chore: convert-evidence-index-back-to-string

Author: tractorss

subgraph/core/schema.graphql

@@ -45,7 +45,7 @@ interface Contribution {
 interface Evidence {
   id: ID!
   evidence: String!
-  evidenceIndex: BigInt!
+  evidenceIndex: String!
   dispute: Dispute!
   sender: User!
   senderAddress: String!
@@ -330,7 +330,8 @@ type ClassicJustification @entity {
 type ClassicEvidence implements Evidence @entity(immutable: true) {
   id: ID! # classicEvidenceGroup.id-nextEvidenceIndex
   evidence: String!
-  evidenceIndex: BigInt!
+  # keeping as string to be fulltext searchable
+  evidenceIndex: String!
   dispute: Dispute!
   sender: User!
   senderAddress: String!

subgraph/core/src/EvidenceModule.ts

@@ -28,7 +28,7 @@ export function handleEvidenceEvent(event: EvidenceEvent): void {
   evidence.evidence = event.params._evidence;
   evidence.sender = userId;
   evidence.senderAddress = userId;
-  evidence.evidenceIndex = numberOfEvidences;
+  evidence.evidenceIndex = numberOfEvidences.toString();
   ensureUser(userId);
 
   let jsonObjValueAndSuccess = json.try_fromString(event.params._evidence);