cleanup some pair files

src/pair.ts

@@ -63,61 +63,3 @@ export abstract class Pair {
 	public abstract snapshot(): Snapshot;
 	public abstract restore(snapshot: Snapshot): void;
 }
-
-interface PairXYeqKSnapshot extends Snapshot {
-	fee: BigNumberString
-	bucketA: BigNumberString
-	bucketB: BigNumberString
-}
-
-export abstract class PairXYeqK extends Pair {
-	private fee: BigNumber = new BigNumber(0)
-	private bucketA: BigNumber = new BigNumber(0)
-	private bucketB: BigNumber = new BigNumber(0)
-
-	public refreshBuckets(fee: BigNumber, bucketA: BigNumber, bucketB: BigNumber) {
-		this.fee = fee
-		this.bucketA = bucketA
-		this.bucketB = bucketB
-	}
-
-	public outputAmount(inputToken: Address, inputAmount: BigNumber): BigNumber {
-		const buckets =
-			inputToken === this.tokenA ? [this.bucketA, this.bucketB] :
-			inputToken === this.tokenB ? [this.bucketB, this.bucketA] : null
-		if (buckets === null) {
-			throw new Error(`unsupported input: ${inputToken}, pair: ${this.tokenA}/${this.tokenB}!`)
-		}
-		if (this.bucketA.lt(1) || this.bucketB.lt(1)) {
-			return new BigNumber(0)
-		}
-		const amountWithFee = inputAmount.multipliedBy(this.fee)
-		const outputAmount = buckets[1].multipliedBy(amountWithFee).idiv(buckets[0].plus(amountWithFee))
-		return !outputAmount.isNaN() ? outputAmount : new BigNumber(0)
-	}
-
-	public inputAmount(outputToken: Address, outputAmount: BigNumber): BigNumber {
-		const buckets =
-			outputToken === this.tokenB ? [this.bucketA, this.bucketB] :
-			outputToken === this.tokenA ? [this.bucketB, this.bucketA] : null
-		if (buckets === null) {
-			throw new Error(`unsupported output: ${outputToken}, pair: ${this.tokenA}/${this.tokenB}!`)
-		}
-		return buckets[0].multipliedBy(outputAmount).idiv(
-			buckets[1].minus(outputAmount).multipliedBy(this.fee))
-	}
-
-	public snapshot(): PairXYeqKSnapshot {
-		return {
-			fee: this.fee.toFixed(),
-			bucketA: this.bucketA.toFixed(),
-			bucketB: this.bucketB.toFixed(),
-		}
-	}
-
-	public restore(snapshot: PairXYeqKSnapshot): void {
-		this.fee = new BigNumber(snapshot.fee)
-		this.bucketA = new BigNumber(snapshot.bucketA)
-		this.bucketB = new BigNumber(snapshot.bucketB)
-	}
-}

src/pairs/mento.ts

@@ -3,11 +3,11 @@ import { ExchangeWrapper } from "@celo/contractkit/lib/wrappers/Exchange"
 import BigNumber from "bignumber.js"
 import Web3 from "web3"
 
-import { PairXYeqK } from "../pair"
 import { address as pairMentoAddress } from "../../tools/deployed/mainnet.PairMento.addr.json"
 import { ReserveWrapper } from "@celo/contractkit/lib/wrappers/Reserve"
 import { SortedOraclesWrapper } from "@celo/contractkit/lib/wrappers/SortedOracles"
 import { selectAddress } from "../utils"
+import { PairXYeqK } from "./pair-xyeqk"
 
 export class PairMento extends PairXYeqK {
 	allowRepeats = false

src/pairs/concentrated-liquidity/pair-concentrated-liquidity.ts → src/pairs/pair-concentrated-liquidity.ts

@@ -1,13 +1,11 @@
-import { Address, BigNumberString, Pair, Snapshot } from "../../pair";
+import { Address, BigNumberString, Pair, Snapshot } from "../pair";
 
-import { TickMath } from "../../utils/concentrated-liquidity/tickMath";
-import { SwapMath, UniV3FeeAmount } from "../../utils/concentrated-liquidity/swapMath";
-import { LiquidityMath } from "../../utils/concentrated-liquidity/liquidityMath";
+import { TickMath } from "../utils/concentrated-liquidity/tickMath";
+import { SwapMath, UniV3FeeAmount } from "../utils/concentrated-liquidity/swapMath";
+import { LiquidityMath } from "../utils/concentrated-liquidity/liquidityMath";
 
-import { NEGATIVE_ONE, ONE, ZERO } from "../../constants";
-import { JSBI_BN } from "../../utils/JSBI_BN";
+import { ONE, ZERO } from "../constants";
 import BigNumber from "bignumber.js";
-import { SwappaMathError } from "../../errors";
 
 export interface SpotTicksPayload {
   sqrtPriceX96: string;
@@ -232,32 +230,26 @@ export abstract class PairContentratedLiquidity extends Pair {
         state.amountSpecifiedRemaining - (step.amountIn + step.feeAmount);
       state.amountCalculated = state.amountCalculated + step.amountOut;
 
-      if (JSBI_BN.equal(state.sqrtPriceX96, step.sqrtPriceNextX96 ?? 0)) {
+      if (state.sqrtPriceX96 === step.sqrtPriceNextX96!) {
         // if the tick is initialized, run the tick transition
         if (step.initialized) {
-          let liquidityNet = BigInt(
-            this.ticks[step.tickIndexNext].liquidityNet
-          );
+          let liquidityNet = this.ticks[step.tickIndexNext].liquidityNet
 
           // if we're moving leftward, we interpret liquidityNet as the opposite sign
           // safe because liquidityNet cannot be type(int128).min
-          if (zeroForOne)
-            liquidityNet = JSBI_BN.multiply(liquidityNet, NEGATIVE_ONE);
+          if (zeroForOne) {
+            liquidityNet = -liquidityNet
+          }
 
           state.liquidity = LiquidityMath.addDelta(
-            state.liquidity ?? BigInt(0),
+            state.liquidity!,
             liquidityNet
           );
         }
 
         state.tick = zeroForOne ? step.tickNext - 1 : step.tickNext;
         state.tickIndex = this.tickToIndex[step.tickNext];
-      } else if (
-        JSBI_BN.notEqual(
-          state.sqrtPriceX96,
-          step.sqrtPriceStartX96 ?? BigInt(0)
-        )
-      ) {
+      } else if (state.sqrtPriceX96 !== step.sqrtPriceStartX96!) {
         // updated comparison function
         // recompute unless we're on a lower tick boundary (i.e. already transitioned ticks), and haven't moved
         state.tick = TickMath.getTickAtSqrtRatio(state.sqrtPriceX96);

src/pairs/pair-xyeqk.ts

@@ -0,0 +1,60 @@
+import BigNumber from "bignumber.js"
+import { Address, BigNumberString, Pair, Snapshot } from "../pair"
+
+interface PairXYeqKSnapshot extends Snapshot {
+	fee: BigNumberString
+	bucketA: BigNumberString
+	bucketB: BigNumberString
+}
+
+export abstract class PairXYeqK extends Pair {
+	private fee: BigNumber = new BigNumber(0)
+	private bucketA: BigNumber = new BigNumber(0)
+	private bucketB: BigNumber = new BigNumber(0)
+
+	public refreshBuckets(fee: BigNumber, bucketA: BigNumber, bucketB: BigNumber) {
+		this.fee = fee
+		this.bucketA = bucketA
+		this.bucketB = bucketB
+	}
+
+	public outputAmount(inputToken: Address, inputAmount: BigNumber): BigNumber {
+		const buckets =
+			inputToken === this.tokenA ? [this.bucketA, this.bucketB] :
+			inputToken === this.tokenB ? [this.bucketB, this.bucketA] : null
+		if (buckets === null) {
+			throw new Error(`unsupported input: ${inputToken}, pair: ${this.tokenA}/${this.tokenB}!`)
+		}
+		if (this.bucketA.lt(1) || this.bucketB.lt(1)) {
+			return new BigNumber(0)
+		}
+		const amountWithFee = inputAmount.multipliedBy(this.fee)
+		const outputAmount = buckets[1].multipliedBy(amountWithFee).idiv(buckets[0].plus(amountWithFee))
+		return !outputAmount.isNaN() ? outputAmount : new BigNumber(0)
+	}
+
+	public inputAmount(outputToken: Address, outputAmount: BigNumber): BigNumber {
+		const buckets =
+			outputToken === this.tokenB ? [this.bucketA, this.bucketB] :
+			outputToken === this.tokenA ? [this.bucketB, this.bucketA] : null
+		if (buckets === null) {
+			throw new Error(`unsupported output: ${outputToken}, pair: ${this.tokenA}/${this.tokenB}!`)
+		}
+		return buckets[0].multipliedBy(outputAmount).idiv(
+			buckets[1].minus(outputAmount).multipliedBy(this.fee))
+	}
+
+	public snapshot(): PairXYeqKSnapshot {
+		return {
+			fee: this.fee.toFixed(),
+			bucketA: this.bucketA.toFixed(),
+			bucketB: this.bucketB.toFixed(),
+		}
+	}
+
+	public restore(snapshot: PairXYeqKSnapshot): void {
+		this.fee = new BigNumber(snapshot.fee)
+		this.bucketA = new BigNumber(snapshot.bucketA)
+		this.bucketB = new BigNumber(snapshot.bucketB)
+	}
+}

src/pairs/uniswapv2.ts

@@ -2,9 +2,10 @@ import Web3 from "web3"
 import BigNumber from "bignumber.js"
 
 import { IUniswapV2Pair, ABI as PairABI } from "../../types/web3-v1-contracts/IUniswapV2Pair"
-import { Address, PairXYeqK } from "../pair"
+import { Address } from "../pair"
 import { address as pairUniswapV2Address } from "../../tools/deployed/mainnet.PairUniswapV2.addr.json"
 import { selectAddress } from "../utils"
+import { PairXYeqK } from "./pair-xyeqk"
 
 export class PairUniswapV2 extends PairXYeqK {
 	allowRepeats = false

src/pairs/uniswapv3.ts

@@ -9,7 +9,7 @@ import {
   IUniswapV3Pool,
   ABI as V3PoolABI,
 } from "../../types/web3-v1-contracts/IUniswapV3Pool";
-import { PairContentratedLiquidity } from "./concentrated-liquidity/pair-concentrated-liquidity";
+import { PairContentratedLiquidity } from "./pair-concentrated-liquidity";
 import { UniV3FeeAmount } from "../utils/concentrated-liquidity/swapMath";
 import { selectAddress } from "../utils";
 import { address as pairUniV3Address } from "../../tools/deployed/mainnet.PairUniswapV3.addr.json";

yarn.lock

@@ -853,12 +853,12 @@
   resolved "https://registry.yarnpkg.com/@ledgerhq/logs/-/logs-5.50.0.tgz#29c6419e8379d496ab6d0426eadf3c4d100cd186"
   integrity sha512-swKHYCOZUGyVt4ge0u8a7AwNcA//h4nx5wIi0sruGye1IJ5Cva0GyK9L2/WdX+kWVTKp92ZiEo1df31lrWGPgA==
 
-"@mento-protocol/mento-core-ts@^0.1.0", "@mento-protocol/mento-core-ts@^0.1.1":
+"@mento-protocol/mento-core-ts@^0.1.1":
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/@mento-protocol/mento-core-ts/-/mento-core-ts-0.1.1.tgz#a775db1eadd8ccf895b9b33f5a7e490628566193"
   integrity sha512-3kQUqwi19sZlCFInROqSNqwaTDN5K3ZZ2K1W1BVuoNpTqhPEs26n5CWYQQPMZaEA8hAybQyQsGlQbGXpYNeinw==
 
-"@mento-protocol/mento-sdk@^0.1.4":
+"@mento-protocol/mento-sdk@^0.1.5":
   version "0.1.5"
   resolved "https://registry.yarnpkg.com/@mento-protocol/mento-sdk/-/mento-sdk-0.1.5.tgz#8704ada987a8f3e98601a613f81f5f9090560ab2"
   integrity sha512-YEYHNMMp0wtCE1UN+83nGYoyELfdgA2URlG+CFOtHPfPS8yc/zAgnNkCI4R7ehRnX1RDRQgf9s/w0kGKsi7M9w==