diff --git a/canister_ids.json b/canister_ids.json
index 9659c79..56e436f 100755
--- a/canister_ids.json
+++ b/canister_ids.json
@@ -14,6 +14,9 @@
   "fund_promo": {
     "ic": "cbyw4-uyaaa-aaaag-acmua-cai"
   },
+  "og_claim": {
+    "ic": "cgzqi-zaaaa-aaaag-acmuq-cai"
+  },
   "treasury": {
     "ic": "vne52-waaaa-aaaag-aciva-cai"
   }
diff --git a/dfx.json b/dfx.json
index fbcc795..0c7db20 100644
--- a/dfx.json
+++ b/dfx.json
@@ -24,6 +24,10 @@
     "treasury": {
       "main": "src/treasury.mo",
       "type": "motoko"
+    },
+    "og_claim": {
+      "main": "src/og_claim.mo",
+      "type": "motoko"
     }
   },
   "defaults": {
diff --git a/src/og_claim.mo b/src/og_claim.mo
new file mode 100644
index 0000000..23de6d7
--- /dev/null
+++ b/src/og_claim.mo
@@ -0,0 +1,149 @@
+import HashMap "mo:base/HashMap";
+import Text "mo:base/Text";
+import Iter "mo:base/Iter";
+import Principal "mo:base/Principal";
+import Time "mo:base/Time";
+import Nat "mo:base/Nat";
+
+// ...
+import Ledger "./ledger_service";
+import T "./og_claim_types";
+import C "./_constants"
+
+shared actor class _OG_CLAIM(fs : T.FrontendSecret) = Self {
+    let token = actor (C.ledgerId) : Ledger.Self;
+    let nodeId = "";
+    let adminPrincipal = Principal.fromText(C.admin1);
+    let e8s = 10 ** 8;
+    let og1Amount = 0 * e8s;
+    let og2Amount = 0 * e8s;
+
+    // stable
+
+    private stable var frontendSecret = fs;
+
+    stable var usersOg1Entries : [(T.DiscordUserId, T.User)] = [];
+    let usersOg1 = HashMap.fromIter<T.DiscordUserId, T.User>(usersOg1Entries.vals(), 10, Text.equal, Text.hash);
+
+    stable var usersOg2Entries : [(T.DiscordUserId, T.User)] = [];
+    let usersOg2 = HashMap.fromIter<T.DiscordUserId, T.User>(usersOg2Entries.vals(), 10, Text.equal, Text.hash);
+
+    // funcs
+
+    private func _sendTokens(user : Principal, amount : Nat) : async Ledger.Result {
+        let to : Ledger.Account = { owner = user; subaccount = null };
+
+        let transferArg : Ledger.TransferArg = {
+            to;
+            fee = null;
+            memo = null;
+            from_subaccount = null;
+            created_at_time = null;
+            amount;
+        };
+        await token.icrc1_transfer(transferArg);
+    };
+
+    public shared ({ caller }) func claim(discordUserId : T.DiscordUserId, principalId : Text, role : Text) : async ?Ledger.Result {
+        assert (caller == Principal.fromText(nodeId));
+        var user : T.User = {
+            id = Principal.fromText("");
+            claimed = false;
+            claimPrincipalId = "";
+            claimTimestamp = null;
+        };
+
+        if (role == "og1") {
+            switch (usersOg1.get(discordUserId)) {
+                case (null) return null;
+                case (?u) user := u;
+            };
+        };
+
+        if (role == "og2") {
+            switch (usersOg2.get(discordUserId)) {
+                case (null) return null;
+                case (?u) user := u;
+            };
+        };
+
+        if (not user.claimed) {
+            let id = Principal.fromText(principalId);
+
+            if (role == "og1") {
+                let transferRes = await _sendTokens(id, og1Amount);
+                usersOg1.put(discordUserId, { user with claimed = true; claimTimestamp = ?Time.now() });
+                return ?transferRes;
+            };
+
+            if (role == "og2") {
+                let transferRes = await _sendTokens(id, og2Amount);
+                usersOg2.put(discordUserId, { user with claimed = true; claimTimestamp = ?Time.now() });
+                return ?transferRes;
+            };
+        };
+
+        return null;
+    };
+
+    public shared ({ caller }) func claimFrontend(discordUserId : T.DiscordUserId, role : T.Role, claimPrincipalId : Text, fs : T.FrontendSecret) : async ?Ledger.Result {
+        assert (not Principal.isAnonymous(caller));
+        assert (fs == frontendSecret);
+        var user : T.User = {
+            id = caller;
+            claimed = false;
+            claimPrincipalId = claimPrincipalId;
+            claimTimestamp = null;
+        };
+
+        // verify
+
+        switch (role) {
+            case (#og1) {
+                let transferRes = await _sendTokens(Principal.fromText(claimPrincipalId), og1Amount);
+                usersOg1.put(discordUserId, { user with claimed = true; claimTimestamp = ?Time.now() });
+                return ?transferRes;
+            };
+            case (#og2) {
+                let transferRes = await _sendTokens(Principal.fromText(claimPrincipalId), og2Amount);
+                usersOg2.put(discordUserId, { user with claimed = true; claimTimestamp = ?Time.now() });
+                return ?transferRes;
+            };
+        };
+    };
+
+    // query
+
+    public shared query ({ caller }) func claimedOg1UsersNum() : async Text {
+        if (caller != Principal.fromText(nodeId)) return "";
+        var num = 0;
+        for (user in usersOg1.vals()) if (user.claimed) num += 1;
+        return Nat.toText(num) # "/" # Nat.toText(usersOg1.size());
+    };
+
+    public shared query ({ caller }) func claimedOg2UsersNum() : async Text {
+        if (caller != Principal.fromText(nodeId)) return "";
+        var num = 0;
+        for (user in usersOg2.vals()) if (user.claimed) num += 1;
+        return Nat.toText(num) # "/" # Nat.toText(usersOg2.size());
+    };
+
+    // ...
+
+    public shared ({ caller }) func updateFrontendSecret(newFrontendSecret : T.FrontendSecret) : async () {
+        assert (caller == adminPrincipal);
+        frontendSecret := newFrontendSecret;
+    };
+
+    // state
+
+    system func preupgrade() {
+        usersOg1Entries := Iter.toArray(usersOg1.entries());
+        usersOg2Entries := Iter.toArray(usersOg2.entries());
+    };
+
+    system func postupgrade() {
+        usersOg1Entries := [];
+        usersOg2Entries := [];
+    };
+};
diff --git a/src/og_claim_types.mo b/src/og_claim_types.mo
new file mode 100644
index 0000000..5623059
--- /dev/null
+++ b/src/og_claim_types.mo
@@ -0,0 +1,14 @@
+import Principal "mo:base/Principal";
+module {
+    public type DiscordUserId = Text;
+    public type Tokens = { e8s : Nat };
+    public type FrontendSecret = Text;
+    public type UserId = Principal;
+    public type Role = { #og1; #og2 };
+    public type User = {
+        id : UserId;
+        claimed : Bool;
+        claimPrincipalId : Text;
+        claimTimestamp : ?Int;
+    };
+};