Add root config

.eslintignore

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+node_modules
+dist
+coverage

.eslintrc.json

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+{
+  "env": {
+    "node": true
+  },
+  "root": true,
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["@typescript-eslint"],
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "prettier"
+  ],
+  "rules": {
+    "comma-dangle": ["error", "always-multiline"],
+    "semi": ["error", "always"],
+    "@typescript-eslint/explicit-module-boundary-types": ["error"],
+    "@typescript-eslint/no-non-null-assertion": ["error"],
+    "@typescript-eslint/no-explicit-any": ["error", { "ignoreRestArgs": true }]
+  }
+}

.github/workflows/ci.yml

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+name: ci
+
+on:
+  # Triggers the workflow on push or pull request events but only for the main branch
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  install:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/cache@v2
+        with:
+          path: .//node_modules
+          key: ${{ runner.os }}-npm-cache-${{ hashFiles('./package-lock.json') }}
+
+      - name: npm-install
+        # Check out the lockfile from main, reinstall, and then
+        # verify the lockfile matches what was committed.
+        run: |
+            npm install
+            CHANGES=$(git status -s)
+            if [[ ! -z $CHANGES ]]; then
+              echo "Changes found: $CHANGES"
+              git diff
+              exit 1
+            fi
+
+  build:
+    runs-on: ubuntu-latest
+    needs: [install]
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: npm-cache
+        uses: actions/cache@v2
+        with:
+          path: .//node_modules
+          key: ${{ runner.os }}-npm-cache-${{ hashFiles('./package-lock.json') }}
+
+      - name: build-cache
+        uses: actions/cache@v2
+        with:
+          path: ./*
+          key: ${{ github.sha }}
+
+      - name: build
+        run: npm run build
+
+  prettier:
+    runs-on: ubuntu-latest
+    needs: [install]
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/cache@v2
+        with:
+          path: .//node_modules
+          key: ${{ runner.os }}-npm-cache-${{ hashFiles('./package-lock.json') }}
+
+      - name: prettier
+        run: |
+          npm run prettier
+          CHANGES=$(git status -s)
+          if [[ ! -z $CHANGES ]]; then
+            echo "Changes found: $CHANGES"
+            exit 1
+          fi
+
+  test:
+    runs-on: ubuntu-latest
+    needs: [build]
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/cache@v2
+        with:
+          path: ./*
+          key: ${{ github.sha }}
+
+      - name: test
+        run: npm run test

.gitignore

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+node_modules/
+cache/
+artifacts/
+types/
+dist/
+coverage/
+coverage.json
+*.swp

.prettierrc

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+{
+  "tabWidth": 2,
+  "singleQuote": true,
+  "trailingComma": "all",
+  "overrides": [
+    {
+      "files": "*.sol",
+      "options": {
+        "printWidth": 80,
+        "tabWidth": 4,
+        "useTabs": false,
+        "singleQuote": false,
+        "bracketSpacing": false,
+        "explicitTypes": "always"
+      }
+    }
+  ]
+}

.solcover.js

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+module.exports = {
+  skipFiles: ["test"],
+};

.solhint.json

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+{
+  "extends": "solhint:recommended",
+  "rules": {
+    "compiler-version": ["error", "^0.6.11"],
+    "func-visibility": ["warn", {"ignoreConstructors":true}],
+    "not-rely-on-time": "off"
+  }
+}

hardhat.config.ts

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+import 'solidity-coverage';
+import '@typechain/hardhat';
+import '@nomiclabs/hardhat-waffle';
+import 'hardhat-gas-reporter';
+import '@abacus-network/hardhat';
+
+/**
+ * @type import('hardhat/config').HardhatUserConfig
+ */
+module.exports = {
+  solidity: {
+    version: '0.7.6',
+    settings: {
+      optimizer: {
+        enabled: true,
+        runs: 999999,
+      },
+    },
+  },
+  gasReporter: {
+    currency: 'USD',
+  },
+  typechain: {
+    outDir: './types',
+    target: 'ethers-v5',
+    alwaysGenerateOverloads: false, // should overloads with full signatures like deposit(uint256) be generated always, even if there are no overloads?
+  },
+};

package.json

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+{
+  "name": "@abacus-network/erc20-token",
+  "version": "0.0.0",
+  "license": "MIT OR Apache-2.0",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "directories": {
+    "test": "test"
+  },
+  "scripts": {
+    "build": "hardhat compile && hardhat typechain && npm run prettier && tsc && npm run copy-types",
+    "test": "hardhat test",
+    "prettier": "prettier --write ./contracts ./test",
+    "copy-types": "cp types/*.d.ts dist/",
+    "coverage": "hardhat coverage"
+  },
+  "dependencies": {
+    "@abacus-network/core": "file:../abacus-monorepo/solidity/core",
+    "@abacus-network/sdk": "file:../abacus-monorepo/typescript/sdk",
+    "@abacus-network/utils": "file:../abacus-monorepo/typescript/utils",
+    "@abacus-network/apps": "file:../abacus-monorepo/solidity/apps",
+    "@ethersproject/bignumber": "^5.5.0",
+    "@ethersproject/bytes": "^5.5.0",
+    "ethers": "^5.4.7"
+  },
+  "devDependencies": {
+    "@abacus-network/hardhat": "file:../abacus-monorepo/typescript/hardhat",
+    "@openzeppelin/contracts": "~3.4.2",
+    "@openzeppelin/contracts-upgradeable": "~3.4.2",
+    "@summa-tx/memview-sol": "^2.0.0",
+    "@nomiclabs/hardhat-ethers": "^2.0.1",
+    "@nomiclabs/hardhat-waffle": "^2.0.1",
+    "@typechain/ethers-v5": "~7.0.0",
+    "@typechain/hardhat": "^2.0.1",
+    "@types/mocha": "^9.1.0",
+    "chai": "^4.3.0",
+    "eslint": "^7.20.0",
+    "hardhat": "^2.8.3",
+    "hardhat-gas-reporter": "^1.0.7",
+    "prettier": "^2.2.1",
+    "prettier-plugin-solidity": "^1.0.0-beta.5",
+    "solhint": "^3.3.2",
+    "solhint-plugin-prettier": "^0.0.5",
+    "solidity-coverage": "^0.7.14",
+    "ts-node": "^10.1.0",
+    "typechain": "^5.0.0",
+    "typescript": "^4.3.5"
+  }
+}

tsconfig.json

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+{
+  "compilerOptions": {
+    "declaration": true,
+    "declarationMap": true,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "incremental": false,
+    "lib": ["es2015", "es5", "dom"],
+    "module": "commonjs",
+    "moduleResolution": "node",
+    "noEmitOnError": true,
+    "noFallthroughCasesInSwitch": true,
+    "noImplicitAny": true,
+    "noImplicitReturns": true,
+    "noUnusedLocals": true,
+    "preserveSymlinks": true,
+    "preserveWatchOutput": true,
+    "pretty": false,
+    "sourceMap": true,
+    "target": "es6",
+    "strict": true,
+    "outDir": "./dist/",
+    "rootDir": "./src/"
+  },
+}