Transaction not yet indexed

MEmXftBBm8jNWjG2advbAV2bCKk2izFN3DciDu6KD8rDqEeegQU5JNkSP6PpZT5ffZcBY5PfrTM6aoQSpzW5MgJ

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