As of my last knowledge update in September 2021, XRP (XRP) is a cryptocurrency associated with the Ripple network, which aims to facilitate fast and low-cost cross-border payments. It’s important to note that Ripple primarily focuses on enabling direct transfers of value between different fiat currencies, rather than emphasizing smart contract functionality like Ethereum.
However, your mention of “XRP Smart Contract Sidechain” (XRP+) seems to refer to a hypothetical or potential development beyond my last update. If such a concept has emerged after September 2021, I won’t have information on it.
In a speculative context, an “XRP Smart Contract Sidechain” could imply the integration of smart contract capabilities into the XRP ecosystem, possibly through the use of sidechains. Sidechains are separate blockchains that are interoperable with a main blockchain (in this case, XRP’s main blockchain). They can be used to implement features or functionality that might not be directly supported on the main chain.
Again, please verify this information with up-to-date and reliable sources, as developments in the cryptocurrency space can occur rapidly and my last training data only extends up until September 2021.