Do you have any source of step by step how to merging bitcoin addresses into one address i got read some post the 1 input can decrease the transaction fee and would like to test and hope you can give some blog post or you can share step by step merging bitcoin addresses.
You don't "merge" bitcoin addresses. That is impossible. What you do is consolidate all your "Unspent Transaction Outputs" (or UTXOs) into a single UTXO... which is a complicated way of saying "Send all your coins to an address that you own in one transaction".
A step by step for Electrum would go something like this:
Step 1. Click on "Receive" Tab
Step 2. Copy the "Receiving Address (TIP: you can click the icon at the end of the box to copy it to the clipboard)
Step 3. Click on the "Coins" Tab (TIP: if you can't see a coins tab, click "Wallet -> Coins")
Step 4. Select all the UTXOs (Click the top one, then hold SHIFT and click the bottom one). Then right click and select "Spend"
Step 5. Enter (or Paste) the Address from Step 2. into the "Pay to" box
Step 6. (Optional -
For Experts Only) To reduce fees for this transaction, set the fee to 10 sats/byte (0.0001 BTC/kB). You'll need to disable Dynamic Fees and set "Max Static Fee" to "0.0001".
Step 7. Set the fee slider as appropriate (if you did Step 6, set the slider all the way to the right so you can see the tooltip says "Fixed Rate: 0.00010000 BTC/kB")
Step 8. Click "MAX" and make sure "Replaceable" is ticked.
Step 9. Click Preview to make sure ALL your coins are included, that there is
only ONE output and that
your fee has been calculated correctly. (NOTE: If your fee is too low, you won't be able to use the accelerator.)
Step 10. Click "Sign" and enter your password as required.
Step 11. After the transaction is signed...
RECHECK the transaction size and fee to make sure your fee is still
AT LEAST 0.00010000 BTC/kB.
Step 12. If everything looks good, "Broadcast" the transaction.
Step 13. (Optional -
For Experts Only) If you set the fee manually to 10 sats/byte, go and use the
ViaBTC TX Accelerator to push your transaction or you could be waiting a while for your transaction to confirm.
NOTES/WARNINGS:- I will not be held liable if you attempt to use this method to consolidate your coins and you make a mistake and/or your coins get stuck.
- If you set the fees manually, make sure you calculate the fee correctly... otherwise your transaction and ALL your coins could get stuck for a while
- TRIPLE check the address you're sending to. You're sending ALL your coins, so you want to make sure they're going to the right place
- The ViaBTC TX Accelerator can be difficult to use as it is always busy, if you don't want to rely on it, then calculate and use "proper" fees based on network load or use Dynamic Fees and accept the cost