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Updated Comments:BIP 0174 (markdown)

Andrew Chow 2018-03-31 17:38:58 -04:00
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Comments:BIP-0174.md

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* Partial signature entries use the map key `{0x02}|{public key}`. However, a single public key may be involved in signing multiple inputs, and the signature will differ in each one. Since the map keys are to be unique, this is a problem. I suggest the following map key instead: `{0x02}|{input index}|{pubkey index}` * Partial signature entries use the map key `{0x02}|{public key}`. However, a single public key may be involved in signing multiple inputs, and the signature will differ in each one. Since the map keys are to be unique, this is a problem. I suggest the following map key instead: `{0x02}|{input index}|{pubkey index}`
* HD derivation entries waste space by repeating the public key. I recommend using the following map key instead: `{0x03}|{input index}|{pubkey index}`, which also matches previous point. * HD derivation entries waste space by repeating the public key. I recommend using the following map key instead: `{0x03}|{input index}|{pubkey index}`, which also matches previous point.
## In response to Dev Random from achow101
> However, a single public key may be involved in signing multiple inputs, and the signature will differ in each one. Since the map keys are to be unique, this is a problem.
Each input has its own partial signatures map; it isn't global.
> HD derivation entries waste space by repeating the public key. I recommend using the following map key instead: `{0x03}|{input index}|{pubkey index}`, which also matches previous point.
The hd keypaths (unlike the partial signatures map) is global. Public keys are not duplicated in the map.