refactor(util-dev)!: rename mock minimumCost to minimumCostCoefficient

computeMinimumCost is now a function of # of inputs

Author: mkazlauskas

packages/util-dev/src/selectionConstraints.ts

@@ -3,21 +3,21 @@ import { SelectionConstraints } from '@cardano-sdk/cip2';
 
 export interface MockSelectionConstraints {
   minimumCoinQuantity: bigint;
-  minimumCost: bigint;
+  minimumCostCoefficient: bigint;
   maxTokenBundleSize: number;
   selectionLimit: number;
 }
 
 export const MOCK_NO_CONSTRAINTS: MockSelectionConstraints = {
   maxTokenBundleSize: Number.POSITIVE_INFINITY,
   minimumCoinQuantity: 0n,
-  minimumCost: 0n,
+  minimumCostCoefficient: 0n,
   selectionLimit: Number.POSITIVE_INFINITY
 };
 
 export const mockConstraintsToConstraints = (constraints: MockSelectionConstraints): SelectionConstraints => ({
   computeMinimumCoinQuantity: () => constraints.minimumCoinQuantity,
-  computeMinimumCost: async () => constraints.minimumCost,
+  computeMinimumCost: async ({ inputs }) => constraints.minimumCostCoefficient * BigInt(inputs.size),
   computeSelectionLimit: async () => constraints.selectionLimit,
   tokenBundleSizeExceedsLimit: (assets?: Cardano.TokenMap) => (assets?.size || 0) > constraints.maxTokenBundleSize
 });

packages/util-dev/test/selectionConstraints.test.ts

@@ -6,11 +6,12 @@ describe('selectionConstraints', () => {
     const constraints = mockConstraintsToConstraints({
       maxTokenBundleSize: 1,
       minimumCoinQuantity: 10n,
-      minimumCost: 20n,
+      minimumCostCoefficient: 20n,
       selectionLimit: 3
     });
     expect(constraints.computeMinimumCoinQuantity()).toBe(10n);
-    expect(await constraints.computeMinimumCost({} as any)).toBe(20n);
+    expect(await constraints.computeMinimumCost({ inputs: new Set([[]]) } as any)).toBe(20n);
+    expect(await constraints.computeMinimumCost({ inputs: new Set([[], []]) } as any)).toBe(40n);
     expect(await constraints.computeSelectionLimit({} as any)).toBe(3);
     expect(constraints.tokenBundleSizeExceedsLimit()).toBe(false);
     expect(constraints.tokenBundleSizeExceedsLimit({ size: 2 } as any)).toBe(true);