Transaction not yet indexed

iSTL12Zx4sUVJcXeP2VGEDXc8xcPj7BEKnGeD1ajTqLXf9r9BWbythwPJqq84d1s7dss8exeaSk89fs8qNShmQm

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