@zomet/sdk v0.3.2

SDK for apps

Using

Ethereum based

Initialization

import { evm } from '@zomet/sdk';
import ABI from 'your/path/to/abi.json';

const contract = new evm.Contract('eth', ethContractAddress, ABI);

// you can init contract instance of standard eazier
// it is instance of Contract and it includes all of Contract properties and methods
const BEP20USDTContract = new evm.standards.ERC20('bsc', USDTAddressBEP20);


// optionally you can call the init() method
// it optimizes future calls
// and allows you to initialize additional parameters in contract instance
// also it check if address is contract
// we advise you to do this before starting work with the contract

await contract.init({
    oldContractName: 'Old Token',
    oldChainId: 124,
})

contract.oldContractName // "Old Token"
contract.oldChainId // 124

// also it set name, decimals, and symbol for contract if it possible
contract.name // Tether USD
contract.symbol // USDT
contract.decimals // 18

Call write method of Contract ABI

await contract.call('symbol'); // USDT
await contract.call('decimals'); // 18
await contract.call('balanceOf', walletAddress); // 22.332133244

Get wallet balance

// wrapper for contract.call('balanceOf', walletAddress)
await contract.getWalletBalance(walletAddress); // 22.332133244

Get gas price

await contract.getGasPrice(); // 6000000000 (6gwei)

Transaction Building and Transaction Gas estimation

const tx = {
    method: 'transfer',
    args: [recepientAddress, 1],
    from: senderAddress,
    value: 0, // may be if it native token sending
    // you can set custom gas and gas price,
    // they will added to transaction object
    gas: 192380,
    gasPrice: 5000000000
}

// building tranaction for signing
await contract.buildTransaction(tx);

// estimate gas for transaction, gas param shouldn't be in transaction object
contract.estimateGas(tx); // 31843

Getting user or block info from node

// https://docs.ethers.org/v5/api/providers/provider/
const provider = await contract.getProvider();

await provider.getTransactionCount(walletAddress) // 23
await provider.getBlock(766754) // block info Object