Fix inconsistent rate order

projects/subgraph-basin/schema.graphql

@@ -118,7 +118,7 @@ type Well @entity {
   " The sum of all active and non-active liquidity in USD for this well. "
   totalLiquidityUSD: BigDecimal!
 
-  " The current price of each token in terms of the other token. "
+  " The current amount of each token needed to exchange for one of the other token. "
   tokenPrice: [BigInt!]!
 
   " Amount of each token in the well. The ordering should be the same as the well's `tokens` field. "
@@ -249,7 +249,7 @@ type WellDailySnapshot @entity {
   " The sum of all active and non-active liquidity in USD for this well. "
   totalLiquidityUSD: BigDecimal!
 
-  " The current price of each token in terms of the other token. "
+  " The current amount of each token needed to exchange for one of the other token. "
   tokenPrice: [BigInt!]!
 
   " All trade volume occurred for a specific token, in native amount. Volume for an individual token is defined as a purchase of that token. This includes any net trading activity as a result of add/remove liquidity. The ordering should be the same as the well's `tokens` field. "
@@ -345,7 +345,7 @@ type WellHourlySnapshot @entity {
   " The sum of all active and non-active liquidity in USD for this well. "
   totalLiquidityUSD: BigDecimal!
 
-  " The current price of each token in terms of the other token. "
+  " The current amount of each token needed to exchange for one of the other token. "
   tokenPrice: [BigInt!]!
 
   " All trade volume occurred for a specific token, in native amount. Volume for an individual token is defined as a purchase of that token. This includes any net trading activity as a result of add/remove liquidity. The ordering should be the same as the well's `tokens` field. "
@@ -476,7 +476,7 @@ type Deposit @entity(immutable: true) {
   " USD-normalized value of the transaction of the underlying (e.g. sum of tokens deposited into a well) "
   amountUSD: BigDecimal!
 
-  " The price of each token in terms of the other token, after this event. "
+  " The current amount of each token needed to exchange for one of the other token, after this event. "
   tokenPrice: [BigInt!]!
 
   " Block number of this event "
@@ -530,7 +530,7 @@ type Withdraw @entity(immutable: true) {
   " USD-normalized value of the transaction of the underlying (e.g. sum of tokens withdrawn from a well) "
   amountUSD: BigDecimal!
 
-  " The price of each token in terms of the other token, after this event. "
+  " The current amount of each token needed to exchange for one of the other token, after this event. "
   tokenPrice: [BigInt!]!
 
   " Block number of this event "
@@ -583,7 +583,7 @@ type Swap @entity(immutable: true) {
   " Amount of the token withdrawn from the well in native units "
   amountOut: BigInt!
 
-  " The price of each token in terms of the other token, after this event. "
+  " The current amount of each token needed to exchange for one of the other token, after this event. "
   tokenPrice: [BigInt!]!
 
   " Block number of this event "

projects/subgraph-basin/src/utils/Well.ts

@@ -48,6 +48,7 @@ export function updateWellTokenUSDPrices(wellAddress: Address, blockNumber: BigI
   well.save();
 }
 
+// Value at index i is how much of token i is received in exchange for one of token 1 - i.
 export function getTokenPrices(well: Well): BigInt[] {
   const wellFn = well.wellFunction.load()[0];
   const wellFnAddress = toAddress(wellFn.target);

projects/subgraph-basin/src/utils/legacy/CP2.ts

@@ -8,8 +8,8 @@ export function calcRates(reserves: BigInt[], tokenDecimals: u32[]): BigInt[] {
   }
 
   return [
-    reserves[1].times(BI_10.pow(<u8>tokenDecimals[0])).div(reserves[0]),
-    reserves[0].times(BI_10.pow(<u8>tokenDecimals[1])).div(reserves[1])
+    reserves[0].times(BI_10.pow(<u8>tokenDecimals[1])).div(reserves[1]),
+    reserves[1].times(BI_10.pow(<u8>tokenDecimals[0])).div(reserves[0])
   ];
 }
 
@@ -35,7 +35,7 @@ export function calcRates(reserves: BigInt[], tokenDecimals: u32[]): BigInt[] {
  * @param addedReserves - the net change in reserves after the liquidity event
  * @returns a list of tokens and the amount bought of each. the purchased token is positive, the sold token negative.
  */
-export function calcLiquidityVolume_deprecated(currentReserves: BigInt[], addedReserves: BigInt[]): BigInt[] {
+export function deprecated_calcLiquidityVolume(currentReserves: BigInt[], addedReserves: BigInt[]): BigInt[] {
   // Reserves prior to adding liquidity
   const initialReserves = deltaBigIntArray(currentReserves, addedReserves);
   const initialCp = initialReserves[0].times(initialReserves[1]);