Abstract: A method of providing a transaction forwarding service in a blockchain includes executing a smart contract in the blockchain so as to determine whether a respective full node is eligible to execute the smart contract. The smart contract specifies eligible full nodes, a filter of a respective light client and a reward for executing the smart contract. The respective full node forwards data relating to a transaction that matches the filter of the respective light client to the respective light client with a proof that the transaction is included in the blockchain. The respective full node receives a signed acknowledgement from the respective light client verifying the transaction. Then, the respective full node claims the reward using the acknowledgement.

Abstract: A method for controlling access to a shared resource for a plurality of collaborative users includes securely providing, on a storage and device entity, the shared resource. The shared resource is created by a resource owner entity. The method further includes specifying access control rules for the shared resource, translating the access control rules into a smart contract, including the smart contract into a blockchain, and if a second user requests access to the shared resource, performing access decisions for the shared resource by evaluating the smart contract with regard to the access control rules.

Abstract: A method for controlling access to a shared resource for a plurality of collaborative users includes securely providing, on a storage and device entity, the shared resource. The shared resource is created by a resource owner entity. The method further includes specifying access control rules for the shared resource, translating the access control rules into a smart contract, including the smart contract into a blockchain, and if a second user requests access to the shared resource, performing access decisions for the shared resource by evaluating the smart contract with regard to the access control rules.

Abstract: A method of providing a transaction forwarding service in a blockchain includes executing a smart contract in the blockchain so as to determine whether a respective full node is eligible to execute the smart contract. The smart contract specifies eligible full nodes, a filter of a respective light client and a reward for executing the smart contract. The respective full node forwards data relating to a transaction that matches the filter of the respective light client to the respective light client with a proof that the transaction is included in the blockchain. The respective full node receives a signed acknowledgement from the respective light client verifying the transaction. Then, the respective full node claims the reward using the acknowledgement.