feat(fraud-proofs): Implement FinalizeCommitment

dlp-api/src/v2/instruction.rs

@@ -25,6 +25,8 @@ pub enum DlpV2Instruction {
     /// InitStateBuffer takes more arguments and AppendStateBuffer takes as less as
     /// possible. 
     WriteStateBuffer = 107,
+    /// Applies an approved v2 commitment to the delegated account.
+    FinalizeCommitment = 108,
 }
 
 impl DlpV2Instruction {

dlp-api/src/v2/instruction_builder/finalize_commitment.rs

@@ -0,0 +1,62 @@
+use solana_program::{
+    instruction::{AccountMeta, Instruction},
+    pubkey::Pubkey,
+};
+use solana_sdk_ids::system_program;
+
+use crate::{
+    compat::{Compatize, Modernize},
+    pda::{
+        delegation_metadata_pda_from_delegated_account,
+        delegation_record_pda_from_delegated_account,
+    },
+    v2::{
+        pda::{pending_commitment_pda, state_buffer_pda},
+        DlpV2Instruction,
+    },
+};
+
+/// Builds the instruction that finalizes one approved v2 commitment.
+pub fn finalize_commitment(
+    operator: Pubkey,
+    account: Pubkey,
+    commit_id: u64,
+) -> Instruction {
+    Instruction {
+        program_id: crate::id().modernize(),
+        accounts: vec![
+            AccountMeta::new(operator, true),
+            AccountMeta::new(
+                pending_commitment_pda(&account.compatize(), commit_id)
+                    .modernize(),
+                false,
+            ),
+            AccountMeta::new(account, false),
+            AccountMeta::new(
+                delegation_record_pda_from_delegated_account(
+                    &account.compatize(),
+                )
+                .modernize(),
+                false,
+            ),
+            AccountMeta::new(
+                delegation_metadata_pda_from_delegated_account(
+                    &account.compatize(),
+                )
+                .modernize(),
+                false,
+            ),
+            AccountMeta::new_readonly(
+                state_buffer_pda(
+                    &account.compatize(),
+                    commit_id,
+                    &operator.compatize(),
+                )
+                .modernize(),
+                false,
+            ),
+            AccountMeta::new_readonly(system_program::id(), false),
+        ],
+        data: DlpV2Instruction::FinalizeCommitment.to_vec(),
+    }
+}

dlp-api/src/v2/instruction_builder/mod.rs

@@ -1,4 +1,5 @@
 mod approve_commitment;
+mod finalize_commitment;
 mod init_protocol_config;
 mod post_commitment;
 mod register_operator;
@@ -8,6 +9,7 @@ mod update_verifier_registry;
 mod write_state_buffer;
 
 pub use approve_commitment::*;
+pub use finalize_commitment::*;
 pub use init_protocol_config::*;
 pub use post_commitment::*;
 pub use register_operator::*;