A computer-implemented method is provided, which comprises: generating a digital data block comprising transaction data representing at least one energy transfer transaction corresponding to an exchange of charge between a community member device and a charge source device, randomly selecting, in a group of community member devices, a plurality of block verification devices, wherein the block verification devices form a subgroup of block verification devices, partitioning a block verification computation task for the digital data block into a plurality of block verification computation subtasks, assigning the block verification computation subtasks to respective selected block verification devices, transmitting the digital data block to each selected block verification device, together with its respective block verification computation subtask over a computer network, determining that the digital data block is verified, based on at least one verification results of a corresponding block verification computation subtask, and adding the verified block to a blockchain-enabled storage system.