Accounts - Injective Docs

Injective defines its own custom Account type that uses Ethereum’s ECDSA secp256k1 curve for keys. This satisfies the EIP84 for full BIP44 paths. The root HD path for Injective-based accounts is m/44'/60'/0'/0.

Address conversion

You can easily convert between an Injective address and Ethereum address by using our utility functions in the @injectivelabs/sdk-ts package:

import {
  getInjectiveAddress,
  getEthereumAddress,
} from "@injectivelabs/sdk-ts/utils";

const injectiveAddress = "inj1...";
const ethereumAddress = "0x..";

console.log(
  "Injective address from Ethereum address => ",
  getInjectiveAddress(ethereumAddress)
);
console.log(
  "Ethereum address from Injective address => ",
  getEthereumAddress(injectiveAddress)
);

Deriving wallets

Using Injective utility classes

Example code snippet on how to derive Injective Account from a private key and/or a mnemonic phrase:

import { PrivateKey } from "@injectivelabs/sdk-ts/core/accounts";

const mnemonic =
  "indoor dish desk flag debris potato excuse depart ticket judge file exit";
const privateKey =
  "afdfd9c3d2095ef696594f6cedcae59e72dcd697e2a7521b1578140422a4f890";
const privateKeyFromMnemonic = PrivateKey.fromMnemonic(mnemonic);
const privateKeyFromHex = PrivateKey.fromPrivateKey(privateKey);

const address =
  privateKeyFromMnemonic.toAddress(); /* or privateKeyFromHex.toAddress() */
console.log({
  injectiveAddress: address.toBech32(),
  ethereumAddress: address.toHex(),
});

Example code snippet on how to derive a public address from a public key:

import { PublicKey } from "@injectivelabs/sdk-ts/core/accounts";

const pubKey = "AuY3ASbyRHfgKNkg7rumWCXzSGCvvgtpR6KKWlpuuQ9Y";
const publicKey = PublicKey.fromBase64(pubKey);

console.log(publicKey.toAddress().toBech32());

Example code snippet on how to derive an address from a private key:

import { PublicKey } from "@injectivelabs/sdk-ts/core/accounts";

const privateKey =
  "afdfd9c3d2095ef696594f6cedcae59e72dcd697e2a7521b1578140422a4f890";
const publicKey = PublicKey.fromPrivateKeyHex(privateKey);
const type = "/injective.crypto.v1beta1.ethsecp256k1.PubKey";

console.log(publicKey.toBase64());

Without using Injective utility classes

Example code snippet on how to derive Injective Account from a private key and/or a mnemonic phrase:

import { Wallet } from "ethers";
import { Address as EthereumUtilsAddress } from "ethereumjs-util";

const mnemonic =
  "indoor dish desk flag debris potato excuse depart ticket judge file exit";
const privateKey =
  "afdfd9c3d2095ef696594f6cedcae59e72dcd697e2a7521b1578140422a4f890";
const defaultDerivationPath = "m/44'/60'/0'/0/0";
const defaultBech32Prefix = "inj";
const isPrivateKey: boolean = true; /* just for the example */

const wallet = isPrivateKey
  ? Wallet.fromMnemonic(mnemonic, defaultDerivationPath)
  : new Wallet(privateKey);
const ethereumAddress = wallet.address;
const addressBuffer = EthereumUtilsAddress.fromString(
  ethereumAddress.toString()
).toBuffer();
const injectiveAddress = bech32.encode(
  defaultBech32Prefix,
  bech32.toWords(addressBuffer)
);

Example code snippet on how to derive a public key from a private key:

import secp256k1 from "secp256k1";

const privateKey =
  "afdfd9c3d2095ef696594f6cedcae59e72dcd697e2a7521b1578140422a4f890";
const privateKeyHex = Buffer.from(privateKey.toString(), "hex");
const publicKeyByte = secp256k1.publicKeyCreate(privateKeyHex);

const buf1 = Buffer.from([10]);
const buf2 = Buffer.from([publicKeyByte.length]);
const buf3 = Buffer.from(publicKeyByte);

const publicKey = Buffer.concat([buf1, buf2, buf3]).toString("base64");
const type = "/injective.crypto.v1beta1.ethsecp256k1.PubKey";

Convert Cosmos address to Injective Address

As Injective has a different derivation path than the default Cosmos one, you need the publicKey of the account to convert a Cosmos publicAddress to Injective one. Here is an example of how to do it

import { config } from "dotenv";
import { PublicKey } from "@injectivelabs/sdk-ts/core/accounts";
import { ChainRestAuthApi } from "@injectivelabs/sdk-ts/client/chain";

config();

(async () => {
  const chainApi = new ChainRestAuthApi(
    "https://rest.cosmos.directory/cosmoshub"
  );

  const cosmosAddress = "cosmos1..";
  const account = await chainApi.fetchCosmosAccount(cosmosAddress);

  if (!account.pub_key?.key) {
    console.log("No public key found");
    return;
  }

  console.log(
    "injectiveAddress",
    PublicKey.fromBase64(account.pub_key.key || "")
      .toAddress()
      .toBech32()
  );
})();

​Address conversion

​Deriving wallets

​Convert Cosmos address to Injective Address

Address conversion

Deriving wallets

Convert Cosmos address to Injective Address