Start with some helpers

packages/cli/examples/helpers.ts

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+/* eslint-disable @typescript-eslint/camelcase */
+import {
+  logs,
+} from "@cosmwasm/sdk";
+
+const defaultHttpUrl = "http://localhost:1317";
+const defaultNetworkId = "testing";
+const defaultFee: types.StdFee = {
+  amount: [
+    {
+      amount: "5000",
+      denom: "ucosm",
+    },
+  ],
+  gas: "890000",
+};
+
+const faucetMnemonic =
+  "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 faucetAddress = "cosmos1pkptre7fdkl6gfrzlesjjvhxhlc3r4gmmk8rs6";
+
+const pen = await Secp256k1Pen.fromMnemonic(faucetMnemonic);
+const client = new RestClient(defaultHttpUrl);
+
+const networkId = "testing";
+
+
+// helper functions
+async function instantiateContract(initClient: RestClient, initPen: Secp256k1Pen, codeId: number, msg: object, transferAmount?: types.Coin[]): Promise<string> {
+  const memo = "Create an ERC20 instance";
+  const sender = encodeAddress({ "type": "tendermint/Secp256k1PubKey", "value": toBase64(initPen.pubkey)}, "cosmos");
+  const instantiateContractMsg = {
+    type: "wasm/instantiate",
+    value: {
+      sender: sender,
+      code_id: codeId.toString(),
+      init_msg: msg,
+      init_funds: transferAmount || [],
+    },
+  };
+  const account = (await initClient.authAccounts(faucetAddress)).result.value;
+  const signBytes = makeSignBytes([instantiateContractMsg], defaultFee, networkId, memo, account);
+  const signature = encodeSecp256k1Signature(initPen.pubkey, await initPen.createSignature(signBytes));
+  const signedTx = {
+    msg: [instantiateContractMsg],
+    fee: defaultFee,
+    memo: memo,
+    signatures: [signature],
+  };
+  const result = await initClient.postTx(marshalTx(signedTx));
+  if (result.code) {
+    throw new Error(`Failed tx: (${result.code}): ${result.raw_log}`)
+  }
+  const instantiationLogs = logs.parseLogs(result.logs);
+  const contractAddress = logs.findAttribute(instantiationLogs, "message", "contract_address").value;
+  return contractAddress;
+}
+
+// helper functions
+async function executeContract(execClient: RestClient, execPen: Secp256k1Pen, contractAddr: string, msg: object, transferAmount?: types.Coin[]): Promise<readonly logs.Log[]> {
+  const memo = "Create an ERC20 instance";
+  const sender = encodeAddress({ "type": "tendermint/Secp256k1PubKey", "value": toBase64(execPen.pubkey)}, "cosmos");
+  const instantiateContractMsg = {
+    type: "wasm/execute",
+    value: {
+      sender: sender,
+      contract: contractAddr,
+      msg: msg,
+      sent_funds: transferAmount || [],
+    },
+  };
+  const account = (await execClient.authAccounts(faucetAddress)).result.value;
+  const signBytes = makeSignBytes([instantiateContractMsg], defaultFee, networkId, memo, account);
+  const signature = encodeSecp256k1Signature(execPen.pubkey, await execPen.createSignature(signBytes));
+  const signedTx = {
+    msg: [instantiateContractMsg],
+    fee: defaultFee,
+    memo: memo,
+    signatures: [signature],
+  };
+  const result = await execClient.postTx(marshalTx(signedTx));
+  if (result.code) {
+    throw new Error(`Failed tx: (${result.code}): ${result.raw_log}`)
+  }
+  const execLogs = logs.parseLogs(result.logs);
+  return execLogs;
+}
+

scripts/guide.md

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+## Setup
+
+```sh
+node ./scripts/cosm/deploy_erc20.js
+```
+
+## Make account
+
+```sh
+cd packages/cli
+./bin/cosmwasm-cli --init examples/helpers.ts
+```
+
+Now, check it and init/execute contracts:
+
+```js
+const account = (await client.authAccounts(faucetAddress)).result.value;
+account
+
+client.listCodeInfo()
+client.listContractAddresses()
+
+// query this contract
+const addr = (await client.listContractAddresses())[0]
+const info = await client.getContractInfo(addr)
+info.init_msg
+
+// try some actions
+client.queryContractSmart(addr, { balance: { address: faucetAddress } })
+
+// make a new contract
+```