Update the Game.market.calcTransactionCost formula (#277)

tiennou · web-flow · commit af9a74e8ae45 · 2025-08-05T10:30:52.000+08:00
The [engine](https://github.com/screeps/engine/blob/97c9d12385fed686655c13b09f5f2457dd83a2bf/src/utils.js#L657C9-L659C3) formula, or the [docs](https://docs.screeps.com/api/#Game.market.calcTransactionCost)
diff --git a/dist/index.d.ts b/dist/index.d.ts
@@ -3425,7 +3425,7 @@ interface Market {
      * The formula:
      *
      * ```
-     * Math.ceil( amount * (Math.log(0.1*linearDistanceBetweenRooms + 0.9) + 0.1) )
+     * Math.ceil(amount * (1 - Math.exp(-linearDistanceBetweenRooms / 30)))
      * ```
      *
      * @param amount Amount of resources to be sent.
diff --git a/src/market.ts b/src/market.ts
@@ -29,7 +29,7 @@ interface Market {
      * The formula:
      *
      * ```
-     * Math.ceil( amount * (Math.log(0.1*linearDistanceBetweenRooms + 0.9) + 0.1) )
+     * Math.ceil(amount * (1 - Math.exp(-linearDistanceBetweenRooms / 30)))
      * ```
      *
      * @param amount Amount of resources to be sent.

Original file line number	Diff line number	Diff line change
`@@ -3425,7 +3425,7 @@ interface Market {`
`3425`	`3425`	`* The formula:`
`3426`	`3426`	`*`
`3427`	`3427`	* ```
`3428`		`- * Math.ceil( amount * (Math.log(0.1*linearDistanceBetweenRooms + 0.9) + 0.1) )`
	`3428`	`+ * Math.ceil(amount * (1 - Math.exp(-linearDistanceBetweenRooms / 30)))`
`3429`	`3429`	* ```
`3430`	`3430`	`*`
`3431`	`3431`	`* @param amount Amount of resources to be sent.`
Original file line number	Diff line number	Diff line change
`@@ -29,7 +29,7 @@ interface Market {`
`29`	`29`	`* The formula:`
`30`	`30`	`*`
`31`	`31`	* ```
`32`		`- * Math.ceil( amount * (Math.log(0.1*linearDistanceBetweenRooms + 0.9) + 0.1) )`
	`32`	`+ * Math.ceil(amount * (1 - Math.exp(-linearDistanceBetweenRooms / 30)))`
`33`	`33`	* ```
`34`	`34`	`*`
`35`	`35`	`* @param amount Amount of resources to be sent.`