import {Validator, ValidatorResult} from 'jsonschema'; import {ecSignatureSchema, ecSignatureParameter} from '../schemas/ec_signature_schema'; import {addressSchema, numberSchema, orderSchema, signedOrderSchema} from '../schemas/order_schemas'; import {tokenSchema} from '../schemas/token_schema'; export class SchemaValidator { private validator: Validator; // In order to validate a complex JS object using jsonschema, we must replace any complex // sub-types (e.g BigNumber) with a simpler string represenation. Since BigNumber and other // complex types implement the `toString` method, we can stringify the object and // then parse it. The resultant object can then be checked using jsonschema. public static convertToJSONSchemaCompatibleObject(obj: object): object { return JSON.parse(JSON.stringify(obj)); } constructor() { this.validator = new Validator(); this.validator.addSchema(tokenSchema, tokenSchema.id); this.validator.addSchema(orderSchema, orderSchema.id); this.validator.addSchema(numberSchema, numberSchema.id); this.validator.addSchema(addressSchema, addressSchema.id); this.validator.addSchema(ecSignatureSchema, ecSignatureSchema.id); this.validator.addSchema(signedOrderSchema, signedOrderSchema.id); this.validator.addSchema(ecSignatureParameter, ecSignatureParameter.id); } public validate(instance: object, schema: Schema): ValidatorResult { return this.validator.validate(instance, schema); } }