use ethers_core::types::{Address, Chain}; use std::env::VarError; #[derive(Debug, thiserror::Error)] pub enum EtherscanError { #[error("Chain {0} not supported")] ChainNotSupported(Chain), #[error("Contract execution call failed: {0}")] ExecutionFailed(String), #[error("Balance failed")] BalanceFailed, #[error("Transaction receipt failed")] TransactionReceiptFailed, #[error("Gas estimation failed")] GasEstimationFailed, #[error("Bad status code: {0}")] BadStatusCode(String), #[error(transparent)] EnvVarNotFound(#[from] VarError), #[error(transparent)] Reqwest(#[from] reqwest::Error), #[error(transparent)] Serde(#[from] serde_json::Error), #[error("Contract source code not verified: {0}")] ContractCodeNotVerified(Address), #[error("Rate limit exceeded")] RateLimitExceeded, #[error(transparent)] IO(#[from] std::io::Error), #[error("Local networks (e.g. anvil, ganache, geth --dev) cannot be indexed by etherscan")] LocalNetworksNotSupported, #[error("Received error response: status={status},message={message}, result={result:?}")] ErrorResponse { status: String, message: String, result: Option }, #[error("Unknown error: {0}")] Unknown(String), #[error("Missing field: {0}")] Builder(String), #[error("Missing solc version: {0}")] MissingSolcVersion(String), #[error("Invalid API Key")] InvalidApiKey, #[error("Sorry, you have been blocked by Cloudflare, See also https://community.cloudflare.com/t/sorry-you-have-been-blocked/110790")] BlockedByCloudflare, #[error("The Requested prompted a cloudflare captcha security challenge to review the security of your connection before proceeding.")] CloudFlareSecurityChallenge, #[error("Received `Page not found` response. API server is likely down")] PageNotFound, } /// etherscan/polyscan is protected by cloudflare, which can lead to html responses like `Sorry, you have been blocked` See also /// /// This returns true if the `txt` is a cloudflare error response pub(crate) fn is_blocked_by_cloudflare_response(txt: &str) -> bool { txt.to_lowercase().contains("sorry, you have been blocked") } /// etherscan/polyscan is protected by cloudflare, which can require captchas to "review the /// security of your connection before proceeding" pub(crate) fn is_cloudflare_security_challenge(txt: &str) -> bool { txt.contains("https://www.cloudflare.com?utm_source=challenge") || txt.to_lowercase().contains("checking if the site connection is secure") } #[cfg(test)] mod tests { use super::*; #[test] fn test_is_cloudflare_security_challenge() { let res = " Just a moment...

$\"Icon$ api-goerli.etherscan.io

Checking if the site connection is secure

Enable JavaScript and cookies to continue

api-goerli.etherscan.io needs to review the security of your connection before proceeding.

"; assert!(is_cloudflare_security_challenge(res)); } #[test] fn test_cloudflare_response() { let resp = "\n\n\n\n \n\nAttention Required! | Cloudflare\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n

\n \n

Sorry, you have been blocked

You are unable to access polygonscan.com

\n\n

\n \n \n \n

\n\n

Why have I been blocked?

\n\n

This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.

\n\n

What can I do to resolve this?

\n\n

You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.

\n\n \n\n\n

\n\n \n\n\n\n"; assert!(is_blocked_by_cloudflare_response(resp)); } }