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.