web3-proxy/web3_proxy/src/errors.rs

//! Utlities for logging errors for admins and displaying errors to users.

use crate::block_number::BlockNumOrHash;
use crate::frontend::authorization::Authorization;
use crate::jsonrpc::{self, JsonRpcErrorData, ParsedResponse, StreamResponse};
use crate::response_cache::ForwardedResponse;
use crate::rpcs::blockchain::Web3ProxyBlock;
use crate::rpcs::one::Web3Rpc;
use crate::rpcs::provider::EthersHttpProvider;
use axum::extract::rejection::JsonRejection;
use axum::extract::ws::Message;
use axum::{
    headers,
    http::StatusCode,
    response::{IntoResponse, Response},
    Json,
};
use derive_more::{Display, Error, From};
use ethers::prelude::ContractError;
use ethers::types::{H256, U64};
use http::header::InvalidHeaderValue;
use http::uri::InvalidUri;
use ipnet::AddrParseError;
use migration::sea_orm::DbErr;
use redis_rate_limiter::redis::RedisError;
use redis_rate_limiter::RedisPoolError;
use reqwest::header::ToStrError;
use rust_decimal::Error as DecimalError;
use serde_json::json;
use serde_json::value::RawValue;
use siwe::VerificationError;
use std::sync::Arc;
use std::time::Duration;
use std::{borrow::Cow, net::IpAddr};
use tokio::{sync::AcquireError, task::JoinError, time::Instant};
use tracing::{debug, error, trace, warn};

pub type Web3ProxyResult<T> = Result<T, Web3ProxyError>;
// TODO: take "IntoResponse" instead of Response?
pub type Web3ProxyResponse = Web3ProxyResult<Response>;

impl From<Web3ProxyError> for Web3ProxyResult<()> {
    fn from(value: Web3ProxyError) -> Self {
        Err(value)
    }
}

#[derive(Debug, Display, Error, From)]
pub enum Web3ProxyError {
    Abi(ethers::abi::Error),
    #[error(ignore)]
    #[from(ignore)]
    AccessDenied(Cow<'static, str>),
    #[error(ignore)]
    Anyhow(anyhow::Error),
    Arc(Arc<Self>),
    #[from(ignore)]
    #[display(fmt = "{:?} to {:?}", min, max)]
    ArchiveRequired {
        min: Option<U64>,
        max: Option<U64>,
    },
    #[error(ignore)]
    #[from(ignore)]
    BadRequest(Cow<'static, str>),
    #[error(ignore)]
    #[from(ignore)]
    BadResponse(Cow<'static, str>),
    BadRouting,
    Contract(ContractError<EthersHttpProvider>),
    Database(DbErr),
    DatabaseArc(Arc<DbErr>),
    Decimal(DecimalError),
    EthersHttpClient(ethers::providers::HttpClientError),
    EthersProvider(ethers::prelude::ProviderError),
    EthersWsClient(ethers::prelude::WsClientError),
    #[display(fmt = "{:?} < {}", head, requested)]
    #[from(ignore)]
    FarFutureBlock {
        head: Option<U64>,
        requested: U64,
    },
    GasEstimateNotU256,
    HdrRecord(hdrhistogram::errors::RecordError),
    Headers(headers::Error),
    HeaderToString(ToStrError),
    HttpUri(InvalidUri),
    Hyper(hyper::Error),
    InfluxDb2Request(influxdb2::RequestError),
    #[display(fmt = "{} > {}", min, max)]
    #[from(ignore)]
    InvalidBlockBounds {
        min: u64,
        max: u64,
    },
    InvalidHeaderValue(InvalidHeaderValue),
    InvalidEip,
    InvalidInviteCode,
    Io(std::io::Error),
    UnknownReferralCode,
    InvalidReferer,
    InvalidSignatureLength,
    InvalidUserTier,
    InvalidUserAgent,
    InvalidUserKey,
    IpAddrParse(AddrParseError),
    #[error(ignore)]
    #[from(ignore)]
    IpNotAllowed(IpAddr),
    JoinError(JoinError),
    JsonRejection(JsonRejection),
    #[display(fmt = "{:?}", _0)]
    #[error(ignore)]
    JsonRpcErrorData(JsonRpcErrorData),
    #[from(ignore)]
    #[display(fmt = "{}", _0)]
    MdbxPanic(String, Cow<'static, str>),
    NoBlockNumberOrHash,
    NoBlocksKnown,
    NoConsensusHeadBlock,
    NoDatabaseConfigured,
    NoHandleReady,
    NoServersSynced,
    #[display(fmt = "{}/{}", num_known, min_head_rpcs)]
    #[from(ignore)]
    NotEnoughRpcs {
        num_known: usize,
        min_head_rpcs: usize,
    },
    #[display(fmt = "{}/{}", available, needed)]
    #[from(ignore)]
    NotEnoughSoftLimit {
        available: u32,
        needed: u32,
    },
    NotFound,
    #[error(ignore)]
    #[from(ignore)]
    MethodNotFound(Cow<'static, str>),
    NoVolatileRedisDatabase,
    #[error(ignore)]
    #[from(ignore)]
    #[display(fmt = "{} @ {}", _0, _1)]
    OldHead(Arc<Web3Rpc>, Web3ProxyBlock),
    OriginRequired,
    #[error(ignore)]
    #[from(ignore)]
    OriginNotAllowed(headers::Origin),
    #[display(fmt = "{:?}", _0)]
    #[error(ignore)]
    ParseBytesError(Option<ethers::types::ParseBytesError>),
    ParseMsgError(siwe::ParseError),
    ParseAddressError,
    #[display(fmt = "{:?} > {:?}", from, to)]
    RangeInvalid {
        from: BlockNumOrHash,
        to: BlockNumOrHash,
    },
    #[display(fmt = "{:?} > {:?}", from, to)]
    #[error(ignore)]
    #[from(ignore)]
    RangeTooLarge {
        from: BlockNumOrHash,
        to: BlockNumOrHash,
        requested: U64,
        allowed: U64,
    },
    #[display(fmt = "{:?}, {:?}", _0, _1)]
    RateLimited(Authorization, Option<Instant>),
    Redis(RedisError),
    RedisDeadpool(RedisPoolError),
    RefererRequired,
    #[display(fmt = "{:?}", _0)]
    #[error(ignore)]
    #[from(ignore)]
    RefererNotAllowed(headers::Referer),
    Reqwest(reqwest::Error),
    SemaphoreAcquireError(AcquireError),
    SerdeJson(serde_json::Error),
    SiweVerification(VerificationError),
    /// simple way to return an error message to the user and an anyhow to our logs
    #[display(fmt = "{}, {}, {:?}", _0, _1, _2)]
    StatusCode(StatusCode, Cow<'static, str>, Option<serde_json::Value>),
    #[display(fmt = "streaming response")]
    #[error(ignore)]
    StreamResponse(StreamResponse<Arc<RawValue>>),
    #[cfg(feature = "stripe")]
    StripeWebhookError(stripe::WebhookError),
    /// TODO: what should be attached to the timout?
    #[display(fmt = "{:?}", _0)]
    #[error(ignore)]
    Timeout(Option<Duration>),
    UlidDecode(ulid::DecodeError),
    #[error(ignore)]
    UnknownBlockHash(H256),
    #[display(fmt = "known: {known}, unknown: {unknown}")]
    #[error(ignore)]
    UnknownBlockNumber {
        known: U64,
        unknown: U64,
    },
    UnknownKey,
    #[error(ignore)]
    UnhandledMethod(Cow<'static, str>),
    UserAgentRequired,
    #[error(ignore)]
    UserAgentNotAllowed(headers::UserAgent),
    UserIdZero,
    PaymentRequired,
    WatchRecvError(tokio::sync::watch::error::RecvError),
    WatchSendError,
    WebsocketOnly,
    #[display(fmt = "{:?}, {}", _0, _1)]
    #[error(ignore)]
    WithContext(Option<Box<Web3ProxyError>>, Cow<'static, str>),
}

impl Web3ProxyError {
    pub fn as_json_response_parts(
        &self,
        id: Box<RawValue>,
    ) -> (StatusCode, jsonrpc::SingleResponse) {
        let (code, response_data) = self.as_response_parts();
        let response = jsonrpc::ParsedResponse::from_response_data(response_data, id);
        (code, response.into())
    }

    /// turn the error into an axum response.
    /// <https://www.jsonrpc.org/specification#error_object>
    /// TODO? change to `to_response_parts(self)`
    pub fn as_response_parts(&self) -> (StatusCode, ForwardedResponse<Arc<RawValue>>) {
        // TODO: include a unique request id in the data
        let (code, err): (StatusCode, JsonRpcErrorData) = match self {
            Self::Abi(err) => {
                warn!(?err, "abi error");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "abi error".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::AccessDenied(msg) => {
                // TODO: attach something to this trace. probably don't include much in the message though. don't want to leak creds by accident
                trace!(%msg, "access denied");
                (
                    StatusCode::FORBIDDEN,
                    JsonRpcErrorData {
                        message: format!("FORBIDDEN: {}", msg).into(),
                        code: StatusCode::FORBIDDEN.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::ArchiveRequired { min, max } => {
                // TODO: attach something to this trace. probably don't include much in the message though. don't want to leak creds by accident
                trace!(?min, ?max, "archive node required");
                (
                    StatusCode::OK,
                    JsonRpcErrorData {
                        message: "Archive data required".into(),
                        code: StatusCode::OK.as_u16().into(),
                        data: Some(json!({
                            "min": min,
                            "max": max,
                        })),
                    },
                )
            }
            Self::Anyhow(err) => {
                error!(?err, "anyhow: {}", err);
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        // TODO: is it safe to expose all of our anyhow strings?
                        message: "INTERNAL SERVER ERROR".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::Arc(err) => {
                return err.as_response_parts();
            }
            Self::BadRequest(err) => {
                trace!(?err, "BAD_REQUEST");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "bad request".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::BadResponse(err) => {
                // TODO: think about this one more. ankr gives us this because ethers fails to parse responses without an id
                debug!(?err, "BAD_RESPONSE: {}", err);
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "bad response".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::BadRouting => {
                error!("BadRouting");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "bad routing".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::Contract(err) => {
                warn!(?err, "Contract Error: {}", err);
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "contract error".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::Database(err) => {
                error!(?err, "database err: {}", err);
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "database error!".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::DatabaseArc(err) => {
                error!(?err, "database (arc) err: {}", err);
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "database (arc) error!".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::Decimal(err) => {
                debug!(?err, "Decimal Error: {}", err);
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "decimal error".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::EthersHttpClient(err) => match JsonRpcErrorData::try_from(err) {
                Ok(err) => {
                    trace!(?err, "EthersHttpClient jsonrpc error");
                    (StatusCode::OK, err)
                }
                Err(err) => {
                    warn!(?err, "EthersHttpClient");
                    (
                        StatusCode::INTERNAL_SERVER_ERROR,
                        JsonRpcErrorData {
                            message: "ethers http client error".into(),
                            code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                            data: Some(serde_json::Value::String(err.to_string())),
                        },
                    )
                }
            },
            Self::EthersProvider(err) => match JsonRpcErrorData::try_from(err) {
                Ok(err) => {
                    trace!(?err, "EthersProvider jsonrpc error");
                    (StatusCode::OK, err)
                }
                Err(err) => {
                    warn!(?err, "EthersProvider");
                    (
                        StatusCode::INTERNAL_SERVER_ERROR,
                        JsonRpcErrorData {
                            message: "ethers provider error".into(),
                            code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                            data: Some(serde_json::Value::String(err.to_string())),
                        },
                    )
                }
            },
            Self::EthersWsClient(err) => match JsonRpcErrorData::try_from(err) {
                Ok(err) => {
                    trace!(?err, "EthersWsClient jsonrpc error");
                    (StatusCode::OK, err)
                }
                Err(err) => {
                    warn!(?err, "EthersWsClient");
                    (
                        StatusCode::INTERNAL_SERVER_ERROR,
                        JsonRpcErrorData {
                            message: "ethers ws client error".into(),
                            code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                            data: Some(serde_json::Value::String(err.to_string())),
                        },
                    )
                }
            },
            Self::FarFutureBlock { head, requested } => {
                trace!(?head, ?requested, "FarFutureBlock");
                (
                    StatusCode::OK,
                    JsonRpcErrorData {
                        message: "requested block is too far in the future".into(),
                        code: (-32002).into(),
                        data: Some(json!({
                            "head": head,
                            "requested": requested,
                        })),
                    },
                )
            }
            // Self::JsonRpcForwardedError(x) => (StatusCode::OK, x),
            Self::GasEstimateNotU256 => {
                trace!("GasEstimateNotU256");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "gas estimate result is not an U256".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::HdrRecord(err) => {
                warn!(?err, "HdrRecord");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "hdr record error".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::Headers(err) => {
                trace!(?err, "HeadersError");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "headers error".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::HeaderToString(err) => {
                trace!(?err, "HeaderToString");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "header to string error".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::HttpUri(err) => {
                trace!(?err, "HttpUri");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: err.to_string().into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::Hyper(err) => {
                warn!(?err, "hyper");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        // TODO: is it safe to expose these error strings?
                        message: err.to_string().into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::InfluxDb2Request(err) => {
                // TODO: attach a request id to the message and to this error so that if people report problems, we can dig in sentry to find out more
                error!(?err, "influxdb2");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "influxdb2 error!".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::InvalidBlockBounds { min, max } => {
                trace!(%min, %max, "InvalidBlockBounds");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "Invalid blocks bounds requested".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: Some(json!({
                            "min": min,
                            "max": max,
                        })),
                    },
                )
            }
            Self::IpAddrParse(err) => {
                debug!(?err, "IpAddrParse");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: err.to_string().into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::IpNotAllowed(ip) => {
                trace!(?ip, "IpNotAllowed");
                (
                    StatusCode::FORBIDDEN,
                    JsonRpcErrorData {
                        message: "IP is not allowed!".into(),
                        code: StatusCode::FORBIDDEN.as_u16().into(),
                        data: Some(serde_json::Value::String(ip.to_string())),
                    },
                )
            }
            Self::InvalidHeaderValue(err) => {
                trace!(?err, "InvalidHeaderValue");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "invalid header value".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::InvalidEip => {
                trace!("InvalidEip");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "invalid message eip given".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::InvalidInviteCode => {
                trace!("InvalidInviteCode");
                (
                    StatusCode::UNAUTHORIZED,
                    JsonRpcErrorData {
                        message: "invalid invite code".into(),
                        code: StatusCode::UNAUTHORIZED.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::Io(err) => {
                warn!(?err, "std io");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "std io".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        // TODO: is it safe to expose our io error strings?
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::InvalidReferer => {
                trace!("InvalidReferer");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "invalid referer!".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::InvalidSignatureLength => {
                trace!("InvalidSignatureLength");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "invalid signature length".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::InvalidUserAgent => {
                trace!("InvalidUserAgent");
                (
                    StatusCode::FORBIDDEN,
                    JsonRpcErrorData {
                        message: "invalid user agent!".into(),
                        code: StatusCode::FORBIDDEN.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::InvalidUserKey => {
                trace!("InvalidUserKey");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "UserKey was not a ULID or UUID".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::InvalidUserTier => {
                warn!("InvalidUserTier");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "UserTier is not valid!".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::JoinError(err) => {
                let code = if err.is_cancelled() {
                    trace!(?err, "JoinError. likely shutting down");
                    StatusCode::BAD_GATEWAY
                } else {
                    warn!(?err, "JoinError");
                    StatusCode::INTERNAL_SERVER_ERROR
                };

                (
                    code,
                    JsonRpcErrorData {
                        // TODO: different messages of cancelled or not?
                        message: "Unable to complete request".into(),
                        code: code.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::JsonRejection(err) => {
                trace!(?err, "JsonRejection");

                let (message, code): (&str, _) = match &err {
                    JsonRejection::JsonDataError(_) => ("Invalid Request", -32600),
                    JsonRejection::JsonSyntaxError(_) => ("Parse error", -32700),
                    JsonRejection::MissingJsonContentType(_) => ("Invalid Request", -32600),
                    JsonRejection::BytesRejection(_) => ("Invalid Request", -32600),
                    x => {
                        warn!(?x, "what? isn't that all of them?");
                        // TODO: what code should this be?
                        ("Parse error", -32700)
                    }
                };

                // TODO: i feel like this should be a 401, but the spec seems to say its a 200
                (
                    StatusCode::OK,
                    JsonRpcErrorData {
                        message: message.into(),
                        code: code.into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::JsonRpcErrorData(jsonrpc_error_data) => {
                // TODO: do this without clone? the Arc needed it though
                (StatusCode::OK, jsonrpc_error_data.clone())
            }
            Self::MdbxPanic(rpc, msg) => {
                error!(%msg, "mdbx panic");

                // TODO: this is bad enough that we should send something to pager duty

                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "mdbx panic".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: Some(json!({"rpc": rpc})),
                    },
                )
            }
            Self::MethodNotFound(method) => {
                warn!("MethodNotFound: {}", method);
                (
                    StatusCode::OK,
                    JsonRpcErrorData {
                        message: "Method not found".into(),
                        code: -32601,
                        data: Some(json!({
                            "method": method,
                            "extra": "contact us if you need this",
                        })),
                    },
                )
            }
            Self::NoBlockNumberOrHash => {
                warn!("NoBlockNumberOrHash");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "Blocks here must have a number or hash".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::NoBlocksKnown => {
                error!("NoBlocksKnown");
                (
                    StatusCode::BAD_GATEWAY,
                    JsonRpcErrorData {
                        message: "no blocks known".into(),
                        code: StatusCode::BAD_GATEWAY.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::NoConsensusHeadBlock => {
                error!("NoConsensusHeadBlock");
                (
                    StatusCode::BAD_GATEWAY,
                    JsonRpcErrorData {
                        message: "no consensus head block".into(),
                        code: StatusCode::BAD_GATEWAY.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::NoDatabaseConfigured => {
                // TODO: this needs more context
                debug!("no database configured");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "no database configured! this request needs a database".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::NoHandleReady => {
                error!("NoHandleReady");
                (
                    StatusCode::BAD_GATEWAY,
                    JsonRpcErrorData {
                        message: "unable to retry for request handle".into(),
                        code: StatusCode::BAD_GATEWAY.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::NoVolatileRedisDatabase => {
                error!("no volatile redis database configured");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "no volatile redis database configured!".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::NoServersSynced => {
                warn!("NoServersSynced");
                (
                    StatusCode::BAD_GATEWAY,
                    JsonRpcErrorData {
                        message: "no servers synced".into(),
                        code: StatusCode::BAD_GATEWAY.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::NotEnoughRpcs {
                num_known,
                min_head_rpcs,
            } => {
                error!(%num_known, %min_head_rpcs, "NotEnoughRpcs");
                (
                    StatusCode::BAD_GATEWAY,
                    JsonRpcErrorData {
                        message: format!(
                            "not enough rpcs connected {}/{}",
                            num_known, min_head_rpcs
                        )
                        .into(),
                        code: StatusCode::BAD_GATEWAY.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::NotEnoughSoftLimit { available, needed } => {
                error!(available, needed, "NotEnoughSoftLimit");
                (
                    StatusCode::BAD_GATEWAY,
                    JsonRpcErrorData {
                        message: "not enough soft limit available".into(),
                        code: StatusCode::BAD_GATEWAY.as_u16().into(),
                        data: Some(json!({
                            "available": available,
                            "needed": needed,
                        })),
                    },
                )
            }
            Self::NotFound => {
                // TODO: emit a stat?
                // TODO: instead of an error, show a normal html page for 404?
                (
                    StatusCode::NOT_FOUND,
                    JsonRpcErrorData {
                        message: "not found!".into(),
                        code: StatusCode::NOT_FOUND.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::OldHead(rpc, old_head) => {
                warn!(?old_head, "{} is lagged", rpc);
                (
                    StatusCode::BAD_GATEWAY,
                    JsonRpcErrorData {
                        message: "RPC is lagged".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: Some(json!({
                            "rpc": rpc.name,
                            "head": old_head,
                        })),
                    },
                )
            }
            Self::OriginRequired => {
                trace!("OriginRequired");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "Origin required".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::OriginNotAllowed(origin) => {
                trace!(?origin, "OriginNotAllowed");
                (
                    StatusCode::FORBIDDEN,
                    JsonRpcErrorData {
                        message: "Origin is not allowed!".into(),
                        code: StatusCode::FORBIDDEN.as_u16().into(),
                        data: Some(serde_json::Value::String(origin.to_string())),
                    },
                )
            }
            Self::ParseBytesError(err) => {
                trace!(?err, "ParseBytesError");

                let data = err
                    .as_ref()
                    .map(|x| serde_json::Value::String(x.to_string()));

                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "parse bytes error!".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data,
                    },
                )
            }
            Self::ParseMsgError(err) => {
                trace!(?err, "ParseMsgError");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "parse message error!".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::ParseAddressError => {
                trace!("ParseAddressError");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "unable to parse address".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::PaymentRequired => {
                trace!("PaymentRequiredError");
                (
                    StatusCode::PAYMENT_REQUIRED,
                    JsonRpcErrorData {
                        message: "Payment is required to activate premium".into(),
                        code: StatusCode::PAYMENT_REQUIRED.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::RangeInvalid { from, to } => {
                trace!(?from, ?to, "RangeInvalid");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "invalid block range given".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: Some(json!({
                            "from": from,
                            "to": to,
                        })),
                    },
                )
            }
            Self::RangeTooLarge {
                from,
                to,
                requested,
                allowed,
            } => {
                trace!(?from, ?to, %requested, %allowed, "RangeTooLarge");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "invalid block range given".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: Some(json!({
                            "from": from,
                            "to": to,
                            "requested": requested,
                            "allowed": allowed,
                        })),
                    },
                )
            }
            // TODO: this should actually by the id of the key. multiple users might control one key
            Self::RateLimited(authorization, retry_at) => {
                // TODO: emit a stat

                let retry_after = if let Some(retry_at) = retry_at {
                    retry_at.duration_since(Instant::now()).as_secs()
                } else {
                    // TODO: what should we default to?
                    60
                };

                // create a string with either the IP or the rpc_key_id
                let retry_data = if authorization.checks.rpc_secret_key_id.is_none() {
                    json!({"retry_after": retry_after, "ip": authorization.ip})
                } else {
                    json!({"retry_after": retry_after, "ip": authorization.ip, "key_id": authorization.checks.rpc_secret_key_id.unwrap()})
                };

                (
                    StatusCode::TOO_MANY_REQUESTS,
                    JsonRpcErrorData {
                        message: "too many requests".into(),
                        code: StatusCode::TOO_MANY_REQUESTS.as_u16().into(),
                        data: Some(retry_data),
                    },
                )
            }
            Self::Redis(err) => {
                warn!(?err, "redis");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "redis error!".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::RedisDeadpool(err) => {
                error!(?err, "redis deadpool");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        // TODO: is it safe to expose our io error strings?
                        message: "redis pool error".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::RefererRequired => {
                trace!("referer required");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "Referer required".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::RefererNotAllowed(referer) => {
                trace!(?referer, "referer not allowed");
                (
                    StatusCode::FORBIDDEN,
                    JsonRpcErrorData {
                        message: "Referer is not allowed".into(),
                        code: StatusCode::FORBIDDEN.as_u16().into(),
                        data: Some(serde_json::Value::String(format!("{:?}", referer))),
                    },
                )
            }
            Self::Reqwest(err) => {
                warn!(?err, "reqwest");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "reqwest error!".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::SemaphoreAcquireError(err) => {
                error!(?err, "semaphore acquire");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        // TODO: is it safe to expose all of our anyhow strings?
                        message: "semaphore acquire error".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::SerdeJson(err) => {
                trace!(?err, "serde json");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "de/serialization error!".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::SiweVerification(err) => {
                trace!(?err, "Siwe Verification");
                (
                    StatusCode::UNAUTHORIZED,
                    JsonRpcErrorData {
                        message: "siwe verification error".into(),
                        code: StatusCode::UNAUTHORIZED.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::StatusCode(status_code, err_msg, data) => {
                // different status codes should get different error levels. 500s should warn. 400s should stat
                let code = status_code.as_u16();
                if (500..600).contains(&code) {
                    warn!(?data, "server error {}: {}", code, err_msg);
                } else {
                    trace!(?data, "user error {}: {}", code, err_msg);
                }

                // TODO: would be great to do this without the cloning! Something blocked that and I didn't write a comment about it though
                (
                    *status_code,
                    JsonRpcErrorData {
                        message: err_msg.clone(),
                        code: code.into(),
                        data: data.clone(),
                    },
                )
            }
            Self::StreamResponse(..) => {
                // TODO: should it really?
                unimplemented!("streaming should be handled elsewhere");
            }
            #[cfg(feature = "stripe")]
            Self::StripeWebhookError(err) => {
                trace!(?err, "StripeWebhookError");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "stripe webhook error".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        // TODO: include the stripe signature? anything else?
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::Timeout(x) => {
                let data = x.as_ref().map(|x| json!(x.as_secs_f32()));

                (
                    StatusCode::REQUEST_TIMEOUT,
                    JsonRpcErrorData {
                        message: "request timed out".into(),
                        code: StatusCode::REQUEST_TIMEOUT.as_u16().into(),
                        // TODO: prettier message
                        // TODO: include the actual id!
                        data,
                    },
                )
            }
            Self::UlidDecode(err) => {
                trace!(?err, "UlidDecodeError");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "ulid decode error".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::UnhandledMethod(method) => {
                unimplemented!(
                    "unhandled method ({}) should never be shown to a user",
                    method
                );
            }
            Self::UnknownBlockHash(hash) => {
                debug!(%hash, "UnknownBlockHash");
                (
                    StatusCode::OK,
                    JsonRpcErrorData {
                        message: "block hash not found".into(),
                        code: -32000,
                        data: Some(json!({
                            "hash": hash,
                        })),
                    },
                )
            }
            Self::UnknownBlockNumber { known, unknown } => {
                debug!(%known, %unknown, "UnknownBlockNumber");
                (
                    StatusCode::OK,
                    JsonRpcErrorData {
                        message: "block number not found".into(),
                        code: -32000,
                        data: Some(json!({
                            "unknown": unknown,
                            "known": known,
                        })),
                    },
                )
            }
            Self::UnknownKey => (
                StatusCode::UNAUTHORIZED,
                JsonRpcErrorData {
                    message: "unknown api key!".into(),
                    code: StatusCode::UNAUTHORIZED.as_u16().into(),
                    data: None,
                },
            ),
            Self::UnknownReferralCode => {
                trace!("UnknownReferralCode");
                (
                    StatusCode::UNAUTHORIZED,
                    JsonRpcErrorData {
                        message: "invalid referral code".into(),
                        code: StatusCode::UNAUTHORIZED.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::UserAgentRequired => {
                trace!("UserAgentRequired");
                (
                    StatusCode::UNAUTHORIZED,
                    JsonRpcErrorData {
                        message: "User agent required".into(),
                        code: StatusCode::UNAUTHORIZED.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::UserAgentNotAllowed(ua) => {
                trace!(%ua, "UserAgentNotAllowed");
                (
                    StatusCode::FORBIDDEN,
                    JsonRpcErrorData {
                        message: "User agent is not allowed!".into(),
                        code: StatusCode::FORBIDDEN.as_u16().into(),
                        data: Some(serde_json::Value::String(ua.to_string())),
                    },
                )
            }
            Self::UserIdZero => {
                warn!("UserIdZero");
                // TODO: this might actually be an application error and not a BAD_REQUEST
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "user ids should always be non-zero".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::WatchRecvError(err) => {
                error!(?err, "WatchRecvError");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "watch recv error!".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: Some(serde_json::Value::String(err.to_string())),
                    },
                )
            }
            Self::WatchSendError => {
                error!("WatchSendError");
                (
                    StatusCode::INTERNAL_SERVER_ERROR,
                    JsonRpcErrorData {
                        message: "watch send error!".into(),
                        code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::WebsocketOnly => {
                trace!("WebsocketOnly. redirect_public_url not set");
                (
                    StatusCode::BAD_REQUEST,
                    JsonRpcErrorData {
                        message: "only websockets work here".into(),
                        code: StatusCode::BAD_REQUEST.as_u16().into(),
                        data: None,
                    },
                )
            }
            Self::WithContext(err, msg) => match err {
                Some(err) => {
                    warn!(?err, %msg, "error w/ context");
                    return err.as_response_parts();
                }
                None => {
                    warn!(%msg, "error w/ context");
                    (
                        StatusCode::INTERNAL_SERVER_ERROR,
                        JsonRpcErrorData {
                            message: msg.clone(),
                            code: StatusCode::INTERNAL_SERVER_ERROR.as_u16().into(),
                            data: None,
                        },
                    )
                }
            },
        };

        (code, ForwardedResponse::from(err))
    }

    #[inline]
    pub fn into_response_with_id(self, id: Option<Box<RawValue>>) -> Response {
        let (status_code, response_data) = self.as_response_parts();

        let id = id.unwrap_or_default();

        let response = ParsedResponse::from_response_data(response_data, id);

        (status_code, Json(response)).into_response()
    }

    /// some things should keep going even if the db is down
    pub fn split_db_errors(&self) -> Result<&Self, &Self> {
        match self {
            Web3ProxyError::NoDatabaseConfigured => Ok(self),
            Web3ProxyError::Database(err) => {
                warn!(?err, "db error while checking rpc key authorization");
                Ok(self)
            }
            Web3ProxyError::DatabaseArc(err) => {
                warn!(?err, "db arc error while checking rpc key authorization");
                Ok(self)
            }
            Web3ProxyError::Arc(x) => {
                // errors from inside moka cache helpers are wrapped in an Arc
                x.split_db_errors()
            }
            _ => Err(self),
        }
    }
}

impl From<ethers::types::ParseBytesError> for Web3ProxyError {
    fn from(err: ethers::types::ParseBytesError) -> Self {
        Self::ParseBytesError(Some(err))
    }
}

impl From<tokio::time::error::Elapsed> for Web3ProxyError {
    fn from(_: tokio::time::error::Elapsed) -> Self {
        Self::Timeout(None)
    }
}

impl IntoResponse for Web3ProxyError {
    #[inline]
    fn into_response(self) -> Response {
        self.into_response_with_id(Default::default())
    }
}

pub trait Web3ProxyErrorContext<T> {
    fn web3_context<S: Into<Cow<'static, str>>>(self, msg: S) -> Result<T, Web3ProxyError>;
}

impl<T> Web3ProxyErrorContext<T> for Option<T> {
    fn web3_context<S: Into<Cow<'static, str>>>(self, msg: S) -> Result<T, Web3ProxyError> {
        self.ok_or(Web3ProxyError::WithContext(None, msg.into()))
    }
}

impl<T, E> Web3ProxyErrorContext<T> for Result<T, E>
where
    E: Into<Web3ProxyError>,
{
    fn web3_context<S: Into<Cow<'static, str>>>(self, msg: S) -> Result<T, Web3ProxyError> {
        self.map_err(|err| Web3ProxyError::WithContext(Some(Box::new(err.into())), msg.into()))
    }
}

impl Web3ProxyError {
    pub fn into_message(self, id: Option<Box<RawValue>>) -> Message {
        let (_, err) = self.as_response_parts();

        let id = id.unwrap_or_default();

        let err = ParsedResponse::from_response_data(err, id);

        let msg = serde_json::to_string(&err).expect("errors should always serialize to json");

        // TODO: what about a binary message?
        Message::Text(msg)
    }
}