diff --git a/wallets/react-wallet-v2/src/lib/EIP155.ts b/wallets/react-wallet-v2/src/lib/EIP155.ts
deleted file mode 100644
index c4c4fa1..0000000
--- a/wallets/react-wallet-v2/src/lib/EIP155.ts
+++ /dev/null
@@ -1,69 +0,0 @@
-import { Secp256k1Wallet, StdSignDoc } from '@cosmjs/amino'
-import { fromHex } from '@cosmjs/encoding'
-import { DirectSecp256k1Wallet, makeSignBytes } from '@cosmjs/proto-signing'
-// @ts-expect-error
-import { SignDoc } from '@cosmjs/proto-signing/build/codec/cosmos/tx/v1beta1/tx'
-import MnemonicKeyring from 'mnemonic-keyring'
-
-/**
- * Constants
- */
-const DEFAULT_PATH = "m/44'/118'/0'/0/0"
-
-/**
- * Types
- */
-interface IInitArguments {
-  mnemonic?: string
-  path?: string
-  prefix?: string
-}
-
-/**
- * Utility
- */
-export class EIP155 {
-  private keyring: MnemonicKeyring
-  private directSigner: DirectSecp256k1Wallet
-  private aminoSigner: Secp256k1Wallet
-
-  constructor(
-    keyring: MnemonicKeyring,
-    directSigner: DirectSecp256k1Wallet,
-    aminoSigner: Secp256k1Wallet
-  ) {
-    this.directSigner = directSigner
-    this.keyring = keyring
-    this.aminoSigner = aminoSigner
-  }
-
-  static async init({ mnemonic, path, prefix }: IInitArguments) {
-    const keyring = await MnemonicKeyring.init({ mnemonic })
-    const privateKey = fromHex(keyring.getPrivateKey(path ?? DEFAULT_PATH))
-    const chainPrefix = prefix ?? 'cosmos'
-    const directSigner = await DirectSecp256k1Wallet.fromKey(privateKey, chainPrefix)
-    const aminoSigner = await Secp256k1Wallet.fromKey(privateKey, chainPrefix)
-
-    return new EIP155(keyring, directSigner, aminoSigner)
-  }
-
-  public async getAccount(number = 0) {
-    const account = await this.directSigner.getAccounts()
-
-    return account[number]
-  }
-
-  public getMnemonic() {
-    return this.keyring.mnemonic
-  }
-
-  public async signDirect(address: string, signDoc: SignDoc) {
-    const signDocBytes = makeSignBytes(signDoc)
-    // @ts-expect-error
-    return await this.directSigner.signDirect(address, signDocBytes)
-  }
-
-  public async signAmino(address: string, signDoc: StdSignDoc) {
-    return await this.aminoSigner.signAmino(address, signDoc)
-  }
-}
diff --git a/wallets/react-wallet-v2/src/lib/Solana.ts b/wallets/react-wallet-v2/src/lib/SolanaLib.ts
similarity index 85%
rename from wallets/react-wallet-v2/src/lib/Solana.ts
rename to wallets/react-wallet-v2/src/lib/SolanaLib.ts
index 140136f..aca412f 100644
--- a/wallets/react-wallet-v2/src/lib/Solana.ts
+++ b/wallets/react-wallet-v2/src/lib/SolanaLib.ts
@@ -2,17 +2,27 @@ import { Keypair, PublicKey, Transaction, TransactionInstructionCtorFields } fro
 import bs58 from 'bs58'
 import nacl from 'tweetnacl'
 
-export class Solana {
+/**
+ * Types
+ */
+interface IInitArguments {
+  secretKey?: Uint8Array
+}
+
+/**
+ * Library
+ */
+export default class SolanaLib {
   keypair: Keypair
 
   constructor(keypair: Keypair) {
     this.keypair = keypair
   }
 
-  static init(secretKey?: Uint8Array) {
+  static init({ secretKey }: IInitArguments) {
     const keypair = secretKey ? Keypair.fromSecretKey(secretKey) : Keypair.generate()
 
-    return new Solana(keypair)
+    return new SolanaLib(keypair)
   }
 
   public async getAccount() {
diff --git a/wallets/react-wallet-v2/src/utils/SolanaWalletUtil.ts b/wallets/react-wallet-v2/src/utils/SolanaWalletUtil.ts
index 1ff70f1..d1d336c 100644
--- a/wallets/react-wallet-v2/src/utils/SolanaWalletUtil.ts
+++ b/wallets/react-wallet-v2/src/utils/SolanaWalletUtil.ts
@@ -1,8 +1,8 @@
-import { Solana } from '@/lib/Solana'
+import SolanaLib from '@/lib/SolanaLib'
 
-export let wallet1: Solana
-export let wallet2: Solana
-export let solanaWallets: Record<string, Solana>
+export let wallet1: SolanaLib
+export let wallet2: SolanaLib
+export let solanaWallets: Record<string, SolanaLib>
 export let solanaAddresses: string[]
 
 let address1: string
@@ -19,13 +19,13 @@ export async function createOrRestoreSolanaWallet() {
     const secretArray1: number[] = Object.values(JSON.parse(secretKey1))
     const secretArray2: number[] = Object.values(JSON.parse(secretKey2))
 
-    wallet1 = Solana.init(Uint8Array.from(secretArray1))
-    wallet2 = Solana.init(Uint8Array.from(secretArray2))
+    wallet1 = SolanaLib.init({ secretKey: Uint8Array.from(secretArray1) })
+    wallet2 = SolanaLib.init({ secretKey: Uint8Array.from(secretArray2) })
     address1 = await wallet1.getAccount()
     address2 = await wallet2.getAccount()
   } else {
-    wallet1 = Solana.init()
-    wallet2 = Solana.init()
+    wallet1 = SolanaLib.init({})
+    wallet2 = SolanaLib.init({})
     address1 = await wallet1.getAccount()
     address2 = await wallet2.getAccount()
     // Don't store secretKey in local storage in a production project!