Cross-chain transactions with hash time lock contracts in a distributed ledger system

A non-transitory computer-readable storage medium storing computer program instructions executable by a processor, the instructions comprising instructions to:

• receive, by a settlement bot executing on a source ledger, from a source entity delegate bot representing a source entity and executing on the source ledger, a hashlock value based on a secret value generated by the source entity delegate bot, and transaction information comprising a cross-ledger transaction identifier, an identifier of a source asset associated with the source entity on the source ledger, and an identifier of a destination entity;
• generate, by the settlement bot, a set of settlement instructions based on the transaction information, wherein the set of settlement instructions comprises one or more smart contracts governing one or more transactions on the source ledger, including a particular transaction to transfer the source asset from the source entity to the destination entity on the source ledger;
• lock, by the settlement bot, the source asset in a first hash time locked contract (HTLC) using the hashlock value, wherein the first HTLC is associated with the set of settlement instructions based on the cross-ledger transaction identifier;
• receive, by the settlement bot, the secret value;
• and
• settle, by the settlement bot, the set of settlement instructions, instructions to settle the set of settlement instructions comprising instructions to:
• unlock the first HTLC using the secret value;
• and
• execute the set of settlement instructions, the executing comprising transferring the source asset to a destination account on the source ledger associated with the destination entity.

A system, comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium storing computer program instructions executable by the processor, the computer program instructions comprising instructions to:
• receive, by a settlement bot executing on a source ledger, from a source entity delegate bot representing a source entity and executing on the source ledger, a hashlock value based on a secret value generated by the source entity delegate bot, and transaction information comprising a cross-ledger transaction identifier, an identifier of a source asset associated with the source entity on the source ledger, and an identifier of a destination entity;
• generate, by the settlement bot, a set of settlement instructions based on the transaction information, wherein the set of settlement instructions comprises one or more smart contracts governing one or more transactions on the source ledger, including a particular transaction to transfer the source asset from the source entity to the destination entity on the source ledger;
• lock, by the settlement bot, the source asset in a first hash time locked contract (HTLC) using the hashlock value, wherein the first HTLC is associated with the set of settlement instructions based on the cross-ledger transaction identifier;
• receive, by the settlement bot, the secret value;
• and
• settle, by the settlement bot, the set of settlement instructions, instructions to settle the set of settlement instructions comprising instructions to:
• unlock the first HTLC using the secret value;
• and
• execute the set of settlement instructions, the executing comprising transferring the source asset to a destination account on the source ledger associated with the destination entity.