I notice that many coinbase transactions(like in block 720,815) with locktime=0x00000000 and sequence=0xFFFFFFFF, which means UTXO could be spent immediately. There seems to be no limit to coinbase's immediate use.
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duplicate of bitcoin.stackexchange.com/questions/1991/…– Mike DJan 29, 2022 at 13:03
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2Does this answer your question? What is the block maturation time?– Pieter WuilleJan 29, 2022 at 14:26
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I know there is a block maturation time, i just don't understand how to implement it? when nodes verify UTXO, is there extra step to verify coinbase UTXO height ? why don't just use CLTV or CSV ?– KHJUAF403456ZS3K564WAEFJan 30, 2022 at 2:31
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Coinbase maturity is verified here: github.com/bitcoin/bitcoin/blob/master/src/consensus/…– bordalixJan 30, 2022 at 6:33
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