CU-86a5x0q43 - BS Swap - Bug - availableTokensToUse has tokens that d…

common/changes/@cityofzion/blockchain-service/CU-86a5x0q43-3_2024-12-16-19-34.json

@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@cityofzion/blockchain-service",
+      "comment": "Add new function to format number",
+      "type": "minor"
+    }
+  ],
+  "packageName": "@cityofzion/blockchain-service"
+}

common/changes/@cityofzion/bs-swap/CU-86a5x0q43-3_2024-12-16-19-34.json

@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@cityofzion/bs-swap",
+      "comment": "Fix incorrect amount formatting",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@cityofzion/bs-swap"
+}

packages/blockchain-service/src/functions.ts

@@ -139,3 +139,29 @@ export async function fetchAccountsForBlockchainServices<BSName extends string =
 export function normalizeHash(hash: string): string {
   return hash.replace('0x', '').toLowerCase()
 }
+
+export function countDecimals(value: string | number) {
+  const [, decimals] = value.toString().split('.')
+  return decimals?.length ?? 0
+}
+
+export function formatNumber(value: string | number, decimals: number = 0) {
+  let newValue = typeof value === 'number' ? value.toFixed(decimals) : value
+
+  newValue = newValue.replace(/,|\.\.|\.,/g, '.')
+
+  if (decimals === 0) {
+    newValue = newValue.split('.')[0]
+  } else {
+    newValue = newValue.replace(/[^\d.]/g, '')
+    const countedDecimals = countDecimals(newValue)
+
+    if (countedDecimals > decimals) {
+      newValue = newValue.slice(0, newValue.length - countedDecimals + decimals)
+    }
+  }
+
+  return newValue.replace(/\s|-/g, '').replace(/^([^.]*\.)(.*)$/, function (_a, b, c) {
+    return b + c.replace(/\./g, '')
+  })
+}

packages/bs-swap/src/services/SimpleSwapService.ts

@@ -1,6 +1,7 @@
 import {
   Account,
   BlockchainService,
+  formatNumber,
   isCalculableFee,
   SwapService,
   SwapServiceEvents,
@@ -167,11 +168,11 @@ export class SimpleSwapService<BSName extends string = string> implements SwapSe
           const apiRange = await this.#api.getRange(this.#tokenToUse.value, this.#tokenToReceive.value!)
           range = {
             min: this.#tokenToUse.value.decimals
-              ? Number(apiRange.min).toFixed(this.#tokenToUse.value.decimals)
+              ? formatNumber(apiRange.min, this.#tokenToUse.value.decimals)
               : apiRange.min,
             max:
               this.#tokenToUse.value.decimals && apiRange.max
-                ? Number(apiRange.max).toFixed(this.#tokenToUse.value.decimals)
+                ? formatNumber(apiRange.max, this.#tokenToUse.value.decimals)
                 : apiRange.max,
           }
         }
@@ -181,7 +182,7 @@ export class SimpleSwapService<BSName extends string = string> implements SwapSe
         if (shouldRecalculateAmountToUse) {
           this.#amountToUse = {
             value: this.#tokenToUse.value.decimals
-              ? Number(range.min).toFixed(this.#tokenToUse.value.decimals)
+              ? formatNumber(range.min, this.#tokenToUse.value.decimals)
               : range.min,
           }
         }
@@ -243,7 +244,8 @@ export class SimpleSwapService<BSName extends string = string> implements SwapSe
 
   async setAmountToUse(amount: string | null): Promise<void> {
     this.#amountToUse = {
-      value: this.#tokenToUse.value?.decimals ? Number(amount).toFixed(this.#tokenToUse.value.decimals) : amount,
+      value:
+        this.#tokenToUse.value?.decimals && amount ? formatNumber(amount, this.#tokenToUse.value.decimals) : amount,
     }
 
     debounce(this.#recalculateValues.bind(this), 500)(['amountToReceive'])