Eth Hook for Svelte

• useEth hook returns relevant stores and derived stores
  • connect: async (chainId?: number) => void connect to metamask, with desired side effects (connected = true, provider = injected....)
  • connected: Writable<Bool> whether Metamask is connected
  • provider: Writable<sProvider = ethers.providers.JrpcProvider | ethers.providers.Web3Provider> and the derived stores
    • account: Readable<string>
    • signer: Readable<ethers.Signer>
    • ...

import { useEth, IStore } from 'sveth'
export default const stores: IStore = useEth()
export const {provider, signer, address, chainId, getBalanceStore...} = stores
const balanceStore = getBalanceStore("0xabc123")

<button on:click={() => connect()}> Connect Wallet </button>
<p>connected: {$connected}</p>
{#if $connected}
  <p>chainId: {$chainId}</p>
  <p>Account: {$account}</p>
  <p>Balance: {balance}</p>
  <p>Balance Hook: {$balanceStore}</p>
{/if}

• $store to get value from stores

import ContractCard from "sveth/src/components/ContractCard.svelte"
import { Contract } from "ethers"
import { Interface } from "@ethersproject/abi"
import ERC20ABI from "../abis/ERC20.json"
import store from "../stores/eth"
let contract = new Contract("0xabc123...", new Interface(ERC20ABI))
let contractChainId = 5

 <ContractCard {contract} {store} {contractChainId} />

• For more, see example/

• some previous minor versions are used for testing CICD
• improve <Contract {contract} {store} {chainId}> by prompting users to switch chain when chain is not matched
• refactor src/components/utils.ts isFunction by not using instance of which is not ideal according to the discussion in ethers

• improve balance hooks and others by listening to blocks/events/txs
  • add dependency to newblock store may be a good ideas
  • add contractChainIds to other related stores like balance
• improve <Contract {contract} {store}>
  • parse input/output (BigNumber...)
  • CSS styling support
• const {reactive_contract} = useContract(address, abi, $signer)
• build ts to js before publishing

• the package is a side project of mine, which I will put less effort from now on, feel free to contribute
• You can only use this package with typescript for now