Tracking OPC fees (#593)

* Tracking OPC fees

* Updating tests

* Updating tests

* Using basetoken decimals when tracking oceanFeeAmount

* Comparing the value of oceanFeeAmount returned from the event to the value stored in the subgraph

* Tracking consumeMarketFeeAmount and marketFeeAmount

schema.graphql

@@ -257,6 +257,9 @@ type FixedRateExchangeSwap @entity {
   block: Int!
   createdTimestamp: Int!
   tx: String!
+  oceanFeeAmount: BigDecimal!
+  marketFeeAmount:  BigDecimal!
+  consumeMarketFeeAmount: BigDecimal!
 }
 
 

src/mappings/fixedRateExchange.ts

@@ -191,6 +191,20 @@ export function handleSwap(event: Swapped): void {
     BigInt.fromI32(18).toI32()
   )
 
+  // Track fees
+  swap.oceanFeeAmount = weiToDecimal(
+    event.params.oceanFeeAmount.toBigDecimal(),
+    BigInt.fromI32(baseToken.decimals).toI32()
+  )
+  swap.marketFeeAmount = weiToDecimal(
+    event.params.marketFeeAmount.toBigDecimal(),
+    BigInt.fromI32(baseToken.decimals).toI32()
+  )
+  swap.consumeMarketFeeAmount = weiToDecimal(
+    event.params.consumeMarketFeeAmount.toBigDecimal(),
+    BigInt.fromI32(baseToken.decimals).toI32()
+  )
+
   swap.save()
 
   updateFixedRateExchangeSupply(event.params.exchangeId, event.address)

test/integration/FixedRateExchange.test.ts

@@ -584,6 +584,9 @@ describe('Fixed Rate Exchange tests', async () => {
           block
           createdTimestamp
           tx
+          oceanFeeAmount
+          marketFeeAmount
+          consumeMarketFeeAmount
           __typename
         }  
       }}`
@@ -626,6 +629,17 @@ describe('Fixed Rate Exchange tests', async () => {
     const tx = (
       await fixedRate.buyDatatokens(user1, exchangeId, dtAmount, '100')
     ).events?.Swapped
+
+    const oceanFeeAmount = web3.utils.fromWei(
+      new BN(tx.returnValues.oceanFeeAmount)
+    )
+    const marketFeeAmount = web3.utils.fromWei(
+      new BN(tx.returnValues.marketFeeAmount)
+    )
+    const consumeMarketFeeAmount = web3.utils.fromWei(
+      new BN(tx.returnValues.consumeMarketFeeAmount)
+    )
+
     await sleep(sleepMs)
     user1Balance = await datatoken.balance(datatokenAddress, user1)
     // user1 has 1 datatoken
@@ -648,6 +662,12 @@ describe('Fixed Rate Exchange tests', async () => {
     assert(swaps.block === tx.blockNumber, 'incorrect value for: block')
     assert(swaps.createdTimestamp >= time, 'incorrect: createdTimestamp')
     assert(swaps.createdTimestamp < time + 25, 'incorrect: createdTimestamp 2')
+    assert(swaps.oceanFeeAmount === oceanFeeAmount, 'incorrect: oceanFeeAmount')
+    assert(swaps.marketFeeAmount === marketFeeAmount, 'wrong marketFeeAmount')
+    assert(
+      swaps.consumeMarketFeeAmount === consumeMarketFeeAmount,
+      'wrong consumeMarketFeeAmount'
+    )
     assert(swaps.tx === tx.transactionHash, 'incorrect value for: tx')
     assert(swaps.__typename === 'FixedRateExchangeSwap', 'incorrect __typename')
   })
@@ -655,6 +675,9 @@ describe('Fixed Rate Exchange tests', async () => {
     await datatoken.approve(datatokenAddress, fixedRateAddress, dtAmount, user1)
     const tx = (await fixedRate.sellDatatokens(user1, exchangeId, '10', '9'))
       .events?.Swapped
+    const oceanFeeAmount = web3.utils.fromWei(
+      new BN(tx.returnValues.oceanFeeAmount)
+    )
     assert(tx != null)
     await sleep(sleepMs)
     const swapsQuery = {
@@ -668,6 +691,7 @@ describe('Fixed Rate Exchange tests', async () => {
           block
           createdTimestamp
           tx
+          oceanFeeAmount
           __typename
         }  
       }}`
@@ -689,6 +713,7 @@ describe('Fixed Rate Exchange tests', async () => {
     assert(swaps.block === tx.blockNumber, 'incorrect value for: block')
     assert(swaps.createdTimestamp >= time, 'incorrect: createdTimestamp')
     assert(swaps.createdTimestamp < time + 25, 'incorrect: createdTimestamp 2')
+    assert(swaps.oceanFeeAmount === oceanFeeAmount, 'incorrect: oceanFeeAmount')
     assert(swaps.tx === tx.transactionHash, 'incorrect value for: tx')
     assert(swaps.__typename === 'FixedRateExchangeSwap', 'incorrect __typename')
   })