Script based blockchain interaction
There may be provided a computer-implemented method. It may be implemented using a blockchain network such as, for example, the Bitcoin network. The computer-implemented method includes: i) receiving, at a node in a blockchain network, a first transaction associated with a digital asset, the first transaction specifying at least: a) a first set of constraints on a second transaction to transfer control of the digital asset, the first set of constraints including one or more constraints that cause the second transaction to contain a set of data from a blockchain; and b) a second set of constraints on the second transaction, the second set of constraints including one or more constraints associated with data items of the set of data; ii) verifying that the first set of constraints and the second set of constraints are satisfied; and iii) reassociating the digital asset based at least in part on the verifying.
1. A computer-implemented method comprising:
receiving, at a node in a blockchain network, a first transaction associated with a digital asset, the first transaction comprising a locking script, the locking script specifying at least:
a first set of constraints on a second transaction to transfer control of the digital asset, the first set of constraints including one or more constraints that cause the second transaction to contain a set of data from a blockchain, wherein the first set of constraints includes a constraint that the set of data includes a block header of the blockchain, wherein the first set of constraints includes a constraint that the set of data is received from a public blockchain and includes a block header chain that includes an ordered set of block headers, the ordered set of block headers including a plurality of block headers, the ordered set of block headers specifying an order associated with the plurality of block headers; and
a second set of constraints on the second transaction, the second set of constraints including one or more constraints associated with data items of the set of data;
determining, by the node, whether the constraint that the set of data is received from the public blockchain is satisfied by at least:
receiving in the second transaction, a first set of blocks including blocks before a block received from the blockchain network and a second set of blocks including blocks after the block received from the blockchain network;
verifying that the first set of blocks is chained to the block received from the blockchain network;
verifying that the second set of blocks is chained to the block received from the blockchain network;
verifying that the first set of blocks and the second set of blocks are valid; and
reassociating the digital asset in a block accessible to the blockchain network based at least in part on the verifying.
2. The computer-implemented method claimed in claim 1 , wherein the set of data is received at the node in the second transaction.
3. The computer-implemented method claimed in claim 1 , further comprising validating the second transaction as a result of the verifying.
4. The computer-implemented method claimed in claim 3 , wherein validating the second transaction is successfully performed without verifying that an entity that created the second transaction has access to secret information.
5. The computer-implemented method claimed in claim 1 , wherein the first set of constraints includes a constraint that the set of data includes a third transaction from a block of the blockchain.
6. The computer-implemented method claimed in claim 1 , wherein the second set of constraints includes a constraint derived from one or more values associated with the data items of the set of data.
7. A system, comprising:
a processor; and
memory including executable instructions that, as a result of execution by the processor, causes the system to:
receive, at a node in a blockchain network, a first transaction associated with a digital asset, the first transaction comprising a locking script, the locking script specifying at least:
a first set of constraints on a second transaction to transfer control of the digital asset, the first set of constraints including one or more constraints that cause the second transaction to contain a set of data from a blockchain, wherein the first set of constraints includes a constraint that the set of data includes a block header of the blockchain, wherein the first set of constraints includes a constraint that the set of data is received from a public blockchain and includes a block header chain that includes an ordered set of block headers, the ordered set of block headers including a plurality of block headers, the ordered set of block headers specifying an order associated with the plurality of block headers; and
a second set of constraints on the second transaction, the second set of constraints including one or more constraints associated with data items of the set of data: determine, by the node, whether the constraint that the set of data is received from the public blockchain is satisfied by at least:
receive in the second transaction, a first set of blocks including blocks before a block received from the blockchain network and a second set of blocks including blocks after the block received from the blockchain network;
verify that the first set of blocks is chained to the block received from the blockchain network; verify that the second set of blocks is chained to the block received from the blockchain network; verify that the first set of blocks and the second set of blocks are valid; and reassociate the digital asset in a block accessible to the blockchain network based at least in part on the verifying.
8. A non-transitory computer-readable storage medium having stored thereon executable instructions that, as a result of being executed by a processor of a computer system, cause the computer system to:
receive, at a node in a blockchain network, a first transaction associated with a digital asset, the first transaction comprising a locking script, the locking script specifying at least:
a first set of constraints on a second transaction to transfer control of the digital asset, the first set of constraints including one or more constraints that cause the second transaction to contain a set of data from a blockchain, wherein the first set of constraints includes a constraint that the set of data includes a block header of the blockchain, wherein the first set of constraints includes a constraint that the set of data is received from a public blockchain and includes a block header chain that includes an ordered set of block headers, the ordered set of block headers including a plurality of block headers, the ordered set of block headers specifying an order associated with the plurality of block headers; and
a second set of constraints on the second transaction, the second set of constraints including one or more constraints associated with data items of the set of data; determine, by the node, whether the constraint that the set of data is received from the public blockchain is satisfied by at least:
receive in the second transaction, a first set of blocks including blocks before a block received from the blockchain network and a second set of blocks including blocks after the block received from the blockchain network;
verify that the first set of blocks is chained to the block received from the blockchain network;
verify that the second set of blocks is chained to the block received from the blockchain network;
verify that the first set of blocks and the second set of blocks are valid; and
reassociate the digital asset in a block accessible to the blockchain network based at least in part on the verifying.