@cosmwasm/ts-codegen-ast

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 unneccesary 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 ...
            ])
        )
    );
};

Related

Checkout these related projects:

• @cosmology/telescope Your Frontend Companion for Building with TypeScript with Cosmos SDK Modules.
• @cosmwasm/ts-codegen Convert your CosmWasm smart contracts into dev-friendly TypeScript classes.
• chain-registry Everything from token symbols, logos, and IBC denominations for all assets you want to support in your application.
• cosmos-kit Experience the convenience of connecting with a variety of web3 wallets through a single, streamlined interface.
• create-cosmos-app Set up a modern Cosmos app by running one command.
• interchain-ui The Interchain Design System, empowering developers with a flexible, easy-to-use UI kit.
• starship Unified Testing and Development for the Interchain.

Credits

🛠 Built by Cosmology — if you like our tools, please consider delegating to our validator ⚛️

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.