Bitcoin Cash (BCH) sustainability report

Bitcoin Cash is present on the following networks: Bitcoin Cash.

The Bitcoin Cash blockchain network primarily utilizes a Proof of Work (PoW) consensus mechanism to achieve distributed agreement among its participating nodes. This mechanism, inherited from the original Bitcoin blockchain, fundamentally relies on computational effort to secure the network and validate transactions, albeit with a larger block size designed for increased transaction throughput. The core components of this system include nodes and miners. Nodes are computers that run the Bitcoin Cash software, responsible for validating transactions and blocks. Miners are specialized nodes that undertake the intensive computational task of creating new blocks by solving complex cryptographic puzzles. The network’s integrity is maintained through a public ledger known as the blockchain, which records all transactions in sequential blocks. Each block contains a list of validated transactions, a cryptographic hash linking it to the previous block, a timestamp, and a unique random number called a nonce. Bitcoin Cash employs the robust SHA-256 cryptographic hash function to secure the data within these blocks, converting input data into a fixed-size, seemingly random string. The consensus process begins with transactions being broadcast across the network, then collected by miners for inclusion in a new block. Before inclusion, nodes rigorously validate each transaction to ensure adherence to network rules, such as correct digital signatures and adequate funds. Miners then compete to find a nonce that, when combined with the block’s data and hashed using SHA-256, results in a hash value below a specific target. This "hash puzzle" is intentionally difficult and resource-intensive, requiring significant computational power, which is the essence of Proof of Work. The target value is dynamically adjusted to ensure a consistent block mining rate, typically around every 10 minutes. Once a miner successfully solves the puzzle, they broadcast the newly mined block to the network. Other nodes independently verify the block’s validity, checking the hash and all contained transactions. Upon successful verification, the block is appended to their copy of the blockchain, and the cycle reiterates for the next block. Network consensus dictates that the longest chain, representing the most accumulated proof of work, is the authoritative one. In scenarios where multiple valid chains (forks) emerge, the network resolves these by continuing to extend the longest chain until one definitively surpasses the others. Additionally, Smart Bitcoin Cash (SmartBCH) functions as a sidechain, incorporating a hybrid consensus model that combines compatibility with Bitcoin Cash's PoW for settlement and security, utilizing the same SHA-256 algorithm, with validator-based validation chosen through staking and operational efficiency to enhance scalability.

Bitcoin Cash is present on the following networks: Bitcoin Cash.

The Bitcoin Cash blockchain network operates on a Proof-of-Work (PoW) consensus mechanism, which incorporates specific incentive structures and fee models designed to encourage miner participation and ensure the network's long-term sustainability. The primary incentive for miners is the block reward, which consists of newly minted Bitcoin Cash for successfully discovering and adding a new block to the blockchain. Initially, this reward was 50 BCH, but it undergoes a "halving" event approximately every four years, reducing the reward by half. This halving mechanism is crucial for controlling the total supply of Bitcoin Cash, which is capped at 21 million BCH, thereby creating scarcity and potentially influencing its long-term value. Beyond block rewards, transaction fees also serve as a vital incentive for miners. Users pay these fees to have their transactions included in a block, creating a competitive fee market. During periods of high network congestion, users can offer higher fees to prioritize their transactions, leading to faster processing times. This fee market becomes increasingly significant as block rewards diminish over successive halving events, ensuring that miners continue to have an economic reason to secure the network. Regarding applicable fees, all transactions on the Bitcoin Cash network require a modest fee, denominated in BCH. This fee is dynamically determined by factors such as the transaction's data size and the prevailing network demand. These transaction fees are indispensable for the continuous operation of the network, especially as the block reward naturally decreases over time. The flexible fee structure allows users to adjust their transaction fees; for instance, during peak network usage, a user might voluntarily increase their fee to guarantee quicker confirmation of their transaction. This mechanism effectively incentivizes miners to prioritize transactions that offer higher fees, optimizing their revenue while servicing the network. For Smart Bitcoin Cash (SmartBCH), which functions as a sidechain, the incentive model shifts to rewarding validators. These validators receive a share of the transaction fees for their role in validating transactions and maintaining the network's integrity. This system fosters economic alignment, encouraging validators to act in the best interest of SmartBCH, promoting its stability and adoption. Fees on SmartBCH transactions are also paid in BCH, ensuring seamless integration and interoperability with the broader Bitcoin Cash ecosystem.

Bitcoin Cash is present on the following networks: Bitcoin Cash.

The methodology for calculating the energy consumption of the Bitcoin Cash network aggregates data across multiple contributing components, employing two primary approaches: "top-down" and "bottom-up." The "top-down" approach centers on the economic behavior of miners, who are defined as individuals or devices actively participating in the Proof-of-Work consensus mechanism. Miners are considered the main drivers of the network's energy usage. The calculation begins by pre-selecting hardware based on the SHA-256 hash algorithm, which Bitcoin Cash utilizes. A profitability threshold is then established by analyzing the revenue and cost structures associated with mining operations, ensuring that only hardware surpassing this threshold is included in the network's energy footprint. The overall energy consumption is subsequently derived by factoring in the distribution of this hardware, its operational efficiency levels, and on-chain data detailing miners' potential revenue. If merge mining, where multiple cryptocurrencies are mined simultaneously, is identified as a significant factor, its impact is also incorporated into the calculation. For comprehensive asset identification, the Functionally Fungible Group Digital Token Identifier (FFG DTI) is utilized to scope all implementations of the asset, with mappings regularly updated by the Digital Token Identifier Foundation. The underlying information regarding hardware deployed and the number of network participants relies on assumptions, which are diligently validated using empirical data, assuming participants are generally economically rational. A precautionary principle is applied, favoring conservative (higher) estimates for potential adverse impacts when uncertainty exists. Conversely, the "bottom-up" approach focuses on the network's nodes as the central elements determining energy consumption. This method's assumptions are grounded in empirical observations gathered through public information sites, open-source crawlers, and proprietary in-house crawlers. Key determinants for estimating the hardware used within the network are the specific requirements for running the client software. The energy consumption of these identified hardware devices is then quantified through measurements conducted in certified test laboratories. Similar to the top-down method, the Functionally Fungible Group Digital Token Identifier (FFG DTI) is employed to ascertain all relevant implementations of the asset, with continuous updates to the mappings from the Digital Token Identifier Foundation. Information concerning the hardware used and the count of network participants is based on empirically verified assumptions, maintaining the premise of economically rational participants. As a cautionary measure, conservative (higher) estimates for negative environmental impacts are adopted in cases of doubt.

Bitcoin Cash is present on the following networks: Bitcoin Cash.

To assess the renewable energy consumption associated with the Bitcoin Cash network, a structured methodology is employed, focusing on the geographic distribution of its operational nodes. The initial step involves determining the physical locations of these nodes, leveraging a combination of publicly available information sites, open-source crawlers, and specialized in-house crawlers. This comprehensive data collection aims to pinpoint the regional footprint of the network's infrastructure. In instances where precise geographic distribution data for the nodes is unavailable or insufficient, the methodology refers to comparable blockchain networks. These reference networks are carefully selected based on similarities in their incentivization structures and consensus mechanisms, providing a proxy for estimating geographic spread when direct data is sparse. Once the geo-information for the nodes is established, either directly or through reference networks, it is integrated with extensive public data from "Our World in Data." This integration allows for the correlation of node locations with regional energy grid compositions, particularly concerning the proportion of electricity generated from renewable sources. The aim is to derive an informed estimate of the renewable energy mix powering the network's operations. The energy intensity of the network is then calculated as the marginal energy cost relative to processing one additional transaction. This metric provides insight into the incremental energy impact of network activity. The specific data sources underpinning the determination of renewable energy proportions are provided by Ember (2025) and the Energy Institute's Statistical Review of World Energy (2024), which include significant processing by Our World in Data. This dataset, titled "Share of electricity generated by renewables – Ember and Energy Institute," is publicly accessible and retrieved from Share of electricity generated by renewables – Ember and Energy Institute. This robust approach ensures that the estimation of renewable energy usage is as accurate and verifiable as possible, relying on established data aggregation and reporting standards.

Bitcoin Cash is present on the following networks: Bitcoin Cash.

The methodologies for determining the Greenhouse Gas (GHG) emissions of the Bitcoin Cash network are rigorously structured to account for the environmental impact of its operations. The process begins by identifying the geographical locations of the network's nodes, a critical step for correlating energy consumption with regional carbon intensities. This identification is achieved through a multi-faceted approach that includes scanning public information sites, deploying open-source crawlers, and utilizing advanced in-house developed crawlers. In situations where precise location data for nodes cannot be obtained, the methodology incorporates data from reference networks. These alternative networks are chosen based on their structural similarities, particularly their incentivization models and consensus mechanisms, providing a robust proxy when direct geographical information is limited. Upon compiling the geo-information, this data is then merged with publicly available information from "Our World in Data." This integration facilitates the assessment of the carbon intensity of the electricity consumed by the nodes in their respective regions. By combining location data with regional energy mix details, an informed estimate of the network's GHG emissions can be derived. The GHG intensity is specifically calculated as the marginal emission associated with the processing of one additional transaction, providing a per-transaction environmental footprint metric. The primary data sources for this assessment are provided by Ember (2025) and the Energy Institute's Statistical Review of World Energy (2024), with substantial data processing conducted by Our World in Data. The specific dataset used is "Carbon intensity of electricity generation – Ember and Energy Institute," which is publicly available and retrieved from Carbon intensity of electricity generation – Ember and Energy Institute. This dataset is licensed under CC BY 4.0, ensuring its broad accessibility and reuse for environmental reporting. This comprehensive methodology ensures a verifiable and transparent assessment of the Bitcoin Cash network's carbon footprint.