sipa changed the topic of #bitcoin-wizards to: This channel is for discussing theoretical ideas with regard to cryptocurrencies, not about short-term Bitcoin development | http://bitcoin.ninja/ | This channel is logged. | For logs and more information, visit http://bitcoin.ninja
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<jl2012>
Let say 3 people (A, B, C) want to do 2-of-3 with Schnorr. There are 3 private keys: (a, b, c). A will generate a random number (a'), and he will give a' to B, and give a-a' to C
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<jl2012>
I think the same could be done with BIP32 xprv? But it's only possible to sign for non-hardened child key?
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<jl2012>
so in the setup phrase, they will share their xpub with each other. For the private part of xprv, they will distribute the fragments to the right people. So they can create non-hardened child pubkeys which look like 1-of-1 without further interaction (until they need to spend)
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<xmlnewbi>
I think i found a bug in bitcoin 16.3
<xmlnewbi>
its minor though
<xmlnewbi>
in legacy mode we are returning scriptPubKey even on legacy addresses
<xmlnewbi>
instead of pubkey
<xmlnewbi>
can anyone confirm
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<sipa>
xmlnewbi: returning where?
<xmlnewbi>
on validateaddress
<xmlnewbi>
to reproduce, set -addresstype=legacy on start
<xmlnewbi>
make new address
<sipa>
validateaddress should always report the scriptPubKey of the address
<xmlnewbi>
and on validate address it will who isscript:false AND scriptPubKey
<sipa>
an address is a shorthand notation for a script
<xmlnewbi>
but its not script
<xmlnewbi>
the old version would list as pubkey
<xmlnewbi>
this broke my stuffs, and just found this
<sipa>
the isscript refers to whether the address is a p2sh or p2wsh address
<sipa>
oh, maybe you want the new getaddressinfo RPC?
<sipa>
some of the functionality from validateaddress was moved to getaddressinfo
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<xmlnewbi>
my multi-sig tools use legacy addresses, and to get the pubkey I would use validateaddress, 16.2 lists legacy addresses pubkeys as pubkey, 16.3 lists as scriptpubkey
<sipa>
try getaddressinfo
<xmlnewbi>
legacy addresses are not script right? so its a misslable
<xmlnewbi>
still scriptPubKey
<sipa>
every address is a shorthand for a scriptPubKe
<xmlnewbi>
in getaddressinfo
<sipa>
not every address is a P2SH address
<xmlnewbi>
"isscript": false, "iswitness": false,
<xmlnewbi>
"scriptPubKey": "76blabla
<sipa>
yes
<sipa>
but it will also give you the pubkeys involved
<xmlnewbi>
scriptPubKey != pubkey? right? they are not compatible
<sipa>
sigh
<sipa>
every. address. is
<sipa>
every. address. is. the. shorthand. for. a. scriptPubKey.
<sipa>
it is just telling you the expanded form of the address into a scriptPubKey
<sipa>
and yes, even legacy addresses have a scriptPubKey
<sipa>
that's how bitcoin works
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<sipa>
also, validateaddress has always reported the scriptPubKey
<xmlnewbi>
these values are much shorter than the pubkeys I was using before
<xmlnewbi>
this issue came up after upgrading, if I rolled back it would be giving format that was working for me
<sipa>
nothing changed in 0.16.3 related to this
<sipa>
0.16.0 introduced some changes to validateaddress though
<sipa>
and pubkeys are pubkeys
<sipa>
there are compressed one (which start with 02 or 03 and are 33 byteels, and uncompressed ones which start with 04 and are 65 bytes
<xmlnewbi>
but addmultisig is not working with this format, its breaking on invalid address, and my hard coded from before is a good length longer
<xmlnewbi>
is there a way to show the 02 format?
<sipa>
which format?
<sipa>
there is no such thing as "format"
<sipa>
there are just compressed and uncompressed pubkeys
<sipa>
it is showing you the singular pubkey associated with the address
<sipa>
if you change the type of pubkey, the address change
<xmlnewbi>
this scriptpubkey is really a pubkey, its opcodes
<sipa>
ignore the scriptpubkey
<sipa>
it is not the pubkey
<sipa>
it is the expanded form of the address
<sipa>
look for the "pubkey" or "pubkeys" field in getaddressinfo
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<sipa>
you can also run with the "deprecatedrpc=validateaddress" config option to get part of the old functionality from validateaddress back
<sipa>
but you should make your software work with getaddressinfo instead, as the old behaviour will disappear in a few release
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<xmlnewbi>
ah, getaddressinfo has exactly what im looking for, its right here as pubkey, thanks im silly thanks
<sipa>
:)
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