diff --git a/src/signatures.ml b/src/signatures.ml
index dbb0d892..8fa4c5d3 100644
--- a/src/signatures.ml
+++ b/src/signatures.ml
@@ -153,7 +153,7 @@ end
 module DenominationKeyAnnouncement = struct
   module R = struct
     (* CS: use purpose TALER_SIGNATURE_SM_CS_DENOMINATION_KEY *)
-    (* purpose.purpose = TALER_SIGNATURE_SM_RSA_DENOMINATION_KEY *)
+    (* purpose = TALER_SIGNATURE_SM_RSA_DENOMINATION_KEY *)
     type r = {
       h_denom_pub: DenominationHash.t;
       h_section_name: Hash.Cstring.H64.t;
@@ -182,7 +182,7 @@ end
 
 module SigningKeyAnnouncement = struct
   module R = struct
-    (* purpose.purpose = TALER_SIGNATURE_SM_SIGNING_KEY *)
+    (* purpose = TALER_SIGNATURE_SM_SIGNING_KEY *)
     type r = {
       exchange_pub: ExchangePublicKeyP.t;
       anchor_time: Timestamp.t;
@@ -206,7 +206,7 @@ end
 
 module DenominationKeyValidity = struct
   module R = struct
-    (* purpose.purpose = TALER_SIGNATURE_MASTER_DENOMINATION_KEY_VALIDITY *)
+    (* purpose = TALER_SIGNATURE_MASTER_DENOMINATION_KEY_VALIDITY *)
     type r = {
       master: MasterPublicKeyP.t;
       start: Timestamp.t;
@@ -274,7 +274,7 @@ end
 
 module ExchangeSigningKeyValidity = struct
   module R = struct
-    (* purpose.purpose = TALER_SIGNATURE_MASTER_SIGNING_KEY_VALIDITY *)
+    (* purpose = TALER_SIGNATURE_MASTER_SIGNING_KEY_VALIDITY *)
     type r = {
       start: Timestamp.t;
       expire: Timestamp.t;
@@ -301,7 +301,7 @@ end
 
 module MasterDenominationKeyRevocation = struct
   module R = struct
-    (* purpose.purpose = TALER_SIGNATURE_MASTER_DENOMINATION_KEY_REVOKED. *)
+    (* purpose = TALER_SIGNATURE_MASTER_DENOMINATION_KEY_REVOKED. *)
     type r = { h_denom_pub: DenominationHash.t }
 
     let bin =
@@ -319,7 +319,7 @@ end
 
 module MasterSigningKeyRevocation = struct
   module R = struct
-    (* purpose.purpose = TALER_SIGNATURE_MASTER_SIGNING_KEY_REVOKED *)
+    (* purpose = TALER_SIGNATURE_MASTER_SIGNING_KEY_REVOKED *)
     type r = { exchange_pub: ExchangePublicKeyP.t }
 
     let bin =
@@ -337,7 +337,7 @@ end
 
 module MasterAddAuditor = struct
   module R = struct
-    (* purpose.purpose = TALER_SIGNATURE_MASTER_ADD_AUDITOR *)
+    (* purpose = TALER_SIGNATURE_MASTER_ADD_AUDITOR *)
     type r = {
       start_date: Timestamp.t;
       auditor_pub: AuditorPublicKeyP.t;
@@ -361,7 +361,7 @@ end
 
 module MasterDelAuditor = struct
   module R = struct
-    (* purpose.purpose = TALER_SIGNATURE_MASTER_DEL_AUDITOR *)
+    (* purpose = TALER_SIGNATURE_MASTER_DEL_AUDITOR *)
     type r = {
       end_date: Timestamp.t;
       auditor_pub: AuditorPublicKeyP.t;
@@ -383,7 +383,7 @@ end
 module GlobalFees = struct
   module R = struct
     (* TODO signatures taler doc *)
-    (* purpose.purpose = TALER_SIGNATURE_MASTER_GLOBAL_FEES *)
+    (* purpose = TALER_SIGNATURE_MASTER_GLOBAL_FEES *)
     type r = {
       start_date: Timestamp.t;
       end_date: Timestamp.t;
@@ -437,7 +437,7 @@ end
 
 module MasterWireDetails = struct
   module R = struct
-    (* purpose.purpose = TALER_SIGNATURE_MASTER_WIRE_DETAILS *)
+    (* purpose = TALER_SIGNATURE_MASTER_WIRE_DETAILS *)
     type r = {
       h_wire_details: FullPaytoHash.t;
       h_conversion_url: Hash.Cstring.H64.t;
@@ -475,7 +475,7 @@ end
 
 module MasterAddWire = struct
   module R = struct
-    (* purpose.purpose = TALER_SIGNATURE_MASTER_ADD_WIRE *)
+    (* purpose = TALER_SIGNATURE_MASTER_ADD_WIRE *)
     type r = {
       start_date: Timestamp.t;
       h_wire: FullPaytoHash.t;
@@ -517,7 +517,7 @@ end
 
 module MasterDelWire = struct
   module R = struct
-    (* purpose.purpose = TALER_SIGNATURE_MASTER_DEL_WIRE *)
+    (* purpose = TALER_SIGNATURE_MASTER_DEL_WIRE *)
     type r = {
       end_date: Timestamp.t;
       h_wire: FullPaytoHash.t;
@@ -538,7 +538,7 @@ end
 
 module MasterDrainProfit = struct
   module R = struct
-    (* purpose.purpose = TALER_SIGNATURE_MASTER_DRAIN_PROFITS *)
+    (* purpose = TALER_SIGNATURE_MASTER_DRAIN_PROFITS *)
     type r = {
       wtid: WireTransferIdentifierRawP.t;
       date: Timestamp.t;
@@ -566,7 +566,7 @@ end
 
 module MasterAmlOfficerStatus = struct
   module R = struct
-    (* purpose.purpose = TALER_SIGNATURE_MASTER_AML_KEY *)
+    (* purpose = TALER_SIGNATURE_MASTER_AML_KEY *)
     type r = {
       change_date: Timestamp.t;
       officer_pub: AmlOfficerPublicKeyP.t;
@@ -592,7 +592,7 @@ end
 
 module PartnerConfiguration = struct
   module R = struct
-    (* purpose.purpose = TALER_SIGNATURE_MASTER_PARNTER_DETAILS *)
+    (* purpose = TALER_SIGNATURE_MASTER_PARNTER_DETAILS *)
     type r = {
       partner_pub: MasterPublicKeyP.t;
       start_date: Timestamp.t;
@@ -631,7 +631,7 @@ end
 
 module WadPartnerSignature = struct
   module R = struct
-    (* purpose.purpose = TALER_SIGNATURE_MASTER_PARTNER_DETAILS *)
+    (* purpose = TALER_SIGNATURE_MASTER_PARTNER_DETAILS *)
     type r = {
       h_partner_base_url: Hash.Cstring.H64.t;
       master_public_key: MasterPublicKeyP.t;
@@ -678,7 +678,7 @@ end
 
 module MasterWireFee = struct
   module R = struct
-    (* purpose.purpose = TALER_SIGNATURE_MASTER_WIRE_FEES *)
+    (* purpose = TALER_SIGNATURE_MASTER_WIRE_FEES *)
     type r = {
       h_wire_method: Hash.Cstring.H64.t;
       start_date: Timestamp.t;
@@ -707,7 +707,7 @@ end
 
 module ExchangeKeyValidity = struct
   module R = struct
-    (* purpose.purpose = TALER_SIGNATURE_AUDITOR_EXCHANGE_KEYS *)
+    (* purpose = TALER_SIGNATURE_AUDITOR_EXCHANGE_KEYS *)
     type r = {
       auditor_url_hash: Hash.Cstring.H64.t;
       master: MasterPublicKeyP.t;
@@ -773,7 +773,7 @@ end
 
 module ExchangeKeySet = struct
   module R = struct
-    (* purpose.purpose = TALER_SIGNATURE_EXCHANGE_KEY_SET *)
+    (* purpose = TALER_SIGNATURE_EXCHANGE_KEY_SET *)
     type r = {
       list_issue_date: Timestamp.t;
       (* hash over a concatenation of master_sigs *)
@@ -842,7 +842,7 @@ module WithdrawConfirmation = struct
 end
 
 module SingleWithdrawRequest = struct
-  (* purpose.purpose = TALER_SIGNATURE_WALLET_RESERVE_WITHDRAW *)
+  (* purpose = TALER_SIGNATURE_WALLET_RESERVE_WITHDRAW *)
   type t = {
     amount_with_fee: Amount.t;
     h_denomination_pub: DenominationHash.t;
@@ -851,7 +851,7 @@ module SingleWithdrawRequest = struct
 end
 
 module DepositRequest = struct
-  (* purpose.purpose = TALER_SIGNATURE_WALLET_COIN_DEPOSIT *)
+  (* purpose = TALER_SIGNATURE_WALLET_COIN_DEPOSIT *)
   type t = {
     h_contract_terms: PrivateContractHash.t;
     h_age_commitment: AgeCommitmentHash.t;
@@ -868,7 +868,7 @@ module DepositRequest = struct
 end
 
 module DepositConfirmation = struct
-  (* purpose.purpose = TALER_SIGNATURE_EXCHANGE_CONFIRM_DEPOSIT *)
+  (* purpose = TALER_SIGNATURE_EXCHANGE_CONFIRM_DEPOSIT *)
   type t = {
     h_contract_terms: PrivateContractHash.t;
     h_wire: MerchantWireHash.t;
@@ -882,7 +882,7 @@ module DepositConfirmation = struct
 end
 
 module RefreshMeltCoinAffirmation = struct
-  (* purpose.purpose = TALER_SIGNATURE_WALLET_COIN_MELT *)
+  (* purpose = TALER_SIGNATURE_WALLET_COIN_MELT *)
   type t = {
     session_hash: RefreshCommitmentP.t;
     h_denom_pub: DenominationHash.t;
@@ -893,7 +893,7 @@ module RefreshMeltCoinAffirmation = struct
 end
 
 module RefreshMeltConfirmation = struct
-  (* purpose.purpose = TALER_SIGNATURE_EXCHANGE_CONFIRM_MELT *)
+  (* purpose = TALER_SIGNATURE_EXCHANGE_CONFIRM_MELT *)
   type t = {
     session_hash: RefreshCommitmentP.t;
     noreveal_index: int; (* uint16_t mapped to OCaml int *)
@@ -901,7 +901,7 @@ module RefreshMeltConfirmation = struct
 end
 
 module DepositTrack = struct
-  (* purpose.purpose = TALER_SIGNATURE_MERCHANT_TRACK_TRANSACTION *)
+  (* purpose = TALER_SIGNATURE_MERCHANT_TRACK_TRANSACTION *)
   type t = {
     h_contract_terms: PrivateContractHash.t;
     h_wire: MerchantWireHash.t;
@@ -920,7 +920,7 @@ module WireDepositDetailP = struct
 end
 
 module WireDepositData = struct
-  (* purpose.purpose = TALER_SIGNATURE_EXCHANGE_CONFIRM_WIRE_DEPOSIT *)
+  (* purpose = TALER_SIGNATURE_EXCHANGE_CONFIRM_WIRE_DEPOSIT *)
   type t = {
     total: Amount.t;
     wire_fee: Amount.t;
@@ -931,17 +931,17 @@ module WireDepositData = struct
 end
 
 module PaymentResponse = struct
-  (* purpose.purpose = TALER_SIGNATURE_MERCHANT_PAYMENT_OK *)
+  (* purpose = TALER_SIGNATURE_MERCHANT_PAYMENT_OK *)
   type t = { h_contract_terms: PrivateContractHash.t }
 end
 
 module Contract = struct
-  (* purpose.purpose = TALER_SIGNATURE_MERCHANT_CONTRACT *)
+  (* purpose = TALER_SIGNATURE_MERCHANT_CONTRACT *)
   type t = { h_contract_terms: PrivateContractHash.t }
 end
 
 module ConfirmWire = struct
-  (* purpose.purpose = TALER_SIGNATURE_EXCHANGE_CONFIRM_WIRE *)
+  (* purpose = TALER_SIGNATURE_EXCHANGE_CONFIRM_WIRE *)
   type t = {
     h_wire: MerchantWireHash.t;
     h_contract_terms: PrivateContractHash.t;
@@ -953,7 +953,7 @@ module ConfirmWire = struct
 end
 
 module RefundConfirmation = struct
-  (* purpose.purpose = TALER_SIGNATURE_EXCHANGE_CONFIRM_REFUND *)
+  (* purpose = TALER_SIGNATURE_EXCHANGE_CONFIRM_REFUND *)
   type t = {
     h_contract_terms: PrivateContractHash.t;
     coin_pub: CoinSpendPublicKeyP.t;
@@ -964,7 +964,7 @@ module RefundConfirmation = struct
 end
 
 module DepositTrackPS2 = struct
-  (* purpose.purpose = TALER_SIGNATURE_MERCHANT_TRACK_TRANSACTION *)
+  (* purpose = TALER_SIGNATURE_MERCHANT_TRACK_TRANSACTION *)
   type t = {
     h_contract_terms: PrivateContractHash.t;
     h_wire: MerchantWireHash.t;
@@ -974,7 +974,7 @@ module DepositTrackPS2 = struct
 end
 
 module RefundRequest = struct
-  (* purpose.purpose = TALER_SIGNATURE_MERCHANT_REFUND *)
+  (* purpose = TALER_SIGNATURE_MERCHANT_REFUND *)
   type t = {
     h_contract_terms: PrivateContractHash.t;
     coin_pub: CoinSpendPublicKeyP.t;
@@ -985,13 +985,13 @@ module RefundRequest = struct
 end
 
 module MerchantRefundConfirmation = struct
-  (* purpose.purpose = TALER_SIGNATURE_MERCHANT_REFUND_OK *)
+  (* purpose = TALER_SIGNATURE_MERCHANT_REFUND_OK *)
   (* Hash of the order ID (a string), hashed without the 0-termination. *)
   type t = { h_order_id: Hash.Cstring.H64.t }
 end
 
 module RecoupRequest = struct
-  (* purpose.purpose = TALER_SIGNATURE_WALLET_COIN_RECOUP or TALER_SIGNATURE_WALLET_COIN_RECOUP_REFRESH *)
+  (* purpose = TALER_SIGNATURE_WALLET_COIN_RECOUP or TALER_SIGNATURE_WALLET_COIN_RECOUP_REFRESH *)
   type t = {
     h_denom_pub: DenominationHash.t;
     coin_blind: DenominationBlindingKeyP.t;
@@ -999,7 +999,7 @@ module RecoupRequest = struct
 end
 
 module RecoupRefreshConfirmation = struct
-  (* purpose.purpose = TALER_SIGNATURE_EXCHANGE_CONFIRM_RECOUP_REFRESH *)
+  (* purpose = TALER_SIGNATURE_EXCHANGE_CONFIRM_RECOUP_REFRESH *)
   type t = {
     timestamp: Timestamp.t;
     recoup_amount: Amount.t;
@@ -1009,7 +1009,7 @@ module RecoupRefreshConfirmation = struct
 end
 
 module RecoupConfirmation = struct
-  (* purpose.purpose = TALER_SIGNATURE_EXCHANGE_CONFIRM_RECOUP *)
+  (* purpose = TALER_SIGNATURE_EXCHANGE_CONFIRM_RECOUP *)
   type t = {
     timestamp: Timestamp.t;
     recoup_amount: Amount.t;
@@ -1019,7 +1019,7 @@ module RecoupConfirmation = struct
 end
 
 module DenominationUnknownAffirmation = struct
-  (* purpose.purpose = TALER_SIGNATURE_EXCHANGE_AFFIRM_DENOM_UNKNOWN *)
+  (* purpose = TALER_SIGNATURE_EXCHANGE_AFFIRM_DENOM_UNKNOWN *)
   type t = {
     timestamp: Timestamp.t;
     h_denom_pub: DenominationHash.t;
@@ -1027,7 +1027,7 @@ module DenominationUnknownAffirmation = struct
 end
 
 module DenominationExpiredAffirmation = struct
-  (* purpose.purpose = TALER_SIGNATURE_EXCHANGE_GENERIC_DENOMINATIN_EXPIRED *)
+  (* purpose = TALER_SIGNATURE_EXCHANGE_GENERIC_DENOMINATIN_EXPIRED *)
   type t = {
     timestamp: Timestamp.t;
     operation: string; (* char[8] → string *)
@@ -1036,7 +1036,7 @@ module DenominationExpiredAffirmation = struct
 end
 
 module ReserveCloseConfirmation = struct
-  (* purpose.purpose = TALER_SIGNATURE_EXCHANGE_RESERVE_CLOSED *)
+  (* purpose = TALER_SIGNATURE_EXCHANGE_RESERVE_CLOSED *)
   type t = {
     timestamp: Timestamp.t;
     closing_amount: Amount.t;
@@ -1046,7 +1046,7 @@ module ReserveCloseConfirmation = struct
 end
 
 module CoinLinkSignature = struct
-  (* purpose.purpose = TALER_SIGNATURE_WALLET_COIN_LINK *)
+  (* purpose = TALER_SIGNATURE_WALLET_COIN_LINK *)
   type t = {
     h_denom_pub: DenominationHash.t;
     old_coin_pub: CoinSpendPublicKeyP.t;
@@ -1056,17 +1056,17 @@ module CoinLinkSignature = struct
 end
 
 module RefreshNonceSignature = struct
-  (* purpose.purpose = TALER_SIGNATURE_WALLET_COIN_LINK *)
+  (* purpose = TALER_SIGNATURE_WALLET_COIN_LINK *)
   type t = { nonce: PublicRefreshCoinNonceP.t }
 end
 
 module ReserveStatusRequestSignature = struct
-  (* purpose.purpose = TALER_SIGNATURE_RESERVE_STATUS_REQUEST *)
+  (* purpose = TALER_SIGNATURE_RESERVE_STATUS_REQUEST *)
   type t = { request_timestamp: Timestamp.t }
 end
 
 module ReserveHistoryRequestSignature = struct
-  (* purpose.purpose = TALER_SIGNATURE_RESERVE_HISTORY_REQUEST *)
+  (* purpose = TALER_SIGNATURE_RESERVE_HISTORY_REQUEST *)
   type t = {
     history_fee: Amount.t;
     request_timestamp: Timestamp.t;
@@ -1074,12 +1074,12 @@ module ReserveHistoryRequestSignature = struct
 end
 
 module PurseStatusRequestSignature = struct
-  (* purpose.purpose = TALER_SIGNATURE_PURSE_STATUS_REQUEST *)
+  (* purpose = TALER_SIGNATURE_PURSE_STATUS_REQUEST *)
   type t = unit
 end
 
 module PurseStatusResponseSignature = struct
-  (* purpose.purpose = TALER_SIGNATURE_PURSE_STATUS_RESPONSE *)
+  (* purpose = TALER_SIGNATURE_PURSE_STATUS_RESPONSE *)
   type t = {
     total_purse_amount: Amount.t;
     total_deposit_amount: Amount.t;
@@ -1091,12 +1091,12 @@ module PurseStatusResponseSignature = struct
 end
 
 module ReserveCloseRequestSignature = struct
-  (* purpose.purpose = TALER_SIGNATURE_WALLET_RESERVE_CLOSE *)
+  (* purpose = TALER_SIGNATURE_WALLET_RESERVE_CLOSE *)
   type t = unit
 end
 
 module PurseRequestSignature = struct
-  (* purpose.purpose = TALER_SIGNATURE_WALLET_PURSE_CREATE *)
+  (* purpose = TALER_SIGNATURE_WALLET_PURSE_CREATE *)
   type t = {
     purse_expiration: Timestamp.t;
     merge_value_after_fees: Amount.t;
@@ -1106,7 +1106,7 @@ module PurseRequestSignature = struct
 end
 
 module PurseDepositSignature = struct
-  (* purpose.purpose = TALER_SIGNATURE_PURSE_DEPOSIT *)
+  (* purpose = TALER_SIGNATURE_PURSE_DEPOSIT *)
   type t = {
     coin_contribution: Amount.t;
     h_denom_pub: DenominationHash.t;
@@ -1117,7 +1117,7 @@ module PurseDepositSignature = struct
 end
 
 module PurseDepositSignaturePS2 = struct
-  (* purpose.purpose = TALER_SIGNATURE_WALLET_RESERVE_OPEN_DEPOSIT *)
+  (* purpose = TALER_SIGNATURE_WALLET_RESERVE_OPEN_DEPOSIT *)
   type t = {
     reserve_sig: ReserveSignatureP.t;
     coin_contribution: Amount.t;
@@ -1125,7 +1125,7 @@ module PurseDepositSignaturePS2 = struct
 end
 
 module PurseDepositConfirmedSignature = struct
-  (* purpose.purpose = TALER_SIGNATURE_PURSE_DEPOSIT_CONFIRMED *)
+  (* purpose = TALER_SIGNATURE_PURSE_DEPOSIT_CONFIRMED *)
   type t = {
     total_purse_amount: Amount.t;
     total_deposit_fees: Amount.t;
@@ -1136,7 +1136,7 @@ module PurseDepositConfirmedSignature = struct
 end
 
 module PurseMergeSignature = struct
-  (* purpose.purpose = TALER_SIGNATURE_WALLET_PURSE_MERGE *)
+  (* purpose = TALER_SIGNATURE_WALLET_PURSE_MERGE *)
   type t = {
     merge_timestamp: Timestamp.t;
     h_wire: NormalizedPaytoHash.t;
@@ -1144,7 +1144,7 @@ module PurseMergeSignature = struct
 end
 
 module AccountMergeSignature = struct
-  (* purpose.purpose = TALER_SIGNATURE_WALLET_ACCOUNT_MERGE *)
+  (* purpose = TALER_SIGNATURE_WALLET_ACCOUNT_MERGE *)
   type t = {
     reserve_pub: ReservePublicKeyP.t;
     purse_pub: PursePublicKey.t;
@@ -1157,12 +1157,12 @@ module AccountMergeSignature = struct
 end
 
 module AccountSetupRequestSignature = struct
-  (* purpose.purpose = TALER_SIGNATURE_WALLET_ACCOUNT_SETUP *)
+  (* purpose = TALER_SIGNATURE_WALLET_ACCOUNT_SETUP *)
   type t = { threshold: Amount.t }
 end
 
 module PurseMergeSuccessSignature = struct
-  (* purpose.purpose = TALER_SIGNATURE_PURSE_MERGE_SUCCESS *)
+  (* purpose = TALER_SIGNATURE_PURSE_MERGE_SUCCESS *)
   type t = {
     reserve_pub: ReservePublicKeyP.t;
     purse_pub: PursePublicKey.t;
@@ -1175,7 +1175,7 @@ module PurseMergeSuccessSignature = struct
 end
 
 module WadDataSignature = struct
-  (* purpose.purpose = TALER_SIGNATURE_WAD_DATA *)
+  (* purpose = TALER_SIGNATURE_WAD_DATA *)
   type t = {
     wad_execution_time: Timestamp.t;
     total_amount: Amount.t;
@@ -1185,7 +1185,7 @@ module WadDataSignature = struct
 end
 
 module P2PFees = struct
-  (* purpose.purpose = TALER_SIGNATURE_P2P_FEES *)
+  (* purpose = TALER_SIGNATURE_P2P_FEES *)
   type t = {
     start_date: Timestamp.t;
     end_date: Timestamp.t;
@@ -1200,7 +1200,7 @@ module P2PFees = struct
 end
 
 module CoinPurseRefundConfirmation = struct
-  (* purpose.purpose = TALER_SIGNATURE_EXCHANGE_CONFIRM_PURSE_REFUND *)
+  (* purpose = TALER_SIGNATURE_EXCHANGE_CONFIRM_PURSE_REFUND *)
   type t = {
     purse_pub: PursePublicKey.t;
     coin_pub: CoinSpendPublicKeyP.t;
@@ -1210,7 +1210,7 @@ module CoinPurseRefundConfirmation = struct
 end
 
 module AmlDecision = struct
-  (* purpose.purpose = TALER_SIGNATURE_AML_DECISION *)
+  (* purpose = TALER_SIGNATURE_AML_DECISION *)
   type t = {
     h_justification: Hash.Cstring.H64.t;
     decision_time: Timestamp.t;
@@ -1222,7 +1222,7 @@ module AmlDecision = struct
 end
 
 module ReserveOpen = struct
-  (* purpose.purpose = TALER_SIGNATURE_WALLET_RESERVE_OPEN *)
+  (* purpose = TALER_SIGNATURE_WALLET_RESERVE_OPEN *)
   type t = {
     reserve_payment: Amount.t;
     request_timestamp: Timestamp.t;
@@ -1232,7 +1232,7 @@ module ReserveOpen = struct
 end
 
 module ReserveClose = struct
-  (* purpose.purpose = TALER_SIGNATURE_WALLET_RESERVE_CLOSE *)
+  (* purpose = TALER_SIGNATURE_WALLET_RESERVE_CLOSE *)
   type t = {
     request_timestamp: Timestamp.t;
     target_account_h_payto: FullPaytoHash.t;
@@ -1240,7 +1240,7 @@ module ReserveClose = struct
 end
 
 module ReserveAttestRequest = struct
-  (* purpose.purpose = TALER_SIGNATURE_WALLET_ATTEST_REQUEST *)
+  (* purpose = TALER_SIGNATURE_WALLET_ATTEST_REQUEST *)
   type t = {
     request_timestamp: Timestamp.t;
     h_details: Hash.Cstring.H64.t;
@@ -1248,7 +1248,7 @@ module ReserveAttestRequest = struct
 end
 
 module ExchangeAttest = struct
-  (* purpose.purpose = TALER_SIGNATURE_EXCHANGE_RESERVE_ATTEST_DETAILS *)
+  (* purpose = TALER_SIGNATURE_EXCHANGE_RESERVE_ATTEST_DETAILS *)
   type t = {
     attest_timestamp: Timestamp.t;
     expiration_time: Timestamp.t;