System, method and program product for depositing and withdrawing stable value digital assets in exchange for fiat

A computing device comprising:

• one or more processors;
• and
• non-transitory computer-readable memory operatively connected to the one or more processors and having stored thereon computer-readable instructions to perform the steps of:
• authenticating, by the computing device associated with a digital asset exchange, an access request by a first user device associated with a first user to the computing device;
• receiving, by the computing device from the first user device, a withdraw request including a first electronic request to withdraw stable value digital asset tokens, wherein each stable value digital asset token is tied to an underlying digital asset which is maintained on a distributed public transaction ledger in the form of a blockchain that is maintained by a blockchain network including a plurality of geographically distributed computer systems in a peer-to-peer network and each stable value digital asset token is issued based on first smart contract instructions provided at a first contract address on the blockchain;
• in response to the first electronic request, obtaining, by the computing device from a fiat account ledger database stored on computer readable member accessible by the computing device, first account balance information of the first user indicating a first amount of available fiat for the first user held by the computing device on behalf of the first user;
• determining, by the computing device, a second amount of fiat based on the first amount of stable value digital asset tokens, where the second amount of fiat is determined using a fixed predetermined ratio of stable value digital asset tokens to fiat;
• generating, by the computing device, a first transaction request for the blockchain, from a first digital asset exchange public key address on the blockchain, which is mathematically related to a first digital asset exchange private key, which is stored in the computer readable member accessible by the computing device, to the first contract address associated with a stable value digital asset token issuer;
• and
• confirming, by the computing device based on reference to the blockchain, that the first transaction request has been processed by the blockchain network so that a balance of stable value digital asset tokens in a destination public address of the first user includes the first amount of stable value digital asset tokens.

A computer implemented method comprising:

• authenticating, by a digital asset exchange computer system associated with a digital asset exchange, an access request by a first user device associated with a first user to the digital asset exchange computer system;
• receiving, by the digital asset exchange computer system from the first user device, a withdraw request including a first electronic request to withdraw stable value digital asset tokens, wherein each stable value digital asset token is tied to an underlying digital asset which is maintained on a distributed public transaction ledger in the form of a blockchain that is maintained by a blockchain network including a plurality of geographically distributed computer systems in a peer-to-peer network and each stable value digital asset token is issued based on first smart contract instructions provided at a first contract address on the blockchain;
• in response to the first electronic request, obtaining, by the digital asset exchange computer system from a fiat account ledger database stored on computer readable member accessible by the digital asset exchange computer system, first account balance information of the first user indicating a first amount of available fiat for the first user held by the digital asset exchange computer system on behalf of the first user;
• determining, by the digital asset exchange computer system, a second amount of fiat based on the first amount of stable value digital asset tokens, where the second amount of fiat is determined using a fixed predetermined ratio of stable value digital asset tokens to fiat;
• generating, by the digital asset exchange computer system, a first transaction request for the blockchain, from a first digital asset exchange public key address on the blockchain, which is mathematically related to a first digital asset exchange private key, which is stored in the computer readable member accessible by the digital asset exchange computer system, to the first contract address associated with a stable value digital asset token issuer;
• and
• confirming, by the digital asset exchange computer system based on reference to the blockchain, that the first transaction request has been processed by the blockchain network so that a balance of stable value digital asset tokens in a destination public address of the first user includes the first amount of stable value digital asset tokens.