Transaction

Hash
7ce1e8009d7746fa435d117befd76a3ef821f5b55123237e6f274df329df7c78
Block
531265 · 2018-05-21 18:21 · 319,710 confirmations
Data
memo-reply
Size
422 bytes
Fee
424 sats (1.00473928 sat/B)

replied 2230d
That would rely on the client, but the memo protocol is decentralized. Probably best method is like with TXs, only the first to set the username is valid (1st on blockchain/timestamp)

Inputs (1)

Index
0
Previous Output
30440220648f98bcbf659a2b0408b1600d4ee2eda369dffb6288c48a77e49372cd5123a902207d701979932034d06fb5ab65ddedb74d0e72d6a5ceb0017d2ed1ef53f0daadf841 024d68c7bfcda63acf71abaadfbe03a1b145fc1f630f90c547210c764790205e86

Outputs (2)

Index
0
OP_DUP OP_HASH160 1915f0bc639dd1f57b998ba3bc7ff60702b6df99 OP_EQUALVERIFY OP_CHECKSIG
Index
1
Type
OP_RETURN
OP_RETURN 6d03 7560315465132cbdb27c5dee9e481cf3e55480021b16cfcd672bb070d489d829 5468617420776f756c642072656c79206f6e2074686520636c69656e742c2062757420746865206d656d6f2070726f746f636f6c20697320646563656e7472616c697a65642e2050726f6261626c792062657374206d6574686f64206973206c696b652077697468205458732c206f6e6c792074686520666972737420746f207365742074686520757365726e616d652069732076616c69642028317374206f6e20626c6f636b636861696e2f74696d657374616d7029

Raw

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