refactor: save vToken event amounts as mantissa

VenusProtocol · Nov 2, 2023 · 80741a6 · 80741a6
1 parent ccda02b
commit 80741a6
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Showing 2 changed files with 16 additions and 45 deletions.
diff --git a/subgraphs/venus/schema.graphql b/subgraphs/venus/schema.graphql
@@ -177,7 +177,7 @@ type TransferEvent implements VTokenTransfer @entity {
     "Transaction hash concatenated with log index"
     id: ID!
     "vTokens transferred"
-    amount: BigDecimal!
+    amountMantissa: BigInt!
     "Account that received tokens"
     to: Bytes!
     "Account that sent tokens"
@@ -244,7 +244,7 @@ type LiquidationEvent implements VTokenTransfer @entity {
     "Transaction hash concatenated with log index"
     id: ID!
     "vTokens seized"
-    amount: BigDecimal!
+    amountMantissa: BigInt!
     "Liquidator receiving tokens"
     to: Bytes!
     "Account being liquidated (borrower)"
@@ -258,7 +258,7 @@ type LiquidationEvent implements VTokenTransfer @entity {
     "Symbol of the underlying asset repaid through liquidation"
     underlyingSymbol: String!
     "Underlying vToken amount that was repaid by liquidator"
-    underlyingRepayAmount: BigDecimal!
+    underlyingRepayAmountMantissa: BigInt!
 }
 
 """
@@ -269,9 +269,9 @@ interface UnderlyingTransfer {
     "Transaction hash concatenated with log index"
     id: ID!
     "Amount of underlying borrowed"
-    amount: BigDecimal!
+    amountMantissa: BigInt!
     "Total borrows of this asset the account has"
-    accountBorrows: BigDecimal!
+    accountBorrowsMantissa: BigInt!
     "Account that borrowed the tokens"
     borrower: Bytes!
     "Block number"
@@ -289,9 +289,9 @@ type BorrowEvent implements UnderlyingTransfer @entity {
     "Transaction hash concatenated with log index"
     id: ID!
     "Amount of underlying borrowed"
-    amount: BigDecimal!
+    amountMantissa: BigInt!
     "Total borrows of this asset the account has"
-    accountBorrows: BigDecimal!
+    accountBorrowsMantissa: BigInt!
     "Account that borrowed the tokens"
     borrower: Bytes!
     "Block number"
@@ -310,9 +310,9 @@ type RepayEvent implements UnderlyingTransfer @entity {
     "Transaction hash concatenated with log index"
     id: ID!
     "Amount of underlying repaid"
-    amount: BigDecimal!
+    amountMantissa: BigInt!
     "Total borrows of this asset the account has"
-    accountBorrows: BigDecimal!
+    accountBorrowsMantissa: BigInt!
     "Account that borrowed the tokens"
     borrower: Bytes!
     "Block number"

diff --git a/subgraphs/venus/src/mappings/vToken.ts b/subgraphs/venus/src/mappings/vToken.ts
@@ -162,19 +162,9 @@ export const handleBorrow = (event: Borrow): void => {
     .concat('-')
     .concat(event.transactionLogIndex.toString());
 
-  let borrowAmount = event.params.borrowAmount
-    .toBigDecimal()
-    .div(exponentToBigDecimal(market.underlyingDecimals))
-    .truncate(market.underlyingDecimals);
-
-  let accountBorrows = event.params.accountBorrows
-    .toBigDecimal()
-    .div(exponentToBigDecimal(market.underlyingDecimals))
-    .truncate(market.underlyingDecimals);
-
   let borrow = new BorrowEvent(borrowID);
-  borrow.amount = borrowAmount;
-  borrow.accountBorrows = accountBorrows;
+  borrow.amountMantissa = event.params.borrowAmount;
+  borrow.accountBorrowsMantissa = event.params.accountBorrows;
   borrow.borrower = event.params.borrower;
   borrow.blockNumber = event.block.number.toI32();
   borrow.blockTime = event.block.timestamp.toI32();
@@ -244,19 +234,9 @@ export const handleRepayBorrow = (event: RepayBorrow): void => {
     .concat('-')
     .concat(event.transactionLogIndex.toString());
 
-  let repayAmount = event.params.repayAmount
-    .toBigDecimal()
-    .div(exponentToBigDecimal(market.underlyingDecimals))
-    .truncate(market.underlyingDecimals);
-
-  let accountBorrows = event.params.accountBorrows
-    .toBigDecimal()
-    .div(exponentToBigDecimal(market.underlyingDecimals))
-    .truncate(market.underlyingDecimals);
-
   let repay = new RepayEvent(repayID);
-  repay.amount = repayAmount;
-  repay.accountBorrows = accountBorrows;
+  repay.amountMantissa = event.params.repayAmount;
+  repay.accountBorrowsMantissa = event.params.accountBorrows;
   repay.borrower = event.params.borrower;
   repay.blockNumber = event.block.number.toI32();
   repay.blockTime = event.block.timestamp.toI32();
@@ -325,24 +305,15 @@ export const handleLiquidateBorrow = (event: LiquidateBorrow): void => {
     .toHexString()
     .concat('-')
     .concat(event.transactionLogIndex.toString());
-  let vTokenDecimals = marketRepayToken.vTokenDecimals;
-  let vTokenAmount = event.params.seizeTokens
-    .toBigDecimal()
-    .div(exponentToBigDecimal(vTokenDecimals))
-    .truncate(vTokenDecimals);
-  let underlyingRepayAmount = event.params.repayAmount
-    .toBigDecimal()
-    .div(exponentToBigDecimal(marketRepayToken.underlyingDecimals))
-    .truncate(marketRepayToken.underlyingDecimals);
 
   let liquidation = new LiquidationEvent(mintID);
-  liquidation.amount = vTokenAmount;
+  liquidation.amountMantissa = event.params.seizeTokens;
   liquidation.to = event.params.liquidator;
   liquidation.from = event.params.borrower;
   liquidation.blockNumber = event.block.number.toI32();
   liquidation.blockTime = event.block.timestamp.toI32();
   liquidation.underlyingSymbol = marketRepayToken.underlyingSymbol;
-  liquidation.underlyingRepayAmount = underlyingRepayAmount;
+  liquidation.underlyingRepayAmountMantissa = event.params.repayAmount;
   liquidation.vTokenSymbol = marketVTokenLiquidated.symbol;
   liquidation.save();
 };
@@ -447,7 +418,7 @@ export const handleTransfer = (event: Transfer): void => {
   let transferId = getTransactionId(event.transaction.hash, event.transactionLogIndex);
 
   let transfer = new TransferEvent(transferId);
-  transfer.amount = event.params.amount.toBigDecimal().div(exponentToBigDecimal(vTokenDecimals));
+  transfer.amountMantissa = event.params.amount;
   transfer.to = event.params.to;
   transfer.from = event.params.from;
   transfer.blockNumber = event.block.number.toI32();