adding sdk-core engram

.github/stale.yml

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+# Configuration for probot-stale - https://github.com/probot/stale
+
+issues:
+  # Number of days of inactivity before an Issue or Pull Request becomes stale
+  daysUntilStale: 7 
+
+  # Number of days of inactivity before an Issue or Pull Request with the stale label is closed.
+  # Set to false to disable. If disabled, issues still need to be closed manually, but will remain marked as stale.
+  daysUntilClose: 7
+
+  # Only issues or pull requests with all of these labels are check if stale. Defaults to `[]` (disabled)
+  onlyLabels:
+    - question
+    - autoclose
+
+  # Issues or Pull Requests with these labels will never be considered stale. Set to `[]` to disable
+  exemptLabels:
+    - p0
+    - bug
+
+  # Comment to post when marking as stale. Set to `false` to disable
+  markComment: >
+    This issue has been automatically marked as stale because it has not had
+    recent activity. It will be closed if no further activity occurs. Thank you
+    for your contributions.

.github/workflows/lint.yml

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+name: Lint
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  run-linters:
+    name: Run linters
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out Git repository
+        uses: actions/checkout@v2
+
+      - name: Set up node
+        uses: actions/setup-node@v2
+        with:
+          node-version: 12
+
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
+
+      - name: Run linters
+        uses: wearerequired/lint-action@a8497ddb33fb1205941fd40452ca9fff07e0770d
+        with:
+          github_token: ${{ secrets.github_token }}
+          prettier: true
+          auto_fix: true
+          prettier_extensions: 'css,html,js,json,jsx,md,sass,scss,ts,tsx,vue,yaml,yml'

.github/workflows/unit-tests.yml

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+name: Unit Tests
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  tests:
+    name: Unit tests
+    strategy:
+      matrix:
+        node: ['10.x', '12.x', '14.x']
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Setup node
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node }}
+
+      - name: Get cache directory
+        id: yarn-cache
+        run: echo "::set-output name=dir::$(yarn cache dir)"
+
+      - name: Cache yarn dependencies
+        uses: actions/cache@v1
+        with:
+          path: ${{ steps.yarn-cache.outputs.dir }}
+          key: yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            yarn-
+
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
+
+      - name: Run tests
+        run: yarn test

.gitignore

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+dist
+node_modules

.prettierignore

@@ -0,0 +1 @@
+.github

.yarnrc

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+ignore-scripts true

LICENSE

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+MIT License
+
+Copyright (c) 2021 Uniswap Labs
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# Uniswap SDK Core
+
+[![Unit Tests](https://github.com/Uniswap/uniswap-sdk-core/workflows/Unit%20Tests/badge.svg)](https://github.com/Uniswap/uniswap-sdk-core/actions?query=workflow%3A%22Unit+Tests%22)
+[![Lint](https://github.com/Uniswap/uniswap-sdk-core/workflows/Lint/badge.svg)](https://github.com/Uniswap/uniswap-sdk-core/actions?query=workflow%3ALint)
+[![npm version](https://img.shields.io/npm/v/@uniswap/sdk-core/latest.svg)](https://www.npmjs.com/package/@uniswap/sdk-core/v/latest)
+[![npm bundle size (scoped version)](https://img.shields.io/bundlephobia/minzip/@uniswap/sdk-core/latest.svg)](https://bundlephobia.com/result?p=@uniswap/sdk-core@latest)
+
+This code is shared across Uniswap TypeScript SDKs.

package.json

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+{
+  "name": "@uniswap/sdk-core",
+  "license": "MIT",
+  "version": "4.0.10",
+  "description": "⚒️ An SDK for building applications on top of Uniswap V3",
+  "main": "dist/index.js",
+  "typings": "dist/index.d.ts",
+  "files": [
+    "dist"
+  ],
+  "repository": "https://github.com/Uniswap/uniswap-sdk-core.git",
+  "keywords": [
+    "uniswap",
+    "ethereum"
+  ],
+  "module": "dist/sdk-core.esm.js",
+  "scripts": {
+    "build": "tsdx build",
+    "start": "tsdx watch",
+    "test": "tsdx test",
+    "prepublishOnly": "tsdx build"
+  },
+  "dependencies": {
+    "@ethersproject/address": "^5.0.2",
+    "big.js": "^5.2.2",
+    "decimal.js-light": "^2.5.0",
+    "jsbi": "^3.1.4",
+    "tiny-invariant": "^1.1.0",
+    "toformat": "^2.0.0"
+  },
+  "devDependencies": {
+    "@types/big.js": "^4.0.5",
+    "@types/jest": "^24.0.25",
+    "tsdx": "^0.14.1"
+  },
+  "engines": {
+    "node": ">=10"
+  },
+  "prettier": {
+    "printWidth": 120,
+    "semi": false,
+    "singleQuote": true
+  }
+}