Abstract: A method of facilitating concurrent blockchain transactions for a plurality of users in a transaction system having respective user blockchain accounts each having a token balance comprises providing, at a blockchain network, an aggregator account having a token balance; generating a plurality of child accounts of the aggregator account; periodically initiating, at the blockchain network, a plurality of top-up transactions to transfer tokens from the aggregator account to the plurality of child accounts; and concurrently incrementing the respective token balances for the plurality of users by initiating, at the blockchain network, a plurality of user top-up transactions to transfer tokens from the plurality of child accounts to the user blockchain accounts.