cowprotocol · kaze-cow · Jul 30, 2026 · Aug 3, 2026 · Aug 3, 2026 · Aug 3, 2026
@@ -40,7 +40,7 @@ solana-sdk = "3"
 solana-sdk-ids = "3"
 solana-sha256-hasher = { version = "3", features = ["sha2"] }
 solana-system-interface = "3"
-spl-associated-token-account-interface = { version = "2" }
+spl-associated-token-account-interface = "2"
 spl-token = "9"
 spl-token-interface = "2"
 

@@ -189,6 +189,40 @@ impl From<Initialize> for Instruction {
     }
 }
 
+/// Builder for a `ReclaimBuffer` instruction closing the buffer for each of
+/// `mints`.
+///
+/// **Warning:** any token balance still held by a buffer is burned, not
+/// recovered, before the buffer is closed. Only reclaim buffers expected to
+/// be empty, or to write off dust/dead balances — never one that might still
+/// hold funds of useful value.
-/// **Warning:** any token balance still held by a buffer is burned, not
-/// recovered, before the buffer is closed. Only reclaim buffers expected to
-/// be empty, or to write off dust/dead balances — never one that might still
-/// hold funds of useful value.
+/// **Warning:** if a buffer account has nonzero balance, it will be silently
+/// skipped. This is done to prevent accidental loss of funds.
-/// **Warning:** any token balance still held by a buffer is burned, not
-/// recovered, before the buffer is closed. Only reclaim buffers expected to
-/// be empty, or to write off dust/dead balances — never one that might still
-/// hold funds of useful value.
+/// **Warning:** if a buffer account has nonzero balance, it will be silently
+/// skipped. This is done to prevent accidental loss of funds.
+pub struct ReclaimBuffer<'a> {
+    pub program_id: Pubkey,
+    pub reclaim_authority: Pubkey,
+    pub mints: &'a [Pubkey],
+}
+
+impl From<ReclaimBuffer<'_>> for Instruction {
+    fn from(builder: ReclaimBuffer<'_>) -> Self {
+        let (state_pda, _bump) = find_state_pda(&builder.program_id);
+        let buffers: Vec<(Pubkey, Pubkey)> = builder
+            .mints
+            .iter()
+            .map(|mint| {
+                let (buffer_pda, _bump) = find_buffer_pda(&builder.program_id, mint);
+                (buffer_pda, *mint)
+            })
+            .collect();
+        settlement_interface::instruction::reclaim_buffer::ReclaimBuffer {
+            program_id: builder.program_id,
+            state_pda,
+            reclaim_authority: builder.reclaim_authority,
+            buffers: &buffers,
+        }
+        .into()
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

@@ -11,6 +11,7 @@ use crate::{recover_discriminator, SettlementInstruction};
 pub mod create_buffer;
 pub mod create_order;
 pub mod initialize;
+pub mod reclaim_buffer;
 pub mod reclaim_order;
 pub mod settle;