fix: fix decimals problem with Chat commands

The problem was that the BigInt lib did not handle decimals at all. `divMod` only let the remainder be what is after the dot. So I created my own divde and multiply methods to move the dot depending on the number of decimals

ui/app/AppLayouts/Chat/ChatColumn/MessageComponents/TransactionBubble.qml

@@ -48,21 +48,13 @@ Item {
         if (!commandParametersObject.value) {
             return "0"
         }
-
-        // Divide the Wei value by 10^decimals
-        var divModResult = Utils.newBigNumber(commandParametersObject.value)
-        .divmod(Utils.newBigNumber(10)
-                .pow(token.decimals))
-        // Make a string with the quotient and the remainder
-        var str = divModResult.quotient.toString() + "." + divModResult.remainder.toString()
-        // Remove the useless zeros at the satrt and the end, but keep at least one before the dot
-        return str.replace(/^(0*)([0-9\.]+?)(0*)$/g, function (match, firstZeros, whatWeKeep, secondZeros) {
-            if (whatWeKeep.startsWith('.')) {
-                whatWeKeep = "0" + whatWeKeep
+        try {
+            return Utils.divideByDecimals(commandParametersObject.value, token.decimals)
+        } catch (e) {
+            console.error("Error getting the ETH value of:", commandParametersObject.value)
+            console.error("Error:", e.message)
+            return "0"
         }
-
-            return whatWeKeep
-        })
     }
     property string tokenSymbol: token.symbol
     property string fiatValue: {

ui/imports/BigNumber/LICENSE

@@ -1,24 +0,0 @@
-This is free and unencumbered software released into the public domain.
-
-Anyone is free to copy, modify, publish, use, compile, sell, or
-distribute this software, either in source code form or as a compiled
-binary, for any purpose, commercial or non-commercial, and by any
-means.
-
-In jurisdictions that recognize copyright laws, the author or authors
-of this software dedicate any and all copyright interest in the
-software to the public domain. We make this dedication for the benefit
-of the public at large and to the detriment of our heirs and
-successors. We intend this dedication to be an overt act of
-relinquishment in perpetuity of all present and future rights to this
-software under copyright law.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
-OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
-ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-OTHER DEALINGS IN THE SOFTWARE.
-
-For more information, please refer to <http://unlicense.org>

ui/imports/Utils.qml

@@ -2,12 +2,53 @@ pragma Singleton
 
 import QtQuick 2.13
 import "../shared/xss.js" as XSS
-import "./BigNumber/bignumber.js" as BigNumber
 
 QtObject {
-    function newBigNumber(number) {
-        // See here for docs: https://github.com/peterolson/BigInteger.js
-        return BigNumber.bigInt(number)
+    // Use this to multiply an amount by 10^decimals
+    function multiplyByDecimals(amount, decimals) {
+        amount = amount.toString()
+        let dotIndex = -1
+        for (let i = 0; i < decimals; i++) {
+            dotIndex = amount.indexOf('.')
+            if (dotIndex > -1) {
+                if (dotIndex === amount.length - 1) {
+                    // The dot is at the end, we can get rid of it and add a 0
+                    amount = amount.substring(0, dotIndex) + "0"
+                    continue
+                }
+                // Move the dot one space to the right
+                amount = amount.substring(0, dotIndex) + amount.substring(dotIndex + 1, dotIndex + 2) + "." + amount.substring(dotIndex + 2)
+                continue
+            }
+            // Just add a new 0
+            amount += "0"
+        }
+
+        return stripStartingZeros(amount)
+    }
+
+    // Use this to divide an amount by 10^decimals
+    function divideByDecimals(amount, decimals) {
+        amount = amount.toString()
+        let dotIndex = amount.indexOf('.')
+        if (dotIndex === -1) {
+            amount = amount + "."
+        }
+        for (let i = 0; i < decimals; i++) {
+            dotIndex = amount.indexOf('.')
+            if (dotIndex === 0) {
+                // The dot is at the start, we need to add a zero in front before moving it
+                dotIndex++
+                amount = "0" + amount
+            }
+            // Move the dot one position left
+            amount = amount.substring(0, dotIndex - 1) + "." + amount.substring(dotIndex - 1, dotIndex) + amount.substring(dotIndex + 1)
+        }
+        if (amount.startsWith(".")) {
+            amount = "0" + amount
+        }
+
+        return stripTrailingZeros(amount)
     }
 
     function isHex(value) {
@@ -91,6 +132,22 @@ QtObject {
         return strNumber.replace(/(\.[0-9]*[1-9])0+$|\.0*$/,'$1')
     }
 
+    /**
+     * Removes starting zeros from a string-representation of a number. Throws
+     * if parameter is not a string
+     */
+    function stripStartingZeros(strNumber) {
+        if (!(typeof strNumber === "string")) {
+            try {
+                strNumber = strNumber.toString()
+            } catch(e) {
+                throw "[Utils.stripStartingZeros] input parameter must be a string"
+            }
+        }
+        return strNumber.replace(/^(0*)([0-9\.]+)/, "$2")
+    }
+
+
     function setColorAlpha(color, alpha) {
         return Qt.hsla(color.hslHue, color.hslSaturation, color.hslLightness, alpha)
     }