v2-events

schema.graphql

@@ -6,8 +6,6 @@ type Token @entity {
   id: ID! # token address, lowercased
   decimals: BigInt!
 
-  totalLiquidity: BigDecimal!
-
   pairsAsToken0: [Pair!]! @derivedFrom(field: "token0")
   pairsAsToken1: [Pair!]! @derivedFrom(field: "token1")
   mintsAsToken0: [Mint!]! @derivedFrom(field: "token0")
@@ -25,15 +23,12 @@ type Pair @entity {
   createdAtTimestamp: BigInt!
   createdAtBlockNumber: BigInt!
 
-  reserve0: BigDecimal!
-  reserve1: BigDecimal!
-
   mints: [Mint!]! @derivedFrom(field: "pair")
   burns: [Burn!]! @derivedFrom(field: "pair")
   swaps: [Swap!]! @derivedFrom(field: "pair")
 }
 
-type Mint @entity {
+type Mint @entity(immutable: true) {
   id: ID! # transactionhash#logIndex
   timestamp: BigInt!
   blockNumber: BigInt!
@@ -46,7 +41,7 @@ type Mint @entity {
   amount1: BigDecimal!
 }
 
-type Burn @entity {
+type Burn @entity(immutable: true) {
   id: ID! # transactionhash#logIndex
   timestamp: BigInt!
   blockNumber: BigInt!
@@ -59,7 +54,7 @@ type Burn @entity {
   to: Bytes!
 }
 
-type Swap @entity {
+type Swap @entity(immutable: true) {
   id: ID! # transactionhash#logIndex
   timestamp: BigInt!
   blockNumber: BigInt!
@@ -73,3 +68,15 @@ type Swap @entity {
   amount1Out: BigDecimal!
   to: Bytes!
 }
+
+type Transfer @entity(immutable: true) {
+  id: ID! # transactionhash#logIndex
+  timestamp: BigInt!
+  blockNumber: BigInt!
+  pair: Pair!
+  token0: Token!
+  token1: Token!
+  from: Bytes!
+  to: Bytes!
+  value: BigInt!
+}

src/mappings/factory.ts

@@ -24,7 +24,6 @@ export function handleNewPair(event: PairCreated): void {
 
     const token0 = new Token(event.params.token0.toHexString())
     token0.decimals = decimals
-    token0.totalLiquidity = ZERO_BD
     token0.save()
   }
 
@@ -40,7 +39,6 @@ export function handleNewPair(event: PairCreated): void {
 
     const token1 = new Token(event.params.token1.toHexString())
     token1.decimals = decimals
-    token1.totalLiquidity = ZERO_BD
     token1.save()
   }
 
@@ -49,8 +47,6 @@ export function handleNewPair(event: PairCreated): void {
   pair.token1 = event.params.token1.toHexString()
   pair.createdAtTimestamp = event.block.timestamp
   pair.createdAtBlockNumber = event.block.number
-  pair.reserve0 = ZERO_BD
-  pair.reserve1 = ZERO_BD
   pair.save()
 
   PairTemplate.create(event.params.pair)

src/mappings/pair.ts

@@ -1,10 +1,38 @@
 import { BigDecimal } from '@graphprotocol/graph-ts'
 import { log } from '@graphprotocol/graph-ts'
 
-import { Burn as BurnEntity, Mint as MintEntity, Pair, Swap as SwapEntity, Token } from '../types/schema'
-import { Burn, Mint, Swap, Sync } from '../types/templates/Pair/Pair'
+import {
+  Burn as BurnEntity,
+  Mint as MintEntity,
+  Pair,
+  Swap as SwapEntity,
+  Token,
+  Transfer as TransferEntity,
+} from '../types/schema'
+import { Burn, Mint, Swap, Transfer } from '../types/templates/Pair/Pair'
 import { convertTokenToDecimal } from './helpers'
 
+export function handleTransfer(event: Transfer): void {
+  const block = event.block
+  const transaction = event.transaction
+  const transferId = transaction.hash.toHex() + '#' + event.logIndex.toString()
+
+  const pair = Pair.load(event.address.toHex())!
+  const token0 = Token.load(pair.token0)!
+  const token1 = Token.load(pair.token1)!
+
+  const transfer = new TransferEntity(transferId)
+  transfer.timestamp = block.timestamp
+  transfer.blockNumber = block.number
+  transfer.pair = pair.id
+  transfer.token0 = token0.id
+  transfer.token1 = token1.id
+  transfer.from = event.params.from
+  transfer.to = event.params.to
+  transfer.value = event.params.value
+  transfer.save()
+}
+
 export function handleMint(event: Mint): void {
   const block = event.block
   const transaction = event.transaction
@@ -90,24 +118,3 @@ export function handleSwap(event: Swap): void {
   swap.to = event.params.to
   swap.save()
 }
-
-export function handleSync(event: Sync): void {
-  const pair = Pair.load(event.address.toHex())!
-  const token0 = Token.load(pair.token0)!
-  const token1 = Token.load(pair.token1)!
-
-  const reserve0 = convertTokenToDecimal(event.params.reserve0, token0.decimals)
-  const reserve1 = convertTokenToDecimal(event.params.reserve1, token1.decimals)
-
-  const oldReserve0 = pair.reserve0
-  const oldReserve1 = pair.reserve1
-
-  pair.reserve0 = reserve0
-  pair.reserve1 = reserve1
-  pair.save()
-
-  token0.totalLiquidity = token0.totalLiquidity.plus(reserve0.minus(oldReserve0))
-  token1.totalLiquidity = token1.totalLiquidity.plus(reserve1.minus(oldReserve1))
-  token0.save()
-  token1.save()
-}

subgraph.yaml

@@ -54,5 +54,5 @@ templates:
           handler: handleBurn
         - event: Swap(indexed address,uint256,uint256,uint256,uint256,indexed address)
           handler: handleSwap
-        - event: Sync(uint112,uint112)
-          handler: handleSync
+        - event: Transfer(indexed address,indexed address,uint256)
+          handler: handleTransfer