PERTANIKA JOURNAL OF SCIENCE AND TECHNOLOGY

Blockchain is an efficient method to manage and secure data, but scalability remains a limitation. The proposed work concentrates on a novel consensus algorithm, Proof of Useful Work-Authorisation-Storage Availability. The work emphasises the scalability issues and trust-related issues in blockchain-based smart contracts. The primary step in the proposed technique is to verify authorisation by the hash code of the preceding block to generate a digital signature. After information is legitimised, check whether enough storage space is available or not. Transactions are recorded to a block only after they are validated and there is enough space. A transaction is included in a block only after it is mined. To compare how efficient the proposed consensus is, in terms of energy consumption, delay, and the number of transactions it can process, the study uses Python and Solidity. The new method reduced computational energy consumption by 39% and increased transaction capacity by 17%, and decreased network delay by 49% compared to the proof of useful work algorithm. This is an indication that the efficient consensus will help us scale without compromising security and decentralisation. The contribution is beneficial in determining which nodes to apply in the consensus layer. The system can help with banking applications and supply chain systems that are blockchain-based. It highlights three key points: scalability, low delay, and efficient consensus, which are necessary for these systems to function properly.