Chain3 JavaScript 软件库 0.1.x

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2023-12-01

Chain3 JavaScript 软件库是MOAC开发的一套javascript库，目的是让应用程序能够使用简便的方式与MOAC节点进行通信。注意，这里有两层，moac启动了一个MOAC母链节点，console参数开启了一个javascript的控制台，这个控制台注入了chain3.js这个库，以使我们可以通过chain3对象与MOAC节点的JSON-RPC接口做交互。

目前Chain3的JavaScript 软件库有两个版本，分别参考以太坊的web3 0.20 和 1.0版本。这里面讲解的是基于0.20版本完成的Chain3，最新版本号是0.1.22。

开发者可以通过``chain3``对象来对DApp的函数进行调用。chain3 通过 RPC calls 来和母链服务器 VNODE. 但注意要求连接的 SCS 服务器打开 RPC 接口：

./scsserver --rpc --rpcport 8548

chain3 还提供了和应用链客户端 SCS 交互的对象 scs，本文档中进行了接口的说明，更多的例子可以在源文件中的example下找到： here.

使用回调函数（CALLBACK）

默认的API调用方式是HTTP端口的同步调用，如果需要进行异步调用，可以把异步调用的函数作为callback的参数传入，可以参考 error first callback style:

chain3.mc.getBlock(48, function(error, result){
    if(!error)
        console.log(result)
    else
        console.error(error);
})

SCS

用户可以使用 chain3 中的 SCS 对象与应用链节点的JSON-RPC接口进行通信的。与母链节点一样，需要SCS节点打开RPC接口：

./scsserver --rpc

在调用时，也需要初始化chain3对象：

var Chain3 = require('chain3');
var chain3 = new Chain3();

//Create a chain3 object to link with SCS
//Setup the SCS monitor with JSON 2.0 commands
chain3.setScsProvider(new chain3.providers.HttpProvider('http://localhost:8548'));

// Check if the SCS RPC is connected

scs_directCall

执行应用链上的合约调用（constant call），仅能查询合约变量状态，不改变合约状态。

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 AppChain 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

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

Example

// Request
// Prepare the data for the contract call
var payload = {
to: "0xecd1e094ee13d0b47b72f5c940c17bd0c7630326",
data: "0xc6888fa10000000000000000000000000000000000000000000000000000000000000003"
}

var output = this._scs.directCall(payload, defaultBlock);

// Result
console.log(output); // "0x0000000000000000000000000000000000000000000000000000000000000015"

chain3.scs.getBalance

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

Parameters

String - the address of the AppChain.
String - the address of the account.

Returns

Object - A big number object:

number: Number - the block number. null when its pending block.
hash: String, 32 Bytes - hash of the block. null when its pending block.
parentHash: String, 32 Bytes - hash of the parent block.
nonce: String, 8 Bytes - hash of the generated proof-of-work. null when its pending block.
transactionsRoot: String, 32 Bytes - the root of the transaction trie of the block
stateRoot: String, 32 Bytes - the root of the final state trie of the block.
miner: String, 20 Bytes - the address of the beneficiary to whom the mining rewards were given.
extraData: String - the "extra data" field of this block.
timestamp: Number - 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.

Example

// Request
var mclist = chain3.scs.getAppChainList();
mcAddress = mclist[0];
console.log("Account balance:", chain3.scs.getBalance(mcAddress, coinbase));

// Result is a bigNubmer object, can be convert to other format
SCS balance: BigNumber { s: 1, e: 0, c: [ 0 ] }
{"extraData":"0x","hash":"0xc80cbe08bc266b1236f22a8d0b310faae3135961dbef6ad8b6ad4e8cd9537309","number":"0x1","parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","stateRoot":"0x1a065207da60d8e7a44db2f3b5ed9d3e81052a3059e4108c84701d0bf6a62292","timestamp":"0x0","transactions":[],"transactionsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"}

chain3.scs.getBlock

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

Parameters

String - the address of the AppChain that Dapp is on.
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

Object - The AppChain block object:

number: Number - the block number. null when its pending block.
hash: String, 32 Bytes - hash of the block. null when its pending block.
parentHash: String, 32 Bytes - hash of the parent block.
nonce: String, 8 Bytes - hash of the generated proof-of-work. null when its pending block.
transactionsRoot: String, 32 Bytes - the root of the transaction trie of the block
stateRoot: String, 32 Bytes - the root of the final state trie of the block.
miner: String, 20 Bytes - the address of the beneficiary to whom the mining rewards were given.
extraData: String - the "extra data" field of this block.
timestamp: Number - 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.

Example

// Request
var mclist = chain3.scs.getAppChainList();
mcAddress = mclist[0];
console.log("SCS block:", chain3.scs.getBlock(mcAddress, 1));

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

chain3.scs.getBlockList

Returns information about multiple AppChain blocks by block number.

Parameters

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

Returns

Object - The AppChain blockList object:

blockList: ARRAY, Array of the AppChain block objects.

Example

// Request
var mclist = chain3.scs.getAppChainList(); //find the AppChain on the SCS
mcAddress = mclist[0]; //locate the 1st AppChain
console.log("SCS blockList 1 - 3:", chain3.scs.getBlockList(mcAddress, 1, 3));

// 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"}}

chain3.scs.getBlockNumber

Returns the number of most recent block .

Parameters

String - the address of the AppChain that Dapp is on.

Returns

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

Example

// Request
var mclist = chain3.scs.getAppChainList(); //find the AppChain on the SCS
mcAddress = mclist[0]; //locate the 1st AppChain
console.log("SCS blockNumber:", chain3.scs.getBlockNumber(mcAddress));

// Result
SCS block number: 903

chain3.scs.getDappList

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

Parameters

String - the address of the AppChain that has Dapps.

Returns

ARRAY - Array of the DAPP addresses on the AppChain.

Example

// Request
var mclist = chain3.scs.getAppChainList(); //find the AppChain on the SCS
mcAddress = mclist[0]; //locate the 1st AppChain
console.log("SCS dapp:", chain3.scs.getDappAddrList(mcAddress));

// Result
SCS dapp: [ '0xa6e4e429e48d97a3dd4309d96cabc836f3bb4283' ]

chain3.scs.getDappState

Returns the Dapp state on the AppChain.

Parameters

String - the address of the AppChain that Dapp is on.

Returns

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

Example

// Request
var mclist = chain3.scs.getAppChainList(); //find the AppChain on the SCS
mcAddress = mclist[0]; //locate the 1st AppChain
console.log("SCS state:", chain3.scs.getDappState(mcAddress));

// Result
SCS state: 1

chain3.scs.getAppChainInfo

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

Parameters

String - the address of the AppChain on the SCS.

Returns

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

balance: Number - the native token amount in the AppChain.
blockReward: Number - the reward amount at each block for the AppChain, unit is in Sha = 1e-18 moac.
bondLimit: Number - the token amount needed as deposit in the AppChain, 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 AppChain, unit is in Sha = 1e-18 moac.
viaReward: Number - the reward provided to the VNODE proxy for the AppChain, unit is in Sha = 1e-18 moac.

Example

// Request
var mclist = chain3.scs.getAppChainList(); //find the AppChain on the SCS
mcAddress = mclist[0]; //locate the 1st AppChain
console.log("MC info:", chain3.scs.getAppChainInfo(mcAddress));

// Result
MC info: {"balance":"0x0","blockReward":"0x1c6bf52634000","bondLimit":"0xde0b6b3a7640000","owner":"0xa8863fc8Ce3816411378685223C03DAae9770ebB","scsList":["0xECd1e094Ee13d0B47b72F5c940C17bD0c7630326","0x50C15fafb95968132d1a6ee3617E99cCa1FCF059","0x1b65cE1A393FFd5960D2ce11E7fd6fDB9e991945"],"txReward":"0x174876e800","viaReward":"0x9184e72a000"}

chain3.scs.getAppChainList

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

Parameters

None

Returns

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

Example

// Request
var mclist = chain3.scs.getAppChainList(); //find the AppChain on the SCS
console.log("SCS AppChain List:", mclist);


// Result
SCS AppChain List: [ '0x25b0102b5826efa7ac469782f54f40ffa72154f5', '0x7cfd775c7a97aa632846eff35dcf9dbcf502d0f3' ]

chain3.scs.getNonce

Returns the account nonce on the AppChain.

Parameters

String - the address of the AppChain.
String - the address of the account.

Returns

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

Example

// Request
var mclist = chain3.scs.getAppChainList(); //find the AppChain on the SCS
mcAddress = mclist[0]; //locate the 1st AppChain
tAddress="0xf6a36118751c50f8932d31d6d092b11cc28f2258";
console.log("SCS nonce of:", tAddress, " is ", chain3.scs.getNonce(mcAddress,tAddress));

// Result
SCS nonce of: 0xf6a36118751c50f8932d31d6d092b11cc28f2258  is  3

chain3.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 AppChain mining rewards.

Example

// Request
console.log("SCS ID:", chain3.scs.getSCSId());

// Result
SCS ID: 0xecd1e094ee13d0b47b72f5c940c17bd0c7630326

chain3.scs.getReceiptByHash

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

Parameters

String - The AppChain address.
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
  var mclist = chain3.scs.getAppChainList(); //find the AppChain on the SCS
  mcAddress = mclist[0]; //locate the 1st AppChain
  txhash1="0x688456221f7729f5c2c17006bbe4df163d09bea70c1a1ebb66b9b53ca10563df";
  console.log("TX Receipt:", chain3.scs.getReceiptByHash(mcAddress, txhash1));

  // 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"}
  }

chain3.scs.getReceiptByNonce

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

Parameters

String - The AppChain address.
String - The transaction nonce.
QUANTITY - The nonce of the transaction.

Returns

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

Example

  // Request
  var mclist = chain3.scs.getAppChainList(); //find the AppChain on the SCS
  mcAddress = mclist[0]; //locate the 1st AppChain
  tAddress="0xf6a36118751c50f8932d31d6d092b11cc28f2258";
  console.log("SCS receipt:", chain3.scs.getReceiptByNonce(mcAddress, tAddress, 0));

  // Result
  SCS receipt: {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"}

chain3.scs.getTransactionByHash

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

Parameters

String - The AppChain address.
String - The transaction hash.

Returns

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

Example

  // Request
  var mclist = chain3.scs.getAppChainList(); //find the AppChain on the SCS
  mcAddress = mclist[0]; //locate the 1st AppChain
  txhash1="0x67bfaa5a704e77a31d5e7eb866f8c662fa8313a7882d13d0d23e377cd66d2a69";
  console.log("TX by hash:", chain3.scs.getTransactionByHash(mcAddress, txhash1));

  // Result
  TX by hash: {
    "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"}
  }

chain3.scs.getTransactionByNonce

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

Parameters

String - The AppChain address.
String - The transaction nonce.
QUANTITY - The nonce of the transaction.

Returns

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

Example

  // Request
  var mclist = chain3.scs.getAppChainList(); //find the AppChain on the SCS
  mcAddress = mclist[0]; //locate the 1st AppChain
  tAddress="0xf6a36118751c50f8932d31d6d092b11cc28f2258";
  console.log("SCS TX:", chain3.scs.getTransactionByNonce(mcAddress, tAddress, 0));


  // Result
  SCS TX: { blockHash: '0x45ab47bde3a7caa62d80e8c38bef21ada499d52331e574f3a09d4d943aa133fa',
blockNumber: 66,
from: '0xf6a36118751c50f8932d31d6d092b11cc28f2258', input: '.....', nonce: 0,
r: 1.1336589614028917e+77,
s: 1.8585853533200337e+76,
shardingFlag: 3,
to: '0x25b0102b5826efa7ac469782f54f40ffa72154f5',
transactionHash: '0x6eb3d33fab53317007927368238aef5bc00d1d1d9bf082930c372e3dabca507c',
transactionIndex: 0,
v: 248,
value: BigNumber { s: 1, e: 21, c: [ 10000000 ] },
gas: 0,
gasPrice: BigNumber { s: 1, e: 0, c: [ 0 ] } }

chain3.scs.getExchangeByAddress

Returns the Withdraw/Deposit exchange records between AppChain 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

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

Returns

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

Example

// Request
var mclist = chain3.scs.getAppChainList(); //find the AppChain on the SCS
mcAddress = mclist[0]; //locate the 1st AppChain
tAddress="0xf6a36118751c50f8932d31d6d092b11cc28f2258";
console.log("SCS token address exchange:", chain3.scs.getExchangeByAddress(mcAddress, tAddress));

// Result
SCS token address exchange: { DepositRecordCount: 0,
DepositRecords: null,
DepositingRecordCount: 0,
DepositingRecords: null,
WithdrawRecordCount: 0,
WithdrawRecords: null,
WithdrawingRecordCount: 0,
WithdrawingRecords: null,
microchain: '0x25b0102b5826efa7ac469782f54f40ffa72154f5',
sender: '0xf6a36118751c50f8932d31d6d092b11cc28f2258' }

chain3.scs.getExchangeInfo

Parameters

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

Returns

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

Example

// Request
var mclist = chain3.scs.getAppChainList(); //find the AppChain on the SCS
mcAddress = mclist[0]; //locate the 1st AppChain
console.log("SCS token exchanging info:", chain3.scs.getExchangeInfo(mcAddress));

// Result
SCS token exchanging info: { DepositingRecordCount: 0,
  DepositingRecords: null,
  WithdrawingRecordCount: 0,
  WithdrawingRecords: null,
  microchain: '0x25b0102b5826efa7ac469782f54f40ffa72154f5',
  scsid: '0xecd1e094ee13d0b47b72f5c940c17bd0c7630326' }

chain3.scs.getTxpool

Returns the ongoing transactions in the AppChain.

Parameters

String - The AppChain 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
var mclist = chain3.scs.getAppChainList(); //find the AppChain on the SCS
mcAddress = mclist[0]; //locate the 1st AppChain
console.log("SCS TXpool:", chain3.scs.getTxpool(mcAddress));

// Result

SCS TXpool: {"pending":{},"queued":{}}