feat: either receiveAmount or debitAmount allowed for outgoing payment limits

bruno/collections/Rafiki/Examples/Open Payments/Grant Request Outgoing Payment.bru

@@ -21,8 +21,7 @@ body:json {
                   ],
                   "identifier": "{{senderWalletAddress}}",
                   "limits": {
-                      "debitAmount": {{quoteDebitAmount}},
-                      "receiveAmount": {{quoteReceiveAmount}}
+                      "debitAmount": {{quoteDebitAmount}}
                   }
               }
           ]

bruno/collections/Rafiki/Examples/Web Monetization/Grant Request Outgoing Payment.bru

@@ -21,8 +21,7 @@ body:json {
                   ],
                   "identifier": "{{senderWalletAddress}}",
                   "limits": {
-                      "debitAmount": {{quoteDebitAmount}},
-                      "receiveAmount": {{quoteReceiveAmount}}
+                      "debitAmount": {{quoteDebitAmount}}
                   }
               }
           ]

bruno/collections/Rafiki/Open Payments Auth APIs/Grants/Grant Request.bru

@@ -31,11 +31,6 @@ body:json {
                           "value": "8000",
                           "assetCode": "USD",
                           "assetScale": 2
-                      },
-                      "receiveAmount": {
-                          "value": "8000",
-                          "assetCode": "USD",
-                          "assetScale": 2
                       }
                   }
               }

localenv/mock-account-servicing-entity/app/routes/mock-idp._index.tsx

@@ -30,6 +30,12 @@ interface GrantAmount {
   currencyDisplayCode: string
 }
 
+export enum AmountType {
+  DEBIT = 'debit',
+  RECEIVE = 'receive',
+  UNLIMITED = 'unlimited'
+}
+
 export function loader() {
   return json({ defaultIdpSecret: CONFIG.idpSecret })
 }
@@ -45,8 +51,8 @@ function ConsentScreenBody({
 }: {
   _thirdPartyUri: string
   thirdPartyName: string
-  price: GrantAmount
-  costToUser: GrantAmount
+  price: GrantAmount | null
+  costToUser: GrantAmount | null
   interactId: string
   nonce: string
   returnUrl: string
@@ -80,6 +86,15 @@ function ConsentScreenBody({
             )}
           </div>
         </div>
+        <div className='row mt-2'>
+          <div className='col-12'>
+            {!price && !costToUser && (
+              <p>
+                {thirdPartyName} is requesting grant for an unlimited amount
+              </p>
+            )}
+          </div>
+        </div>
         <div className='row mt-2'>
           <div className='col-12'>Do you consent?</div>
         </div>
@@ -297,21 +312,29 @@ export default function ConsentScreen({ idpSecretParam }: ConsentScreenProps) {
             )
             returnUrlObject.searchParams.append(
               'currencyDisplayCode',
-              outgoingPaymentAccess && outgoingPaymentAccess.limits
-                ? outgoingPaymentAccess.limits.debitAmount.assetCode
-                : null
+              outgoingPaymentAccess?.limits?.debitAmount?.assetCode ??
+                outgoingPaymentAccess?.limits?.receiveAmount?.assetCode ??
+                null
             )
             returnUrlObject.searchParams.append(
-              'sendAmountValue',
-              outgoingPaymentAccess && outgoingPaymentAccess.limits
-                ? outgoingPaymentAccess.limits.debitAmount.value
-                : null
+              'amountValue',
+              outgoingPaymentAccess?.limits?.debitAmount?.value ??
+                outgoingPaymentAccess?.limits?.receiveAmount?.value ??
+                null
             )
             returnUrlObject.searchParams.append(
-              'sendAmountScale',
-              outgoingPaymentAccess && outgoingPaymentAccess.limits
-                ? outgoingPaymentAccess.limits.debitAmount.assetScale
-                : null
+              'amountScale',
+              outgoingPaymentAccess?.limits?.debitAmount?.assetScale ??
+                outgoingPaymentAccess?.limits?.receiveAmount?.assetScale ??
+                null
+            )
+            returnUrlObject.searchParams.append(
+              'amountType',
+              outgoingPaymentAccess?.limits?.receiveAmount
+                ? AmountType.RECEIVE
+                : outgoingPaymentAccess?.limits?.debitAmount
+                  ? AmountType.DEBIT
+                  : AmountType.UNLIMITED
             )
             setCtx({
               ...ctx,
@@ -337,33 +360,43 @@ export default function ConsentScreen({ idpSecretParam }: ConsentScreenProps) {
       ctx.errors.length === 0 &&
       ctx.ready &&
       ctx.outgoingPaymentAccess &&
-      (!ctx.price || !ctx.costToUser)
+      !ctx.price &&
+      !ctx.costToUser
     ) {
-      if (
-        ctx.outgoingPaymentAccess.limits &&
-        ctx.outgoingPaymentAccess.limits.debitAmount &&
-        ctx.outgoingPaymentAccess.limits.receiveAmount
-      ) {
-        const { receiveAmount, debitAmount } = ctx.outgoingPaymentAccess.limits
-        setCtx({
-          ...ctx,
-          price: {
-            amount:
-              Number(receiveAmount.value) /
-              Math.pow(10, receiveAmount.assetScale),
-            currencyDisplayCode: receiveAmount.assetCode
-          },
-          costToUser: {
-            amount:
-              Number(debitAmount.value) / Math.pow(10, debitAmount.assetScale),
-            currencyDisplayCode: debitAmount.assetCode
-          }
-        })
-      } else {
-        setCtx({
-          ...ctx,
-          errors: [new Error('missing or incomplete outgoing payment access')]
-        })
+      if (ctx.outgoingPaymentAccess.limits) {
+        if (
+          ctx.outgoingPaymentAccess.limits.debitAmount &&
+          ctx.outgoingPaymentAccess.limits.receiveAmount
+        ) {
+          setCtx({
+            ...ctx,
+            errors: [
+              new Error('only one of receiveAmount or debitAmount allowed')
+            ]
+          })
+        } else {
+          const { receiveAmount, debitAmount } =
+            ctx.outgoingPaymentAccess.limits
+          setCtx({
+            ...ctx,
+            ...(receiveAmount && {
+              price: {
+                amount:
+                  Number(receiveAmount.value) /
+                  Math.pow(10, receiveAmount.assetScale),
+                currencyDisplayCode: receiveAmount.assetCode
+              }
+            }),
+            ...(debitAmount && {
+              costToUser: {
+                amount:
+                  Number(debitAmount.value) /
+                  Math.pow(10, debitAmount.assetScale),
+                currencyDisplayCode: debitAmount.assetCode
+              }
+            })
+          })
+        }
       }
     }
   }, [ctx, setCtx])
@@ -379,7 +412,7 @@ export default function ConsentScreen({ idpSecretParam }: ConsentScreenProps) {
         </div>
         {ctx.ready ? (
           <>
-            {ctx.errors.length > 0 || !ctx.price || !ctx.costToUser ? (
+            {ctx.errors.length > 0 ? (
               <>
                 <h2 className='display-6'>Failed</h2>
                 <ul>

localenv/mock-account-servicing-entity/app/routes/mock-idp.consent.tsx

@@ -10,6 +10,7 @@ import { CONFIG as config } from '~/lib/parse_config.server'
 import { Button } from '~/components'
 import { CheckCircleSolid, XCircle } from '~/components/icons'
 import { InstanceConfig } from '~/lib/types'
+import { AmountType } from './mock-idp._index'
 
 export function loader() {
   return json({
@@ -24,26 +25,39 @@ function AuthorizedView({
   amount,
   interactId,
   nonce,
-  authServerDomain
+  authServerDomain,
+  amountType
 }: {
   thirdPartyName: string
   currencyDisplayCode: string
   amount: number
   interactId: string
   nonce: string
   authServerDomain: string
+  amountType: string
 }) {
+  let message = `You gave ${thirdPartyName} permission to `
+  switch (amountType) {
+    case AmountType.RECEIVE:
+      message += `receive ${currencyDisplayCode} ${amount.toFixed(2)} in your account.`
+      break
+    case AmountType.DEBIT:
+      message += `send ${currencyDisplayCode} ${amount.toFixed(2)} out of your account.`
+      break
+    case AmountType.UNLIMITED:
+      message += 'have unlimited access to your account.'
+      break
+    default:
+      message = 'Type of authorization is missing'
+  }
   return (
     <div className='bg-white rounded-md p-8 px-16'>
       <div className='row mt-2 flex flex-row items-center justify-around'>
         <div>
           <CheckCircleSolid className='w-16 h-16 text-green-400 flex-shrink-0 mr-6' />
         </div>
         <div>
-          <p>
-            You gave {thirdPartyName} permission to send {currencyDisplayCode}{' '}
-            {amount.toFixed(2)} out of your account.
-          </p>
+          <p>{message}</p>
         </div>
       </div>
       <div className='row mt-2'>
@@ -114,8 +128,9 @@ export default function Consent() {
     thirdPartyUri: queryParams.get('thirdPartyUri'),
     currencyDisplayCode: queryParams.get('currencyDisplayCode'),
     amount:
-      Number(queryParams.get('sendAmountValue')) /
-      Math.pow(10, Number(queryParams.get('sendAmountScale')))
+      Number(queryParams.get('amountValue')) /
+      Math.pow(10, Number(queryParams.get('amountScale'))),
+    amountType: queryParams.get('amountType')
   })
 
   useEffect(() => {
@@ -168,6 +183,7 @@ export default function Consent() {
           interactId={ctx.interactId}
           nonce={ctx.nonce}
           authServerDomain={authServerDomain}
+          amountType={ctx.amountType || ''}
         />
       ) : (
         <RejectedView

packages/auth/src/access/errors.ts

@@ -0,0 +1,21 @@
+import { GNAPErrorCode } from '../shared/gnapErrors'
+
+export enum AccessError {
+  OnlyOneAccessAmountAllowed = 'only one access amount allowed'
+}
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any, @typescript-eslint/explicit-module-boundary-types
+export const isAccessError = (o: any): o is AccessError =>
+  Object.values(AccessError).includes(o)
+
+export const errorToHTTPCode: {
+  [key in AccessError]: number
+} = {
+  [AccessError.OnlyOneAccessAmountAllowed]: 400
+}
+
+export const errorToGNAPCode: {
+  [key in AccessError]: GNAPErrorCode
+} = {
+  [AccessError.OnlyOneAccessAmountAllowed]: GNAPErrorCode.InvalidRequest
+}

packages/auth/src/access/service.test.ts

@@ -11,6 +11,7 @@ import { AppServices } from '../app'
 import { AccessService } from './service'
 import { Grant, GrantState, StartMethod, FinishMethod } from '../grant/model'
 import { IncomingPaymentRequest, OutgoingPaymentRequest } from './types'
+import { AccessError } from './errors'
 import { generateNonce, generateToken } from '../shared/utils'
 import { AccessType, AccessAction } from '@interledger/open-payments'
 import { Access } from './model'
@@ -75,11 +76,6 @@ describe('Access Service', (): void => {
           assetCode: 'usd',
           assetScale: 9
         },
-        receiveAmount: {
-          value: '2000000000',
-          assetCode: 'usd',
-          assetScale: 9
-        },
         expiresAt: new Date().toISOString(),
         receiver: 'https://wallet.com/alice'
       }
@@ -99,6 +95,38 @@ describe('Access Service', (): void => {
       expect(access[0].type).toEqual(AccessType.OutgoingPayment)
       expect(access[0].limits).toEqual(outgoingPaymentLimit)
     })
+
+    test('Does not create outgoing payment access when both receiveAmount and debitAmount are provided to limits', async (): Promise<void> => {
+      const outgoingPaymentLimit = {
+        debitAmount: {
+          value: '1000000000',
+          assetCode: 'usd',
+          assetScale: 9
+        },
+        receiveAmount: {
+          value: '1000000000',
+          assetCode: 'usd',
+          assetScale: 9
+        },
+        expiresAt: new Date().toISOString(),
+        receiver: 'https://wallet.com/alice'
+      }
+
+      const outgoingPaymentAccess: OutgoingPaymentRequest = {
+        type: 'outgoing-payment',
+        actions: [AccessAction.Create, AccessAction.Read, AccessAction.List],
+        limits: outgoingPaymentLimit
+      }
+
+      try {
+        await accessService.createAccess(grant.id, [outgoingPaymentAccess])
+        fail(
+          'Expected createAccess to throw OnlyOneAccessAmountAllowed, but no error was thrown'
+        )
+      } catch (err) {
+        expect(err).toBe(AccessError.OnlyOneAccessAmountAllowed)
+      }
+    })
   })
 
   describe('getByGrant', (): void => {

packages/auth/src/access/service.ts

@@ -3,6 +3,7 @@ import { Transaction, TransactionOrKnex } from 'objection'
 import { BaseService } from '../shared/baseService'
 import { Access } from './model'
 import { AccessRequest } from './types'
+import { AccessError } from './errors'
 
 export interface AccessService {
   createAccess(
@@ -47,6 +48,8 @@ async function createAccess(
   accessRequests: AccessRequest[],
   trx?: Transaction
 ): Promise<Access[]> {
+  validateLimits(accessRequests)
+
   const accessRequestsWithGrant = accessRequests.map((access) => {
     return { grantId, ...access }
   })
@@ -63,3 +66,13 @@ async function getByGrant(
     grantId
   })
 }
+
+function validateLimits(accessRequests: AccessRequest[]) {
+  const areBothLimitsSet = accessRequests.some(
+    (access) => access.limits?.debitAmount && access.limits.receiveAmount
+  )
+
+  if (areBothLimitsSet) {
+    throw AccessError.OnlyOneAccessAmountAllowed
+  }
+}