[Wallet] Understanding and Fixing the “Transaction Too Large” Issue on PEPEPOW

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Understanding and Fixing the “Transaction Too Large” Issue on PEPEPOW

The “transaction too large” error is a common issue on UTXO-based blockchains, including PEPEPOW.
This post explains why it happens and how to fix it, using tools that are already available today.

What Causes the “Transaction Too Large” Error?

PEPEPOW uses a UTXO (Unspent Transaction Output) model, similar to Bitcoin.

Over time, wallets can accumulate hundreds or thousands of small UTXOs, often caused by:

  • Mining rewards
  • Faucets
  • Frequent small transactions

When you try to send funds, the wallet may need to include too many small inputs in a single transaction.
If the total transaction size exceeds the blockchain’s data / size limit, the transaction will fail with:

“Transaction too large”

This is not a bug, and it is not unique to PEPEPOW.
All UTXO-based chains have this limitation.

The Solution: UTXO Consolidation

The fix is straightforward:

Merge many small inputs into fewer, larger inputs, then use those for future transactions.

This process is called UTXO consolidation.

Once consolidation is done, transactions will work normally again.

Available Ways to Fix the Issue

Method 1: Manual Consolidation Using Desktop Wallet (Coin Control)

This method allows you to manually select and merge small inputs.

Steps:

  1. Open the PEPEPOW desktop wallet
  2. Go to Settings > Options > Wallet
  3. Enable Coin Control
  4. Restart the wallet
  5. Click Send > Inputs
  6. Select approximately 500–600 small inputs
  7. Send them to another address you own

If you encounter a “transaction too large” error:

  • Select fewer inputs
  • Send again
  • Repeat until consolidation is complete

This will merge many small UTXOs into larger ones.

Method 2: Desktop Wallet Consolidation Tool (Recommended)

A built-in consolidation tool has been implemented in the PEPEPOW desktop wallet.

How to use it:

  1. Open the wallet
  2. Click Tools > Debug Console
  3. Enter the following command:
consolidate "your_wallet_address" 200
  • 200 is the maximum number of inputs per consolidation
  • You can run this command multiple times
  • This method consolidates wallets quickly and efficiently

 

Method 3: Non-Custodial PEPEPOW Web Wallet (Mnemonic Required)

The PEPEPOW Web Wallet now includes a UTXO Consolidation feature.

This feature:

  • Automatically combines small UTXOs
  • Prevents “transaction too large” failures
  • Improves wallet usability and transaction reliability

Important limitation
Legacy PEPEPOW addresses without a mnemonic phrase are NOT supported.

Because the Web Wallet is strictly non-custodial, private keys cannot be reconstructed for legacy addresses.

Recommendation:

  • Create a new mnemonic-backed address in the Web Wallet
  • Use it as a long-term, permanent address
  • All future Web Wallet features will work with these addresses

Summary

  • “Transaction too large” is a transaction size limitation, not a network bug
  • It occurs when too many small UTXOs are spent at once
  • UTXO consolidation fully resolves the issue
  • PEPEPOW already supports consolidation via:
    • Desktop wallet (manual Coin Control)
    • Desktop wallet consolidation tool
    • Non-custodial Web Wallet

As with all UTXO-based blockchains, wallet holders are responsible for managing their UTXOs.

Once consolidated, your wallet will be able to send transactions normally again.

 

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