token 2022: add InitializeGroup instruction from SPL Token Group in…

…terface

token/program-2022/Cargo.toml

@@ -27,6 +27,7 @@ solana-program = "1.16.16"
 solana-zk-token-sdk = "1.16.16"
 spl-memo = { version = "4.0.0", path = "../../memo/program", features = [ "no-entrypoint" ] }
 spl-token = { version = "4.0",  path = "../program", features = ["no-entrypoint"] }
+spl-token-group-interface = { version = "0.1.0", path = "../../token-group/interface" }
 spl-token-metadata-interface = { version = "0.2.0", path = "../../token-metadata/interface" }
 spl-transfer-hook-interface = { version = "0.3.0", path = "../transfer-hook-interface" }
 spl-type-length-value = { version = "0.3.0", path = "../../libraries/type-length-value" }

token/program-2022/src/extension/mod.rs

@@ -29,6 +29,7 @@ use {
         program_error::ProgramError,
         program_pack::{IsInitialized, Pack},
     },
+    spl_token_group_interface::state::TokenGroup,
     spl_pod::{
         bytemuck::{pod_from_bytes, pod_from_bytes_mut, pod_get_packed_len},
         primitives::PodU16,
@@ -68,6 +69,8 @@ pub mod non_transferable;
 pub mod permanent_delegate;
 /// Utility to reallocate token accounts
 pub mod reallocate;
+/// Token-group extension
+pub mod token_group;
 /// Token-metadata extension
 pub mod token_metadata;
 /// Transfer Fee extension
@@ -904,6 +907,8 @@ pub enum ExtensionType {
     ConfidentialTransferFeeAmount,
     /// Mint contains a pointer to another account (or the same account) that holds metadata
     MetadataPointer,
+    /// Mint contains token group configurations
+    TokenGroup,
     /// Mint contains token-metadata
     TokenMetadata,
     /// Test variable-length mint extension
@@ -979,6 +984,7 @@ impl ExtensionType {
                 pod_get_packed_len::<ConfidentialTransferFeeAmount>()
             }
             ExtensionType::MetadataPointer => pod_get_packed_len::<MetadataPointer>(),
+            ExtensionType::TokenGroup => pod_get_packed_len::<TokenGroup>(),
             ExtensionType::TokenMetadata => unreachable!(),
             #[cfg(test)]
             ExtensionType::AccountPaddingTest => pod_get_packed_len::<AccountPaddingTest>(),
@@ -1039,6 +1045,7 @@ impl ExtensionType {
             | ExtensionType::TransferHook
             | ExtensionType::ConfidentialTransferFeeConfig
             | ExtensionType::MetadataPointer
+            | ExtensionType::TokenGroup
             | ExtensionType::TokenMetadata => AccountType::Mint,
             ExtensionType::ImmutableOwner
             | ExtensionType::TransferFeeAmount

token/program-2022/src/extension/token_group/mod.rs

@@ -0,0 +1,11 @@
+use {
+    crate::extension::{Extension, ExtensionType},
+    spl_token_group_interface::state::TokenGroup,
+};
+
+/// Instruction processor for the TokenGroup extensions
+pub mod processor;
+
+impl Extension for TokenGroup {
+    const TYPE: ExtensionType = ExtensionType::TokenGroup;
+}

token/program-2022/src/extension/token_group/processor.rs

@@ -0,0 +1,87 @@
+//! Token-group processor
+
+use {
+    crate::{
+        check_program_account,
+        error::TokenError,
+        extension::StateWithExtensions,
+        state::Mint,
+    },
+    solana_program::{
+        account_info::{next_account_info, AccountInfo},
+        entrypoint::ProgramResult,
+        msg,
+        program_error::ProgramError,
+        program_option::COption,
+        pubkey::Pubkey,
+    },
+    spl_token_group_interface::{
+        instruction::{
+            InitializeGroup, TokenGroupInstruction,
+        },
+        state::TokenGroup,
+    },
+    spl_type_length_value::state::TlvStateMut,
+};
+
+/// Processes a [InitializeGroup](enum.TokenGroupInstruction.html) instruction.
+pub fn process_initialize_group(
+    _program_id: &Pubkey,
+    accounts: &[AccountInfo],
+    data: InitializeGroup,
+) -> ProgramResult {
+    let account_info_iter = &mut accounts.iter();
+
+    let group_info = next_account_info(account_info_iter)?;
+    let mint_info = next_account_info(account_info_iter)?;
+    let mint_authority_info = next_account_info(account_info_iter)?;
+
+    // check that the mint and group accounts are the same, since the group
+    // extension should only describe itself
+    if group_info.key != mint_info.key {
+        msg!("Group configurations for a mint must be initialized in the mint itself.");
+        return Err(TokenError::MintMismatch.into());
+    }
+
+    // scope the mint authority check, since the mint is in the same account!
+    {
+        // This check isn't really needed since we'll be writing into the account,
+        // but auditors like it
+        check_program_account(mint_info.owner)?;
+        let mint_data = mint_info.try_borrow_data()?;
+        let mint = StateWithExtensions::<Mint>::unpack(&mint_data)?;
+
+        if !mint_authority_info.is_signer {
+            return Err(ProgramError::MissingRequiredSignature);
+        }
+        if mint.base.mint_authority.as_ref() != COption::Some(mint_authority_info.key) {
+            return Err(TokenError::IncorrectMintAuthority.into());
+        }
+    }
+
+    // Allocate a TLV entry for the space and write it in
+    // Assumes that there's enough SOL for the new rent-exemption
+    let mut buffer = group_info.try_borrow_mut_data()?;
+    let mut state = TlvStateMut::unpack(&mut buffer)?;
+    let (group, _) = state.init_value::<TokenGroup>(false)?;
+    *group = TokenGroup::new(data.update_authority, data.max_size.into());
+
+    Ok(())
+}
+
+/// Processes an [Instruction](enum.Instruction.html).
+pub fn process_instruction(
+    program_id: &Pubkey,
+    accounts: &[AccountInfo],
+    instruction: TokenGroupInstruction,
+) -> ProgramResult {
+    match instruction {
+        TokenGroupInstruction::InitializeGroup(data) => {
+            msg!("TokenGroupInstruction: InitializeGroup");
+            process_initialize_group(program_id, accounts, data)
+        }
+        _ => {
+            Err(ProgramError::InvalidInstructionData)
+        }
+    }
+}

token/program-2022/src/processor.rs

@@ -18,7 +18,7 @@ use {
             mint_close_authority::MintCloseAuthority,
             non_transferable::{NonTransferable, NonTransferableAccount},
             permanent_delegate::{get_permanent_delegate, PermanentDelegate},
-            reallocate, token_metadata,
+            reallocate, token_group, token_metadata,
             transfer_fee::{self, TransferFeeAmount, TransferFeeConfig},
             transfer_hook::{self, TransferHook, TransferHookAccount},
             AccountType, BaseStateWithExtensions, ExtensionType, StateWithExtensions,
@@ -41,6 +41,7 @@ use {
         system_instruction, system_program,
         sysvar::{rent::Rent, Sysvar},
     },
+    spl_token_group_interface::instruction::TokenGroupInstruction,
     spl_token_metadata_interface::instruction::TokenMetadataInstruction,
     std::convert::{TryFrom, TryInto},
 };
@@ -1664,6 +1665,8 @@ impl Processor {
             }
         } else if let Ok(instruction) = TokenMetadataInstruction::unpack(input) {
             token_metadata::processor::process_instruction(program_id, accounts, instruction)
+        } else if let Ok(instruction) = TokenGroupInstruction::unpack(input) {
+            token_group::processor::process_instruction(program_id, accounts, instruction)
         } else {
             Err(TokenError::InvalidInstruction.into())
         }