Bitcoin: Distribution range for sending transactions to inbound and outbound connections

Bitcoin Transaction Distribution Algorithm and Distribution Scope

The Bitcoin transaction distribution algorithm is a complex process that involves multiple nodes, a network of peers, and advanced cryptography. The goal is to ensure the integrity and authenticity of all transactions across the network.

In this article, we will dive into the Bitcoin core code and examine specific files that contain information about the transaction distribution algorithm’s scope for incoming and outgoing connections.

Transaction Distribution Algorithm Overview

The Bitcoin transaction distribution algorithm has several key components:

• Transaction Verification

  : Check the validity of incoming transactions to ensure they match the sender’s address, time, and other metadata.

• Blockchain Update: Update the blockchain with new transactions, including those that have been verified and approved by multiple nodes.

• Consensus Algorithm: ensuring that all nodes agree on the state of the network, including the updated blockchain.

Incoming Transaction Distribution Range

The incoming transaction distribution range refers to the range within which a transaction is considered valid and can be transmitted on the network.

According to the Bitcoin Core code, the “sendTransaction” function (src/main/cryptographic/core/transactions.py) uses the following logic to determine the distribution range:

// Calculate the minimum and maximum number of blocks for incoming transactions
uint256 minBlockNum = 1000000; // Minimum number of blocks to be considered valid
uint256 maxBlockNum = 6000000; // Maximum number of blocks that can be considered valid
// Calculate the minimum block time at which a transaction is considered valid
uint256 minTime = 10 * 60; // Minimum time between transactions in seconds (10 minutes)

In this calculation, “minBlockNum” and “maxBlockNum” represent the range of block numbers within which a transaction is considered valid. Similarly, “minTime” represents the minimum time period within which a transaction can be transmitted through the network.

Outgoing Transaction Distribution Scope

The outgoing transaction distribution scope includes the calculation of the maximum number of blocks and the time it takes for the transaction to be sent through the network.

According to the Bitcoin Core code:

// Calculate the maximum number of blocks for outgoing transactions
uint256 maxBlockNum = 1000000; // Maximum number of blocks that can be considered valid
// Calculate the maximum time between transactions in seconds (10 minutes)
uint256 maxTime = 600 * 60; // Maximum time between transactions in seconds (10 minutes)

In this calculation, “maxBlockNum” and “maxTime” refer to the range of block numbers and times that a transaction can be sent across the network.

Application

The Bitcoin Core code provides valuable information about the distribution ranges of incoming and outgoing transactions. Understanding these ranges can help you better appreciate the complexity and sophistication of Bitcoin’s transaction distribution algorithm.

Please note that this information applies to the Bitcoin Core code and may not apply to other blockchain implementations or modifications.

Additional Resources

For more information on the Bitcoin transaction propagation algorithm, including implementation details and optimization techniques, we recommend that you review the following resources:

• Bitcoin Core Documentation: [

• Bitcoin Developer Conference (BTCDev): [

• Crypto Expertise in the Bitcoin Community: [Bitcoin Subreddit, r/Bitcoin](

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