Method for issuing, redeeming, refunding, settling and revoking electronic voucher by using utxo-based protocol, and server employing same

A server for issuing at least one specific electronic voucher granting a transferrable monetary value by at least one specific issuer, comprising:

• at least one memory that stores instructions;
• and
• at least one processor configured to execute the instructions to perform processes of:
• receiving from a specific issuer, at the server, a request for issuing the specific electronic voucher;
• acquiring in the request, at the server, (i) specific issuing data, (ii) a public key of the specific issuer, and (iii) a signature value of the specific issuer generated by signing the specific issuing data with a private key of the specific issuer or signing a voucher function value of the specific issuing data with the private key of the specific issuer, wherein the electronic voucher also has a transferrable monetary value, wherein the specific issuing data includes at least one of (i) a type of the specific electronic voucher, (ii) a public key of a specific user who is a buyer of the specific electronic voucher, (iii) issuance value of the specific electronic voucher, (iv) a unique ID of the specific issuer, and (v) an expiration date of the specific electronic voucher;
• determining, using the server, validity of (i) the specific issuing data, (ii) the public key of the specific issuer, and (iii) the signature value of the specific issuer;
• once each of the validities are determined,
• performing, using the server, processes of registering in a blockchain network, a voucher-issuing transaction of the specific electronic voucher including (i) the specific issuing data, (ii) the public key of the specific issuer, and (iii) the signature value of the specific issuer;
• and
• providing, using the server, a first transaction ID representing a first location of the voucher-issuing transaction registered in the blockchain network, and
• wherein the voucher issuing transaction of the specific electronic voucher is used to
• define a process related to the specific electronic voucher and indicate issuing of the specific electronic voucher,
• define a tangible or intangible value of the specific electronic voucher, and
• identify the specific issuer.