Document how Haskell receives data from JavaScript

[infinisil]

May be moved or changed in the future, just documenting the current state for development.

For convenience, here are the schemas for attestation and assertion at version 0.5.7 of webauthn-json (only the response part differs, as it should, since the base object is shared)

• Attestation:

  {
  "type": {
    "required": true,
    "schema": "copy"
  },
  "id": {
    "required": true,
    "schema": "copy"
  },
  "rawId": {
    "required": true,
    "schema": "convert"
  },
  "response": {
    "required": true,
    "schema": {
      "clientDataJSON": {
        "required": true,
        "schema": "convert"
      },
      "attestationObject": {
        "required": true,
        "schema": "convert"
      }
    }
  },
  "clientExtensionResults": {
    "required": true,
    "schema": {
      "appid": {
        "required": false,
        "schema": "copy"
      },
      "appidExclude": {
        "required": false,
        "schema": "copy"
      },
      "credProps": {
        "required": false,
        "schema": "copy"
      }
    }
  }
  }

• Assertion:

  {
  "type": {
    "required": true,
    "schema": "copy"
  },
  "id": {
    "required": true,
    "schema": "copy"
  },
  "rawId": {
    "required": true,
    "schema": "convert"
  },
  "response": {
    "required": true,
    "schema": {
      "clientDataJSON": {
        "required": true,
        "schema": "convert"
      },
      "authenticatorData": {
        "required": true,
        "schema": "convert"
      },
      "signature": {
        "required": true,
        "schema": "convert"
      },
      "userHandle": {
        "required": true,
        "schema": "convert"
      }
    }
  },
  "clientExtensionResults": {
    "required": true,
    "schema": {
      "appid": {
        "required": false,
        "schema": "copy"
      },
      "appidExclude": {
        "required": false,
        "schema": "copy"
      },
      "credProps": {
        "required": false,
        "schema": "copy"
      }
    }
  }
  }