Solana Integration

Account Operations

impl<'a> VM<'a> {
    fn validate_account(&self, index: usize) -> ProgramResult {
        let account = self.accounts.get(index)?;
        if !account.is_writable {
            return Err(VMError::AccountNotWritable.into());
        }
        if account.owner != self.program_id {
            return Err(VMError::InvalidAccountOwner.into());
        }
        Ok(())
    }
}

• → Account ownership verification
• → Write permission checks
• → Lamport balance validation
• → Account data size management

Token Instructions

pub enum SPLOperation {
    Transfer,
    MintTo,
    Burn,
    Approve,
    Revoke,
    InitializeAccount,
    CloseAccount,
}

impl SPLOperations {
    fn execute_spl_op(&self, op: SPLOperation) -> ProgramResult {
        match op {
            SPLOperation::Transfer => self.token_transfer()?,
            SPLOperation::MintTo => self.token_mint_to()?,
            // More operations...
        }
        Ok(())
    }
}

• → Token transfers
• → Minting operations
• → Account management
• → Authority validation

CPI Framework

pub struct CPIContext<'a> {
    program_id: &'a Pubkey,
    accounts: &'a [AccountInfo<'a>],
    data: &'a [u8],
}

impl<'a> VM<'a> {
    fn execute_cpi(&self, context: CPIContext) -> ProgramResult {
        solana_program::program::invoke(
            &Instruction::new_with_bytes(
                *context.program_id,
                context.data,
                context.accounts.to_vec(),
            ),
            context.accounts,
        )
    }
}

• → Safe CPI execution
• → Account privilege preservation
• → Recursive CPI support
• → Error propagation

Security Checks

impl SecurityChecker {
    fn check_account_ownership(&self, account_idx: usize) -> ProgramResult {
        let account = &self.accounts[account_idx];
        if account.owner != self.program_id {
            return Err(ProgramError::IllegalOwner);
        }
        Ok(())
    }

    fn check_signer(&self, account_idx: usize) -> ProgramResult {
        let account = &self.accounts[account_idx];
        if !account.is_signer {
            return Err(ProgramError::MissingRequiredSignature);
        }
        Ok(())
    }
}

• → Account ownership verification
• → Signer validation
• → Write permission checks
• → Balance validation