Jan 10, 2024 3:07:14 PM

What are Confirmations in Blockchain?

Confirmations in refer to the number of blocks added to the chain after a particular transaction has been included in a block. Each confirmation decreases the risk of a transaction being reversed and is a measure of transaction finality in blockchain networks.

Role of Confirmations

  1. Ensuring Transaction Finality: Confirmations help ensure that a transaction is irreversible and has been accepted by the network.
  2. Preventing : Multiple confirmations make it increasingly difficult for a bad actor to reverse a transaction or spend the same funds twice.
  3. Increasing Security: The more confirmations a transaction has, the more secure it is considered to be.

Confirmation Process

  • First Confirmation: This occurs when a transaction is included in a block that is added to the blockchain.
  • Subsequent Confirmations: Each new block added to the chain after the first confirmation is an additional confirmation for all transactions included in previous blocks.

Confirmation Time

  • Block Time: The time it takes for a new block to be added to the blockchain affects confirmation times. For example, Bitcoin typically has a 10-minute block time.
  • Network Congestion: The level of traffic on the network can influence how quickly transactions are included in blocks and thus confirmed.

Neo Blockchain and Confirmations

  • Faster Block Time: The blockchain has a faster block time compared to Bitcoin, leading to quicker confirmations.
  • dBFT : Neo uses a delegated Byzantine Fault Tolerance (dBFT) consensus mechanism that ensures finality after one confirmation, reducing the need for multiple confirmations.

Importance of Confirmations

  • Merchant Acceptance: Merchants may require a certain number of confirmations before considering a transaction complete to avoid fraud.
  • Exchange Withdrawals: exchanges often have a confirmation requirement before allowing withdrawals.

Trade-offs with Confirmations

  • Speed vs. Security: A higher number of confirmations increases security but can also delay the finality of transactions.
  • User Experience: Users may prefer faster transactions with fewer confirmations for small amounts, accepting a lower security threshold for convenience.

Confirmations are a fundamental aspect of blockchain technology, assuring that transactions are permanent and secure within the network.