diff --git a/src/front/pages/offers.js b/src/front/pages/offers.js
index 2c27ad3..bd6c0fe 100644
--- a/src/front/pages/offers.js
+++ b/src/front/pages/offers.js
@@ -31,15 +31,6 @@ function validateAndFormatEurAmountInput(eurAmountInput) {
   eurAmountInput.classList.add('input-is-invalid');
 }
 
-function updateBtcInput(eurInput, btcAmountInput) {
-  const eurToSatRate = 1021;
-  const cleanEurAmount = readIntFromEurAmountInput(eurInput);
-
-  const satsAmount = cleanEurAmount * eurToSatRate;
-  const formattedSatsAmount = formatNumberWithSpaces(satsAmount);
-  btcAmountInput.value = formattedSatsAmount;
-}
-
 class AmountInput {
   constructor({ parentElement, id }) {
     this.element = null;
@@ -103,17 +94,26 @@ class AmountInput {
 
     eurInput.addEventListener('blur', () => {
       validateAndFormatEurAmountInput(eurInput);
-      updateBtcInput(eurInput, btcInput);
+      this.updateBtcInput(eurInput, btcInput);
     });
 
     eurInput.addEventListener('input', () => {
       eurInput.value = eurInput.value.replace(/[^0-9]/g, '');
-      updateBtcInput(eurInput, btcInput);
+      this.updateBtcInput(eurInput, btcInput);
     });
 
     this.element = amountArea;
     this.parentElement.appendChild(this.element);
   }
+
+  updateBtcInput(eurInput, btcAmountInput) {
+    const eurToSatRate = 1021;
+    const cleanEurAmount = readIntFromEurAmountInput(eurInput);
+
+    const satsAmount = cleanEurAmount * eurToSatRate;
+    const formattedSatsAmount = formatNumberWithSpaces(satsAmount);
+    btcAmountInput.value = formattedSatsAmount;
+  }
 }
 
 function offersPage() {