Table of contents:
- 1. MiCA Sustainability Disclosure
- 2. Types of Blockchain Consensus Mechanisms
- 3. Source and Methodology
1. MiCA Sustainability Disclosure
Article 66(5) of MiCAR (Regulation (EU) 2023/1114) sets out sustainability disclosure requirements that oblige Crypto-Asset Service Providers (CASPs) to provide detailed information on their environmental and climate impact. This mandate includes the obligation to disclose the main adverse effects that the consensus mechanism used has on the climate and the environment.
2. Types of Blockchain Consensus Mechanisms
2.1 Proof of Work (PoW)
A Proof of Work (PoW) consensus mechanism incentivizes miners to secure the network by propagating ledger updates in the form of blocks, which include newly submitted and verified transactions. Miners compete to solve complex cryptographic problems, and the first to succeed receives newly minted crypto-assets (block reward) in addition to transaction fees paid by users. Misconduct, such as attempting to incorporate invalid blocks or modify the ledger's history, results in wasted computational capacity and opportunity costs, establishing an economic penalty that discourages dishonest behavior.
2.2 Proof of Stake (PoS)
A Proof of Stake (PoS) consensus mechanism incentivizes validators to secure the network and validate operations by depositing their own crypto-assets as collateral. Validators are chosen to generate new blocks based on the amount of cryptocurrency they hold and are willing to 'stake,' rather than relying on computational power. If validators act with integrity, they earn income through transaction fees; however, malicious action or the proposal of erroneous blocks can lead to the partial seizure of their staked assets, resulting in a financial penalty that discourages misconduct and ensures network robustness.
2.3 Byzantine Fault Tolerance (BFT)
Byzantine Fault Tolerance (BFT) consensus mechanisms, such as Proof of Authority (PoA), Practical Byzantine Fault Tolerance (PBFT), Byzantine Agreement (BA), or similar systems, secure the network through a predefined group of trusted validators who confirm transactions and integrate blocks into the ledger. Unlike open networks where participation is permissionless (as in PoW or PoS), BFT and similar mechanisms operate with known and vetted participants, usually selected by a governing authority. The motivation for validators to maintain network integrity stems from monetary rewards or external incentives, such as institutional trust or regulatory obligations. Malicious acts, such as submitting illegitimate transactions or failing to participate in consensus, can result in penalties, expulsion from the validator set, or other repercussions, acting as both an economic and reputational deterrent to dishonesty. Validators achieve harmony by confirming transactions and proposing blocks, and the network remains secure as long as a majority of validators behave honestly.
2.4 Without a Consensus Algorithm
Tokens do not possess their own consensus mechanism; instead, they rely on the consensus mechanism of one or more underlying crypto-asset networks. Depending on the token's design, incentive systems originate from its utility, scarcity, or associated governance rights.
3. Source and Methodology
Bit2Me, in its efforts toward transparency and regulatory compliance, obtains all information for sustainability disclosure from CCRI (Crypto Carbon Ratings Institute).