Transaction Replacing Method, Transaction Queuing Method, Device, and Storage Medium

A transaction replacing method, suitable for node of a blockchain, comprising:

• receiving a first transaction to be stored into a memory pool and transmitted by a client;
• and
• determining, by means of whether a first predecessor transaction information of the first transaction is null, whether the first transaction is a first-type transaction for replacing a predecessor transaction or a second-type transaction not for replacing a predecessor transaction:
• if the first transaction is a first-type transaction, then querying whether the predecessor transaction of the first transaction is present in the memory pool on the basis of the first predecessor transaction information:
• if yes, deleting the first predecessor transaction from the memory pool and saving the first transaction into the memory pool, wherein the first predecessor transaction information is the transaction hash of the predecessor transaction of the first transaction.

A transaction queuing method, suitable for node of a blockchain, comprising:

• generating a queue information according to price indexes of transactions in a memory pool in order to sequence the transactions, wherein the queue information is utilized for packaging the transactions in order, wherein each of the price indexes is positively correlated to a fee of a miner, wherein each of the transactions is a transaction in the memory pool after the node executes a transaction replacing method which comprises:
• receiving a first transaction to be stored into the memory pool and transmitted by a client;
• and
• determining, by means of whether a first predecessor transaction information of the first transaction is null, whether the first transaction is a first-type transaction for replacing a predecessor transaction or a second-type transaction not for replacing a predecessor transaction:
• if the first transaction is a first-type transaction, then querying whether the predecessor transaction of the first transaction is present in the memory pool on the basis of the first predecessor transaction information:
• if yes, deleting the first predecessor transaction from the memory pool and saving the first transaction into the memory pool, wherein the first predecessor transaction information is the transaction hash of the predecessor transaction of the first transaction.

A transaction replacing method, adapted for a client, comprising:

• sending a first transaction with a first predecessor transaction information to a first blockchain node, so as for the first blockchain node to receive the first transaction;
• and
• determining, by means of whether the first predecessor transaction information of the first transaction is null, whether the first transaction is a first-type transaction for replacing a predecessor transaction or a second-type transaction not for replacing a predecessor transaction:
• if the first transaction is a first-type transaction, then querying whether the predecessor transaction of the first transaction is present in a memory pool on a basis of the first predecessor transaction information:
• if yes, deleting the first predecessor transaction from the memory pool and saving the first transaction into the memory pool, wherein the first predecessor transaction information is a transaction hash of the predecessor transaction of the first transaction.