packages/resolver/src/resolvers/resolver.ts


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import * as _ from 'lodash';

import { ContractSource } from '../types';

export abstract class Resolver {
    public abstract resolveIfExists(importPath: string): ContractSource | undefined;
    public resolve(importPath: string): ContractSource {
        const contractSourceIfExists = this.resolveIfExists(importPath);
        if (_.isUndefined(contractSourceIfExists)) {
            throw new Error(`Failed to resolve ${importPath}`);
        }
        return contractSourceIfExists;
    }
}