Allow custom endpoint for indexer (#3631)

Co-authored-by: app-token-issuer-data-feeds[bot] <134377064+app-token-issuer-data-feeds[bot]@users.noreply.github.com>

.changeset/fifty-insects-try.md

@@ -0,0 +1,5 @@
+---
+'@chainlink/proof-of-reserves-adapter': patch
+---
+
+Allow custom endpoint for indexer

packages/composites/proof-of-reserves/src/endpoint/reserves.ts

@@ -20,6 +20,7 @@ export type TInputParameters = {
   protocol: string
   protocolEndpoint?: string
   indexer: string
+  indexerEndpoint?: string
   confirmations?: number
   addresses?: string[]
   disableAddressValidation?: boolean
@@ -57,6 +58,10 @@ const inputParameters: InputParameters<TInputParameters> = {
       ...indexerAdaptersV3.map(({ name }) => name.toUpperCase()),
     ],
   },
+  indexerEndpoint: {
+    type: 'string',
+    description: 'Optional endpoint for the indexer external adapter to use',
+  },
   confirmations: {
     required: false,
     type: 'number',
@@ -109,6 +114,7 @@ export const execute: ExecuteWithConfig<Config> = async (input, context, config)
     confirmations,
     config,
     validatedAddresses,
+    validator.validated.data.indexerEndpoint,
   )
   const reduceOutput = await runReduceAdapter(indexer, context, balanceOutput)
   return reduceOutput

packages/composites/proof-of-reserves/src/utils/balance.ts

@@ -58,6 +58,7 @@ export const runBalanceAdapter = async (
   confirmations: number,
   config: Config,
   input: AdapterResponse,
+  indexerEndpoint?: string,
 ): Promise<AdapterResponse> => {
   const execute = makeRequestFactory(config, indexer)
   let next
@@ -117,6 +118,11 @@ export const runBalanceAdapter = async (
         },
       }
   }
+
+  if (indexerEndpoint) {
+    ;(next.data as any).endpoint = indexerEndpoint
+  }
+
   return callAdapter(execute, context, next, '_onBalance')
 }