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Subject: [bitcoindev] UTXO checkpoint transactions
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Has it been considered to add a UTXO checkpoint transaction
Here's how it would work
Someone submits a transaction that contains a large fee and a hash of the
UTXO set along with block height as opcode parameter
Miners refuse to include this transaction unless the hash of the UTXO set
matches
Because performing that hash is expensive, it should have an extremely high
cost factor, equivalent to say a 100KB transaction or something
These checkpoints are explicitly for the purpose of fast-synchronizing
extremely lightweight nodes. It's reasonable to refuse to use a checkpoint
that isn't at least several months old. It should be easy for anyone to
find a sufficiently aged checkpoint and synchronize from that point onward.
Or is this just a solution without a problem?
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<div dir=3D"auto">Has it been considered to add a UTXO checkpoint transacti=
on=C2=A0<div dir=3D"auto"><br></div><div dir=3D"auto">Here's how it wou=
ld work=C2=A0</div><div dir=3D"auto"><br></div><div dir=3D"auto">Someone su=
bmits a transaction that contains a large fee and a hash of the UTXO set al=
ong with block height as opcode parameter=C2=A0</div><div dir=3D"auto"><br>=
</div><div dir=3D"auto">Miners refuse to include this transaction unless th=
e hash of the UTXO set matches=C2=A0</div><div dir=3D"auto"><br></div><div =
dir=3D"auto">Because performing that hash is expensive, it should have an e=
xtremely high cost factor, equivalent to say a 100KB transaction or somethi=
ng=C2=A0</div><div dir=3D"auto"><br></div><div dir=3D"auto">These checkpoin=
ts are explicitly for the purpose of fast-synchronizing extremely lightweig=
ht nodes.=C2=A0 It's reasonable to refuse to use a checkpoint that isn&=
#39;t at least several months old.=C2=A0 =C2=A0It should be easy for anyone=
to find a sufficiently aged checkpoint and synchronize from that point onw=
ard.</div><div dir=3D"auto"><br></div><div dir=3D"auto"><br></div><div dir=
=3D"auto">Or is this just a solution without a problem?</div><div dir=3D"au=
to"><br></div><div dir=3D"auto"><br></div><div dir=3D"auto"><br></div><div =
dir=3D"auto"><br></div><div dir=3D"auto"><br></div><div dir=3D"auto"><br></=
div></div>
<p></p>
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