feat: added basic service registry for Horizon

Author: juanmardefago

schema.graphql

@@ -898,6 +898,13 @@ type Provision @entity {
   delegatorShares: BigInt!
   "Exchange rate of of tokens received for each share"
   delegationExchangeRate: BigDecimal!
+
+  "Service registry URL for the indexer"
+  url: String
+  "Geohash of the indexer. Shows where their indexer is located in the world"
+  geoHash: String
+  "Address set as rewards destination for payments to the service provider"
+  rewardsDestination: Bytes
 }
 
 enum PaymentTypes {

src/mappings/subgraphService.ts

@@ -1 +1,17 @@
-// ToDo
+import { ethereum } from "@graphprotocol/graph-ts"
+import { RewardsDestinationSet, ServiceProviderRegistered } from "../types/SubgraphService/SubgraphService"
+import { createOrLoadProvision } from "./helpers/helpers"
+
+export function handleServiceProviderRegistered(event: ServiceProviderRegistered): void {
+    let decodedCalldata = ethereum.decode('(string,string,address)', event.params.data).toTuple()
+    let provision = createOrLoadProvision(event.params.serviceProvider, event.address, event.block.timestamp)
+    provision.url = decodedCalldata[0].toString()
+    provision.geoHash = decodedCalldata[1].toString()
+    provision.save()
+}
+
+export function handleRewardsDestinationSet(event: RewardsDestinationSet): void {
+    let provision = createOrLoadProvision(event.params.indexer, event.address, event.block.timestamp)
+    provision.rewardsDestination = event.params.rewardsDestination
+    provision.save()
+}