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2.4 Blockchain technology in optimizing vPPAs
Blockchain technology has the potential to significantly optimize VPPAs by enhancing transparency,
security, and efficiency. Using a decentralized ledger, blockchain ensures that all transactions and
contract details are immutable and tamper-proof, which fosters trust between energy producers and
corporate consumers. This technology allows for real-time tracking (combined with equipment, IoT)
of energy generation and consumption, ensuring that renewable energy claims are credible and
transparent [18], [19]. Additionally, blockchain enables the use of smart contracts, which can
automate transactions, reducing the risk of human error or fraud. The cryptographic features of
blockchain further secure the data associated with VPPAs, protecting sensitive information from
cyber threats, which is crucial given the financial and operational data involved. Moreover,
blockchain streamlines the VPPA process by reducing the need for intermediaries, leading to cost
savings and faster contract execution. The technology also supports the verification and tracking of
EACs, ensuring that the energy sold under a VPPA is genuinely renewable and not subject to double
counting. Blockchain's decentralized nature facilitates the seamless execution of VPPAs across
different countries, making it particularly advantageous for multinational corporations looking to
purchase renewable energy globally. Additionally, blockchain can support dynamic pricing models
and peer-to-peer energy trading, allowing for more flexible and decentralized energy markets. This
technological advancement ultimately contributes to the growth and adoption of renewable energy by
making VPPAs more reliable and efficient [20], [21].
2.5 Ethereum Request for Comments (ERC)
In Ethereum, standards refer to predefined rules and guidelines that ensure interoperability, security,
and functionality within the Ethereum blockchain ecosystem. These standards are critical for creating
and interacting with smart contracts, tokens, decentralized applications (dApps), and other
blockchain-based systems. The Ethereum Request for Comments (ERC) process defines these
standards, with various ERC proposals addressing different use cases [22], [23], [24], [25].
Key Ethereum Standards (ERCs):
ERC-20: This is the most well-known and widely adopted standard for creating fungible
tokens on Ethereum. Fungible tokens are identical and interchangeable with one another, like
currencies. The ERC-20 standard defines six key functions that a token smart contract must
implement, such as
transfer, balanceOf, and approve.
ERC-721: ERC-721 is a standard for non-fungible tokens (NFTs), meaning each token is
unique. This standard is widely used in applications such as digital collectibles (e.g.,
CryptoKitties) and assets that require unique ownership rights.
ERC-1155: This is a multi-token standard that allows a single smart contract to manage
both fungible and non-fungible tokens. It's more efficient than ERC-20 and ERC-721 for
applications like gaming, where both token types (e.g., in-game currencies and unique items)
are needed. ERC-1155 reduces the transaction and gas costs by enabling batch transfers of
different tokens.
ERC-1888: This is a relatively newer standard designed for EACs, a specific type of token
representing environmental commodities like renewable energy credits. ERC-1888 facilitates
the management, trade, and redemption of green energy certificates on the blockchain, making
it highly relevant for energy markets and green energy certification projects.
How ERCs Work
ERC proposals are typically initiated by developers who seek to address a specific problem
or requirement in Ethereum's ecosystem.