> ## Documentation Index
> Fetch the complete documentation index at: https://cosmos-docs-cosmjs-docs.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Signing Client

> Connecting SigningStargateClient with EVM wallets in CosmJS.

`SigningStargateClient` works with EVM wallets without any special configuration.
When signing transactions, the client inspects the `algo` field from the wallet's
`AccountData` and automatically selects the correct pubkey encoding.

<Warning>
  Gas simulation (`simulate()`) always uses standard secp256k1 pubkey encoding
  regardless of the wallet's `algo` field. This means `"auto"` fees may produce
  incorrect simulations with EVM wallets. Use explicit `StdFee` values instead of
  `"auto"` when working with `DirectEthSecp256k1HdWallet`.
</Warning>

```typescript theme={"system"}
import { SigningStargateClient, GasPrice, calculateFee } from "@cosmjs/stargate";
import { DirectEthSecp256k1HdWallet } from "@cosmjs/proto-signing";

const wallet = await DirectEthSecp256k1HdWallet.fromMnemonic(mnemonic, {
  prefix: "cosmos",
});

const client = await SigningStargateClient.connectWithSigner(
  "http://localhost:26661",
  wallet,
  { gasPrice: GasPrice.fromString("0.025atest") },
);

const [{ address }] = await wallet.getAccounts();

// Use an explicit StdFee with EVM wallets — see the warning above.
const fee = calculateFee(200_000, GasPrice.fromString("0.025atest"));

const result = await client.sendTokens(
  address,
  "cosmos1recipient...",
  [{ denom: "atest", amount: "1000000000000000000" }],
  fee,
);
```