000000000007312f4b8a4457a36827f185325fd6b66a3f8bb8b"],"data":"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGQ=","blockNumber":0,"transactionHash":"0x67bfaa5a704e77a31d5e7eb866f8c662fa8313a7882d13d0d23e377cd66d2a69","transactionIndex":0,"blockHash":"0x78f092ca81a891ad6c467caa2881d00d8e19c8925ddfd71d793294fbfc5f15fe","logIndex":0,"removed":false}],"logsBloom":"0x00000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008000000000008000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000800000000000080000000000000000000000000002000000000000000000000000000000000000080100002000000000000000000000000000000000000000000000000000000000000000000000000000","status":"0x1","transactionHash":"0x67bfaa5a704e77a31d5e7eb866f8c662fa8313a7882d13d0d23e377cd66d2a69"}
  }

scs_getTransactionByHash

Returns the receipt of a transaction by transaction hash. Note That the receipt is not available for pending transactions.

Parameters

  1. String - The MicroChain address.
  2. String - The transaction hash.

Returns

Object - A transaction object, or null when no transaction 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.
  • contractAddress: DATA, 20 Bytes - The contract address created, if the transaction was a contract creation, otherwise null.
  • logs: Array - Array of log objects, which this transaction generated.
  • logsBloom: DATA, 256 Bytes - Bloom filter for light clients to quickly retrieve related logs.
  • failed: Boolean - true if the filter was successfully uninstalled,

otherwise false. - status: QUANTITY either 1 (success) or 0 (failure)

Example

  // Request
  curl -X POST --data '{"jsonrpc":"2.0","method":"scs_getTransactionByHash","params":["0x299afff2da4a57e7e0a0a16bf626f8822b8a3158","0x67bfaa5a704e77a31d5e7eb866f8c662fa8313a7882d13d0d23e377cd66d2a69"],"id":101}' 'localhost:8545'

  // Result
  {
    "id":101,
    "jsonrpc": "2.0",
    "result": {contractAddress: '0x0a674edac2ccd47ae2a3197ea3163aa81087fbd1',
failed: false,"logs":[{"address":"0x2328537bc943ab1a89fe94a4b562ee7a7b013634","topics":["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef","0x000000000000000000000000a8863fc8ce3816411378685223c03daae9770ebb","0x0000000000000000000000007312f4b8a4457a36827f185325fd6b66a3f8bb8b"],"data":"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGQ=","blockNumber":0,"transactionHash":"0x67bfaa5a704e77a31d5e7eb866f8c662fa8313a7882d13d0d23e377cd66d2a69","transactionIndex":0,"blockHash":"0x78f092ca81a891ad6c467caa2881d00d8e19c8925ddfd71d793294fbfc5f15fe","logIndex":0,"removed":false}],"logsBloom":"0x00000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008000000000008000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000800000000000080000000000000000000000000002000000000000000000000000000000000000080100002000000000000000000000000000000000000000000000000000000000000000000000000000","status":"0x1","transactionHash":"0x67bfaa5a704e77a31d5e7eb866f8c662fa8313a7882d13d0d23e377cd66d2a69"}
  }

scs_getTransactionByNonce

Returns the receipt of a transaction by transaction hash. Note That the receipt is not available for pending transactions.

Parameters

1. String - The MicroChain address. 1. String - The transaction nonce. 1. QUANTITY - The nonce of the transaction.

Returns

Object - A transaction object, or null when no transaction 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.
  • contractAddress: DATA, 20 Bytes - The contract address created, if the transaction was a contract creation, otherwise null.
  • logs: Array - Array of log objects, which this transaction generated.
  • logsBloom: DATA, 256 Bytes - Bloom filter for light clients to quickly retrieve related logs.
  • failed: Boolean - true if the filter was successfully uninstalled,

otherwise false. - status: QUANTITY either 1 (success) or 0 (failure)

Example

  // Request
  curl -X POST --data '{"jsonrpc":"2.0","method":"scs_getTransactionByNonce","params":["0x299afff2da4a57e7e0a0a16bf626f8822b8a3158","0x67bfaa5a704e77a31d5e7eb866f8c662fa8313a7882d13d0d23e377cd66d2a69"],"id":101}' 'localhost:8545'

  // Result
  {
    "id":101,
    "jsonrpc": "2.0",
    "result": {contractAddress: '0x0a674edac2ccd47ae2a3197ea3163aa81087fbd1',
failed: false,"logs":[{"address":"0x2328537bc943ab1a89fe94a4b562ee7a7b013634","topics":["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef","0x000000000000000000000000a8863fc8ce3816411378685223c03daae9770ebb","0x0000000000000000000000007312f4b8a4457a36827f185325fd6b66a3f8bb8b"],"data":"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGQ=","blockNumber":0,"transactionHash":"0x67bfaa5a704e77a31d5e7eb866f8c662fa8313a7882d13d0d23e377cd66d2a69","transactionIndex":0,"blockHash":"0x78f092ca81a891ad6c467caa2881d00d8e19c8925ddfd71d793294fbfc5f15fe","logIndex":0,"removed":false}],"logsBloom":"0x00000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008000000000008000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000800000000000080000000000000000000000000002000000000000000000000000000000000000080100002000000000000000000000000000000000000000000000000000000000000000000000000000","status":"0x1","transactionHash":"0x67bfaa5a704e77a31d5e7eb866f8c662fa8313a7882d13d0d23e377cd66d2a69"}

scs_getExchangeByAddress

Returns the Withdraw/Deposit exchange records between MicroChain and MotherChain for a certain address. This command returns both the ongoing exchanges and processed exchanges. To check all the ongoing exchanges, please use scs_getExchangeInfo.

Parameters

1. String - The MicroChain address. 1. String - The address to be checked. 1. Int - Index of Deposit records >= 0. 1. Int - Number of Deposit records extracted. 1. Int - Index of Depositing records >= 0. 1. Int - Number of Depositing records extracted. 1. Int - Index of Withdraw records >= 0. 1. Int - Number of Withdraw records extracted. 1. Int - Index of Withdrawing records >= 0. 1. Int - Number of Withdrawing records extracted.

Returns

Object - A JSON format object contains the token exchange info.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"scs_getExchangeByAddress","params":["0x2e4694875de2a7da9c3186a176c52760d58694e4","0xa8863fc8ce3816411378685223c03daae9770ebb", 0,10,0,10,0,10,0,10],"id":100}' localhost:8548

// Result
{"jsonrpc":"2.0","id":100,"result":{"DepositRecordCount":2,"DepositRecords":[null,null,{"DepositAmt":"0x18abedda5a37000","Deposittime":"0x5c7f03c4"},{"DepositAmt":"0x2bdbb64bc09000","Deposittime":"0x5c7e8aaa"}],"DepositingRecordCount":0,"DepositingRecords":null,"WithdrawRecordCount":0,"WithdrawRecords":null,"WithdrawingRecordCount":0,"WithdrawingRecords":null,"microchain":"0x2e4694875de2a7da9c3186a176c52760d58694e4","sender":"0xa8863fc8ce3816411378685223c03daae9770ebb"}}

scs_getExchangeInfo

Returns the Withdraw/Deposit exchange records between MicroChain and MotherChain for a certain address. This command returns both the ongoing exchanges and processed exchanges. To check all the ongoing exchanges, please use scs_getExchangeInfo.

Parameters

1. String - The MicroChain address. 1. String - The transaction hash. 1. Int - Index of Depositing records >= 0. 1. Int - Number of Depositing records extracted. 1. Int - Index of Withdrawing records >= 0. 1. Int - Number of Withdrawing records extracted.

Returns

Object - A JSON format object contains the token exchange info.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"scs_getExchangeInfo","params":["0x2e4694875de2a7da9c3186a176c52760d58694e4",0,10,0,10],"id":101}' 'localhost:8548'

// Result

{"jsonrpc":"2.0","id":100,"result":{"DepositingRecordCount":0,"DepositingRecords":null,"WithdrawingRecordCount":0,"WithdrawingRecords":null,"microchain":"0x2e4694875de2a7da9c3186a176c52760d58694e4","scsid":"0x50c15fafb95968132d1a6ee3617e99cca1fcf059"}}

scs_getTxpool

Returns the ongoing transactions in the MicroChain.

Parameters

  1. String - The MicroChain address.

Returns

Object - A JSON format object contains two fields pending and queued. Each of these fields are associative arrays, in which each entry maps an origin-address to a batch of scheduled transactions. These batches themselves are maps associating nonces with actual transactions.

Example

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"scs_getTxpool","params":["0x25b0102b5826efa7ac469782f54f40ffa72154f5"],"id":101}' 'localhost:8548'

// Result

{"jsonrpc":"2.0","id":100,"result":{"pending":{},"queued":{}}}
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