simplify Checkable.Class annotation and allow extra fields in /keys response

src/checkable.ts

@@ -206,56 +206,28 @@ export namespace Checkable {
    * This annotation adds the implementation of the `checked`
    * static method.
    */
-  export function Class(target: any) {
+  export function Class(opts: {extra?: boolean, validate?: boolean} = {}) {
-    target.checked = (v: any) => {
+    return (target: any) => {
-      return checkValue(v, {
-        propertyKey: "(root)",
-        type: target,
-        checker: checkValue
-      }, ["(root)"]);
-    };
-    return target;
-  }
-
-  /**
-   * A checker for a class (see [[Class]) that allows
-   * extra properties to exist on the JSON object being validated.
-   */
-  export function ClassWithExtra(target: any) {
-    target.checked = (v: any) => {
-      return checkValue(v, {
-        propertyKey: "(root)",
-        type: target,
-        extraAllowed: true,
-        checker: checkValue
-      }, ["(root)"]);
-    };
-    return target;
-  }
-
-
-  /**
-   * A validator for a class that can have an additional validate
-   * method.  The validate method is a member method of type `() => void`
-   * that throws an exception on invalidation errors.
-   */
-  export function ClassWithValidator(target: any) {
       target.checked = (v: any) => {
         let cv = checkValue(v, {
           propertyKey: "(root)",
           type: target,
+          extraAllowed: !!opts.extra,
           checker: checkValue
         }, ["(root)"]);
+        if (opts.validate) {
           let instance = new target();
           if (typeof instance.validate !== "function") {
             throw Error("invalid Checkable annotion: validate method required");
           }
           // May throw exception
           instance.validate.call(cv);
+        }
         return cv;
       };
       return target;
     }
+  }
 
 
   /**

src/types.ts

@@ -28,7 +28,7 @@
  */
 import { Checkable } from "./checkable";
 
-@Checkable.Class
+@Checkable.Class()
 export class AmountJson {
   @Checkable.Number
   value: number;
@@ -106,7 +106,7 @@ export interface CurrencyRecord {
 }
 
 
-@Checkable.Class
+@Checkable.Class()
 export class CreateReserveResponse {
   /**
    * Exchange URL where the bank should create the reserve.
@@ -187,7 +187,7 @@ export class DenominationRecord {
 /**
  * Denomination as found in the /keys response from the exchange.
  */
-@Checkable.Class
+@Checkable.Class()
 export class Denomination {
   @Checkable.Value(AmountJson)
   value: AmountJson;
@@ -304,7 +304,7 @@ export interface PaybackRequest {
   coin_sig: string;
 }
 
-@Checkable.Class
+@Checkable.Class()
 export class PaybackConfirmation {
   /**
    * public key of the reserve that will receive the payback.
@@ -477,7 +477,7 @@ export interface CoinRecord {
 }
 
 
-@Checkable.Class
+@Checkable.Class()
 export class ExchangeHandle {
   @Checkable.String
   master_pub: string;
@@ -524,7 +524,7 @@ interface Merchant {
   instance?: string;
 }
 
-@Checkable.ClassWithValidator
+@Checkable.Class({validate: true})
 export class Contract {
 
   validate() {

src/wallet.ts

@@ -89,7 +89,7 @@ export interface CoinWithDenom {
  * Element of the payback list that the
  * exchange gives us in /keys.
  */
-@Checkable.Class
+@Checkable.Class()
 export class Payback {
   @Checkable.String
   h_denom_pub: string;
@@ -99,7 +99,7 @@ export class Payback {
 /**
  * Structure that the exchange gives us in /keys.
  */
-@Checkable.Class
+@Checkable.Class({extra: true})
 export class KeysJson {
   @Checkable.List(Checkable.Value(Denomination))
   denoms: Denomination[];
@@ -129,7 +129,7 @@ export class KeysJson {
 }
 
 
-@Checkable.Class
+@Checkable.Class()
 class WireFeesJson {
   @Checkable.Value(AmountJson)
   wire_fee: AmountJson;
@@ -150,7 +150,7 @@ class WireFeesJson {
 }
 
 
-@Checkable.ClassWithExtra
+@Checkable.Class({extra: true})
 class WireDetailJson {
   @Checkable.String
   type: string;
@@ -162,7 +162,7 @@ class WireDetailJson {
 }
 
 
-@Checkable.Class
+@Checkable.Class()
 export class CreateReserveRequest {
   /**
    * The initial amount for the reserve.
@@ -180,7 +180,7 @@ export class CreateReserveRequest {
 }
 
 
-@Checkable.Class
+@Checkable.Class()
 export class ConfirmReserveRequest {
   /**
    * Public key of then reserve that should be marked
@@ -193,7 +193,7 @@ export class ConfirmReserveRequest {
 }
 
 
-@Checkable.Class
+@Checkable.Class()
 export class OfferRecord {
   @Checkable.Value(Contract)
   contract: Contract;