From bc87f8e87adc070c77855421e7970215c19919d7 Mon Sep 17 00:00:00 2001
From: Simon Warta <simon@warta.it>
Date: Thu, 6 Feb 2020 17:46:40 +0100
Subject: [PATCH] Add some code snippets

---
 .eslintignore                         |  1 +
 packages/cli/README.md                | 38 +++++++++++++++++++++++++--
 packages/cli/examples/local_faucet.ts | 21 +++++++++++++++
 packages/cli/package.json             |  1 +
 packages/cli/src/cli.ts               | 34 +++++++++++++++++++++++-
 5 files changed, 92 insertions(+), 3 deletions(-)
 create mode 100644 packages/cli/examples/local_faucet.ts

diff --git a/.eslintignore b/.eslintignore
index f373a53f..6942c0df 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -4,5 +4,6 @@ build/
 custom_types/
 dist/
 docs/
+examples/
 generated/
 types/
diff --git a/packages/cli/README.md b/packages/cli/README.md
index 474ba32c..40da3cca 100644
--- a/packages/cli/README.md
+++ b/packages/cli/README.md
@@ -39,8 +39,42 @@ $ cosmwasm-cli
 ## Getting started
 
 1. Install `@cosmwasm/cli` and run `cosmwasm-cli` as shown above
-2. TODO: write README inspired by
-   https://github.com/iov-one/iov-core/blob/master/packages/iov-cli/README.md
+2. Start a local wasmd blockchain
+3. Start with `./bin/cosmwasm-cli --init examples/local_faucet.ts`
+4. Play around as in the following example code
+
+```ts
+// Get account information
+const account = (await client.authAccounts(faucetAddress)).result.value;
+
+// Craft a send transaction
+const emptyAddress = Bech32.encode("cosmos", Random.getBytes(20));
+const memo = "My first contract on chain";
+const sendTokensMsg: types.MsgSend = {
+  type: "cosmos-sdk/MsgSend",
+  value: {
+    from_address: faucetAddress,
+    to_address: emptyAddress,
+    amount: [
+      {
+        denom: "ucosm",
+        amount: "1234567",
+      },
+    ],
+  },
+};
+
+const signBytes = makeSignBytes([sendTokensMsg], defaultFee, defaultNetworkId, memo, account) as SignableBytes;
+const rawSignature = await wallet.createTransactionSignature(signer, signBytes, PrehashType.Sha256);
+const signature = encodeSecp256k1Signature(signer.pubkey.data, rawSignature);
+const signedTx: types.StdTx = {
+    msg: [sendTokensMsg],
+    fee: defaultFee,
+    memo: memo,
+    signatures: [signature],
+  }
+const postResult = await client.postTx(marshalTx(signedTx));
+```
 
 ## License
 
diff --git a/packages/cli/examples/local_faucet.ts b/packages/cli/examples/local_faucet.ts
new file mode 100644
index 00000000..2b6c6522
--- /dev/null
+++ b/packages/cli/examples/local_faucet.ts
@@ -0,0 +1,21 @@
+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 faucetPath = HdPaths.cosmos(0);
+const faucetAddress = "cosmos1pkptre7fdkl6gfrzlesjjvhxhlc3r4gmmk8rs6";
+
+const wallet = Secp256k1HdWallet.fromMnemonic(faucetMnemonic);
+const signer = await wallet.createIdentity("unused_value" as ChainId, faucetPath);
+
+const client = new RestClient(defaultHttpUrl);
diff --git a/packages/cli/package.json b/packages/cli/package.json
index 575934a3..826a6326 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -34,6 +34,7 @@
   ],
   "dependencies": {
     "@cosmwasm/sdk": "^0.0.3",
+    "@iov/bcp": "^2.0.0-alpha.7",
     "@iov/crypto": "^2.0.0-alpha.7",
     "@iov/encoding": "^2.0.0-alpha.7",
     "@iov/keycontrol": "^2.0.0-alpha.7",
diff --git a/packages/cli/src/cli.ts b/packages/cli/src/cli.ts
index 5aba2625..57ecd587 100644
--- a/packages/cli/src/cli.ts
+++ b/packages/cli/src/cli.ts
@@ -1,6 +1,7 @@
 import { ArgumentParser } from "argparse";
 // tslint:disable-next-line:no-submodule-imports
 import colors = require("colors/safe");
+import * as fs from "fs";
 import { join } from "path";
 
 import { TsRepl } from "./tsrepl";
@@ -11,6 +12,10 @@ export function main(originalArgs: readonly string[]): void {
     action: "storeTrue",
     help: "Print version and exit",
   });
+  parser.addArgument("--init", {
+    metavar: "FILEPATH",
+    help: "Read initial TypeScript code from file",
+  });
 
   const maintainerGroup = parser.addArgumentGroup({
     title: "Maintainer options",
@@ -33,7 +38,30 @@ export function main(originalArgs: readonly string[]): void {
   }
 
   const imports = new Map<string, readonly string[]>([
-    ["@cosmwasm/sdk", ["types", "RestClient"]],
+    ["@cosmwasm/sdk", ["encodeSecp256k1Signature", "makeSignBytes", "marshalTx", "types", "RestClient"]],
+    [
+      "@iov/bcp",
+      [
+        "Address",
+        "Algorithm",
+        "ChainId",
+        "Nonce",
+        "PrehashType",
+        "PubkeyBytes",
+        "SendTransaction",
+        "SignableBytes",
+        "TokenTicker",
+        "TransactionId",
+        // block info
+        "BlockInfoPending",
+        "BlockInfoSucceeded",
+        "BlockInfoFailed",
+        "BlockInfo",
+        "isBlockInfoPending",
+        "isBlockInfoSucceeded",
+        "isBlockInfoFailed",
+      ],
+    ],
     [
       "@iov/crypto",
       [
@@ -134,6 +162,10 @@ export function main(originalArgs: readonly string[]): void {
     `;
   }
 
+  if (args.init) {
+    init += fs.readFileSync(args.init, "utf8") + "\n";
+  }
+
   const tsconfigPath = join(__dirname, "..", "tsconfig_repl.json");
   const installationDir = join(__dirname, "..");
   new TsRepl(tsconfigPath, init, !!args.debug, installationDir).start().catch(error => {