Transaction not yet indexed

666Mcs9sCeKeCDY2xBjSZ3e7NNMCdkgq67NF7yhKYV1ozyDnzBU8xi4hpPvmbrVkurvVFpzwGsrziiUQoLUPSqBS

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