Secure and trustworthy bridge for transferring assets across different networks with an updating pool of wardens

A system for secure transfer of assets between blockchain networks, the system comprising:

• a particular warden server of a second pool of warden servers, the particular warden server comprising one or more processors and memory, the memory storing instructions that, when executed by the one or more processors cause the particular warder server to receive, from a bridge program, i) a corresponding migration-prepared instruction;
• ii) a corresponding second portion of a second secret;
• and iii) a complete migration request;
• wherein the bridge program comprises instructions stored in the memory that, when executed by the one or more processors providing a secure execution environment, cause a secure-execution server to perform operations comprising:
• determining to initiate a migration from a first master secret to a second master secret;
• receiving a corresponding portion of the first master secret from each warden server of a first pool;
• receiving, from the first pool of warden servers, a listing of second assets;
• receiving, from the first pool of warden servers, a listing of first assets;
• generating the second master secret;
• generating, from the second master secret and for each warden server of a second pool of warden servers, a corresponding second portion of the second master secret;
• deriving address information from the second master secret for a first blockchain network and a second blockchain network;
• generating, for each second asset, second transaction-data to instruct the second blockchain network to transfer the second assets to a second wallet of the second blockchain network, the second wallet referenced with the address information derived from the second master secret;
• generating, for each first asset, first transaction-data to instruct the first blockchain network to transfer the first assets to a first wallet of the first blockchain network, the first wallet referenced with the address information derived from the second master secret;
• generating a migration-prepared data-object comprising encrypting each of the second portions of the second master secret, the first transaction-data, and the second transaction-data;
• generating, for each warden server of the second pool, a migration-prepared instruction corresponding to the warden server of the second pool, by encrypting, with the corresponding second portion of the second master secret, i) the migration-prepared data object, ii) the first master secret, and iii) the second master secret;
• sending, to each warden server of the second pool, the corresponding migration-prepared instruction;
• sending, to each warden server of the second pool, the corresponding second portion of the second master secret;
• and
• sending, responsive to receiving, from each warden server of the second pool, acknowledgement of receipt of the corresponding migration-prepared instruction, a complete migration request configured to cause each warden server of the second pool to migrate from the first master secret to the second master secret.

A non-transitory computer-readable medium storing a bridge program configured to execute in a secure execution environment to interact with a first pool of warden servers to facilitate secure transfer of assets between a first blockchain network and a second blockchain network, the bridge program comprising instructions that, when executed by the secure execution environment, cause a secure-execution server to perform operations comprising:

• determining to initiate a migration from a first master secret to a second master secret;
• receiving a corresponding portion of the first master secret from each warden server of the first pool;
• receiving, from the first pool of warden servers, a listing of second assets;
• receiving, from the first pool of warden servers, a listing of first assets;
• generating a second master secret;
• generating, from the second master secret and for each warden server of a second pool of warden servers, a corresponding second portion of the second master secret;
• deriving address information from the second master secret for the first blockchain network and the second blockchain network;
• generating, for each second asset, second transaction-data to instruct the second blockchain network to transfer the second assets to a second wallet of the second blockchain network, the second wallet referenced with the address information derived from the second master secret;
• generating, for each first asset, first transaction-data to instruct the first blockchain network to transfer the first assets to a first wallet of the first blockchain network, the first wallet referenced with the address information derived from the second master secret;
• generating a migration-prepared data-object comprising encrypting each of the second portions of the second master secret, the first transaction-data, and the second transaction-data;
• generating, for each warden server of the second pool, a migration-prepared instruction corresponding to the warden server of the second pool, by encrypting, with the corresponding second portion of the second master secret, i) the migration-prepared data object, ii) the first master secret, and iii) the second master secret;
• sending, to each warden server of the second pool, the corresponding migration-prepared instruction;
• sending, to each warden server of the second pool, the corresponding second portion of the second master secret;
• and
• sending, responsive to receiving, from each warden server of the second pool, acknowledgement of receipt of the corresponding migration-prepared instruction, a complete migration request configured to cause each warden server of the second pool to migrate from the first master secret to the second master secret.