Transaction not yet indexed

SAn51e7mVbj8fwdBaXuFmLs6YUVhJapTCdGstA2Mp6qVy97K82dSGnrQvmJ1R4e5BpGAskrDacs3Rn5EHxiA4Mu

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