refactor(subgraph): set correct type for tree depth

Author: cedoor

apps/subgraph/schema.graphql

@@ -29,7 +29,7 @@ type ValidatedProof @entity {
     message: BigInt!
     scope: BigInt!
     merkleTreeRoot: BigInt!
-    merkleTreeDepth: BigInt!
+    merkleTreeDepth: Int!
     nullifier: BigInt!
     proof: [BigInt!]!
     group: Group!

apps/subgraph/src/semaphore.ts

@@ -217,6 +217,7 @@ export function addValidatedProof(event: ProofValidated): void {
         validatedProof.group = group.id
         validatedProof.message = event.params.message
         validatedProof.merkleTreeRoot = event.params.merkleTreeRoot
+        validatedProof.merkleTreeDepth = event.params.merkleTreeDepth.toI32()
         validatedProof.scope = event.params.scope
         validatedProof.nullifier = event.params.nullifier
         validatedProof.proof = event.params.proof

apps/subgraph/tests/semaphore.test.ts

@@ -181,6 +181,7 @@ describe("Semaphore subgraph", () => {
 
             assert.fieldEquals("ValidatedProof", id, "group", groupId.toString())
             assert.fieldEquals("ValidatedProof", id, "merkleTreeRoot", "1001")
+            assert.fieldEquals("ValidatedProof", id, "merkleTreeDepth", "32")
             assert.fieldEquals("ValidatedProof", id, "scope", "1")
             assert.fieldEquals("ValidatedProof", id, "nullifier", "666")
             assert.fieldEquals("ValidatedProof", id, "message", "2")