Minswap v2 swap direction

IndigoProtocol · Jul 25, 2024 · fcd3441 · fcd3441
1 parent c3f2eaa
commit fcd3441
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Showing 3 changed files with 9 additions and 1 deletion.
diff --git a/src/constants.ts b/src/constants.ts
@@ -28,6 +28,7 @@ export enum DatumParameterKey {
     MinReceive = 'MinReceive',
     Expiration = 'Expiration',
     AllowPartialFill = 'AllowPartialFill',
+    Direction = 'Direction',
 
     /**
      * Trading fees.

diff --git a/src/dex/definitions/minswap-v2/order.ts b/src/dex/definitions/minswap-v2/order.ts
@@ -99,7 +99,7 @@ export default {
       constructor: 0,
       fields: [
         {
-          constructor: 0,
+          constructor: DatumParameterKey.Direction,
           fields: []
         },
         {

diff --git a/src/dex/minswap-v2.ts b/src/dex/minswap-v2.ts
@@ -187,11 +187,18 @@ export class MinswapV2 extends BaseDex {
             return Promise.reject('Parameters for datum are not set.');
         }
 
+        const swapInToken: string = (swapParameters.SwapInTokenPolicyId as string) + (swapParameters.SwapInTokenAssetName as string);
+        const swapOutToken: string = (swapParameters.SwapOutTokenPolicyId as string) + (swapParameters.SwapOutTokenAssetName as string);
+        const swapDirection: number = [swapInToken, swapOutToken].sort((a: string, b: string) => {
+            return a.localeCompare(b);
+        })[0] === swapInToken ? 1 : 0;
+
         swapParameters = {
             ...swapParameters,
             [DatumParameterKey.BatcherFee]: batcherFee.value,
             [DatumParameterKey.LpTokenPolicyId]: liquidityPool.lpToken.policyId,
             [DatumParameterKey.LpTokenAssetName]: liquidityPool.lpToken.nameHex,
+            [DatumParameterKey.Direction]: swapDirection,
         };
 
         const datumBuilder: DefinitionBuilder = new DefinitionBuilder();