altweb3
v1.2.2
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HTML JavaScript API comunicating to html node over RPC
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altweb3 - Web3.js for HTML
Altweb3 is a library for dApps to interract with the Althash blockchain. Altweb3 communicates to a HTML node via the provider provided.
https://www.npmjs.com/package/altweb3
Get Started
Run the following in your project folder:
npm install altweb3 --save
Web Dapp Usage
This is example is meant for web dapps who would like to use Altweb3's convenience methods with Altmask's RPC provider. Altmask is a HTML wallet. More details about Altmask here.
1. Construct Altweb3 instance
If you have Altmask installed, you will have a window.altmask
object injected in your browser tab. Pass that into Altweb3 as a parameter to set the provider.
const altweb3 = new Altweb3(window.altmask.rpcProvider);
2. Construct Contract instance
The Contract class is meant for executing sendtocontract
or callcontract
at a specific contract address with a given ABI.
const contractAddress = 'f7b958eac2bdaca0f225b86d162f263441d23c19';
const contractAbi = [{"constant":false,"inputs":[{"name":"_eventAddress","type":"address"},{"name":"_eventName","type":"bytes32[10]"},{"name":"_eventResultNames","type":"bytes32[10]"},{"name":"_numOfResults","type":"uint8"},{"name":"_lastResultIndex","type":"uint8"},{"name":"_arbitrationEndBlock","type":"uint256"},{"name":"_consensusThreshold","type":"uint256"}],"name":"createDecentralizedOracle","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_eventAddress","type":"address"},{"name":"_eventName","type":"bytes32[10]"},{"name":"_eventResultNames","type":"bytes32[10]"},{"name":"_numOfResults","type":"uint8"},{"name":"_lastResultIndex","type":"uint8"},{"name":"_arbitrationEndBlock","type":"uint256"},{"name":"_consensusThreshold","type":"uint256"}],"name":"doesDecentralizedOracleExist","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_oracle","type":"address"},{"name":"_eventAddress","type":"address"},{"name":"_eventName","type":"bytes32[10]"},{"name":"_eventResultNames","type":"bytes32[10]"},{"name":"_numOfResults","type":"uint8"},{"name":"_bettingEndBlock","type":"uint256"},{"name":"_resultSettingEndBlock","type":"uint256"},{"name":"_consensusThreshold","type":"uint256"}],"name":"createCentralizedOracle","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_oracle","type":"address"},{"name":"_eventAddress","type":"address"},{"name":"_eventName","type":"bytes32[10]"},{"name":"_eventResultNames","type":"bytes32[10]"},{"name":"_numOfResults","type":"uint8"},{"name":"_bettingEndBlock","type":"uint256"},{"name":"_resultSettingEndBlock","type":"uint256"},{"name":"_consensusThreshold","type":"uint256"}],"name":"doesCentralizedOracleExist","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"bytes32"}],"name":"oracles","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[{"name":"_addressManager","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_contractAddress","type":"address"},{"indexed":true,"name":"_oracle","type":"address"},{"indexed":true,"name":"_eventAddress","type":"address"},{"indexed":false,"name":"_name","type":"bytes32[10]"},{"indexed":false,"name":"_resultNames","type":"bytes32[10]"},{"indexed":false,"name":"_numOfResults","type":"uint8"},{"indexed":false,"name":"_bettingEndBlock","type":"uint256"},{"indexed":false,"name":"_resultSettingEndBlock","type":"uint256"},{"indexed":false,"name":"_consensusThreshold","type":"uint256"}],"name":"CentralizedOracleCreated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_contractAddress","type":"address"},{"indexed":true,"name":"_eventAddress","type":"address"},{"indexed":false,"name":"_name","type":"bytes32[10]"},{"indexed":false,"name":"_resultNames","type":"bytes32[10]"},{"indexed":false,"name":"_numOfResults","type":"uint8"},{"indexed":false,"name":"_lastResultIndex","type":"uint8"},{"indexed":false,"name":"_arbitrationEndBlock","type":"uint256"},{"indexed":false,"name":"_consensusThreshold","type":"uint256"}],"name":"DecentralizedOracleCreated","type":"event"}];
// Create a new Contract instance and use the same provider as altweb3
const contract = altweb3.Contract(contractAddress, contractAbi);
3. Get Logged In Altmask Account
To get the current logged in account in Altmask, you will have to add an Event Listener to listen to messages sent from Altmask.
let account;
function onAltmaskAcctChange(event) {
if (event.data.message && event.data.message.type == "ACCOUNT_CHANGED") {
account = event.data.message.payload;
// You now have the logged in account.
// account = InpageAccount {
// loggedIn: true,
// name: "My Wallet",
// network: "TestNet",
// address: "qJHp6dUSmDShpEEMmwxqHPo7sFSdydSkPM",
// balance: 49.10998413
// }
// You may also get the account from `window.altmask.account`.
// account = window.altmask.account
}
}
window.addEventListener('message', onAltmaskAcctChange, false);
4. Execute sendtocontract
The last piece is to execute a sendtocontract
on your Contract instance. This will automatically show a Altmask popup to confirm that you would like to send the transaction.
// Does a sendtocontract call on a function called setResult(uint8)
const tx = await contract.send('setResult', {
methodArgs: [1], // Sets the function params
gasLimit: 1000000, // Sets the gas limit to 1 million
senderAddress: account.address,
});
// tx = txid of the transaction
Altweb3Provider
The provider is the link between Altweb3 and the blockchain. A compatible Altweb3 Provider adheres to the following interface:
interface Altweb3Provider: {
rawCall: (method: string, args: any[]) => Promise; // returns the result of the request
}
Altweb3
Instantiate a new instance of Altweb3
:
const { Altweb3 } = require('altweb3');
// Instantiate Altweb3 with HttpProvider
// Pass in the URL of your HTML node RPC port with auth credentials.
// Default HTML RPC ports: testnet=14889 mainnet=4889
const altweb3 = new Altweb3('http://althash:pass@localhost:14889');
// Instantiate Altweb3 with AltmaskRPCProvider
// AltmaskRPCProvider is a provider for the Altmask Wallet Chrome Extension.
// Please note AltmaskRPCProvider only allows the rawCall() method to be used.
// It is specifically used for `sendtocontract` and `callcontract` only.
const altweb3 = new Altweb3(window.altmask.rpcProvider);
isConnected()
Checks if you are connected properly to the local html node.
async function isConnected() {
return await altweb3.isConnected();
}
getHexAddress(address)
Converts a HTML address to hex format.
async function getHexAddress() {
return await altweb3.getHexAddress('hKjn4fStBaAtwGiwueJf9qFxgpbAvf1xAy');
}
fromHexAddress(hexAddress)
Converts a hex address to Html format.
async function fromHexAddress() {
return await altweb3.fromHexAddress('17e7888aa7412a735f336d2f6d784caefabb6fa3');
}
getBlockCount()
Gets the current block height of your local Html node.
async function getBlockCount() {
return await altweb3.getBlockCount();
}
getTransaction(txid)
Gets the transaction details of the transaction id.
async function getTransaction(args) {
const {
transactionId, // string
} = args;
return await altweb3.getTransactionReceipt(transactionId);
}
getTransactionReceipt(txid)
Gets the transaction receipt of the transaction id.
async function getTransactionReceipt(args) {
const {
transactionId, // string
} = args;
return await altweb3.getTransactionReceipt(transactionId);
}
listUnspent()
Gets the unspent outputs that can be used.
async function listUnspent() {
return await altweb3.listUnspent();
}
searchLogs(fromBlock, toBlock, addresses, topics, contractMetadata, removeHexPrefix)
Gets the logs given the params on the blockchain.
The contractMetadata
param contains the contract names and ABI that you would like to parse. An example of one is:
# contract_metadata.js
module.exports = {
EventFactory: {
address: 'd53927df927be7fc51ce8bf8b998cb6611c266b0',
abi: [{ constant: true, inputs: [{ name: '', type: 'bytes32' }], name: 'topics', outputs: [{ name: '', type: 'address' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: false, inputs: [{ name: '_oracle', type: 'address' }, { name: '_name', type: 'bytes32[10]' }, { name: '_resultNames', type: 'bytes32[10]' }, { name: '_bettingEndBlock', type: 'uint256' }, { name: '_resultSettingEndBlock', type: 'uint256' }], name: 'createTopic', outputs: [{ name: 'topicEvent', type: 'address' }], payable: false, stateMutability: 'nonpayable', type: 'function' }, { constant: true, inputs: [{ name: '_name', type: 'bytes32[10]' }, { name: '_resultNames', type: 'bytes32[10]' }, { name: '_bettingEndBlock', type: 'uint256' }, { name: '_resultSettingEndBlock', type: 'uint256' }], name: 'doesTopicExist', outputs: [{ name: '', type: 'bool' }], payable: false, stateMutability: 'view', type: 'function' }, { inputs: [{ name: '_addressManager', type: 'address' }], payable: false, stateMutability: 'nonpayable', type: 'constructor' }, { anonymous: false, inputs: [{ indexed: true, name: '_topicAddress', type: 'address' }, { indexed: true, name: '_creator', type: 'address' }, { indexed: true, name: '_oracle', type: 'address' }, { indexed: false, name: '_name', type: 'bytes32[10]' }, { indexed: false, name: '_resultNames', type: 'bytes32[10]' }, { indexed: false, name: '_bettingEndBlock', type: 'uint256' }, { indexed: false, name: '_resultSettingEndBlock', type: 'uint256' }], name: 'TopicCreated', type: 'event' }],
},
TopicEvent: {
abi: [{ constant: false, inputs: [{ name: '_resultIndex', type: 'uint8' }, { name: '_sender', type: 'address' }, { name: '_amount', type: 'uint256' }], name: 'voteFromOracle', outputs: [{ name: '', type: 'bool' }], payable: false, stateMutability: 'nonpayable', type: 'function' }, { constant: true, inputs: [], name: 'totalBotValue', outputs: [{ name: '', type: 'uint256' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: true, inputs: [{ name: '_oracleIndex', type: 'uint8' }], name: 'getOracle', outputs: [{ name: '', type: 'address' }, { name: '', type: 'bool' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: true, inputs: [{ name: '', type: 'address' }], name: 'didWithdraw', outputs: [{ name: '', type: 'bool' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: true, inputs: [], name: 'resultSet', outputs: [{ name: '', type: 'bool' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: true, inputs: [], name: 'status', outputs: [{ name: '', type: 'uint8' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: true, inputs: [], name: 'getFinalResult', outputs: [{ name: '', type: 'uint8' }, { name: '', type: 'string' }, { name: '', type: 'bool' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: true, inputs: [{ name: '', type: 'uint256' }], name: 'resultNames', outputs: [{ name: '', type: 'bytes32' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: true, inputs: [{ name: '', type: 'uint256' }], name: 'oracles', outputs: [{ name: 'didSetResult', type: 'bool' }, { name: 'oracleAddress', type: 'address' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: false, inputs: [], name: 'finalizeResult', outputs: [{ name: '', type: 'bool' }], payable: false, stateMutability: 'nonpayable', type: 'function' }, { constant: false, inputs: [{ name: '_oracle', type: 'address' }, { name: '_resultIndex', type: 'uint8' }, { name: '_consensusThreshold', type: 'uint256' }], name: 'centralizedOracleSetResult', outputs: [], payable: false, stateMutability: 'nonpayable', type: 'function' }, { constant: true, inputs: [], name: 'totalQtumValue', outputs: [{ name: '', type: 'uint256' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: false, inputs: [{ name: '_consensusThreshold', type: 'uint256' }], name: 'invalidateOracle', outputs: [], payable: false, stateMutability: 'nonpayable', type: 'function' }, { constant: true, inputs: [], name: 'getBetBalances', outputs: [{ name: '', type: 'uint256[10]' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: true, inputs: [], name: 'owner', outputs: [{ name: '', type: 'address' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: true, inputs: [], name: 'calculateQtumContributorWinnings', outputs: [{ name: '', type: 'uint256' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: true, inputs: [], name: 'getVoteBalances', outputs: [{ name: '', type: 'uint256[10]' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: true, inputs: [], name: 'getTotalVotes', outputs: [{ name: '', type: 'uint256[10]' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: false, inputs: [{ name: '_better', type: 'address' }, { name: '_resultIndex', type: 'uint8' }], name: 'bet', outputs: [], payable: true, stateMutability: 'payable', type: 'function' }, { constant: false, inputs: [{ name: '_resultIndex', type: 'uint8' }, { name: '_currentConsensusThreshold', type: 'uint256' }], name: 'votingOracleSetResult', outputs: [{ name: '', type: 'bool' }], payable: false, stateMutability: 'nonpayable', type: 'function' }, { constant: true, inputs: [], name: 'getTotalBets', outputs: [{ name: '', type: 'uint256[10]' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: true, inputs: [], name: 'getEventName', outputs: [{ name: '', type: 'string' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: true, inputs: [], name: 'invalidResultIndex', outputs: [{ name: '', type: 'uint8' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: true, inputs: [], name: 'numOfResults', outputs: [{ name: '', type: 'uint8' }], payable: false, stateMutability: 'view', type: 'function' }, { constant: false, inputs: [], name: 'withdrawWinnings', outputs: [], payable: false, stateMutability: 'nonpayable', type: 'function' }, { constant: false, inputs: [{ name: '_newOwner', type: 'address' }], name: 'transferOwnership', outputs: [], payable: false, stateMutability: 'nonpayable', type: 'function' }, { constant: true, inputs: [], name: 'calculateBotContributorWinnings', outputs: [{ name: '', type: 'uint256' }], payable: false, stateMutability: 'view', type: 'function' }, { inputs: [{ name: '_owner', type: 'address' }, { name: '_centralizedOracle', type: 'address' }, { name: '_name', type: 'bytes32[10]' }, { name: '_resultNames', type: 'bytes32[10]' }, { name: '_bettingEndBlock', type: 'uint256' }, { name: '_resultSettingEndBlock', type: 'uint256' }, { name: '_addressManager', type: 'address' }], payable: false, stateMutability: 'nonpayable', type: 'constructor' }, { payable: true, stateMutability: 'payable', type: 'fallback' }, { anonymous: false, inputs: [{ indexed: true, name: '_eventAddress', type: 'address' }, { indexed: false, name: '_finalResultIndex', type: 'uint8' }], name: 'FinalResultSet', type: 'event' }, { anonymous: false, inputs: [{ indexed: true, name: '_winner', type: 'address' }, { indexed: false, name: '_qtumTokenWon', type: 'uint256' }, { indexed: false, name: '_botTokenWon', type: 'uint256' }], name: 'WinningsWithdrawn', type: 'event' }, { anonymous: false, inputs: [{ indexed: true, name: '_previousOwner', type: 'address' }, { indexed: true, name: '_newOwner', type: 'address' }], name: 'OwnershipTransferred', type: 'event' }],
},
};
Usage:
const ContractMetadata = require('./contract_metadata');
async function(args) {
let {
fromBlock, // number
toBlock, // number
addresses, // string array
topics // string array
} = args;
if (addresses === undefined) {
addresses = [];
}
if (topics === undefined) {
topics = [];
}
// removeHexPrefix = true removes the '0x' hex prefix from all hex values
return await altweb3.searchLogs(fromBlock, toBlock, addresses, topics, contractMetadata, true);
}
Contract.js
Instantiate a new instance of Contract
:
const { Altweb3 } = require('altweb3');
const altweb3 = new Altweb3('http://althash:pass@localhost:14889');
// contractAddress = The address of your contract deployed on the blockchain
const contractAddress = 'f7b958eac2bdaca0f225b86d162f263441d23c19';
// contractAbi = The ABI of the contract
const contractAbi = [{"constant":false,"inputs":[{"name":"_eventAddress","type":"address"},{"name":"_eventName","type":"bytes32[10]"},{"name":"_eventResultNames","type":"bytes32[10]"},{"name":"_numOfResults","type":"uint8"},{"name":"_lastResultIndex","type":"uint8"},{"name":"_arbitrationEndBlock","type":"uint256"},{"name":"_consensusThreshold","type":"uint256"}],"name":"createDecentralizedOracle","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_eventAddress","type":"address"},{"name":"_eventName","type":"bytes32[10]"},{"name":"_eventResultNames","type":"bytes32[10]"},{"name":"_numOfResults","type":"uint8"},{"name":"_lastResultIndex","type":"uint8"},{"name":"_arbitrationEndBlock","type":"uint256"},{"name":"_consensusThreshold","type":"uint256"}],"name":"doesDecentralizedOracleExist","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_oracle","type":"address"},{"name":"_eventAddress","type":"address"},{"name":"_eventName","type":"bytes32[10]"},{"name":"_eventResultNames","type":"bytes32[10]"},{"name":"_numOfResults","type":"uint8"},{"name":"_bettingEndBlock","type":"uint256"},{"name":"_resultSettingEndBlock","type":"uint256"},{"name":"_consensusThreshold","type":"uint256"}],"name":"createCentralizedOracle","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_oracle","type":"address"},{"name":"_eventAddress","type":"address"},{"name":"_eventName","type":"bytes32[10]"},{"name":"_eventResultNames","type":"bytes32[10]"},{"name":"_numOfResults","type":"uint8"},{"name":"_bettingEndBlock","type":"uint256"},{"name":"_resultSettingEndBlock","type":"uint256"},{"name":"_consensusThreshold","type":"uint256"}],"name":"doesCentralizedOracleExist","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"bytes32"}],"name":"oracles","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[{"name":"_addressManager","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_contractAddress","type":"address"},{"indexed":true,"name":"_oracle","type":"address"},{"indexed":true,"name":"_eventAddress","type":"address"},{"indexed":false,"name":"_name","type":"bytes32[10]"},{"indexed":false,"name":"_resultNames","type":"bytes32[10]"},{"indexed":false,"name":"_numOfResults","type":"uint8"},{"indexed":false,"name":"_bettingEndBlock","type":"uint256"},{"indexed":false,"name":"_resultSettingEndBlock","type":"uint256"},{"indexed":false,"name":"_consensusThreshold","type":"uint256"}],"name":"CentralizedOracleCreated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_contractAddress","type":"address"},{"indexed":true,"name":"_eventAddress","type":"address"},{"indexed":false,"name":"_name","type":"bytes32[10]"},{"indexed":false,"name":"_resultNames","type":"bytes32[10]"},{"indexed":false,"name":"_numOfResults","type":"uint8"},{"indexed":false,"name":"_lastResultIndex","type":"uint8"},{"indexed":false,"name":"_arbitrationEndBlock","type":"uint256"},{"indexed":false,"name":"_consensusThreshold","type":"uint256"}],"name":"DecentralizedOracleCreated","type":"event"}];
// Create a Contract instance from the Altweb3 instance
const contract = altweb3.Contract(contractAddress, contractAbi);
call(methodName, params)
Executes a callcontract
// callcontract on a method named 'bettingEndBlock'
async function exampleCall(args) {
const {
senderAddress, // address
} = args;
return await contract.call('bettingEndBlock', {
methodArgs: [],
senderAddress: senderAddress,
});
}
send(methodName, params)
Executes a sendtocontract
// sendtocontract on a method named 'setResult'
async function exampleSend(args) {
const {
resultIndex, // number
senderAddress, // address
} = args;
return await contract.send('setResult', {
methodArgs: [resultIndex],
gasLimit: 1000000, // setting the gas limit to 1 million
senderAddress: senderAddress,
});
}
Encoder
Encoder
static functions are exposed in Altweb3 instances.
const { Altweb3 } = require('altweb3');
const altweb3 = new Altweb3('http://althash:pass@localhost:14889');
altweb3.encoder.objToHash(abiObj, isFunction);
altweb3.encoder.addressToHex(address);
altweb3.encoder.boolToHex(value);
altweb3.encoder.intToHex(num);
altweb3.encoder.uintToHex(num);
altweb3.encoder.stringToHex(string, maxCharLen);
altweb3.encoder.stringArrayToHex(strArray, numOfItems);
altweb3.encoder.padHexString(hexStr);
altweb3.encoder.constructData(abi, methodName, args);
Decoder
Decoder
static functions are exposed in Altweb3 instances.
const { Altweb3 } = require('altweb3');
const altweb3 = new Altweb3('http://althash:pass@localhost:14889');
altweb3.decoder.toQtumAddress(hexAddress, isMainnet);
altweb3.decoder.removeHexPrefix(value);
altweb3.decoder.decodeSearchLog(rawOutput, contractMetadata, removeHexPrefix);
altweb3.decoder.decodeCall(rawOutput, contractABI, methodName, removeHexPrefix);
Utils
Utils
static functions are exposed in Altweb3 instances.
const { Altweb3 } = require('altweb3');
const altweb3 = new Altweb3('http://althash:pass@localhost:14889');
altweb3.utils.paramsCheck(methodName, params, required, validators);
altweb3.utils.appendHexPrefix(value);
altweb3.utils.trimHexPrefix(str);
altweb3.utils.chunkString(str, length);
altweb3.utils.toUtf8(hex);
altweb3.utils.fromUtf8(str);
altweb3.utils.isJson(str);
altweb3.utils.isQtumAddress(address);
Running Tests
You need to create a .env
file in the root folder with the following variables in the following formats. Change it to how your environment is setup.
QTUM_RPC_ADDRESS='http://althash:pass@localhost:14889'
SENDER_ADDRESS='hMZK8FNPRm54jvTLAGEs1biTCgyCkcsmna'
WALLET_PASSPHRASE='althash'