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/*
*
* Hedera Rust SDK
*
* Copyright (C) 2022 - 2023 Hedera Hashgraph, LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
use std::error::Error as StdError;
use std::result::Result as StdResult;
use crate::entity_id::Checksum;
use crate::{
AccountId,
Hbar,
Status,
TransactionId,
};
/// `Result<T, Error>`
pub type Result<T> = StdResult<T, Error>;
pub(crate) type BoxStdError = Box<dyn StdError + Send + Sync + 'static>;
/// Represents any possible error from a fallible function in the Hedera SDK.
#[derive(Debug, thiserror::Error)]
#[non_exhaustive]
pub enum Error {
/// Request timed out.
#[error("failed to complete request within the maximum time allowed; most recent attempt failed with: {0}")]
TimedOut(#[source] Box<Error>),
/// GRPC status code was an error.
#[error("grpc: {0}")]
GrpcStatus(#[from] tonic::Status),
/// Failed to parse an SDK type from a protobuf response.
#[error("failed to create a SDK type from a protobuf response: {0}")]
FromProtobuf(#[source] BoxStdError),
// todo: bikeshed this.
/// Freeze failed due to there being no explicitly set node account IDs and no client being provided to generate them.
#[error("freeze failed due to node account IDs being unset")]
FreezeUnsetNodeAccountIds,
/// A transaction failed pre-check.
///
/// The transaction had the ID `transaction_id`.
///
/// Caused by `status` being an error.
#[error("transaction `{transaction_id}` failed pre-check with status `{status:?}`")]
TransactionPreCheckStatus {
/// The status that caused the [`Transaction`](crate::Transaction) to fail pre-check.
status: Status,
/// The `TransactionId` of the failed [`Transaction`](crate::Transaction) .
transaction_id: TransactionId,
},
/// A transaction failed pre-check.
///
/// The transaction had no `transaction_id`.
///
/// Caused by `status` being an error.
#[error("transaction without transaction id failed pre-check with status `{status:?}`")]
TransactionNoIdPreCheckStatus {
/// The `Status` that caused the [`Transaction`](crate::Transaction) to fail pre-check.
status: Status,
},
/// A [`Query`](crate::Query) for `transaction_id` failed pre-check.
///
/// Caused by `status` being an error.
#[error("query for transaction `{transaction_id}` failed pre-check with status `{status:?}`")]
QueryPreCheckStatus {
/// The `Status` that caused the [`Query`](crate::Query) to fail pre-check.
status: Status,
/// The associated transaction's ID.
transaction_id: TransactionId,
},
/// A [`Query`](crate::Query) failed pre-check.
///
/// The query had an associated `PaymentTransaction` with ID `transaction_id`.
///
/// Caused by `status` being an error.
#[error(
"query with payment transaction `{transaction_id}` failed pre-check with status `{status:?}`"
)]
QueryPaymentPreCheckStatus {
/// The `Status` that caused the [`Query`](crate::Query) to fail pre-check.
status: Status,
/// The associated `PaymentTransaction`'s `TransactionId`.
transaction_id: TransactionId,
},
/// A [`Query`](crate::Query) failed pre-check.
///
/// The query had no `PaymentTransaction`.
///
/// Caused by `status` being an error.
#[error("query with no payment transaction failed pre-check with status `{status:?}`")]
QueryNoPaymentPreCheckStatus {
/// The `Status` that caused the [`Query`](crate::Query) to fail pre-check.
status: Status,
},
/// Failed to parse a basic type from string
/// (ex. [`AccountId`](crate::AccountId), [`ContractId`](crate::ContractId), [`TransactionId`](crate::TransactionId), etc.).
#[error("failed to parse: {0}")]
BasicParse(#[source] BoxStdError),
/// An entity ID had an invalid checksum
#[error("entity ID {shard}.{realm}.{num}-{present_checksum} was incorrect.")]
BadEntityId {
/// The shard number
shard: u64,
/// The realm number
realm: u64,
/// The entity number
num: u64,
/// The (invalid) checksum that was present on the entity ID
present_checksum: Checksum,
/// The checksum that SHOULD HAVE BEEN on the entity ID
expected_checksum: Checksum,
},
/// An entity ID cannot be converted to a string with a checksum, because it takes an alternate form,
/// such as an `alias` or `evm_address`
#[error("to_string_with_checksum() can't be applied to entity ID with alias or evm_address")]
CannotToStringWithChecksum,
/// A task can't be performed because the Client doesn't have a ledger ID set.
#[error("can't {task} without knowing which ledger the entity ID is for; ensure client's ledger ID is set")]
CannotPerformTaskWithoutLedgerId {
/// The task that can't be performed
task: &'static str,
},
/// A task cannot be performed because no `evm_address` field is present.
#[error("can't {task} because evm_address is not present")]
NoEvmAddressPresent {
/// The task that can't be performed
task: &'static str,
},
/// A task cannot be performed because a key is of the wrong type.
#[error("can't {task} because key {key_enum} cannot be of type {key_variant}")]
WrongKeyType {
/// The task that can't be performed
task: &'static str,
/// The name of the key enum (EG `PublicKey` or `PrivateKey`)
key_enum: &'static str,
/// The type of the key enum
key_variant: &'static str,
},
/// Failed to parse a [`PublicKey`](crate::PublicKey) or [`PrivateKey`](crate::PrivateKey).
#[error("failed to parse a key: {0}")]
KeyParse(#[source] BoxStdError),
/// Failed to derive a [`PrivateKey`](crate::PrivateKey) from another `PrivateKey`.
///
/// Examples of when this can happen (non-exhaustive):
/// - [`PrivateKey::derive`](fn@crate::PrivateKey::derive) when the `PrivateKey` doesn't have a chain code.
/// - [`PrivateKey::derive`](fn@crate::PrivateKey::derive)
/// or [`PrivateKey::legacy_derive`](fn@crate::PrivateKey::legacy_derive) on an `Ecsda` key.
#[error("Failed to derive a key: {0}")]
KeyDerive(#[source] BoxStdError),
/// Failed to parse a [`Mnemonic`](crate::Mnemonic) due to the given `reason`.
///
/// the `Mnemonic` is provided because invalid `Mnemonics`
/// can technically still provide valid [`PrivateKeys`](crate::PrivateKey).
#[error("failed to parse a mnemonic: {reason}")]
MnemonicParse {
/// This error's source.
#[source]
reason: MnemonicParseError,
/// The `Mnemonic` in question.
mnemonic: crate::Mnemonic,
},
/// An error occurred while attempting to convert a [`Mnemonic`](crate::Mnemonic) to a [`PrivateKey`](crate::PrivateKey)
#[error("failed to convert a mnemonic to entropy: {0}")]
MnemonicEntropy(#[from] MnemonicEntropyError),
/// The [`Client`](crate::Client) had no payer account (operator)
/// and the attempted request had no explicit [`TransactionId`].
#[error("client must be configured with a payer account or requests must be given an explicit transaction id")]
NoPayerAccountOrTransactionId,
/// Cost of a [`Query`](crate::Query) is more expensive than `max_query_payment`.
///
/// The actual cost of the `Query` is `query_cost`.
#[error("cost of {query_cost} without explicit payment is greater than the maximum allowed payment of {max_query_payment}")]
MaxQueryPaymentExceeded {
/// the configured maximum query payment.
max_query_payment: Hbar,
/// How much the query actually cost.
query_cost: Hbar,
},
/// The associated node account was not found in the network.
#[error("node account `{0}` was not found in the configured network")]
NodeAccountUnknown(AccountId),
/// Received an unrecognized status code from the Hedera Network.
///
/// This can happen when the SDK is outdated, try updating your SDK.
#[error("received unrecognized status code: {0}, try updating your SDK")]
ResponseStatusUnrecognized(i32),
// fixme(sr): Citation needed (unsure if this is accurate).
/// Getting the receipt for `transaction_id` failed with `status`.
#[error("receipt for transaction `{transaction_id:?}` failed with status `{status:?}`")]
ReceiptStatus {
/// The Error's status code.
status: Status,
/// The [`Transaction`](crate::Transaction)'s ID.
transaction_id: Option<TransactionId>,
},
/// Failed to sign a message.
#[error("failed to sign message: {0}")]
Signature(#[source] BoxStdError),
/// Failed to verify a signature.
#[error("failed to verify a signature: {0}")]
SignatureVerify(#[source] BoxStdError),
/// Failed to parse a request from JSON.
#[cfg(feature = "ffi")]
#[error("failed to parse a request from JSON: {0}")]
RequestParse(#[source] BoxStdError),
}
impl Error {
pub(crate) fn from_protobuf<E: Into<BoxStdError>>(error: E) -> Self {
Self::FromProtobuf(error.into())
}
pub(crate) fn key_parse<E: Into<BoxStdError>>(error: E) -> Self {
Self::KeyParse(error.into())
}
pub(crate) fn key_derive<E: Into<BoxStdError>>(error: E) -> Self {
Self::KeyDerive(error.into())
}
pub(crate) fn basic_parse<E: Into<BoxStdError>>(error: E) -> Self {
Self::BasicParse(error.into())
}
#[cfg(feature = "ffi")]
pub(crate) fn request_parse<E: Into<BoxStdError>>(error: E) -> Self {
Self::RequestParse(error.into())
}
pub(crate) fn _signature<E: Into<BoxStdError>>(error: E) -> Self {
Self::Signature(error.into())
}
pub(crate) fn signature_verify(error: impl Into<BoxStdError>) -> Self {
Self::SignatureVerify(error.into())
}
}
/// Failed to parse a mnemonic.
#[derive(Debug, thiserror::Error)]
#[non_exhaustive]
pub enum MnemonicParseError {
/// The [`Mnemonic`](crate::Mnemonic) contains an unexpected length.
#[error("bad length: expected `12` or `24` words, found `{0}`")]
BadLength(usize),
/// The [`Mnemonic`](crate::Mnemonic) contains words that aren't in the wordlist.
#[error("unknown words at indecies: `{0:?}`")]
UnknownWords(Vec<usize>),
/// The [`Mnemonic`](crate::Mnemonic) has an invalid checksum.
#[error("checksum mismatch: expected `{expected:02x}`, found `{actual:02x}`")]
ChecksumMismatch {
/// The checksum that was expected.
expected: u8,
/// The checksum that was actually found.
actual: u8,
},
}
/// Failed to convert a [`Mnemonic`](crate::Mnemonic) to a [`PrivateKey`](crate::PrivateKey)
// todo: find a better name before release.
#[derive(Debug, thiserror::Error)]
#[non_exhaustive]
pub enum MnemonicEntropyError {
/// Encountered a [`Mnemonic`](crate::Mnemonic) of unexpected length.
#[error("bad length: expected `{expected}` words, found {actual} words")]
BadLength {
/// The number of words that were expected (12, 22, or 24)
expected: usize,
/// The number of words that were actually found.
actual: usize,
},
/// The [`Mnemonic`](crate::Mnemonic) has an invalid checksum.
#[error("checksum mismatch: expected `{expected:02x}`, found `{actual:02x}`")]
ChecksumMismatch {
/// The checksum that was expected.
expected: u8,
/// The checksum that was actually found.
actual: u8,
},
/// Used a passphrase with a legacy [`Mnemonic`](crate::Mnemonic).
#[error("used a passphrase with a legacy mnemonic")]
LegacyWithPassphrase,
}