Carbon footprint blockchain network

A computing system comprising:

• a storage configured to store a plurality of transactions in a plurality of blocks on a carbon footprint blockchain and store carbon footprint values of the plurality of transactions in non-encrypted headers of the plurality of blocks, where each transaction and its content are encrypted within a block of the plurality of blocks, and the carbon footprint values stored in the non-encrypted headers comprise positive and negative numerical values;
• a network interface configured to receive a transaction request between a user and a merchant from a merchant terminal which comprises an identification of an item, an identification of the user, and a timestamp;
• and
• a processor configured to
• invoke chaincode installed on a blockchain peer of the carbon footprint blockchain in response to the received transaction request;
• read, via the invoked chaincode installed on the blockchain peer of the carbon footprint blockchain, carbon footprint values of the user from previous transactions of the user stored within the non-encrypted headers of the plurality of blocks on the carbon footprint blockchain which have occurred within a predetermined period of time with respect to a time value of the timestamp and which are read from the non-encrypted headers of the plurality of blocks on the carbon footprint blockchain,
• aggregate the carbon footprint values of the user from the previous transactions of the user within the predetermined period of time;
• and
• determine, via the chaincode of the carbon footprint blockchain, whether to approve or reject the transaction request based on the aggregate carbon footprint value of the user and a carbon footprint value of the item,
• wherein the processor is further configured to control the network interface to transmit the determination to the merchant terminal.

A non-transitory computer readable medium having stored therein program instructions that when executed cause a computer to perform a blockchain processing method comprising:

• storing a plurality of transactions in a plurality of blocks on a carbon footprint blockchain and storing carbon footprint values of the plurality of transactions in non-encrypted headers of the plurality of blocks, where each transaction and its content are encrypted within a block of the plurality of block, and the carbon footprint values stored in the non-encrypted headers comprise positive and negative numerical values;
• receiving a transaction request between a user and a merchant from a merchant terminal which comprises an identification of an item, an identification of the user, and a timestamp;
• invoking chaincode installed on a blockchain peer of the carbon footprint blockchain in response to the received transaction request;
• reading, via the invoked chaincode installed within the blockchain peer of the carbon footprint blockchain, carbon footprint values of the user from previous transactions of the user stored within the non-encrypted headers of the plurality of blocks on the carbon footprint blockchain which have occurred within a predetermined period of time with respect to a time value of the timestamp and which are read from the non-encrypted headers of the plurality of blocks on the carbon footprint blockchain;
• aggregating the carbon footprint values of the user from the previous carbon footprint transactions of the user within the predetermined period of time;
• determining, via the chaincode of the carbon footprint blockchain, whether to approve or reject the transaction request based on the aggregate carbon footprint value of the user and a carbon footprint value of the item;
• and
• transmitting the determination to the merchant terminal.