Transaction not yet indexed

21mmp4pAK4dC8mxonYHA9mVKU7F8wKyFiUdp9tuSwzDoBgGXqmdT898it2Aq5F5Hg2DvJVZpVMBVezkCJWpHPNRM

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