Can we know the block height from which the ring signatures were implemented. Because i read few blocks which are pre-ring signature blocks where I see there are ring members repeating for a single transaction.
Ring CT was implemented in block #1220516 in January 2017. After September 2017, this feature became mandatory for all transactions on the network.
https://ww.getmonero.org/resources/moneropedia/ringCT.html
It's worth noting that RingCT is an improvement which added the Confidential Transactions part to the transaction format. Ring signatures existed before RingCT was implemented.
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can a ring signature have recurring ringmembers offsets? I found few transactions which have same ring members repeating in the same transaction – Kasichainula Keshav Dec 17 '18 at 19:34
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When you say "recurring ringmembers offsets" this is ambiguous. Please link to example tx. – jtgrassie♦ Dec 17 '18 at 20:52
