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:
Copy import { getInjectiveAddress , getEthereumAddress } from '@injectivelabs/sdk-ts'
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:
Copy import { PrivateKey } from '@injectivelabs/sdk-ts'
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 snipped on how to derive a public key from a private key:
Copy import { PublicKey } from '@injectivelabs/sdk-ts'
const pubKey = "AuY3ASbyRHfgKNkg7rumWCXzSGCvvgtpR6KKWlpuuQ9Y"
const publicKey = PublicKey .fromBase64 (pubKey)
console .log ( publicKey .toAddress () .toBech32 ())
Example code snipped on how to derive an address from a public key:
Copy import { PublicKey } from '@injectivelabs/sdk-ts'
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:
Copy 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 snipped on how to derive a public key from a private key:
Copy 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
Copy import { config } from "dotenv" ;
import { ChainRestAuthApi , PublicKey } from "@injectivelabs/sdk-ts" ;
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 ()
);
})();
Last updated 2 months ago