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use schemars::JsonSchema;
use serde::{Deserialize, Serialize};
use crate::Binary;
/// SystemError is used for errors inside the VM and is API friendly (i.e. serializable).
///
/// This is used on return values for Querier as a nested result: Result<StdResult<T>, SystemError>
/// The first wrap (SystemError) will trigger if the contract address doesn't exist,
/// the QueryRequest is malformated, etc. The second wrap will be an error message from
/// the contract itself.
///
/// Such errors are only created by the VM. The error type is defined in the standard library, to ensure
/// the contract understands the error format without creating a dependency on cosmwasm-vm.
#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
#[serde(rename_all = "snake_case")]
#[non_exhaustive]
pub enum SystemError {
InvalidRequest {
error: String,
request: Binary,
},
InvalidResponse {
error: String,
response: Binary,
},
NoSuchContract {
/// The address that was attempted to query
addr: String,
},
Unknown {},
UnsupportedRequest {
kind: String,
},
}
impl std::error::Error for SystemError {}
impl std::fmt::Display for SystemError {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
SystemError::InvalidRequest { error, request } => write!(
f,
"Cannot parse request: {} in: {}",
error,
String::from_utf8_lossy(request)
),
SystemError::InvalidResponse { error, response } => write!(
f,
"Cannot parse response: {} in: {}",
error,
String::from_utf8_lossy(response)
),
SystemError::NoSuchContract { addr } => write!(f, "No such contract: {}", addr),
SystemError::Unknown {} => write!(f, "Unknown system error"),
SystemError::UnsupportedRequest { kind } => {
write!(f, "Unsupported query type: {}", kind)
}
}
}
}