fix: potentially problematic edge cases

src/mappings/curation.ts

@@ -170,9 +170,16 @@ export function handleBurned(event: Burned): void {
   let gnsID = graphNetwork.gns.toHexString()
   // Update signal
   let subgraphDeploymentID = event.params.subgraphDeploymentID.toHexString()
-  let signalID = joinID([id, subgraphDeploymentID])
 
-  let signal = Signal.load(signalID)!
+  // Assuming signal is created since it's a burn can't be done, as signals can be transferred and
+  // we currently can't track transfers. On those edge cases values will be weird here, but
+  // overall network wide should still make sense
+  let signal = createOrLoadSignal(
+    id,
+    subgraphDeploymentID,
+    (addresses.isL1 ? event.block.number : graphNetwork.currentL1BlockNumber!).toI32(),
+    event.block.timestamp.toI32(),
+  )
   let gnsSignalOldAmount = signal.signal.toBigDecimal()
 
   let isSignalBecomingInactive = !signal.signal.isZero() && event.params.signal == signal.signal
@@ -205,8 +212,10 @@ export function handleBurned(event: Burned): void {
     gnsSignalNewAmount = gnsSignal != null ? gnsSignal.signal.toBigDecimal() : zeroBD
   }
 
-  // Update curator
-  let curator = Curator.load(id)!
+  // Assuming curator is created since it's a burn can't be done, as signals can be transferred and
+  // we currently can't track transfers, thus this might be the first curation interaction of this
+  // account
+  let curator = createOrLoadCurator(event.params.curator, event.block.timestamp)
   curator.totalUnsignalledTokens = curator.totalUnsignalledTokens.plus(event.params.tokens)
   curator.totalSignal = curator.totalSignal.minus(event.params.signal.toBigDecimal())
   curator.totalSignalAverageCostBasis = curator.totalSignalAverageCostBasis.minus(diffACB)
@@ -229,7 +238,7 @@ export function handleBurned(event: Burned): void {
 
   curator.save()
 
-  // Update subgraph
+  // Deployment can be safely assumed as existing, since someone had to have signaled in order to burn
   let deployment = SubgraphDeployment.load(subgraphDeploymentID)!
   let oldSignalAmount = deployment.signalAmount
   let oldSignalledTokens = deployment.signalledTokens

src/mappings/gns.ts

@@ -274,11 +274,13 @@ export function handleSubgraphDeprecated(event: SubgraphDeprecated): void {
   graphNetwork.activeSubgraphCount = graphNetwork.activeSubgraphCount - 1
   graphNetwork.save()
 
-  let version = SubgraphVersion.load(subgraph.currentVersion!)
-  if (version != null) {
-    let deployment = SubgraphDeployment.load(version.subgraphDeployment)
+  if (subgraph.currentVersion != null) {
+    let version = SubgraphVersion.load(subgraph.currentVersion!)
+    if (version != null) {
+      let deployment = SubgraphDeployment.load(version.subgraphDeployment)
 
-    updateCurrentDeploymentLinks(deployment, null, subgraph as Subgraph, true)
+      updateCurrentDeploymentLinks(deployment, null, subgraph as Subgraph, true)
+    }
   }
 }
 
@@ -612,7 +614,7 @@ export function handleGRTWithdrawn(event: GRTWithdrawn): void {
   nameSignal.signalAverageCostBasisPerSignal = BigDecimal.fromString('0')
   nameSignal.save()
 
-  let curator = Curator.load(event.params.nameCurator.toHexString())!
+  let curator = createOrLoadCurator(event.params.nameCurator, event.block.timestamp)
   curator.totalWithdrawnTokens = curator.totalWithdrawnTokens.plus(event.params.withdrawnGRT)
   curator.save()
 }
@@ -701,11 +703,13 @@ export function handleSubgraphDeprecatedV2(event: SubgraphDeprecated1): void {
   graphNetwork.activeSubgraphCount = graphNetwork.activeSubgraphCount - 1
   graphNetwork.save()
 
-  let version = SubgraphVersion.load(subgraph.currentVersion!)
-  if (version != null) {
-    let deployment = SubgraphDeployment.load(version.subgraphDeployment)
+  if (subgraph.currentVersion != null) {
+    let version = SubgraphVersion.load(subgraph.currentVersion!)
+    if (version != null) {
+      let deployment = SubgraphDeployment.load(version.subgraphDeployment)
 
-    updateCurrentDeploymentLinks(deployment, null, subgraph as Subgraph, true)
+      updateCurrentDeploymentLinks(deployment, null, subgraph as Subgraph, true)
+    }
   }
 }
 
@@ -990,7 +994,7 @@ export function handleGRTWithdrawnV2(event: GRTWithdrawn1): void {
 
   nameSignal.save()
 
-  let curator = Curator.load(event.params.curator.toHexString())!
+  let curator = createOrLoadCurator(event.params.curator, event.block.timestamp)
   curator.totalWithdrawnTokens = curator.totalWithdrawnTokens.plus(event.params.withdrawnGRT)
   curator.save()
 }
@@ -1131,7 +1135,7 @@ export function handleSubgraphVersionUpdated(event: SubgraphVersionUpdated): voi
     // create deployment - named subgraph relationship, and update the old one
     updateCurrentDeploymentLinks(oldDeployment, deployment, subgraph as Subgraph)
     subgraphVersion.save()
-    
+
     let context = new DataSourceContext()
     context.setString('id', metadataId)
     SubgraphVersionMetadataTemplate.createWithContext(base58Hash, context)