draft: install evmosjs, create signEthereum path

packages/common-common/src/types.ts

@@ -118,6 +118,7 @@ export enum ChainNetwork {
   SPL = 'spl', // solana token
   AxieInfinity = 'axie-infinity',
   Evmos = 'evmos',
+  EvmosDevnet = 'evmos-devnet',
   Kava = 'kava',
 }
 

packages/commonwealth/client/scripts/controllers/app/webWallets/cosmos_evm_metamask_web_wallet.ts

@@ -37,7 +37,7 @@ class CosmosEvmWebWalletController implements IWebWallet<string> {
   public readonly label = 'Metamask';
   public readonly chain = ChainBase.CosmosSDK;
   public readonly defaultNetwork = ChainNetwork.Injective;
-  public readonly specificChains = ['injective', 'evmos'];
+  public readonly specificChains = ['injective', 'evmos', 'evmos-devnet'];
 
   public get available() {
     return !!window.ethereum;

packages/commonwealth/client/scripts/controllers/app/webWallets/keplr_ethereum_web_wallet.ts

@@ -24,7 +24,7 @@ class EVMKeplrWebWalletController implements IWebWallet<AccountData> {
   public readonly label = 'Keplr';
   public readonly chain = ChainBase.CosmosSDK;
   public readonly defaultNetwork = ChainNetwork.Evmos;
-  public readonly specificChains = ['evmos', 'injective'];
+  public readonly specificChains = ['evmos', 'injective', 'evmos-devnet'];
 
   public get available() {
     return !!window.keplr;
@@ -133,24 +133,24 @@ class EVMKeplrWebWalletController implements IWebWallet<AccountData> {
           currencies: [
             {
               coinDenom: app.chain.meta.default_symbol,
-              coinMinimalDenom: `u${app.chain.meta.default_symbol.toLowerCase()}`,
+              coinMinimalDenom: `a${app.chain.meta.default_symbol.toLowerCase()}`,
               coinDecimals: app.chain.meta.decimals || 6,
             },
           ],
           feeCurrencies: [
             {
               coinDenom: app.chain.meta.default_symbol,
-              coinMinimalDenom: `u${app.chain.meta.default_symbol.toLowerCase()}`,
+              coinMinimalDenom: `a${app.chain.meta.default_symbol.toLowerCase()}`,
               coinDecimals: app.chain.meta.decimals || 6,
             },
           ],
           stakeCurrency: {
             coinDenom: app.chain.meta.default_symbol,
-            coinMinimalDenom: `u${app.chain.meta.default_symbol.toLowerCase()}`,
+            coinMinimalDenom: `a${app.chain.meta.default_symbol.toLowerCase()}`,
             coinDecimals: app.chain.meta.decimals || 6,
           },
           gasPriceStep: { low: 0, average: 0.025, high: 0.03 },
-          features: ['stargate'],
+          features: ['stargate', 'eth-address-gen', 'eth-key-sign'],
         };
         await window.keplr.experimentalSuggestChain(info);
         await window.keplr.enable(this._chainId);

packages/commonwealth/client/scripts/controllers/chain/cosmos/chain.ts

@@ -1,5 +1,25 @@
 import type { EncodeObject } from '@cosmjs/proto-signing';
 
+import { EthSignType } from '@keplr-wallet/types';
+import { createTxRaw } from '@evmos/proto';
+import {
+  generateEndpointBroadcast,
+  generatePostBodyBroadcast,
+} from '@evmos/provider';
+
+import {
+  Chain,
+  Sender,
+  Fee,
+  TxContext,
+  MsgSendParams,
+  MsgSubmitProposalParams,
+  createTxMsgSend,
+  createTxMsgVote,
+  createTxMsgSubmitProposal,
+  TxPayload,
+} from '@evmos/transactions';
+
 import type {
   BankExtension,
   GovExtension,
@@ -188,6 +208,71 @@ class CosmosChain implements IChainModule<CosmosToken, CosmosAccount> {
     }
   }
 
+  public async sendTxEthereum(
+    account: CosmosAccount,
+    tx: TxPayload
+  ): Promise<any]> {
+  // ): Promise<readonly Event[]> {
+    const wallet = WebWalletController.Instance.getByName(
+      WalletId.Keplr
+    ) as KeplrWebWalletController;
+    if (!wallet) throw new Error('Keplr wallet not found');
+    if (!wallet.enabled) {
+      await wallet.enable();
+    }
+    try {
+      // First, populate a TxContext object and create a signable Tx payload.
+      // (See 'Create a Signable Transaction' to learn how to create these).
+
+      const chain = this.app.chain.id; //TODO
+      const sender = account.address;
+
+      const eip712Payload = JSON.stringify(tx.eipToSign);
+      const signature = await window?.keplr?.signEthereum(
+        chain,
+        sender,
+        eip712Payload,
+        EthSignType.TRANSACTION
+      );
+
+      if (!signature) {
+        // Handle signature failure here.
+      }
+
+      const { signDirect } = tx;
+      const bodyBytes = signDirect.body.toBinary();
+      const authInfoBytes = signDirect.authInfo.toBinary();
+
+      const signedTx = createTxRaw(bodyBytes, authInfoBytes, [signature]);
+
+      // broadcast
+
+      // First, sign a transaction using MetaMask or Keplr.
+
+      // Find a node URL from a network endpoint:
+      // https://docs.evmos.org/develop/api/networks.
+      const nodeUrl = this.app.chain.meta.node.url;
+
+      const postOptions = {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: generatePostBodyBroadcast(signedTx),
+      };
+
+      const broadcastEndpoint = `${nodeUrl}${generateEndpointBroadcast()}`;
+      const broadcastPost = await fetch(broadcastEndpoint, postOptions);
+
+      const response = await broadcastPost.json();
+
+      console.log('response', response);
+
+      return response;
+    } catch (err) {
+      console.log(err.message);
+      throw err;
+    }
+  }
+
   public createTXModalData(
     author: CosmosAccount,
     txFunc,