import * as _ from 'lodash'; import * as BigNumber from 'bignumber.js'; import * as Web3 from 'web3'; import {SchemaValidator} from './schema_validator'; import {utils} from './utils'; const HEX_REGEX = /^0x[0-9A-F]*$/i; export const assert = { isBigNumber(variableName: string, value: BigNumber.BigNumber): void { const isBigNumber = _.isObject(value) && value.isBigNumber; this.assert(isBigNumber, this.typeAssertionMessage(variableName, 'BigNumber', value)); }, isUndefined(value: any, variableName?: string): void { this.assert(_.isUndefined(value), this.typeAssertionMessage(variableName, 'undefined', value)); }, isString(variableName: string, value: string): void { this.assert(_.isString(value), this.typeAssertionMessage(variableName, 'string', value)); }, isHexString(variableName: string, value: string): void { this.assert(_.isString(value) && HEX_REGEX.test(value), this.typeAssertionMessage(variableName, 'HexString', value)); }, isETHAddressHex(variableName: string, value: string): void { const web3 = new Web3(); this.assert(web3.isAddress(value), this.typeAssertionMessage(variableName, 'ETHAddressHex', value)); }, isNumber(variableName: string, value: number): void { this.assert(_.isFinite(value), this.typeAssertionMessage(variableName, 'number', value)); }, isValidOrderHash(variableName: string, value: string): void { this.assert(utils.isValidOrderHash(value), this.typeAssertionMessage(variableName, 'orderHash', value)); }, isBoolean(variableName: string, value: boolean): void { this.assert(_.isBoolean(value), this.typeAssertionMessage(variableName, 'boolean', value)); }, doesConformToSchema(variableName: string, value: object, schema: Schema): void { const schemaValidator = new SchemaValidator(); const validationResult = schemaValidator.validate(value, schema); const hasValidationErrors = validationResult.errors.length > 0; const msg = `Expected ${variableName} to conform to schema ${schema.id} Encountered: ${JSON.stringify(value, null, '\t')} Validation errors: ${validationResult.errors.join(', ')}`; this.assert(!hasValidationErrors, msg); }, assert(condition: boolean, message: string): void { if (!condition) { throw new Error(message); } }, typeAssertionMessage(variableName: string, type: string, value: any): string { return `Expected ${variableName} to be of type ${type}, encountered: ${value}`; }, };