Abstract: A method of handling transactions using blockchain networks is provided. The method includes steps of: a transaction-managing server (a) if requests for registering transactions are acquired, confirming each validity of each of said transactions and queueing each of said transactions in case it is determined as valid; (b) classifying the queued transactions such that each of the queued transactions corresponds to each of the blockchain networks per each of channels; and (c) by transmitting each of the classified queued transactions to each of the blockchain networks, instructing each of the blockchain networks to convert the classified queued transactions per each of the channels into one representative transaction per each of the channels, and if a distributive consensus on the converted representative transaction is reached, allowing one block including the classified queued transactions corresponding to said one representative transaction to be registered in one of distributed ledgers.

Abstract: A method for handling one or more transactions using at least one blockchain network is provided. The method includes steps of: (a) a transaction server, if one or more requests for registering one or more transactions are acquired, confirming storage space of an n-th distributed ledger to register one or more current blocks, corresponding to the transactions, in the n-th distributed ledger which is in an active state; and (b) the transaction server, if the storage space is determined as satisfying at least one preset condition, generating at least one representative block by referring to the transactions in the current blocks registered in the n-th distributed ledger, creating an (n+1)-th distributed ledger whose genesis block is the representative block, and registering one or more next blocks, which are requested for registration after the representative block is registered, in the (n+1)-th distributed ledger.

Abstract: A method for token management of exchanging between a first cryptocurrency used by a first blockchain network and a second cryptocurrency used by a second blockchain network dependent on the first cryptocurrency is provided. The method includes steps of: a token-managing server (a) if a user's request for converting the first into the second cryptocurrencies is acquired, instructing the first blockchain network to transfer ownership of the first cryptocurrency to the token-managing server and issue the second cryptocurrency and instructing the second blockchain network to transfer ownership of the second cryptocurrency to the user; and (b) if a request of the user for converting the second into the first cryptocurrencies is acquired, instructing the second blockchain network to transfer ownership of the second cryptocurrency to the token-managing server and revocate the second cryptocurrency and instructing the first blockchain network to transfer ownership of the first cryptocurrency to the user.