1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
use crate::{decode_error::DecodeError, instruction::InstructionError, msg, pubkey::PubkeyError};
use borsh::maybestd::io::Error as BorshIoError;
use num_traits::{FromPrimitive, ToPrimitive};
use std::convert::TryFrom;
use thiserror::Error;

/// Reasons the program may fail
#[derive(Clone, Debug, Deserialize, Eq, Error, PartialEq, Serialize)]
pub enum ProgramError {
    /// Allows on-chain programs to implement program-specific error types and see them returned
    /// by the Solana runtime. A program-specific error may be any type that is represented as
    /// or serialized to a u32 integer.
    #[error("Custom program error: {0:#x}")]
    Custom(u32),
    #[error("The arguments provided to a program instruction where invalid")]
    InvalidArgument,
    #[error("An instruction's data contents was invalid")]
    InvalidInstructionData,
    #[error("An account's data contents was invalid")]
    InvalidAccountData,
    #[error("An account's data was too small")]
    AccountDataTooSmall,
    #[error("An account's balance was too small to complete the instruction")]
    InsufficientFunds,
    #[error("The account did not have the expected program id")]
    IncorrectProgramId,
    #[error("A signature was required but not found")]
    MissingRequiredSignature,
    #[error("An initialize instruction was sent to an account that has already been initialized")]
    AccountAlreadyInitialized,
    #[error("An attempt to operate on an account that hasn't been initialized")]
    UninitializedAccount,
    #[error("The instruction expected additional account keys")]
    NotEnoughAccountKeys,
    #[error("Failed to borrow a reference to account data, already borrowed")]
    AccountBorrowFailed,
    #[error("Length of the seed is too long for address generation")]
    MaxSeedLengthExceeded,
    #[error("Provided seeds do not result in a valid address")]
    InvalidSeeds,
    #[error("IO Error: {0}")]
    BorshIoError(String),
    #[error("An account does not have enough lamports to be rent-exempt")]
    AccountNotRentExempt,
}

pub trait PrintProgramError {
    fn print<E>(&self)
    where
        E: 'static + std::error::Error + DecodeError<E> + PrintProgramError + FromPrimitive;
}

impl PrintProgramError for ProgramError {
    fn print<E>(&self)
    where
        E: 'static + std::error::Error + DecodeError<E> + PrintProgramError + FromPrimitive,
    {
        match self {
            Self::Custom(error) => {
                if let Some(custom_error) = E::decode_custom_error_to_enum(*error) {
                    custom_error.print::<E>();
                } else {
                    msg!("Error: Unknown");
                }
            }
            Self::InvalidArgument => msg!("Error: InvalidArgument"),
            Self::InvalidInstructionData => msg!("Error: InvalidInstructionData"),
            Self::InvalidAccountData => msg!("Error: InvalidAccountData"),
            Self::AccountDataTooSmall => msg!("Error: AccountDataTooSmall"),
            Self::InsufficientFunds => msg!("Error: InsufficientFunds"),
            Self::IncorrectProgramId => msg!("Error: IncorrectProgramId"),
            Self::MissingRequiredSignature => msg!("Error: MissingRequiredSignature"),
            Self::AccountAlreadyInitialized => msg!("Error: AccountAlreadyInitialized"),
            Self::UninitializedAccount => msg!("Error: UninitializedAccount"),
            Self::NotEnoughAccountKeys => msg!("Error: NotEnoughAccountKeys"),
            Self::AccountBorrowFailed => msg!("Error: AccountBorrowFailed"),
            Self::MaxSeedLengthExceeded => msg!("Error: MaxSeedLengthExceeded"),
            Self::InvalidSeeds => msg!("Error: InvalidSeeds"),
            Self::BorshIoError(_) => msg!("Error: BorshIoError"),
            Self::AccountNotRentExempt => msg!("Error: AccountNotRentExempt"),
        }
    }
}

/// Builtin return values occupy the upper 32 bits
const BUILTIN_BIT_SHIFT: usize = 32;
macro_rules! to_builtin {
    ($error:expr) => {
        ($error as u64) << BUILTIN_BIT_SHIFT
    };
}

pub const CUSTOM_ZERO: u64 = to_builtin!(1);
pub const INVALID_ARGUMENT: u64 = to_builtin!(2);
pub const INVALID_INSTRUCTION_DATA: u64 = to_builtin!(3);
pub const INVALID_ACCOUNT_DATA: u64 = to_builtin!(4);
pub const ACCOUNT_DATA_TOO_SMALL: u64 = to_builtin!(5);
pub const INSUFFICIENT_FUNDS: u64 = to_builtin!(6);
pub const INCORRECT_PROGRAM_ID: u64 = to_builtin!(7);
pub const MISSING_REQUIRED_SIGNATURES: u64 = to_builtin!(8);
pub const ACCOUNT_ALREADY_INITIALIZED: u64 = to_builtin!(9);
pub const UNINITIALIZED_ACCOUNT: u64 = to_builtin!(10);
pub const NOT_ENOUGH_ACCOUNT_KEYS: u64 = to_builtin!(11);
pub const ACCOUNT_BORROW_FAILED: u64 = to_builtin!(12);
pub const MAX_SEED_LENGTH_EXCEEDED: u64 = to_builtin!(13);
pub const INVALID_SEEDS: u64 = to_builtin!(14);
pub const BORSH_IO_ERROR: u64 = to_builtin!(15);
pub const ACCOUNT_NOT_RENT_EXEMPT: u64 = to_builtin!(16);

impl From<ProgramError> for u64 {
    fn from(error: ProgramError) -> Self {
        match error {
            ProgramError::InvalidArgument => INVALID_ARGUMENT,
            ProgramError::InvalidInstructionData => INVALID_INSTRUCTION_DATA,
            ProgramError::InvalidAccountData => INVALID_ACCOUNT_DATA,
            ProgramError::AccountDataTooSmall => ACCOUNT_DATA_TOO_SMALL,
            ProgramError::InsufficientFunds => INSUFFICIENT_FUNDS,
            ProgramError::IncorrectProgramId => INCORRECT_PROGRAM_ID,
            ProgramError::MissingRequiredSignature => MISSING_REQUIRED_SIGNATURES,
            ProgramError::AccountAlreadyInitialized => ACCOUNT_ALREADY_INITIALIZED,
            ProgramError::UninitializedAccount => UNINITIALIZED_ACCOUNT,
            ProgramError::NotEnoughAccountKeys => NOT_ENOUGH_ACCOUNT_KEYS,
            ProgramError::AccountBorrowFailed => ACCOUNT_BORROW_FAILED,
            ProgramError::MaxSeedLengthExceeded => MAX_SEED_LENGTH_EXCEEDED,
            ProgramError::InvalidSeeds => INVALID_SEEDS,
            ProgramError::BorshIoError(_) => BORSH_IO_ERROR,
            ProgramError::AccountNotRentExempt => ACCOUNT_NOT_RENT_EXEMPT,

            ProgramError::Custom(error) => {
                if error == 0 {
                    CUSTOM_ZERO
                } else {
                    error as u64
                }
            }
        }
    }
}

impl From<u64> for ProgramError {
    fn from(error: u64) -> Self {
        match error {
            INVALID_ARGUMENT => ProgramError::InvalidArgument,
            INVALID_INSTRUCTION_DATA => ProgramError::InvalidInstructionData,
            INVALID_ACCOUNT_DATA => ProgramError::InvalidAccountData,
            ACCOUNT_DATA_TOO_SMALL => ProgramError::AccountDataTooSmall,
            INSUFFICIENT_FUNDS => ProgramError::InsufficientFunds,
            INCORRECT_PROGRAM_ID => ProgramError::IncorrectProgramId,
            MISSING_REQUIRED_SIGNATURES => ProgramError::MissingRequiredSignature,
            ACCOUNT_ALREADY_INITIALIZED => ProgramError::AccountAlreadyInitialized,
            UNINITIALIZED_ACCOUNT => ProgramError::UninitializedAccount,
            NOT_ENOUGH_ACCOUNT_KEYS => ProgramError::NotEnoughAccountKeys,
            ACCOUNT_BORROW_FAILED => ProgramError::AccountBorrowFailed,
            MAX_SEED_LENGTH_EXCEEDED => ProgramError::MaxSeedLengthExceeded,
            INVALID_SEEDS => ProgramError::InvalidSeeds,
            CUSTOM_ZERO => ProgramError::Custom(0),
            _ => ProgramError::Custom(error as u32),
        }
    }
}

impl TryFrom<InstructionError> for ProgramError {
    type Error = InstructionError;

    fn try_from(error: InstructionError) -> Result<Self, Self::Error> {
        match error {
            Self::Error::Custom(err) => Ok(Self::Custom(err)),
            Self::Error::InvalidArgument => Ok(Self::InvalidArgument),
            Self::Error::InvalidInstructionData => Ok(Self::InvalidInstructionData),
            Self::Error::InvalidAccountData => Ok(Self::InvalidAccountData),
            Self::Error::AccountDataTooSmall => Ok(Self::AccountDataTooSmall),
            Self::Error::InsufficientFunds => Ok(Self::InsufficientFunds),
            Self::Error::IncorrectProgramId => Ok(Self::IncorrectProgramId),
            Self::Error::MissingRequiredSignature => Ok(Self::MissingRequiredSignature),
            Self::Error::AccountAlreadyInitialized => Ok(Self::AccountAlreadyInitialized),
            Self::Error::UninitializedAccount => Ok(Self::UninitializedAccount),
            Self::Error::NotEnoughAccountKeys => Ok(Self::NotEnoughAccountKeys),
            Self::Error::AccountBorrowFailed => Ok(Self::AccountBorrowFailed),
            Self::Error::MaxSeedLengthExceeded => Ok(Self::MaxSeedLengthExceeded),
            Self::Error::BorshIoError(err) => Ok(Self::BorshIoError(err)),
            Self::Error::AccountNotRentExempt => Ok(Self::AccountNotRentExempt),
            _ => Err(error),
        }
    }
}

impl<T> From<T> for InstructionError
where
    T: ToPrimitive,
{
    fn from(error: T) -> Self {
        let error = error.to_u64().unwrap_or(0xbad_c0de);
        match error {
            CUSTOM_ZERO => InstructionError::Custom(0),
            INVALID_ARGUMENT => InstructionError::InvalidArgument,
            INVALID_INSTRUCTION_DATA => InstructionError::InvalidInstructionData,
            INVALID_ACCOUNT_DATA => InstructionError::InvalidAccountData,
            ACCOUNT_DATA_TOO_SMALL => InstructionError::AccountDataTooSmall,
            INSUFFICIENT_FUNDS => InstructionError::InsufficientFunds,
            INCORRECT_PROGRAM_ID => InstructionError::IncorrectProgramId,
            MISSING_REQUIRED_SIGNATURES => InstructionError::MissingRequiredSignature,
            ACCOUNT_ALREADY_INITIALIZED => InstructionError::AccountAlreadyInitialized,
            UNINITIALIZED_ACCOUNT => InstructionError::UninitializedAccount,
            NOT_ENOUGH_ACCOUNT_KEYS => InstructionError::NotEnoughAccountKeys,
            ACCOUNT_BORROW_FAILED => InstructionError::AccountBorrowFailed,
            MAX_SEED_LENGTH_EXCEEDED => InstructionError::MaxSeedLengthExceeded,
            INVALID_SEEDS => InstructionError::InvalidSeeds,
            _ => {
                // A valid custom error has no bits set in the upper 32
                if error >> BUILTIN_BIT_SHIFT == 0 {
                    InstructionError::Custom(error as u32)
                } else {
                    Self::InvalidError
                }
            }
        }
    }
}

impl From<PubkeyError> for ProgramError {
    fn from(error: PubkeyError) -> Self {
        match error {
            PubkeyError::MaxSeedLengthExceeded => ProgramError::MaxSeedLengthExceeded,
            PubkeyError::InvalidSeeds => ProgramError::InvalidSeeds,
        }
    }
}

impl From<BorshIoError> for ProgramError {
    fn from(error: BorshIoError) -> Self {
        ProgramError::BorshIoError(format!("{}", error))
    }
}