How could I teach codegen new types (from thegraph protocol)?

[samlaf]

Hi,

I need to query a graphql endpoint generated by thegraph protocol: https://thegraph.com/en/
The schema that I am interested in is found here: https://github.com/QuickSwap/QuickSwap-subgraph/blob/master/schema.graphql
When I run the codegen, I get errors because BigInt, BigDecimal, etc. types are not defined:

  ✔ Parse configuration
  ❯ Generate outputs
    ❯ Generate src/generated/graphql.ts
      ✖ Load GraphQL schemas
        → Failed to load schema
        Load GraphQL documents
        Generate


 Found 1 error

  ✖ src/generated/graphql.ts
    Failed to load schema from schema.graphql:

        Unknown type: "BigInt".
        Error: Unknown type: "BigInt".
    at getNamedType (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_mod
ules/graphql/utilities/extendSchema.js:360:13)
    at getWrappedType (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_m
odules/graphql/utilities/extendSchema.js:375:12)
    at getWrappedType (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_m
odules/graphql/utilities/extendSchema.js:372:45)
    at buildFieldMap (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_mo
dules/graphql/utilities/extendSchema.js:409:17)
    at fields (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_modules/g
raphql/utilities/extendSchema.js:561:22)
    at resolveThunk (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_mod
ules/graphql/type/definition.js:480:40)
    at defineFieldMap (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_m
odules/graphql/type/definition.js:692:18)
    at GraphQLObjectType.getFields (/home/samlaf/devel/ethereum/thegraph-tut/qui
ckswap/node_modules/graphql/type/definition.js:633:27)
    at collectReferencedTypes (/home/samlaf/devel/ethereum/thegraph-tut/quickswa
p/node_modules/graphql/type/schema.js:366:81)
    at new GraphQLSchema (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/nod
e_modules/graphql/type/schema.js:148:9)

        GraphQL Code Generator supports:
          - ES Modules and CommonJS exports (export as default or named export "
schema")
          - Introspection JSON File
          - URL of GraphQL endpoint
          - Multiple files with type definitions (glob expression)
          - String in config file

        Try to use one of above options and run codegen again.
    Error: Failed to load schema
        at loadSchema (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_m
odules/@graphql-codegen/cli/bin.js:509:15)
        at async /home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_modules
/@graphql-codegen/cli/bin.js:1039:65
        at async /home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_modules
/@graphql-codegen/cli/bin.js:1038:52
        at async /home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_modules
/@graphql-codegen/cli/bin.js:925:21
    Error: Failed to load schema
        at loadSchema (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_m
odules/@graphql-codegen/cli/bin.js:509:15)
        at async /home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_modules
/@graphql-codegen/cli/bin.js:1039:65
        at async /home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_modules
/@graphql-codegen/cli/bin.js:1038:52
        at async /home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_modules
/@graphql-codegen/cli/bin.js:925:21


Something went wrong Failed to load schema for "src/generated/graphql.ts"
        Failed to load schema from schema.graphql:

        Unknown type: "BigInt".
        Error: Unknown type: "BigInt".
    at getNamedType (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_modules/graphql/utilities/extendSchema.js:360:13)
    at getWrappedType (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_modules/graphql/utilities/extendSchema.js:375:12)
    at getWrappedType (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_modules/graphql/utilities/extendSchema.js:372:45)
    at buildFieldMap (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_modules/graphql/utilities/extendSchema.js:409:17)
    at fields (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_modules/graphql/utilities/extendSchema.js:561:22)
    at resolveThunk (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_modules/graphql/type/definition.js:480:40)
    at defineFieldMap (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_modules/graphql/type/definition.js:692:18)
    at GraphQLObjectType.getFields (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_modules/graphql/type/definition.js:633:27)
    at collectReferencedTypes (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_modules/graphql/type/schema.js:366:81)
    at new GraphQLSchema (/home/samlaf/devel/ethereum/thegraph-tut/quickswap/node_modules/graphql/type/schema.js:148:9)
    
        GraphQL Code Generator supports:
          - ES Modules and CommonJS exports (export as default or named export "schema")
          - Introspection JSON File
          - URL of GraphQL endpoint
          - Multiple files with type definitions (glob expression)
          - String in config file
    
        Try to use one of above options and run codegen again.

I've looked throughout their repos (https://github.com/search?q=org%3Agraphprotocol+schema.graphql&type=code) and can't seem to find any schema.graphql file that would define these types, so I am guessing that their cli tool graph codegen that reads the schema.graphql files parses them differently than graphql-code-generator.

Is there an easy way to extend graphql-code-generator to add these types? How should I go about this?

[samlaf]

Seems like I can just add

scalar BigDecimal
scalar BigInt
scalar Bytes

type Query {
  tokens(first: Int): [Token]
  # add all other possible graphql queries: https://thegraph.com/docs/en/developer/graphql-api/
}

to the top of my schema.graphql file