IP Library › Granted Patent US 12,586,067
Granted Patent B2
US 12,586,067 · App. 18/243,616 · Granted Mar 24, 2026

Duplicating smart contracts with termination condition

Inventors: Ying Chan (Cambridge, GB); Dean Kramer (London, GB)
Assignee: NCHAIN LICENSING AG
G06Q20/389G06F16/2379G06F21/6209G06F21/645G06Q20/065G06Q20/0658G06Q20/36G06Q20/3674G06Q20/3825G06Q20/3829H04L9/0637H04L9/0643H04L9/30H04L9/3236H04L9/3239H04L9/3247G06Q10/10G06Q2220/00H04L9/3066H04L9/3252H04L9/50H04L2209/56
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Quick Facts
Patent No.
US 12,586,067
App. No.
18/243,616
Granted
Mar 24, 2026
Kind
B2
Abstract

The invention relates to distributed ledger technologies such as consensus-based blockchains. Computer-implemented methods for locking and unlocking blockchain transactions are described. The invention is implemented using a blockchain network. A first unlocking script of the unlocking blockchain transaction is configured to unlock a first locking script, wherein the first locking script is configured, when executed together with the first unlocking script, to determine, based on the first locking script and a constraint for verifying the unlocking blockchain transaction. Verifying the unlocking blockchain transaction is based on a set of constraints and corresponding field of the unlocking blockchain transaction, wherein data is based on the set of constraints. Providing data at the corresponding field of the unlocking blockchain transaction. Finally, making the unlocking blockchain transaction available to one or more nodes of a blockchain network.

Claims (23)

1 . A computer-implemented method for execution of a parameterized smart contract, the method comprising:

receiving, at a validation node in a blockchain network, an unlocking blockchain transaction to be validated, the unlocking blockchain transaction including a first unlocking script;

executing the first unlocking script to obtain a first set of field values of the unlocking blockchain transaction;

obtaining a previous blockchain transaction associated with the parameterized smart contract, the previous blockchain transaction including providing a first locking script;

executing the first locking script to cause the validation node to:

determine, based on the first locking script, a constraint for verifying the unlocking blockchain transaction; and

verify the unlocking blockchain transaction based on the constraint and the first set of field values of the unlocking blockchain transaction;

validating the unlocking blockchain transaction based on the verification; and

propagating the validated unlocking blockchain transaction to one or more nodes of the blockchain network.

2 . The computer-implemented method of claim 1 , wherein the first locking script is configured to verify the unlocking blockchain transaction by:

obtaining data of the first set of field values of the unlocking blockchain transaction; and

comparing the data and the constraint, wherein the unlocking blockchain transaction is verified if the data and the constraint match.

3 . The computer-implemented method of claim 1 , wherein the first locking script is configured to determine the constraint by:

obtaining the constraint from an output of the previous blockchain transaction comprising the first locking script.

4 . The computer-implemented method of claim 3 , wherein the constraint is obtained from the first locking script.

5 . The computer-implemented method of claim 3 , wherein the constraint is an amount of unspent transaction output.

6 . The computer-implemented method of claim 1 , wherein the first locking script is configured to determine the constraint by:

obtaining a parameter from the first locking script; and

computing the constraint based on the parameter.

7 . The computer-implemented method of claim 6 , wherein the constraint is further based on an unspent transaction output of an output of the previous blockchain transaction, the output comprising the first locking script.

8 . The computer-implemented method of claim 1 , wherein the first locking script defines the first set of field values of the unlocking blockchain transaction.

9 . The computer-implemented method of claim 5 , wherein the first set of field values of the unlocking blockchain transaction comprises an unspent transaction output amount of at least one output of the unlocking blockchain transaction.

10 . The computer-implemented method of claim 4 , wherein the first set of field values of the unlocking blockchain transaction comprises a locking script of the unlocking blockchain transaction.

Assignments (7)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 8, 2023
From: CHAN, YING; KRAMER, DEAN
To: NCHAIN HOLDINGS LTD
Reel/Frame 064849/0034 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 8, 2023
From: CHAN, YING; KRAMER, DEAN
To: NCHAIN HOLDINGS LTD
Reel/Frame 064849/0121 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 8, 2023
From: CHAN, YING; KRAMER, DEAN
To: NCHAIN HOLDINGS LTD
Reel/Frame 064849/0172 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 8, 2023
From: CHAN, YING; KRAMER, DEAN
To: NCHAIN HOLDINGS LTD
Reel/Frame 064849/0270 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 8, 2023
From: CHAN, YING; KRAMER, DEAN
To: NCHAIN HOLDINGS LTD
Reel/Frame 064849/0339 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 8, 2023
From: CHAN, YING; KRAMER, DEAN
To: NCHAIN HOLDINGS LTD
Reel/Frame 064849/0425 →
CHANGE OF NAME Recorded Sep 8, 2023
From: NCHAIN HOLDINGS LTD
To: NCHAIN LICENSING AG
Reel/Frame 064852/0557 →
Priority Claims (6)
GB 1708185 · May 22, 2017 · national
GB 1708190 · May 22, 2017 · national
GB 1708192 · May 22, 2017 · national
GB 1708196 · May 22, 2017 · national
GB 1708198 · May 22, 2017 · national
GB 1708200 · May 22, 2017 · national
Continuity (2)
Continuation 16616278
Related Publication 20230419319A1 · Dec 28, 2023
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