Like others have done, I sent some Lumens from Stargazer to Bittrex without a Memo Text. Bittrex says they can retrieve it if I provide them with the transaction ID. On stellarchain.io, I should be able to "input my public key and next to where it says 'Payment' ... see the transaction ID." I don't know where to input the public key on stellarchain.io. Can anyone help? Thanks.