hardhat/dist/src/internal/builtin-plugins/network-manager/rpc/validate-params.js

Hardhat is an extensible developer tool that helps smart contract developers increase productivity by reliably bringing together the tools they want.

import { HardhatError } from "@nomicfoundation/hardhat-errors";
export function validateParams(params, ...types) {
    if (types === undefined && params.length > 0) {
        throw new HardhatError(HardhatError.ERRORS.CORE.NETWORK.WRONG_VALIDATION_PARAMS, {
            reason: `No argument was expected and got ${params.length}`,
        });
    }
    let optionalParams = 0;
    for (let i = types.length - 1; i >= 0; i--) {
        if (types[i].isOptional() || types[i].isNullable()) {
            optionalParams += 1;
        }
        else {
            break;
        }
    }
    if (optionalParams === 0) {
        if (params.length !== types.length) {
            throw new HardhatError(HardhatError.ERRORS.CORE.NETWORK.WRONG_VALIDATION_PARAMS, {
                reason: `Expected exactly ${types.length} arguments and got ${params.length}`,
            });
        }
    }
    else {
        if (params.length > types.length ||
            params.length < types.length - optionalParams) {
            throw new HardhatError(HardhatError.ERRORS.CORE.NETWORK.WRONG_VALIDATION_PARAMS, {
                reason: `Expected between ${types.length - optionalParams} and ${types.length} arguments and got ${params.length}`,
            });
        }
    }
    const decoded = [];
    for (let i = 0; i < types.length; i++) {
        const res = types[i].parse(params[i]);
        decoded.push(res);
    }
    // eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- TypeScript can't infer the complex return type
    return decoded;
}
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