sevm.js

The SEVM.JS SDK of Setheum.JS is a web3 provider that lets existing Ethereum dApps interact with the SetheumEVM (SEVM).

Getting Started

• Install dependencies

yarn

Documentation

Most of the api of sevm.js is compatible with ethers.js. If you are not familiar with ethers.js, you can start by looking at its documentation

Provider

The Provider provides some api for interacting with nodes and is an instance of ethers.js AbstractProvider.

Creating Instances

new Provider( apiOptions )

apiOptions has the same parameters as when creating an instance of apiPromise for polkadot.js

import { options } from "@setheum-js/setheum.js";
import { Provider } from "@setheum-js/sevm.js";
import { WsProvider } from "@polkadot/api";

const evmprovider = new Provider(
  options({
    provider: new WsProvider("ws://localhost:9944")
  })
);

Wallet

The Wallet class inherits Signer and can sign transactions and messages using a private key.

Creating Instances

new Wallet( privateKey , provider? , keyringPair? )

"privateKey" is the private key of evm's account. "provider" is an instance of Provider. "keyringPair" is a key pair for polkadot. If the "keyringPair" is empty, a key pair will be generated from the "privateKey".

import { Wallet } from "@setheum-js/sevm.js";
const wallet = new Wallet("0xaa397267eaee48b2262a973fdcab384a758f39a3ad8708025cfb675bb9effc20", provider)

Wallet.claimEvmAccounts()

Use "keyringpair" to bind an evm account generated by "privateKey".

wallet.claimEvmAccounts()

Examples

deploy a contract

import { deployContract } from "ethereum-waffle";
import ERC20Abi from "../build/ERC20Abi.json";
import { TestAccountSigningKey, Provider, Signer } from "@setheum-js/sevm.js";
import { WsProvider } from "@polkadot/api";
import { createTestPairs } from "@polkadot/keyring/testingPairs";

const provider = new Provider({
  provider: new WsProvider("ws://127.0.0.1:9944"),
});

const testPairs = createTestPairs();

const signingKey = new TestAccountSigningKey(provider.api.registry);

signingKey.addKeyringPair(Object.values(testPairs));

const wallet = new Signer(provider, testPairs.alice.address, signingKey)

const tokenInstance = await deployContract(master, ERC20Abi, [1000]);