Use appropriate cosmos address prefix while signing messages (#22)

Part of https://www.notion.so/Revive-attestation-react-app-19da6b22d472809595c2fb9d2970849f

Co-authored-by: Shreerang Kale <shreerangkale@gmail.com>
Reviewed-on: cerc-io/laconic-wallet-web#22

.eslintignore

@@ -0,0 +1 @@
+build

src/utils/sign-message.ts

@@ -3,6 +3,7 @@ For more information, "visit https://docs.ethers.org/v5/cookbook/react-native/#c
 import 'react-native-get-random-values';
 
 import '@ethersproject/shims';
+import { fromBech32 } from '@cosmjs/encoding';
 
 import { Wallet } from 'ethers';
 import { SignDoc } from 'cosmjs-types/cosmos/tx/v1beta1/tx';
@@ -24,7 +25,7 @@ const signMessage = async ({
     case EIP155:
       return await signEthMessage(message, accountId, chainId);
     case COSMOS:
-      return await signCosmosMessage(message, path.path);
+      return await signCosmosMessage(message, path.path, path.address);
     default:
       throw new Error('Invalid wallet type');
   }
@@ -51,10 +52,13 @@ const signEthMessage = async (
 const signCosmosMessage = async (
   message: string,
   path: string,
+  cosmosAddress: string,
 ): Promise<string | undefined> => {
   try {
     const mnemonic = await getMnemonic();
-    const cosmosAccount = await getCosmosAccounts(mnemonic, path);
+    const addressPrefix = fromBech32(cosmosAddress).prefix
+
+    const cosmosAccount = await getCosmosAccounts(mnemonic, path, addressPrefix);
     const address = cosmosAccount.data.address;
     const cosmosSignature = await cosmosAccount.cosmosWallet.signAmino(
       address,

src/utils/wallet-connect/wallet-connect-requests.ts

@@ -9,6 +9,7 @@ import {
   StdFee,
   MsgSendEncodeObject
 } from '@cosmjs/stargate';
+import { fromBech32 } from '@cosmjs/encoding';
 import { EncodeObject } from '@cosmjs/proto-signing';
 import { LaconicClient } from '@cerc-io/registry-sdk';
 import { Buffer } from 'buffer';
@@ -19,6 +20,7 @@ import { Account } from '../../types';
 import { getMnemonic, getPathKey } from '../misc';
 import { getCosmosAccounts } from '../accounts';
 import { COSMOS_METHODS } from './COSMOSData';
+import { COSMOS } from '../constants';
 
 interface EthSendTransaction {
   type: 'eth_sendTransaction';
@@ -80,7 +82,13 @@ export async function approveWalletConnectRequest(
   const path = (await getPathKey(`${namespace}:${chainId}`, account.index))
     .path;
   const mnemonic = await getMnemonic();
-  const cosmosAccount = await getCosmosAccounts(mnemonic, path);
+
+  let addressPrefix: string | undefined
+  if (namespace === COSMOS) {
+    addressPrefix = fromBech32(account.address).prefix
+  }
+
+  const cosmosAccount = await getCosmosAccounts(mnemonic, path, addressPrefix);
   const address = account.address;
 
   switch (request.method) {