feat: add metadata hash + raw data to request pay service (#12)

dolcalmi · Dec 21, 2022 · 0af8243 · 0af8243
1 parent 811b595
commit 0af8243
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Showing 4 changed files with 16 additions and 4 deletions.
diff --git a/src/request-pay-service-params.ts b/src/request-pay-service-params.ts
@@ -5,6 +5,7 @@ import {
   checkedToSats,
   getJson,
   isUrl,
+  sha256,
 } from './utils'
 
 const TAG_PAY_REQUEST = 'payRequest'
@@ -45,10 +46,13 @@ const parseLnUrlPayServiceResponse = (data: {
   if (!(min && max) || min > max) return null
 
   let metadata: Array<Array<string>>
+  let metadataHash: string
   try {
     metadata = JSON.parse(data.metadata + '')
+    metadataHash = sha256(data.metadata + '', 'utf8')
   } catch {
     metadata = []
+    metadataHash = sha256('[]', 'utf8')
   }
 
   let image = ''
@@ -77,10 +81,12 @@ const parseLnUrlPayServiceResponse = (data: {
     min,
     max,
     domain: (domainMatch && domainMatch[0]) || undefined,
-    metadata: metadata,
+    metadata,
+    metadataHash,
     identifier,
     description,
     image,
     commentAllowed: Number(data.commentAllowed) || 0,
+    rawData: data,
   }
 }
diff --git a/src/types.ts b/src/types.ts
@@ -37,10 +37,12 @@ export type LnUrlPayServiceResponse = {
   max: Satoshis
   domain?: string
   metadata: Array<Array<string>>
+  metadataHash: string
   identifier: string
   description: string
   image: string
   commentAllowed: number
+  rawData: { [key: string]: string | number }
 }
 
 export type LnUrlRequestInvoiceBaseArgs = {

diff --git a/src/utils.ts b/src/utils.ts
@@ -161,9 +161,9 @@ export const getJson = async ({
   })
 }
 
-export const sha256 = (data: string) => {
+export const sha256 = (data: string, encoding: BufferEncoding = 'hex') => {
   const sha256 = new Sha256()
-  sha256.update(Buffer.from(data, 'hex'))
+  sha256.update(Buffer.from(data, encoding))
   return Buffer.from(sha256.digestSync()).toString('hex')
 }
 

diff --git a/test/helper.ts b/test/helper.ts
@@ -31,6 +31,8 @@ export const validPayServiceParams = [
         ['text/plain', 'Payment to user0'],
         ['text/identifier', '[email protected]'],
       ],
+      metadataHash:
+        'ad2c140d48fb958bc57d6d92536eedf2b21f6e3128c858cc27117b48a6d33abe',
       min: 1,
     },
   },
@@ -60,12 +62,14 @@ export const validPayServiceParams = [
       fixed: true,
       identifier: '[email protected]',
       image: '',
+      min: 10,
       max: 10,
       metadata: [
         ['text/plain', 'Payment to user11'],
         ['text/identifier', '[email protected]'],
       ],
-      min: 10,
+      metadataHash:
+        '382190a9edf28041fa43931f9f047c04252be80d6ae6483407fa3711df6d4152',
     },
   },
 ]