Ethers.js Extension for Kaia

Ethers.js Extension for Kaia offers:

• Drop-in replacement to ethers.Wallet that handles both Ethereum and Kaia transaction types involving AccountKey and TxTypes.
• Drop-in replacement to ethers.providers.JsonRpcProvider that provides accesses to both Ethereum RPCs and Kaia-specific RPCs.
• Drop-in replacement to ethers.Web3Provider to work with both MetaMask (window.ethereum) and Kaia Wallet (window.klaytn)

Note for ethers v6

@kaiachain/ethers-ext supports both ethers v5 and v6. However, you need to use the right packages which are specified for each ethers version. So ethers v5 must be used with packages from @kaiachain/ethers-ext/v5 and ethers v6 is only compatible with @kaiachain/ethers-ext/v6.

NOTE: If the import path has no version sub-path (@kaiachain/ethers-ext), ethers v5 will be used by default.

• Don't: Mixing ethers v6 and ethers-ext for ethers v5

  
  

  const ethers = require("ethers"); // ethers v6

  const { Wallet } = require("@kaiachain/ethers-ext/v5");

  const provider = new ethers.JsonRpcProvider(

  "https://public-en-kairos.node.kaia.io"

  );

  const wallet = new Wallet("<private key>", provider);

  
  

• Do: Using with ethers v5

  
  

  const ethers = require("ethers"); // ethers v5

  const { Wallet } = require("@kaiachain/ethers-ext/v5");

  const provider = new ethers.providers.JsonRpcProvider(

  "https://public-en-kairos.node.kaia.io"

  );

  const wallet = new Wallet("<private key>", provider);

  
  

• Do: Using with ethers v6

  
  

  const ethers = require("ethers"); // ethers v6

  const { Wallet } = require("@kaiachain/ethers-ext/v6");

  const provider = new ethers.JsonRpcProvider(

  "https://public-en-kairos.node.kaia.io"

  );

  const wallet = new Wallet("<private key>", provider);

  
  

• Do: Using ethers-ext only

  
  

  const { Wallet, JsonRpcProvider } = require("@kaiachain/ethers-ext/v5");

  // or

  const { Wallet, JsonRpcProvider } = require("@kaiachain/ethers-ext/v6");

  const provider = new JsonRpcProvider("https://public-en-kairos.node.kaia.io");

  const wallet = new Wallet("<private key>", provider);

  
  

Install

Node.js

• Install

  
  

  npm install --save @kaiachain/ethers-ext ethers@5 # or ethers@6

  
  

• ESM or TypeScript

  
  

  import { Wallet, JsonRpcProvider } from "@kaiachain/ethers-ext";

  // esm

  // v5

  import { v5 } from "@kaiachain/ethers-ext";

  const { Wallet, JsonRpcProvider } = v5;

  // v6

  import { v6 } from "@kaiachain/ethers-ext";

  const { Wallet, JsonRpcProvider } = v6;

  // esm subpath import. If using typescript, add "moduleResolution": "nodenext" to tsconfig.json

  // v5

  import { Wallet, JsonRpcProvider } from "@kaiachain/ethers-ext/v5";

  // v6

  import { Wallet, JsonRpcProvider } from "@kaiachain/ethers-ext/v6";

  const provider = new JsonRpcProvider("https://public-en-kairos.node.kaia.io");

  const wallet = new Wallet("<private key>", provider);

  
  

• CommonJS

  
  

  // v5

  const { Wallet, JsonRpcProvider } = require("@kaiachain/ethers-ext");

  const { Wallet, JsonRpcProvider } = require("@kaiachain/ethers-ext").v5;

  const { Wallet, JsonRpcProvider } = require("@kaiachain/ethers-ext/v5");

  // v6

  const { Wallet, JsonRpcProvider } = require("@kaiachain/ethers-ext").v6;

  const { Wallet, JsonRpcProvider } = require("@kaiachain/ethers-ext/v6");

  const provider = new JsonRpcProvider("https://public-en-kairos.node.kaia.io");

  const wallet = new Wallet("<private key>", provider);

  
  

Browser

It is not recommended to use CDNs in production, But you can use below for quick prototyping. using ethers-ext.buldle.js for ethers v5 and ethers-ext.v6.bundle.js for ethers v6

<script src="https://cdn.jsdelivr.net/npm/@kaiachain/ethers-ext@latest/dist/ethers-ext.bundle.js"></script>

<script>

const provider = new ethers_ext.providers.Web3Provider(window.klaytn);

</script>

Usage

See example and test.