Add simulate example

packages/cli/examples/simulate.ts

@@ -0,0 +1,48 @@
+import { makeCosmoshubPath } from "@cosmjs/amino";
+import { DirectSecp256k1HdWallet } from "@cosmjs/proto-signing";
+import {
+  assertIsBroadcastTxSuccess,
+  calculateFee,
+  GasPrice,
+  MsgSendEncodeObject,
+  SigningStargateClient,
+} from "@cosmjs/stargate";
+
+// Wallet
+const mnemonic =
+  "economy stock theory fatal elder harbor betray wasp final emotion task crumble siren bottom lizard educate guess current outdoor pair theory focus wife stone";
+const path = makeCosmoshubPath(3);
+const prefix = "cosmos";
+const wallet = await DirectSecp256k1HdWallet.fromMnemonic(mnemonic, { hdPaths: [path], prefix: prefix });
+const [account] = await wallet.getAccounts();
+console.log("Signer address:", account.address);
+
+// Network config
+const rpcEndpoint = "ws://localhost:26658";
+const gasPrice = GasPrice.fromString("0.025ucosm");
+
+// Setup client
+const client = await SigningStargateClient.connectWithSigner(rpcEndpoint, wallet);
+
+// Send transaction (using simulate)
+const recipient = "cosmos1xv9tklw7d82sezh9haa573wufgy59vmwe6xxe5";
+const amount = {
+  denom: "ucosm",
+  amount: "1234567",
+};
+const sendMsg: MsgSendEncodeObject = {
+  typeUrl: "/cosmos.bank.v1beta1.MsgSend",
+  value: {
+    fromAddress: account.address,
+    toAddress: recipient,
+    amount: [amount],
+  },
+};
+const memo = "With simulate";
+const gasEstimation = await client.simulate(account.address, [sendMsg], memo);
+const fee = calculateFee(Math.floor(gasEstimation * 1.3), gasPrice);
+const result = await client.sendTokens(account.address, recipient, [amount], fee, memo);
+assertIsBroadcastTxSuccess(result);
+console.log("Successfully broadcasted:", result);
+
+client.disconnect();

packages/cli/run_examples.sh

@@ -15,4 +15,5 @@ yarn node ./bin/cosmwasm-cli --init examples/mask.ts --code "process.exit(0)"
 yarn node ./bin/cosmwasm-cli --init examples/multisig_address.ts --code "process.exit(0)"
 if [ -n "${SIMAPP42_ENABLED:-}" ]; then
   yarn node ./bin/cosmwasm-cli --init examples/stargate.ts --code "process.exit(0)"
+  yarn node ./bin/cosmwasm-cli --init examples/simulate.ts --code "process.exit(0)"
 fi