//! Various error variants that can happen when working with transactions.

use crate::GotExpectedBoxed;
use alloy_primitives::U256;

/// Represents error variants that can happen when trying to validate a transaction.
#[derive(Debug, Clone, Eq, PartialEq, thiserror::Error)]
pub enum InvalidTransactionError {
    /// The sender does not have enough funds to cover the transaction fees
    #[error(
        "sender does not have enough funds ({}) to cover transaction fees: {}", _0.got, _0.expected
    )]
    InsufficientFunds(GotExpectedBoxed<U256>),
    /// The nonce is lower than the account's nonce, or there is a nonce gap present.
    ///
    /// This is a consensus error.
    #[error("transaction nonce is not consistent: next nonce {state}, tx nonce {tx}")]
    NonceNotConsistent {
        /// The nonce of the transaction.
        tx: u64,
        /// The current state of the nonce in the local chain.
        state: u64,
    },
    /// The transaction is before Spurious Dragon and has a chain ID.
    #[error("transactions before Spurious Dragon should not have a chain ID")]
    OldLegacyChainId,
    /// The chain ID in the transaction does not match the current network configuration.
    #[error("transaction's chain ID does not match")]
    ChainIdMismatch,
    /// The transaction requires EIP-2930 which is not enabled currently.
    #[error("EIP-2930 transactions are disabled")]
    Eip2930Disabled,
    /// The transaction requires EIP-1559 which is not enabled currently.
    #[error("EIP-1559 transactions are disabled")]
    Eip1559Disabled,
    /// The transaction requires EIP-4844 which is not enabled currently.
    #[error("EIP-4844 transactions are disabled")]
    Eip4844Disabled,
    /// The transaction requires EIP-7702 which is not enabled currently.
    #[error("EIP-7702 transactions are disabled")]
    Eip7702Disabled,
    /// Thrown if a transaction is not supported in the current network configuration.
    #[error("transaction type not supported")]
    TxTypeNotSupported,
    /// The calculated gas of the transaction exceeds `u64::MAX`.
    #[error("gas overflow (maximum of u64)")]
    GasUintOverflow,
    /// The transaction is specified to use less gas than required to start the invocation.
    #[error("intrinsic gas too low")]
    GasTooLow,
    /// The transaction gas exceeds the limit
    #[error("intrinsic gas too high")]
    GasTooHigh,
    /// Thrown to ensure no one is able to specify a transaction with a tip higher than the total
    /// fee cap.
    #[error("max priority fee per gas higher than max fee per gas")]
    TipAboveFeeCap,
    /// Thrown post London if the transaction's fee is less than the base fee of the block.
    #[error("max fee per gas less than block base fee")]
    FeeCapTooLow,
    /// Thrown if the sender of a transaction is a contract.
    #[error("transaction signer has bytecode set")]
    SignerAccountHasBytecode,
    /// Thrown post Osaka if gas limit is too high.
    #[error("gas limit too high")]
    GasLimitTooHigh,
}

impl InvalidTransactionError {
    /// Returns true if this is [`InvalidTransactionError::NonceNotConsistent`] and the
    /// transaction's nonce is lower than the state's.
    pub fn is_nonce_too_low(&self) -> bool {
        match self {
            Self::NonceNotConsistent { tx, state } => tx < state,
            _ => false,
        }
    }
}

/// Represents error variants that can happen when trying to convert a transaction to pooled
/// transaction.
#[derive(Debug, Clone, Eq, PartialEq, derive_more::Display, derive_more::Error)]
pub enum TransactionConversionError {
    /// This error variant is used when a transaction cannot be converted into a pooled transaction
    /// because it is not supported for P2P network.
    #[display("Transaction is not supported for p2p")]
    UnsupportedForP2P,
}

/// Represents error variants than can happen when trying to convert a recovered transaction.
#[derive(Debug, Clone, Eq, PartialEq, thiserror::Error)]
pub enum TryFromRecoveredTransactionError {
    /// Thrown if the transaction type is unsupported.
    #[error("Unsupported transaction type: {_0}")]
    UnsupportedTransactionType(u8),
    /// This error variant is used when a blob sidecar is missing.
    #[error("Blob sidecar missing for an EIP-4844 transaction")]
    BlobSidecarMissing,
}
