Split mappings main file

Threshold Subgraph recieves events from several sources (contracts). So
a logical division of events handlers can be each contract.

To achieve this, the generic "mappings.ts" file have been splitted in
"pre-app.ts" and "staking.ts".

Also, TokenStaking entities list in subgraph manifest has been updated.

schema.graphql

@@ -35,19 +35,19 @@ type Epoch @entity {
   stakes: [EpochStake!]!
 }
 
+type EpochCounter @entity {
+  # Singleton entity, id = epoch-counter
+  id: ID!
+  count: Int!
+}
+
 type MinStakeAmount @entity {
   id: ID!
   amount: BigInt!
   updatedAt: BigInt!
   blockNumber: BigInt!
 }
 
-type EpochCounter @entity {
-  # Singleton entity, id = epoch-counter
-  id: ID!
-  count: Int!
-}
-
 interface Delegation {
   # The delegatee address
   id: ID!

src/mapping.ts

@@ -1,8 +1,4 @@
 import { crypto, ByteArray, BigInt, log } from "@graphprotocol/graph-ts"
-import {
-  OperatorBonded,
-  OperatorConfirmed,
-} from "../generated/SimplePREApplication/SimplePREApplication"
 import {
   Staked,
   ToppedUp,
@@ -275,23 +271,6 @@ export function handleDelegateVotesChanged(event: DelegateVotesChanged): void {
   daoMetric.save()
 }
 
-export function handleOperatorBonded(event: OperatorBonded): void {
-  const preOperator = new PREOperator(
-    event.params.stakingProvider.toHexString()
-  )
-  preOperator.operator = event.params.operator
-  preOperator.save()
-}
-
-export function handleOperatorConfirmed(event: OperatorConfirmed): void {
-  const preOperator = new PREOperator(
-    event.params.stakingProvider.toHexString()
-  )
-  preOperator.operator = event.params.operator
-  preOperator.confirmationTimestamp = event.block.timestamp
-  preOperator.save()
-}
-
 export function handleMinStakeAmountChanged(
   event: MinimumStakeAmountSet
 ): void {

src/pre-app.ts

@@ -0,0 +1,22 @@
+import {
+  OperatorBonded,
+  OperatorConfirmed,
+} from "../generated/SimplePREApplication/SimplePREApplication"
+import { PREOperator } from "../generated/schema"
+
+export function handleOperatorBonded(event: OperatorBonded): void {
+  const preOperator = new PREOperator(
+    event.params.stakingProvider.toHexString()
+  )
+  preOperator.operator = event.params.operator
+  preOperator.save()
+}
+
+export function handleOperatorConfirmed(event: OperatorConfirmed): void {
+  const preOperator = new PREOperator(
+    event.params.stakingProvider.toHexString()
+  )
+  preOperator.operator = event.params.operator
+  preOperator.confirmationTimestamp = event.block.timestamp
+  preOperator.save()
+}

subgraph.yaml

@@ -14,10 +14,12 @@ dataSources:
       apiVersion: 0.0.5
       language: wasm/assemblyscript
       entities:
-        - Staked
-        - ToppedUp
-        - Unstaked
-        - DelegateChanged
+        - Account
+        - StakeData
+        - EpochStake
+        - Epoch
+        - EpochCounter
+        - MinStakeAmount
       abis:
         - name: TokenStaking
           file: ./abis/TokenStaking.json
@@ -34,7 +36,7 @@ dataSources:
           handler: handleDelegateChanged
         - event: DelegateVotesChanged(indexed address,uint256,uint256)
           handler: handleDelegateVotesChanged
-      file: ./src/mapping.ts
+      file: ./src/staking.ts
   - kind: ethereum
     name: ThresholdToken
     network: mainnet
@@ -80,4 +82,4 @@ dataSources:
           handler: handleOperatorConfirmed
         - event: OperatorBonded(indexed address,indexed address,uint256)
           handler: handleOperatorBonded
-      file: ./src/mapping.ts
+      file: ./src/pre-app.ts