ast

working with ASTs

1 edit the fixture

edit ./scripts/fixture.ts, for example:

// ./scripts/fixture.ts
export interface InstantiateMsg {
    admin?: string | null;
    members: Member[];
}

2 run AST generator

yarn test:ast

3 look at the JSON produced

code ./scripts/test-output.json

We use the npm module ast-stringify to strip out unnecessary props, and generate a JSON for reference.

You will see a File and Program... only concern yourself with the body[]:

{
  "type": "File",
  "errors": [],
  "program": {
    "type": "Program",
    "sourceType": "module",
    "interpreter": null,
    "body": [
      {
        "type": "ExportNamedDeclaration",
        "exportKind": "type",
        "specifiers": [],
        "source": null,
        "declaration": {
          "type": "TSInterfaceDeclaration",
          "id": {
            "type": "Identifier",
            "name": "InstantiateMsg"
          },
          "body": {
            "type": "TSInterfaceBody",
            "body": [
              {
                "type": "TSPropertySignature",
                "key": {
                  "type": "Identifier",
                  "name": "admin"
                },
                "computed": false,
                "optional": true,
                "typeAnnotation": {
                  "type": "TSTypeAnnotation",
                  "typeAnnotation": {
                    "type": "TSUnionType",
                    "types": [
                      {
                        "type": "TSStringKeyword"
                      },
                      {
                        "type": "TSNullKeyword"
                      }
                    ]
                  }
                }
              },
              {
                "type": "TSPropertySignature",
                "key": {
                  "type": "Identifier",
                  "name": "members"
                },
                "computed": false,
                "typeAnnotation": {
                  "type": "TSTypeAnnotation",
                  "typeAnnotation": {
                    "type": "TSArrayType",
                    "elementType": {
                      "type": "TSTypeReference",
                      "typeName": {
                        "type": "Identifier",
                        "name": "Member"
                      }
                    }
                  }
                }
              }
            ]
          }
        }
      }
    ],
    "directives": []
  },
  "comments": []
}

4 code with @babel/types using the JSON as a reference

NOTE: 4 continued ideally you should be writing a test with your generator!

import * as t from "@babel/types";

export const createNewGenerator = () => {
  return t.exportNamedDeclaration(
    t.tsInterfaceDeclaration(
      t.identifier("InstantiateMsg"),
      null,
      [],
      t.tsInterfaceBody([
        // ... more code ...
      ])
    )
  );
};

Interchain JavaScript Stack

A unified toolkit for building applications and smart contracts in the Interchain ecosystem ⚛️

Category	Tools	Description
Chain Information	Chain Registry, Utils, Client	Everything from token symbols, logos, and IBC denominations for all assets you want to support in your application.
Wallet Connectors	Interchain Kitbeta, Cosmos Kit	Experience the convenience of connecting with a variety of web3 wallets through a single, streamlined interface.
Signing Clients	InterchainJSbeta, CosmJS	A single, universal signing interface for any network
SDK Clients	Telescope	Your Frontend Companion for Building with TypeScript with Cosmos SDK Modules.
Starter Kits	Create Interchain Appbeta, Create Cosmos App	Set up a modern Interchain app by running one command.
UI Kits	Interchain UI	The Interchain Design System, empowering developers with a flexible, easy-to-use UI kit.
Testing Frameworks	Starship	Unified Testing and Development for the Interchain.
TypeScript Smart Contracts	Create Hyperweb App	Build and deploy full-stack blockchain applications with TypeScript
CosmWasm Contracts	CosmWasm TS Codegen	Convert your CosmWasm smart contracts into dev-friendly TypeScript classes.

Credits

🛠 Built by the Constructive team — makers of Hyperweb

Disclaimer

AS DESCRIBED IN THE LICENSES, THE SOFTWARE IS PROVIDED “AS IS”, AT YOUR OWN RISK, AND WITHOUT WARRANTIES OF ANY KIND.

No developer or entity involved in creating this software will be liable for any claims or damages whatsoever associated with your use, inability to use, or your interaction with other users of the code, including any direct, indirect, incidental, special, exemplary, punitive or consequential damages, or loss of profits, cryptocurrencies, tokens, or anything else of value.