Add a deployment script for app development purposes (#83)

- Hardhat: add ACCOUNTS_BALANCE to change the default accounts ETH balance.
- Hardhat: add a script to deploy contracts for app development purposes.

contracts/hardhat.config.js

@@ -3,8 +3,16 @@ require("@nomicfoundation/hardhat-toolbox");
 require("@nomiclabs/hardhat-truffle5");
 require("solidity-coverage");
 
-const accounts = require("./hardhatAccountsList2k.js");
-const accountsList = accounts.accountsList;
+function accounts() {
+  const { accountsList } = require("./hardhatAccountsList2k.js");
+  const balanceStr = process.env.ACCOUNTS_BALANCE?.trim();
+  return balanceStr
+    ? accountsList.map((account) => ({
+      ...account,
+      balance: String(BigInt(balanceStr) * 10n ** 18n),
+    }))
+    : accountsList;
+}
 
 /** @type import('hardhat/config').HardhatUserConfig */
 module.exports = {
@@ -23,7 +31,7 @@ module.exports = {
   },
   networks: {
     hardhat: {
-      accounts: accountsList,
+      accounts: accounts(),
       gas: 10000000,
       blockGasLimit: 15000000,
       gasPrice: 20000000000,

contracts/hardhatAccountsList2k.js

@@ -1,4 +1,4 @@
-const _1e36Str = "1000000000000000000000000000000000000"
+const _1e36Str = String(10n ** 36n)
 
 const accountsList = 
 

contracts/utils/deploymentDev.js

@@ -0,0 +1,75 @@
+const hre = require("hardhat");
+const { deployLiquityCoreHardhat, connectCoreContracts } = require("./deploymentHelpers.js");
+
+// Deploy Liquity contracts for development purposes
+async function main() {
+  const contracts = await deployLiquityCoreHardhat();
+  await connectCoreContracts(contracts);
+
+  const accounts = await hre.ethers.getSigners();
+
+  // list of [debt, coll] tuples
+  const trovesParams = [
+    [1_800n, 20n],
+    [2_800n, 32n],
+    [4_000n, 30n],
+    [6_000n, 65n],
+    [5_000n, 50n],
+    [2_400n, 37n],
+  ];
+
+  // open troves
+  await Promise.all(trovesParams.map(async ([debt, coll], index) => {
+    const account = await accounts[index].getAddress();
+    return contracts.borrowerOperations.openTrove(
+      String(100n * 10n ** 16n), // 100%
+      String(debt * 10n ** 18n),
+      account,
+      account,
+      String(5n * 10n ** 16n), // 5%
+      {
+        from: account,
+        value: String(coll * 10n ** 18n),
+      },
+    );
+  }));
+
+  let namesWidth = 0;
+  const contractsLog = [];
+  for (const contract of Object.values(contracts)) {
+    const { contractName } = contract.constructor;
+    contractsLog.push([contractName, contract.address]);
+    namesWidth = Math.max(namesWidth, contractName.length);
+  }
+
+  console.log("");
+  console.log("Core contracts deployed.");
+  console.log("");
+  console.log(
+    contractsLog
+      .map(([name, address]) => `${name.padEnd(namesWidth)}  ${address}`)
+      .join("\n"),
+  );
+  console.log("");
+
+  console.log("Frontend vars (put this in frontend/*.env):");
+  console.log("");
+  console.log(
+    contractsLog
+      .map(([name, address]) => envVarContract(name, address))
+      .join("\n"),
+  );
+  console.log("");
+}
+
+function envVarContract(name, address) {
+  const envVarEnd = name.replace(/[A-Z]/g, (s) => "_" + s);
+  return `NEXT_PUBLIC_CONTRACT${envVarEnd.toUpperCase()}=${address}`;
+}
+
+main()
+  .then(() => process.exit(0))
+  .catch((error) => {
+    console.error(error);
+    process.exit(1);
+  });