packages/order-watcher/src/utils/assert.ts


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import { assert as sharedAssert } from '@0xproject/assert';
// We need those two unused imports because they're actually used by sharedAssert which gets injected here
// tslint:disable:no-unused-variable
import { Schema } from '@0xproject/json-schemas';
import { ECSignature } from '@0xproject/types';
import { BigNumber } from '@0xproject/utils';
// tslint:enable:no-unused-variable

import { isValidSignature } from '@0xproject/order-utils';

export const assert = {
    ...sharedAssert,
    isValidSignature(orderHash: string, ecSignature: ECSignature, signerAddress: string): void {
        const isValid = isValidSignature(orderHash, ecSignature, signerAddress);
        this.assert(isValid, `Expected order with hash '${orderHash}' to have a valid signature`);
    },
};