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feat(etherscan): add blocked by cloudflare error (#1703)

This commit is contained in:
Matthias Seitz 2022-09-15 21:44:52 +02:00 committed by GitHub
parent 6b4007f619
commit 63f1742357
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 23 additions and 4 deletions
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9
ethers-etherscan/src/errors.rs
View File

@ -37,4 +37,13 @@ pub enum EtherscanError {
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,
}
/// etherscan/polyscan is protected by cloudflare, which can lead to html responses like `Sorry, you have been blocked` See also <https://community.cloudflare.com/t/sorry-you-have-been-blocked/110790>
///
/// 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")
}

18
ethers-etherscan/src/lib.rs
View File

@ -1,5 +1,6 @@
//! Bindings for [etherscan.io web api](https://docs.etherscan.io/)
use crate::errors::is_blocked_by_cloudflare_response;
use contract::ContractMetadata;
use errors::EtherscanError;
use ethers_core::{
@ -15,6 +16,7 @@ use std::{
time::{Duration, SystemTime, UNIX_EPOCH},
};
use tracing::{error, trace};
pub mod account;
pub mod contract;
pub mod errors;
@ -168,10 +170,14 @@ impl Client {
.text()
.await?;
Ok(serde_json::from_str(&response).map_err(|err| {
serde_json::from_str(&response).map_err(|err| {
error!(target: "etherscan", ?response, "Failed to deserialize response: {}", err);
err
})?)
if is_blocked_by_cloudflare_response(&response) {
EtherscanError::BlockedByCloudflare
} else {
EtherscanError::Serde(err)
}
})
}
/// Execute an API GET request with parameters
@ -189,7 +195,11 @@ impl Client {
let response: ResponseData<T> = serde_json::from_str(&response).map_err(|err| {
error!(target: "etherscan", ?response, "Failed to deserialize response: {}", err);
err
if is_blocked_by_cloudflare_response(&response) {
EtherscanError::BlockedByCloudflare
} else {
EtherscanError::Serde(err)
}
})?;
match response {