Ana/add totalstake-fiatvalue to Overview (#384)

* add totalstake fiat value to overview * fix amount in totalstake fiatvalue * make new code more readable * Update lib/reducers/cosmosV0-reducers.js * refactor unit conversion Co-authored-by: Mario Pino <[email protected]>
luniehq · Mar 4, 2020 · e998d2e · e998d2e
1 parent 2d3714d
commit e998d2e
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Showing 4 changed files with 47 additions and 5 deletions.
diff --git a/lib/reducers/cosmosV0-reducers.js b/lib/reducers/cosmosV0-reducers.js
@@ -298,6 +298,17 @@ function gasPriceReducer(gasPrice) {
   }
 }
 
+function toMicroUnitBalance(balance) {
+  return {
+    amount: BigNumber(balance.amount).times(1000000),
+    denom: toMicroDenom(balance.denom)
+  }
+}
+
+function toMicroDenom(denom) {
+  return `u`.concat(denom.toLowerCase())
+}
+
 // delegations rewards in Tendermint are located in events as strings with this form:
 // amount: {"15000umuon"}, or in multidenom networks they look like this:
 // amount: {"15000ungm,100000uchf,110000ueur,2000000ujpy"}
@@ -320,9 +331,11 @@ function rewardCoinReducer(reward, stakingDenom) {
 function balanceReducer(coin, gasPrices) {
   return {
     ...coin,
-    gasPrice: gasPriceReducer(
-      gasPrices.find(gasPrice => denomLookup(gasPrice.denom) === coin.denom)
-    ).price
+    gasPrice: gasPrices
+      ? gasPriceReducer(
+          gasPrices.find(gasPrice => denomLookup(gasPrice.denom) === coin.denom)
+        ).price
+      : null
   }
 }
 
@@ -356,12 +369,13 @@ function rewardReducer(reward, validator) {
   }
 }
 
-function overviewReducer(
+async function overviewReducer(
   balances,
   delegations,
   undelegations,
   rewards,
   stakingDenom,
+  fiatValueAPI,
   reducers
 ) {
   stakingDenom = denomLookup(stakingDenom)
@@ -389,6 +403,7 @@ function overviewReducer(
     (sum, { amount }) => BigNumber(sum).plus(amount),
     0
   )
+  const totalStake = liquidStake.plus(delegatedStake).plus(undelegatingStake)
 
   return {
     rewards:
@@ -400,10 +415,32 @@ function overviewReducer(
         : null,
     totalRewards: totalRewards,
     liquidStake: liquidStake,
-    totalStake: liquidStake.plus(delegatedStake).plus(undelegatingStake)
+    totalStake,
+    totalStakeFiatValue: fiatValueAPI
+      ? totalStakeFiatValueReducer(
+          fiatValueAPI,
+          totalStake,
+          stakingDenom,
+          reducers
+        )
+      : null
   }
 }
 
+async function totalStakeFiatValueReducer(
+  fiatValueAPI,
+  totalStake,
+  stakingDenom
+) {
+  return await fiatValueAPI.calculateFiatValue(
+    // we need to convert here to microunits since this is the format that calculateFiatValue is taking
+    toMicroUnitBalance({
+      amount: totalStake,
+      denom: stakingDenom
+    })
+  )
+}
+
 function getGroupByType(transactionType) {
   const transactionGroup = {
     [cosmosMessageType.SEND]: 'banking',

diff --git a/lib/schema.js b/lib/schema.js
@@ -272,6 +272,7 @@ const typeDefs = gql`
     networkId: String!
     address: String!
     totalStake: String!
+    totalStakeFiatValue: FiatValue
     liquidStake: String!
     totalRewards: String!
     rewards: [Reward]

diff --git a/lib/source/cosmosV0-source.js b/lib/source/cosmosV0-source.js
@@ -512,12 +512,14 @@ class CosmosV0API extends RESTDataSource {
       validatorsDictionary,
       delegations
     )
+    const fiatValueAPI = this.calculateFiatValue ? this : null
     return this.reducers.overviewReducer(
       balances,
       delegations,
       undelegations,
       rewards,
       stakingDenom,
+      fiatValueAPI,
       this.reducers
     )
   }

diff --git a/lib/source/emoneyV0-source.js b/lib/source/emoneyV0-source.js
@@ -68,6 +68,8 @@ class EMoneyV0API extends TerraV3API {
     return expectedReturns
   }
 
+  // This function takes microunits as inputs
+
   // Currently this function only works for e-Money and is very e-Money centered.
   // But soon will also be enabled for other similar multiple-tokens networks like Terra.