Transaction not yet indexed

21b15iCNhM7VuWuZBYpomzoHC2a7FQbWLA2xB5qRVwHmzhedsFrC1V1oViLqt23dPCmbQfbAKtFL8fZXeaTNH5Cq

The transaction signature is valid but not yet indexed by this RPC node, or the transaction failed before inclusion.