diff --git a/api/src/event.rs b/api/src/event.rs
index 8e74d04..7f0cfb4 100644
--- a/api/src/event.rs
+++ b/api/src/event.rs
@@ -2,9 +2,22 @@ use steel::*;
 
 use crate::state::{RewardConfig, SwapDirection};
 
+pub enum OreEvent {
+    Swap = 0,
+    Reward = 1,
+    Open = 2,
+    Commit = 3,
+    Deposit = 4,
+    Withdraw = 5,
+    Uncommit = 6,
+}
+
 #[repr(C)]
 #[derive(Clone, Copy, Debug, Default, PartialEq, Pod, Zeroable)]
 pub struct SwapEvent {
+    /// The event discriminator.
+    pub disc: u64,
+
     /// The authority of the swap.
     pub authority: Pubkey,
 
@@ -48,6 +61,9 @@ impl SwapEvent {
 #[repr(C)]
 #[derive(Clone, Copy, Debug, Default, PartialEq, Pod, Zeroable)]
 pub struct RewardEvent {
+    /// The event discriminator.
+    pub disc: u64,
+
     /// The amount of ORE distributed as a reward.
     pub amount: u64,
 
@@ -75,6 +91,9 @@ pub enum RewardsType {
 #[repr(C)]
 #[derive(Clone, Copy, Debug, Default, PartialEq, Pod, Zeroable)]
 pub struct OpenEvent {
+    /// The event discriminator.
+    pub disc: u64,
+
     /// The signer of the open transaction.
     pub signer: Pubkey,
 
@@ -119,6 +138,9 @@ pub struct CloseEvent {
 #[repr(C)]
 #[derive(Clone, Copy, Debug, Default, PartialEq, Pod, Zeroable)]
 pub struct CommitEvent {
+    /// The event discriminator.
+    pub disc: u64,
+
     /// The authority of the commit transaction.
     pub authority: Pubkey,
 
@@ -138,6 +160,9 @@ pub struct CommitEvent {
 #[repr(C)]
 #[derive(Clone, Copy, Debug, Default, PartialEq, Pod, Zeroable)]
 pub struct UncommitEvent {
+    /// The event discriminator.
+    pub disc: u64,
+
     /// The authority of the commit transaction.
     pub authority: Pubkey,
 
@@ -157,6 +182,9 @@ pub struct UncommitEvent {
 #[repr(C)]
 #[derive(Clone, Copy, Debug, Default, PartialEq, Pod, Zeroable)]
 pub struct DepositEvent {
+    /// The event discriminator.
+    pub disc: u64,
+
     /// The authority of the commit transaction.
     pub authority: Pubkey,
 
@@ -176,6 +204,9 @@ pub struct DepositEvent {
 #[repr(C)]
 #[derive(Clone, Copy, Debug, Default, PartialEq, Pod, Zeroable)]
 pub struct WithdrawEvent {
+    /// The event discriminator.
+    pub disc: u64,
+
     /// The authority of the commit transaction.
     pub authority: Pubkey,
 
diff --git a/api/src/state/market/buy_exact_in.rs b/api/src/state/market/buy_exact_in.rs
index c95dae1..3fb21dd 100644
--- a/api/src/state/market/buy_exact_in.rs
+++ b/api/src/state/market/buy_exact_in.rs
@@ -1,6 +1,6 @@
 use steel::Pubkey;
 
-use crate::error::OreError;
+use crate::{error::OreError, event::OreEvent};
 
 use super::{Market, SwapDirection, TokenType, VirtualLimitOrder};
 use crate::event::SwapEvent;
@@ -54,6 +54,7 @@ impl Market {
         // Produce swap result.
         let base_out = base_via_ask + base_via_curve;
         let swap_event = SwapEvent {
+            disc: OreEvent::Swap as u64,
             authority: Pubkey::default(),
             block_id: 0,
             direction: SwapDirection::Buy as u64,
diff --git a/api/src/state/market/buy_exact_out.rs b/api/src/state/market/buy_exact_out.rs
index 7410f25..6bfd2d6 100644
--- a/api/src/state/market/buy_exact_out.rs
+++ b/api/src/state/market/buy_exact_out.rs
@@ -1,6 +1,6 @@
 use steel::Pubkey;
 
-use crate::error::OreError;
+use crate::{error::OreError, event::OreEvent};
 
 use super::{Market, SwapDirection, TokenType, VirtualLimitOrder};
 use crate::event::SwapEvent;
@@ -59,6 +59,7 @@ impl Market {
 
         // Produce swap result.
         let swap_event = SwapEvent {
+            disc: OreEvent::Swap as u64,
             authority: Pubkey::default(),
             block_id: 0,
             direction: SwapDirection::Buy as u64,
diff --git a/api/src/state/market/sell_exact_in.rs b/api/src/state/market/sell_exact_in.rs
index 43b3418..41961a4 100644
--- a/api/src/state/market/sell_exact_in.rs
+++ b/api/src/state/market/sell_exact_in.rs
@@ -1,6 +1,6 @@
 use steel::Pubkey;
 
-use crate::error::OreError;
+use crate::{error::OreError, event::OreEvent};
 
 use super::{Market, SwapDirection, TokenType, VirtualLimitOrder};
 use crate::event::SwapEvent;
@@ -63,6 +63,7 @@ impl Market {
         // Produce swap result.
         let quote_out = quote_via_bid + quote_via_curve;
         let swap_event = SwapEvent {
+            disc: OreEvent::Swap as u64,
             authority: Pubkey::default(),
             block_id: 0,
             direction: SwapDirection::Sell as u64,
diff --git a/api/src/state/market/sell_exact_out.rs b/api/src/state/market/sell_exact_out.rs
index fa2e2d5..8ce4eba 100644
--- a/api/src/state/market/sell_exact_out.rs
+++ b/api/src/state/market/sell_exact_out.rs
@@ -1,6 +1,6 @@
 use steel::Pubkey;
 
-use crate::error::OreError;
+use crate::{error::OreError, event::OreEvent};
 
 use super::{Market, SwapDirection, TokenType, VirtualLimitOrder};
 use crate::event::SwapEvent;
@@ -61,6 +61,7 @@ impl Market {
 
         // Produce swap result.
         let swap_event = SwapEvent {
+            disc: OreEvent::Swap as u64,
             authority: Pubkey::default(),
             block_id: 0,
             direction: SwapDirection::Sell as u64,
diff --git a/program/src/close.rs b/program/src/close.rs
index 4942701..50cdb68 100644
--- a/program/src/close.rs
+++ b/program/src/close.rs
@@ -72,6 +72,7 @@ pub fn process_close(accounts: &[AccountInfo<'_>], _data: &[u8]) -> ProgramResul
 
         // Emit event.
         RewardEvent {
+            disc: OreEvent::Reward as u64,
             amount: block.reward.lode_reward,
             authority: block.reward.lode_authority,
             block_id: block.id,
diff --git a/program/src/commit.rs b/program/src/commit.rs
index d262a95..b8f528d 100644
--- a/program/src/commit.rs
+++ b/program/src/commit.rs
@@ -96,6 +96,7 @@ pub fn process_commit(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResul
 
     // Emit event.
     CommitEvent {
+        disc: OreEvent::Commit as u64,
         authority: *signer_info.key,
         block_id: block.id,
         amount,
diff --git a/program/src/deposit.rs b/program/src/deposit.rs
index 6669e42..568a538 100644
--- a/program/src/deposit.rs
+++ b/program/src/deposit.rs
@@ -65,6 +65,7 @@ pub fn process_deposit(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResu
 
     // Emit event.
     DepositEvent {
+        disc: OreEvent::Deposit as u64,
         authority: *signer_info.key,
         block_id: block.id,
         amount,
diff --git a/program/src/mine.rs b/program/src/mine.rs
index 220c2ed..dfbb659 100644
--- a/program/src/mine.rs
+++ b/program/src/mine.rs
@@ -133,6 +133,7 @@ pub fn process_mine(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResult
 
             // Emit event.
             RewardEvent {
+                disc: OreEvent::Reward as u64,
                 amount: motherlode_amount,
                 authority: miner.authority,
                 block_id: block.id,
@@ -161,6 +162,7 @@ pub fn process_mine(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResult
 
         // Emit event.
         RewardEvent {
+            disc: OreEvent::Reward as u64,
             amount: nugget_reward,
             authority: miner.authority,
             block_id: block.id,
diff --git a/program/src/open.rs b/program/src/open.rs
index 225a2c6..c7a6f90 100644
--- a/program/src/open.rs
+++ b/program/src/open.rs
@@ -225,6 +225,7 @@ pub fn process_open(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResult
 
     // Emit event.
     OpenEvent {
+        disc: OreEvent::Open as u64,
         id,
         start_slot,
         signer: *signer_info.key,
diff --git a/program/src/uncommit.rs b/program/src/uncommit.rs
index 8cd2395..0e981b5 100644
--- a/program/src/uncommit.rs
+++ b/program/src/uncommit.rs
@@ -61,6 +61,7 @@ pub fn process_uncommit(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramRes
 
     // Emit event.
     UncommitEvent {
+        disc: OreEvent::Uncommit as u64,
         authority: *signer_info.key,
         block_id: block.id,
         commitment: permit.amount,
diff --git a/program/src/withdraw.rs b/program/src/withdraw.rs
index 95e2b7a..a51cf75 100644
--- a/program/src/withdraw.rs
+++ b/program/src/withdraw.rs
@@ -55,6 +55,7 @@ pub fn process_withdraw(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramRes
 
     // Emit event.
     WithdrawEvent {
+        disc: OreEvent::Withdraw as u64,
         authority: *signer_info.key,
         block_id: stake.block_id,
         amount,