Too Long; Didn't Read
Chainlink, Cosmos, Polkadot, and Wanchain are claiming to give true blockchain interoperability. The term "blockchain interoperability" means two blockchains to communicate with each other and to do cross-chain transactions without depending on a third party. Chainlink can help to implement a smart contract based payment/data transfer between a centralized system and a blockchain with no change in its moral of the centralized system. Wanchin is focusing on financial industries, and it can communicate to other blockchains for the financial. transactions.