diff --git a/solana/programs/matching-engine/src/events/enacted.rs b/solana/programs/matching-engine/src/events/enacted.rs
new file mode 100644
index 000000000..bf60f1ce4
--- /dev/null
+++ b/solana/programs/matching-engine/src/events/enacted.rs
@@ -0,0 +1,7 @@
+use crate::state::ProposalAction;
+use anchor_lang::prelude::*;
+
+#[event]
+pub struct Enacted {
+    pub action: ProposalAction,
+}
diff --git a/solana/programs/matching-engine/src/events/mod.rs b/solana/programs/matching-engine/src/events/mod.rs
index c1a7f2337..6e969aecf 100644
--- a/solana/programs/matching-engine/src/events/mod.rs
+++ b/solana/programs/matching-engine/src/events/mod.rs
@@ -4,5 +4,11 @@ pub use auction_settled::*;
 mod auction_updated;
 pub use auction_updated::*;
 
+mod enacted;
+pub use enacted::*;
+
 mod order_executed;
 pub use order_executed::*;
+
+mod proposed;
+pub use proposed::*;
diff --git a/solana/programs/matching-engine/src/events/proposed.rs b/solana/programs/matching-engine/src/events/proposed.rs
new file mode 100644
index 000000000..d8a3909f6
--- /dev/null
+++ b/solana/programs/matching-engine/src/events/proposed.rs
@@ -0,0 +1,7 @@
+use crate::state::ProposalAction;
+use anchor_lang::prelude::*;
+
+#[event]
+pub struct Proposed {
+    pub action: ProposalAction,
+}
diff --git a/solana/programs/matching-engine/src/processor/admin/propose/auction_parameters.rs b/solana/programs/matching-engine/src/processor/admin/propose/auction_parameters.rs
index bfe39ff5a..a1878afaf 100644
--- a/solana/programs/matching-engine/src/processor/admin/propose/auction_parameters.rs
+++ b/solana/programs/matching-engine/src/processor/admin/propose/auction_parameters.rs
@@ -35,6 +35,8 @@ pub fn propose_auction_parameters(
     crate::utils::auction::require_valid_parameters(&parameters)?;
 
     let id = ctx.accounts.admin.custodian.auction_config_id + 1;
+    let action = ProposalAction::UpdateAuctionParameters { id, parameters };
+
     super::propose(
         super::Propose {
             custodian: &ctx.accounts.admin.custodian,
@@ -42,7 +44,13 @@ pub fn propose_auction_parameters(
             by: &ctx.accounts.admin.owner_or_assistant,
             epoch_schedule: &ctx.accounts.epoch_schedule,
         },
-        ProposalAction::UpdateAuctionParameters { id, parameters },
+        action,
         ctx.bumps.proposal,
-    )
+    )?;
+
+    // Emit event reflecting the proposal.
+    emit!(crate::events::Proposed { action });
+
+    // Done.
+    Ok(())
 }
diff --git a/solana/programs/matching-engine/src/processor/admin/update/auction_parameters.rs b/solana/programs/matching-engine/src/processor/admin/update/auction_parameters.rs
index 259792f00..4f8415fad 100644
--- a/solana/programs/matching-engine/src/processor/admin/update/auction_parameters.rs
+++ b/solana/programs/matching-engine/src/processor/admin/update/auction_parameters.rs
@@ -65,8 +65,12 @@ pub struct UpdateAuctionParameters<'info> {
 }
 
 pub fn update_auction_parameters(ctx: Context<UpdateAuctionParameters>) -> Result<()> {
-    if let ProposalAction::UpdateAuctionParameters { id, parameters } = ctx.accounts.proposal.action
-    {
+    let action = ctx.accounts.proposal.action;
+
+    // Emit event to reflect enacting the proposal.
+    emit!(crate::events::Enacted { action });
+
+    if let ProposalAction::UpdateAuctionParameters { id, parameters } = action {
         ctx.accounts
             .auction_config
             .set_inner(AuctionConfig { id, parameters });
diff --git a/solana/programs/matching-engine/src/state/proposal.rs b/solana/programs/matching-engine/src/state/proposal.rs
index aba756d79..e1c849c87 100644
--- a/solana/programs/matching-engine/src/state/proposal.rs
+++ b/solana/programs/matching-engine/src/state/proposal.rs
@@ -2,7 +2,7 @@ use anchor_lang::prelude::*;
 
 use crate::AuctionParameters;
 
-#[derive(Debug, AnchorSerialize, AnchorDeserialize, Clone, InitSpace, PartialEq, Eq)]
+#[derive(Debug, AnchorSerialize, AnchorDeserialize, Clone, InitSpace, PartialEq, Eq, Copy)]
 pub enum ProposalAction {
     None,
     UpdateAuctionParameters {
diff --git a/solana/target/idl/matching_engine.json b/solana/target/idl/matching_engine.json
index 23874fe29..6af3c6c29 100644
--- a/solana/target/idl/matching_engine.json
+++ b/solana/target/idl/matching_engine.json
@@ -3125,6 +3125,18 @@
         }
       ]
     },
+    {
+      "name": "Enacted",
+      "fields": [
+        {
+          "name": "action",
+          "type": {
+            "defined": "ProposalAction"
+          },
+          "index": false
+        }
+      ]
+    },
     {
       "name": "OrderExecuted",
       "fields": [
@@ -3146,6 +3158,18 @@
           "index": false
         }
       ]
+    },
+    {
+      "name": "Proposed",
+      "fields": [
+        {
+          "name": "action",
+          "type": {
+            "defined": "ProposalAction"
+          },
+          "index": false
+        }
+      ]
     }
   ],
   "errors": [
diff --git a/solana/target/types/matching_engine.ts b/solana/target/types/matching_engine.ts
index c0f9c665c..a8660e492 100644
--- a/solana/target/types/matching_engine.ts
+++ b/solana/target/types/matching_engine.ts
@@ -3125,6 +3125,18 @@ export type MatchingEngine = {
         }
       ]
     },
+    {
+      "name": "Enacted",
+      "fields": [
+        {
+          "name": "action",
+          "type": {
+            "defined": "ProposalAction"
+          },
+          "index": false
+        }
+      ]
+    },
     {
       "name": "OrderExecuted",
       "fields": [
@@ -3146,6 +3158,18 @@ export type MatchingEngine = {
           "index": false
         }
       ]
+    },
+    {
+      "name": "Proposed",
+      "fields": [
+        {
+          "name": "action",
+          "type": {
+            "defined": "ProposalAction"
+          },
+          "index": false
+        }
+      ]
     }
   ],
   "errors": [
@@ -6487,6 +6511,18 @@ export const IDL: MatchingEngine = {
         }
       ]
     },
+    {
+      "name": "Enacted",
+      "fields": [
+        {
+          "name": "action",
+          "type": {
+            "defined": "ProposalAction"
+          },
+          "index": false
+        }
+      ]
+    },
     {
       "name": "OrderExecuted",
       "fields": [
@@ -6508,6 +6544,18 @@ export const IDL: MatchingEngine = {
           "index": false
         }
       ]
+    },
+    {
+      "name": "Proposed",
+      "fields": [
+        {
+          "name": "action",
+          "type": {
+            "defined": "ProposalAction"
+          },
+          "index": false
+        }
+      ]
     }
   ],
   "errors": [
diff --git a/solana/ts/src/matchingEngine/index.ts b/solana/ts/src/matchingEngine/index.ts
index f05183b99..00a1c7941 100644
--- a/solana/ts/src/matchingEngine/index.ts
+++ b/solana/ts/src/matchingEngine/index.ts
@@ -43,6 +43,7 @@ import {
     MessageProtocol,
     PreparedOrderResponse,
     Proposal,
+    ProposalAction,
     RedeemedFastFill,
     RouterEndpoint,
 } from "./state";
@@ -155,6 +156,14 @@ export type OrderExecuted = {
     targetProtocol: MessageProtocol;
 };
 
+export type Proposed = {
+    action: ProposalAction;
+};
+
+export type Enacted = {
+    action: ProposalAction;
+};
+
 export class MatchingEngineProgram {
     private _programId: ProgramId;
     private _mint: PublicKey;
@@ -189,6 +198,14 @@ export class MatchingEngineProgram {
         return this.program.addEventListener("OrderExecuted", callback);
     }
 
+    onProposed(callback: (event: Proposed, slot: number, signature: string) => void) {
+        return this.program.addEventListener("Proposed", callback);
+    }
+
+    onEnacted(callback: (event: Enacted, slot: number, signature: string) => void) {
+        return this.program.addEventListener("Enacted", callback);
+    }
+
     custodianAddress(): PublicKey {
         return Custodian.address(this.ID);
     }