diff --git a/tools/gen_signatures_registry.ml b/tools/gen_signatures_registry.ml
index 15dd0ad8..b9595a96 100644
--- a/tools/gen_signatures_registry.ml
+++ b/tools/gen_signatures_registry.ml
@@ -57,38 +57,39 @@ type purpose = {
   comment: string;
 }
 
-let f records =
-  records
-  |> List.filter_map (fun l ->
-      match l with
-      | a :: b :: c :: _ -> (
-          match a.k = "Number" && b.k = "Name" && c.k = "Comment" with
-          | false -> None
-          | true ->
-              Some
-                {
-                  number= Int32.of_int (int_of_string a.v);
-                  name= b.v;
-                  comment= c.v;
-                })
-      | _ -> None)
-  |>
-  (*GNU Taler, >= 1000*)
-  List.filter (fun v -> v.number >= 1000_l)
-
 let read_file file = In_channel.with_open_bin file In_channel.input_all
-let file_header = {|...|}
 
 let () =
   let content = read_file "registry.rec" in
   match parse content with
   | Error msg -> Fmt.failwith "Parse error: %s" msg
   | Ok records ->
-      let purposes = f records in
+      let purposes =
+        records
+        |> List.filter_map (fun l ->
+            match l with
+            | a :: b :: c :: _ -> (
+                match a.k = "Number" && b.k = "Name" && c.k = "Comment" with
+                | false -> None
+                | true ->
+                    Some
+                      {
+                        number= Int32.of_int (int_of_string a.v);
+                        name= String.lowercase_ascii b.v;
+                        comment= c.v;
+                      })
+            | _ -> None)
+        |> List.filter (fun v -> v.number >= 1000_l)
+      in
+
+      let header =
+        {|(* This file was generated from the GANA database:
+   https://git-www.gnunet.org/gana.git/tree/gnunet-signatures/registry.rec *)|}
+      in
 
       let pp_purpose ppf { number; name; comment } =
         Fmt.pf ppf "(** %s *)\nlet %s : int32 = %ld\n\n" comment name number
       in
 
-      Fmt.pr "%a@." (Fmt.list ~sep:Fmt.nop pp_purpose) purposes;
+      Fmt.pr "%s\n\n%a@." header (Fmt.list ~sep:Fmt.nop pp_purpose) purposes;
       ()
diff --git a/uhuh.ml b/uhuh.ml
new file mode 100644
index 00000000..e554c42f
--- /dev/null
+++ b/uhuh.ml
@@ -0,0 +1,280 @@
+(* This file was generated from the GANA database:
+   https://git-www.gnunet.org/gana.git/tree/gnunet-signatures/registry.rec *)
+
+(** Initialize or update the status of an AML key for an AML officer *)
+let MASTER_AML_KEY : int32 = 1017
+
+(** Affirm wiring of exchange profits to operator account. *)
+let MASTER_DRAIN_PROFIT : int32 = 1018
+
+(** Signature affirming a partner configuration for wads. *)
+let MASTER_PARTNER_DETAILS : int32 = 1019
+
+(** The given revocation key was revoked and must no longer be used. *)
+let MASTER_SIGNING_KEY_REVOKED : int32 = 1020
+
+(** Add payto URI to the list of our wire methods. *)
+let MASTER_ADD_WIRE : int32 = 1021
+
+(** Signature over global set of fees charged by the exchange. *)
+let MASTER_GLOBAL_FEES : int32 = 1022
+
+(** Remove payto URI from the list of our wire methods. *)
+let MASTER_DEL_WIRE : int32 = 1023
+
+(** Purpose for signing public keys signed by the exchange master key. *)
+let MASTER_SIGNING_KEY_VALIDITY : int32 = 1024
+
+(** Purpose for denomination keys signed by the exchange master key. *)
+let MASTER_DENOMINATION_KEY_VALIDITY : int32 = 1025
+
+(** Add an auditor to the list of our auditors. *)
+let MASTER_ADD_AUDITOR : int32 = 1026
+
+(** Remove an auditor from the list of our auditors. *)
+let MASTER_DEL_AUDITOR : int32 = 1027
+
+(** Fees charged per (aggregate) wire transfer to the merchant. *)
+let MASTER_WIRE_FEES : int32 = 1028
+
+(** The given revocation key was revoked and must no longer be used. *)
+let MASTER_DENOMINATION_KEY_REVOKED : int32 = 1029
+
+(** Signature where the Exchange confirms its IBAN details in the /wire
+    response. *)
+let MASTER_WIRE_DETAILS : int32 = 1030
+
+(** Set the configuration of an extension (age-restriction or peer2peer) *)
+let MASTER_EXTENSION : int32 = 1031
+
+(** Purpose for the state of a reserve, signed by the exchange's signing key. *)
+let EXCHANGE_RESERVE_STATUS : int32 = 1032
+
+(** Signature where the Exchange confirms a deposit request. *)
+let EXCHANGE_CONFIRM_DEPOSIT : int32 = 1033
+
+(** Signature where the exchange (current signing key) confirms the no-reveal
+    index for cut-and-choose and the validity of the melted coins. *)
+let EXCHANGE_CONFIRM_MELT : int32 = 1034
+
+(** Signature where the Exchange confirms the full /keys response set. *)
+let EXCHANGE_KEY_SET : int32 = 1035
+
+(** Signature where the Exchange confirms the /track/transaction response. *)
+let EXCHANGE_CONFIRM_WIRE : int32 = 1036
+
+(** Signature where the Exchange confirms the /wire/deposit response. *)
+let EXCHANGE_CONFIRM_WIRE_DEPOSIT : int32 = 1037
+
+(** Signature where the Exchange confirms a refund request. *)
+let EXCHANGE_CONFIRM_REFUND : int32 = 1038
+
+(** Signature where the Exchange confirms a recoup. *)
+let EXCHANGE_CONFIRM_RECOUP : int32 = 1039
+
+(** Signature where the Exchange confirms it closed a reserve. *)
+let EXCHANGE_RESERVE_CLOSED : int32 = 1040
+
+(** Signature where the Exchange confirms a recoup-refresh operation. *)
+let EXCHANGE_CONFIRM_RECOUP_REFRESH : int32 = 1041
+
+(** Signature where the Exchange confirms that it does not know a denomination
+    (hash). *)
+let EXCHANGE_AFFIRM_DENOM_UNKNOWN : int32 = 1042
+
+(** Signature where the Exchange confirms that it does not consider a
+    denomination valid for the given operation at this time. *)
+let EXCHANGE_AFFIRM_DENOM_EXPIRED : int32 = 1043
+
+(** Signature by which the exchange affirms that a purse was created with a
+    certain amount deposited into it. *)
+let EXCHANGE_CONFIRM_PURSE_CREATION : int32 = 1045
+
+(** Signature by which the exchange affirms that a purse was merged into a
+    reserve with a certain amount in it. *)
+let EXCHANGE_CONFIRM_PURSE_MERGED : int32 = 1046
+
+(** Purpose for the state of a purse, signed by the exchange's signing key. *)
+let EXCHANGE_PURSE_STATUS : int32 = 1047
+
+(** Signature by which the exchange attests identity attributes of a particular
+    reserve owner. *)
+let EXCHANGE_RESERVE_ATTEST_DETAILS : int32 = 1048
+
+(** Signature by which the exchange confirms that a purse expired and a coin was
+    refunded. *)
+let EXCHANGE_CONFIRM_PURSE_REFUND : int32 = 1049
+
+(** Signature where the Exchange confirms an (age-)withdraw. *)
+let EXCHANGE_CONFIRM_WITHDRAW : int32 = 1050
+
+(** Signature where the auditor confirms that he is aware of certain
+    denomination keys from the exchange. *)
+let AUDITOR_EXCHANGE_KEYS : int32 = 1064
+
+(** Signature where the merchant confirms a contract (to the customer). *)
+let MERCHANT_CONTRACT : int32 = 1101
+
+(** Signature where the merchant confirms a refund (of a coin). *)
+let MERCHANT_REFUND : int32 = 1102
+
+(** Signature where the merchant confirms that he needs the wire transfer
+    identifier for a deposit operation. *)
+let MERCHANT_TRACK_TRANSACTION : int32 = 1103
+
+(** Signature where the merchant confirms that the payment was successful *)
+let MERCHANT_PAYMENT_OK : int32 = 1104
+
+(** Signature where the merchant confirms its own (salted) wire details (not yet
+    really used). *)
+let MERCHANT_WIRE_DETAILS : int32 = 1107
+
+(** Signature where the merchant issues a token by blindly signing it. Signed
+    with the token issue private key. *)
+let MERCHANT_TOKEN_ISSUE : int32 = 1108
+
+(** Signature where the reserve key confirms a withdraw request. Signed with the
+    reserve private key. *)
+let WALLET_RESERVE_WITHDRAW : int32 = 1200
+
+(** Signature made by the wallet of a user to confirm a deposit of a coin. *)
+let WALLET_COIN_DEPOSIT : int32 = 1201
+
+(** Signature using a coin key confirming the melting of a coin. Signed with the
+    coin's private key. *)
+let WALLET_COIN_MELT : int32 = 1202
+
+(** Signature using a coin key requesting recoup. Signed with the coin's private
+    key. *)
+let WALLET_COIN_RECOUP : int32 = 1203
+
+(** Signature using a coin key authenticating link data. Signed with the old
+    coin's private key. *)
+let WALLET_COIN_LINK : int32 = 1204
+
+(** Signature using a reserve key by which a wallet requests a payment target
+    UUID for itself. Signs over just a purpose (no body), as the signature only
+    serves to demonstrate that the request comes from the wallet controlling the
+    private key, and not some third party. *)
+let WALLET_ACCOUNT_SETUP : int32 = 1205
+
+(** Signature using a coin key requesting recoup-refresh. Signed with the coin
+    private key. *)
+let WALLET_COIN_RECOUP_REFRESH : int32 = 1206
+
+(** Signature using a age restriction key for attestation of a particular
+    age/age-group. *)
+let WALLET_AGE_ATTESTATION : int32 = 1207
+
+(** Request full or partial reserve history. Signed with the reserve private
+    key. *)
+let WALLET_RESERVE_HISTORY : int32 = 1208
+
+(** Request full or partial coin history. Signed with the coin private key. *)
+let WALLET_COIN_HISTORY : int32 = 1209
+
+(** Request purse creation (without reserve). Signed by the purse private key.
+*)
+let WALLET_PURSE_CREATE : int32 = 1210
+
+(** Request coin to be deposited into a purse. Signed with the coin private key.
+*)
+let WALLET_PURSE_DEPOSIT : int32 = 1211
+
+(** Request purse status. Signed with the purse private key. *)
+let WALLET_PURSE_STATUS : int32 = 1212
+
+(** Request purse to be merged with a reserve. Signed with the purse private
+    key. *)
+let WALLET_PURSE_MERGE : int32 = 1213
+
+(** Request purse to be merged with a reserve. Signed by the reserve private
+    key. *)
+let WALLET_ACCOUNT_MERGE : int32 = 1214
+
+(** Request account to be closed. Signed with the reserve private key. *)
+let WALLET_RESERVE_CLOSE : int32 = 1215
+
+(** Associates encrypted contract with a purse. Signed with the purse private
+    key. *)
+let WALLET_PURSE_ECONTRACT : int32 = 1216
+
+(** Request reserve to be kept open. Signed with the reserve private key. *)
+let WALLET_RESERVE_OPEN : int32 = 1217
+
+(** Request coin to be used to pay for reserve to be kept open. Signed with the
+    coin private key. *)
+let WALLET_RESERVE_OPEN_DEPOSIT : int32 = 1218
+
+(** Request attestation about reserve owner. Signed by the reserve private key.
+*)
+let WALLET_RESERVE_ATTEST_DETAILS : int32 = 1219
+
+(** Signature by which a wallet requests a purse to be deleted. *)
+let WALLET_PURSE_DELETE : int32 = 1220
+
+(** Signature where the reserve key confirms an age-withdraw request. Signed
+    with the reserve private key. *)
+let WALLET_RESERVE_AGE_WITHDRAW : int32 = 1221
+
+(** Signature where the token use key confirms the usage of a token on a pay
+    request. Signed with the token use private key. *)
+let WALLET_TOKEN_USE : int32 = 1222
+
+(** Signature used to unclaim an order, allowing other wallets to claim it.
+    Signed with the private key of the claim nonce. *)
+let WALLET_ORDER_UNCLAIM : int32 = 1223
+
+(** Signature on a denomination key announcement. *)
+let SM_RSA_DENOMINATION_KEY : int32 = 1250
+
+(** Signature on an exchange message signing key announcement. *)
+let SM_SIGNING_KEY : int32 = 1251
+
+(** Signature on a denomination key announcement. *)
+let SM_CS_DENOMINATION_KEY : int32 = 1252
+
+(** EdDSA test signature. *)
+let CLIENT_TEST_EDDSA : int32 = 1302
+
+(** EdDSA test signature. *)
+let EXCHANGE_TEST_EDDSA : int32 = 1303
+
+(** Signature by which an AML officer signs an AML decision. *)
+let AML_DECISION : int32 = 1350
+
+(** Signature by which an AML officer requests AML data. *)
+let AML_QUERY : int32 = 1351
+
+(** Signature by which an account owner authorizes access to a KYC operation. *)
+let KYC_AUTH : int32 = 1360
+
+(** EdDSA signature for a policy upload. *)
+let ANASTASIS_POLICY_UPLOAD : int32 = 1400
+
+(** EdDSA signature for a backup upload. *)
+let SYNC_BACKUP_UPLOAD : int32 = 1450
+
+(** The signature is done by the Donau. The Donau signes over the total amount
+    of the corresponding year, the corresponding year and the donation
+    identifier of a specific donor. The statement confirms that the donor made
+    this total in donations for the given year. *)
+let DONAU_DONATION_STATEMENT : int32 = 1500
+
+(** The signature is made by a charity and shows that the charity is in
+    agreement with the donation request which it sends to the Donau. The charity
+    signs over all blinded identifiers and key pairs which it has received from
+    the donor. The signature affirms that the charity wants the donation
+    receipts to be issued on its behalf. *)
+let CHARITY_DONATION_CONFIRMATION : int32 = 1501
+
+(** The signature is made by a charity to request information about its status
+    from a Donau. It is not over anything in particular and is just there for
+    access control. *)
+let CHARITY_GET_INFO : int32 = 1502
+
+(** Signature over messages to delete in the mailbox service *)
+let MAILBOX_MESSAGES_DELETE : int32 = 1551
+
+(** Signature for mailbox registration request *)
+let MAILBOX_REGISTER : int32 = 1552