Add deploy_contract utility (oasislabs#139)

Author: nhynes

tests/deploy_contract/.gitignore

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+node_modules/

tests/deploy_contract/README.md

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+# deploy_contract.js
+
+Deploys a contract stored on disk to a web3 gateway.
+
+## Usage
+
+First `npm install -g .`.
+Then `deploy_contract /path/to/contract`.
+
+Parameters:
+
+* `--gateway`: HTTP URL of web3 gateway [default: http://localhost:8545]
+* `--dump-json`: print cURLable JSON to stdout

tests/deploy_contract/deploy_contract.js

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+#!/usr/bin/env node
+
+let fs = require('fs');
+let program = require('commander');
+let Web3 = require('web3');
+let Tx = require('ethereumjs-tx');
+
+const web3 = new Web3(new Web3.providers.HttpProvider(program.gateway));
+web3.eth.defaultAccount = '0x1cca28600d7491365520b31b466f88647b9839ec';
+
+// private key corresponding to defaultAccount. generated from mnemonic:
+// patient oppose cotton portion chair gentle jelly dice supply salmon blast priority
+const PRIVATE_KEY = new Buffer('c61675c22aee77da8f6e19444ece45557dc80e1482aa848f541e94e3e5d91179', 'hex');
+
+program
+  .option('--gateway <gateway>', 'gateway http address', 'http://localhost:8545')
+  .option('--dump-json', 'dump cURLable json')
+  .parse(process.argv);
+
+const contractFilename = program.args[0] || fs.readdirSync('target').reduce((f, d) => {
+  return f || (d.endsWith('.wasm') && 'target/' + d);
+}, undefined);
+
+const contract = fs.readFileSync(contractFilename).toString('hex');
+
+web3.eth.getTransactionCount(web3.eth.defaultAccount).then(nonce => {
+  const tx = new Tx({
+    data: '0x' + contract.toString('hex'),
+    gasLimit: '0xfffffffffffff',
+    gasPrice: 0,
+    nonce: nonce,
+    value: 0,
+  });
+  tx.sign(PRIVATE_KEY);
+
+  let serializedTx = '0x' + tx.serialize().toString('hex');
+
+  if (program.dumpJson) {
+    console.log(JSON.stringify({
+      jsonrpc: '2.0',
+      id: 2,
+      method: 'eth_sendRawTransaction',
+      params: [serializedTx],
+    }));
+    return;
+  }
+
+  return web3.eth.sendSignedTransaction(serializedTx).then(receipt => {
+    console.log(receipt);
+  });
+}).catch(err => {
+  console.error('ERROR: Could not deploy contract')
+  console.error(err)
+});

tests/deploy_contract/package-lock.json

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+{
+  "name": "deploy_contract",
+  "version": "1.0.0",
+  "description": "",
+  "main": "deploy_contract.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "bin": {
+    "deploy_contract": "./deploy_contract.js"
+  },
+  "license": "MIT",
+  "dependencies": {
+    "commander": "^2.17.1",
+    "ethereumjs-tx": "^1.3.7",
+    "web3": "^1.0.0-beta.35"
+  }
+}