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From: Jimmy Song <jaejoon@gmail.com>
Date: Thu, 3 Oct 2019 15:14:22 -0500
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Subject: [bitcoin-dev] PSBT global key for network
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Hey all,
I wanted to propose a new key in the global context for BIP174,
Partially-Signed Bitcoin Transactions.
= Rationale
Each signer should make sure that the inputs being referenced in the PSBT
exist (with the exception of a Proof-of-Reserves input). In order to do
this, it's critical to know which network the coins are on (mainnet or
testnet). This could potentially be extended to other networks should they
want to use something like PSBT, much in the same way that HD keys from
BIP0044 reserved 0' and 1' as coins for mainnet Bitcoin and testnet Bitcoin
respectively.
= Proposal
Add the key 0x03 for network in the global key-value store. Value is a
variable integer with 0x00 indicating Bitcoin mainnet and 0x01 indicating
Bitcoin testnet. Other coins that want to use the PSBT should use the coin
network number from SLIP-0044 with the high bit removed.
---------------------------
Best,
Jimmy
--000000000000e55b7f0594073b36
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr"><div>Hey all,</div><div><br></div><div>I wanted to propose=
a new key in the global context for BIP174, Partially-Signed Bitcoin Trans=
actions.</div><div><br></div><div>=3D Rationale</div><div><br></div><div>Ea=
ch signer should make sure that the inputs being referenced in the PSBT exi=
st (with the exception of a Proof-of-Reserves input). In order to do this, =
it's critical to know which network the coins are on (mainnet or testne=
t). This could potentially be extended to other networks should they want t=
o use something like PSBT, much in the same way that HD keys from BIP0044 r=
eserved 0' and 1' as coins for mainnet Bitcoin and testnet Bitcoin =
respectively.</div><div><br></div><div>=3D Proposal</div><div><br></div><di=
v>Add the key 0x03 for network in the global key-value store. Value is a va=
riable integer with 0x00 indicating Bitcoin mainnet and 0x01 indicating Bit=
coin testnet. Other coins that want to use the PSBT should use the coin net=
work number from SLIP-0044 with the high bit removed.</div><div><br></div><=
div>---------------------------</div><div><br></div><div>Best,</div><div><b=
r></div><div>Jimmy<br></div><div><br></div></div>
--000000000000e55b7f0594073b36--
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