@turnkey/eip-1193-provider/dist/utils.mjs

EIP-1193 Provider for Turnkey.

import { serializeTransaction } from 'viem';
import { ChainIdAlreadyAddedError, InvalidChainIdFormatError, ChainIdValueExceedsError, InvalidRpcUrlError, BlockExplorerUrlError, NativeCurrencySymbolLengthError, NativeCurrencySymbolMismatchError, RpcUrlsRequiredError } from './errors.mjs';

const DEV_ENVS = ["test", "development"];
const preprocessTransaction = ({ from, ...transaction }) => {
    // Helper function to handle undefined values and conversion
    const convertValue = (value, converter, defaultValue) => (value !== undefined ? converter(value) : defaultValue);
    const typeMapping = {
        "0x0": "legacy",
        "0x1": "eip2930",
        "0x2": "eip1559",
        // TODO: enable these once ready
        // "0x3": "eip4844",
        // "0x4": "eip7702",
    };
    const processedTransaction = {
        ...transaction,
        // @ts-ignore
        chainId: parseInt(transaction.chainId, 16),
        type: (transaction.type && typeMapping[transaction.type]) || "eip1559",
        maxPriorityFeePerGas: convertValue(transaction.maxPriorityFeePerGas, BigInt, 0n),
        maxFeePerGas: convertValue(transaction.maxFeePerGas, BigInt, 0n),
        gasPrice: convertValue(transaction.gasPrice, BigInt, 0n),
        value: convertValue(transaction.value, BigInt, 0n),
        nonce: convertValue(transaction.nonce, (value) => parseInt(value.toString(), 16), 0),
        gas: convertValue(transaction.gas, BigInt, 0n),
    };
    const serializedTransaction = serializeTransaction(processedTransaction);
    return serializedTransaction.replace(/^0x/, "");
};
const isValidUrl = (url) => {
    // Allow http URLs in non-production environments, https URLs in production
    const protocolRegex = DEV_ENVS.includes(process.env.NODE_ENV ?? "")
        ? /^https?:\/\//
        : /^https:\/\//;
    return protocolRegex.test(url);
};
/**
 * Validates the array of RPC URLs provided in the AddEthereumChainParameter.
 * It checks if the array is not empty and if every URL in the array starts with "https://".
 * Throws an RpcUrlsRequiredError if the array is empty or undefined.
 * Throws an InvalidRpcUrlError if any URL in the array does not start with "https://".
 *
 * @param {AddEthereumChainParameter['rpcUrls']} rpcUrls - The array of RPC URLs to validate.
 * @throws {RpcUrlsRequiredError} If the rpcUrls array is empty or undefined.
 * @throws {InvalidRpcUrlError} If any URL in the rpcUrls array is invalid.
 */
const validateRpcUrls = (rpcUrls) => {
    if (!rpcUrls || rpcUrls.length === 0) {
        throw new RpcUrlsRequiredError();
    }
    if (!rpcUrls.every(isValidUrl)) {
        throw new InvalidRpcUrlError();
    }
};
const validateChain = (chain, addedChains) => {
    const { rpcUrls, blockExplorerUrls, chainId, nativeCurrency } = chain;
    if (addedChains.some((c) => c.chainId === chainId)) {
        throw new ChainIdAlreadyAddedError();
    }
    let decimalChainId;
    try {
        decimalChainId = parseInt(chainId, 16);
        // Ensure the chain ID is a 0x-prefixed hexadecimal string and can be parsed to an integer
        if (!/^0x[0-9a-fA-F]+$/.test(chainId) || isNaN(decimalChainId)) {
            throw new InvalidChainIdFormatError(chainId);
        }
    }
    catch (error) {
        throw new InvalidChainIdFormatError(chainId);
    }
    // Validate chain ID value is not greater than max safe integer value
    if (decimalChainId > Number.MAX_SAFE_INTEGER) {
        throw new ChainIdValueExceedsError(chainId);
    }
    validateRpcUrls(rpcUrls);
    // Validate RPC URLs
    if (!rpcUrls || rpcUrls.length === 0 || !rpcUrls.every(isValidUrl)) {
        throw new InvalidRpcUrlError();
    }
    // Validate Block Explorer URLs
    if (blockExplorerUrls &&
        (!Array.isArray(blockExplorerUrls) ||
            blockExplorerUrls.length === 0 ||
            !blockExplorerUrls.every(isValidUrl))) {
        throw new BlockExplorerUrlError();
    }
    // Validate native currency symbol length
    if (nativeCurrency &&
        (nativeCurrency.symbol.length < 2 || nativeCurrency.symbol.length > 6)) {
        throw new NativeCurrencySymbolLengthError(nativeCurrency.symbol);
    }
    // Validate native currency symbol does not mismatch for a network the user already has added with the same chainId
    const existingChain = addedChains.find((c) => c.chainId === chainId);
    if (existingChain &&
        existingChain.nativeCurrency &&
        nativeCurrency &&
        existingChain.nativeCurrency.symbol !== nativeCurrency.symbol) {
        throw new NativeCurrencySymbolMismatchError(nativeCurrency.symbol);
    }
};

export { isValidUrl, preprocessTransaction, validateChain, validateRpcUrls };
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