Decode runtime metadata

jest.config.js

@@ -2,7 +2,7 @@ const config = require('@polkadot/dev/config/jest');
 
 module.exports = Object.assign({}, config, {
   moduleNameMapper: {
-    '@polkadot/api-(format|jsonrpc|provider|rx)(.*)$': '<rootDir>/packages/api-$1/src/$2',
+    '@polkadot/api-(codec|format|jsonrpc|provider|rx)(.*)$': '<rootDir>/packages/api-$1/src/$2',
     '@polkadot/api(.*)$': '<rootDir>/packages/api/src/$1',
     '@polkadot/extrinsics(.*)$': '<rootDir>/packages/type-extrinsics/src/$1',
     '@polkadot/jsonrpc(.*)$': '<rootDir>/packages/type-jsonrpc/src/$1',

packages/api-codec/LICENSE

@@ -0,0 +1,15 @@
+ISC License (ISC)
+
+Copyright 2017-2018 @polkadot/api-codec authors & contributors
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.

packages/api-codec/README.md

@@ -0,0 +1,3 @@
+# @polkadot/api-codec
+
+Implementation of the parity-codec

packages/api-codec/package.json

@@ -0,0 +1,35 @@
+{
+  "name": "@polkadot/api-codec",
+  "version": "0.29.7",
+  "description": "Implementation of the Parity codec",
+  "main": "index.js",
+  "keywords": [
+    "Polkadot",
+    "JsonRPC"
+  ],
+  "author": "Jaco Greeff <jacogr@gmail.com>",
+  "maintainers": [
+    "Jaco Greeff <jacogr@gmail.com>"
+  ],
+  "contributors": [],
+  "license": "ISC",
+  "engines": {
+    "node": ">=6.4"
+  },
+  "publishConfig": {
+    "access": "public",
+    "registry": "https://registry.npmjs.org"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/polkadot-js/api.git"
+  },
+  "bugs": {
+    "url": "https://github.com/polkadot-js/api/issues"
+  },
+  "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-codec#readme",
+  "dependencies": {
+    "@babel/runtime": "^7.0.0",
+    "@polkadot/util": "^0.30.4"
+  }
+}