Transaction not yet indexed

i6SMffwcJxDXSGmfmiCdZLS4jdy8XZzUfbS8zGtWbCdtdbzWnrgQadGSAbYpGtPdoCKAC98CeDTCUPFNKNKsSx1

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