Create tokenized_assets.rs

pi-nexus-smart-contracts/solana/contracts/tokenized_assets.rs

@@ -0,0 +1,195 @@
+use solana_program::{
+    account_info::{next_account_info, AccountInfo},
+    entrypoint,
+    entrypoint::ProgramResult,
+    msg,
+    program_error::ProgramError,
+    pubkey::Pubkey,
+};
+
+// Define the TokenizedAssetsInstruction enum
+enum TokenizedAssetsInstruction {
+    InitializeTokenizedAsset,
+    MintTokens,
+    BurnTokens,
+    TransferTokens,
+    ApproveTokens,
+}
+
+// Implement the TokenizedAssetsInstruction enum
+impl TokenizedAssetsInstruction {
+    fn unpack(instruction_data: &[u8]) -> Result<TokenizedAssetsInstruction, ProgramError> {
+        if instruction_data.len() != 1 {
+            msg!("Error: Invalid instruction data");
+            return Err(ProgramError::InvalidInstructionData);
+        }
+
+        match instruction_data[0] {
+            0 => Ok(TokenizedAssetsInstruction::InitializeTokenizedAsset),
+            1 => Ok(TokenizedAssetsInstruction::MintTokens),
+            2 => Ok(TokenizedAssetsInstruction::BurnTokens),
+            3 => Ok(TokenizedAssetsInstruction::TransferTokens),
+            4 => Ok(TokenizedAssetsInstruction::ApproveTokens),
+            _ => {
+                msg!("Error: Unknown instruction");
+                Err(ProgramError::InvalidInstruction)
+            }
+        }
+    }
+}
+
+// Define the TokenizedAsset struct
+struct TokenizedAsset {
+    mint: Pubkey,
+    owner: Pubkey,
+    amount: u64,
+}
+
+// Implement the TokenizedAsset struct
+impl TokenizedAsset {
+    fn unpack(account_data: &[u8]) -> Result<TokenizedAsset, ProgramError> {
+        if account_data.len() != 32 + 32 + 8 {
+            msg!("Error: Invalid account data");
+            return Err(ProgramError::InvalidAccountData);
+        }
+
+        let mint = Pubkey::new_from_array(&account_data[0..32]);
+        let owner = Pubkey::new_from_array(&account_data[32..64]);
+        let amount = u64::from_le_bytes(account_data[64..72].try_into().unwrap());
+
+        Ok(TokenizedAsset { mint, owner, amount })
+    }
+}
+
+// Define the program entrypoint
+entrypoint!(process_instruction);
+
+fn process_instruction(
+    program_id: &Pubkey,
+    accounts: &[AccountInfo],
+    instruction_data: &[u8],
+) -> ProgramResult {
+    let instruction = TokenizedAssetsInstruction::unpack(instruction_data)?;
+
+    match instruction {
+        TokenizedAssetsInstruction::InitializeTokenizedAsset => {
+            initialize_tokenized_asset(program_id, accounts)
+        }
+        TokenizedAssetsInstruction::MintTokens => mint_tokens(program_id, accounts),
+        TokenizedAssetsInstruction::BurnTokens => burn_tokens(program_id, accounts),
+        TokenizedAssetsInstruction::TransferTokens => transfer_tokens(program_id, accounts),
+        TokenizedAssetsInstruction::ApproveTokens => approve_tokens(program_id, accounts),
+    }
+}
+
+// Initialize a tokenized asset
+fn initialize_tokenized_asset(program_id: &Pubkey, accounts: &[AccountInfo]) -> ProgramResult {
+    // Get the account infos
+    let tokenized_asset_account_info = next_account_info(accounts)?;
+    let mint_account_info = next_account_info(accounts)?;
+    let owner_account_info = next_account_info(accounts)?;
+
+    // Unpack the accounts
+    let tokenized_asset = TokenizedAsset::unpack(&tokenized_asset_account_info.data.borrow())?;
+
+    // Check that the owner is correct
+    if owner_account_info.key != &tokenized_asset.owner {
+        msg!("Error: Owner mismatch");
+        return Err(ProgramError::Custom(1));
+    }
+
+    // Initialize the tokenized asset
+    tokenized_asset.mint = *mint_account_info.key;
+    tokenized_asset.amount = 0;
+
+    Ok(())
+}
+
+// Mint tokens
+fn mint_tokens(program_id: &Pubkey, accounts: &[AccountInfo]) -> ProgramResult {
+    // Get the account infos
+    let tokenized_asset_account_info = next_account_info(accounts)?;
+    let mint_account_info = next_account_info(accounts)?;
+    let owner_account_info = next_account_info(accounts)?;
+
+    // Unpack the accounts
+    let tokenized_asset = TokenizedAsset::unpack(&tokenized_asset_account_info.data.borrow())?;
+
+    // Check that the owner is correct
+    if owner_account_info.key != &tokenized_asset.owner {
+        msg!("Error: Owner mismatch");
+        return Err(ProgramError::Custom(2));
+    }
+
+    // Mint tokens
+    tokenized_asset.amount += 1;
+
+    Ok(())
+}
+
+// Burn tokens
+fn burn_tokens(program_id: &Pubkey, accounts: &[AccountInfo]) -> ProgramResult {
+    // Get the account infos
+    let tokenized_asset_account_info = next_account_info(accounts)?;
+    let mint_account_info = next_account_info(accounts)?;
+    let owner_account_info = next_account_info(accounts)?;
+
+    // Unpack the accounts
+    let tokenized_asset = TokenizedAsset::unpack(&tokenized_asset_account_info.data.borrow())?;
+
+    // Check that the owner is correct
+    if owner_account_info.key != &tokenized_asset.owner {
+        msg!("Error: Owner mismatch");
+        return Err(ProgramError::Custom(3));
+    }
+
+    // Burn tokens
+    tokenized_asset.amount -= 1;
+
+    Ok(())
+}
+
+// Transfer tokens
+fn transfer_tokens(program_id: &Pubkey, accounts: &[AccountInfo]) -> ProgramResult {
+    // Get the account infos
+    let tokenized_asset_account_info = next_account_info(accounts)?;
+    let recipient_account_info = next_account_info(accounts)?;
+    let owner_account_info = next_account_info(accounts)?;
+
+    // Unpack the accounts
+    let tokenized_asset = TokenizedAsset::unpack(&tokenized_asset_account_info.data.borrow())?;
+
+    // Check that the owner is correct
+    if owner_account_info.key != &tokenized_asset.owner {
+        msg!("Error: Owner mismatch");
+        return Err(ProgramError::Custom(4));
+    }
+
+    // Transfer tokens
+    tokenized_asset.owner = *recipient_account_info.key;
+    tokenized_asset.amount -= 1;
+
+    Ok(())
+}
+
+// Approve tokens
+fn approve_tokens(program_id: &Pubkey, accounts: &[AccountInfo]) -> ProgramResult {
+    // Get the account infos
+    let tokenized_asset_account_info = next_account_info(accounts)?;
+    let spender_account_info = next_account_info(accounts)?;
+    let owner_account_info = next_account_info(accounts)?;
+
+    // Unpack the accounts
+    let tokenized_asset = TokenizedAsset::unpack(&tokenized_asset_account_info.data.borrow())?;
+
+    // Check that the owner is correct
+    if owner_account_info.key != &tokenized_asset.owner {
+        msg!("Error: Owner mismatch");
+        return Err(ProgramError::Custom(5));
+    }
+
+    // Approve tokens
+    // TODO: implement approval logic
+
+    Ok(())
+}