Documentation of ecrecover

[graup]

It would be nice if the documentation would explain the parameters and maybe give an example on how you would use this function.

http://solidity.readthedocs.io/en/latest/units-and-global-variables.html#mathematical-and-cryptographic-functions

[Denton-L]

For now, take a look at this. Hopefully it'll tide you over until I can properly document this.

[Denton-L]

@VoR0220, do you think this should be explicitly stated in these docs or is a quick link to the web3 docs sufficient?

[chriseth]

It does not hurt to mention it explicitly.

[chriseth]

Also either mention or fix the "invalid input" bug for ecrecover.

[Denton-L]

@chriseth, what is this "invalid input" bug?

[axic]

Perhaps including (a link to) https://gist.github.com/axic/5b33912c6f61ae6fd96d6c4a47afde6d could be useful.

[graup]

I wish the code @axic posted was part of the standard library. Without it ecrecover is pretty useless to the normal developer.

[jackliu8722]

when i use the function ecrecover in solidity, there is something wrong , which i can not get the right result?

[clowdrgn]

There is a wrong answer when I use ecrecover,the address always be different.but when I use personal_ecRecover,it's right. Is there something different between those two method? I have try those method upstair,web3.eth.sign has the same result with personal.sign.but can't pass solidity ecrecover method too.

[danmermel]

Hello, apologies if this is not the correct place to comment on this (and please direct me elsewhere if necessary), but I am having the same issue - following all the examples, including the one linked to from here #2151 , I am unable to get ecrecover to work as documented (i.e. it does not return the signing address). I have posted a more detailed question here https://ethereum.stackexchange.com/questions/15364/totally-baffled-by-ecrecover with details of what I am doing. Can anyone explain what may be wrong?
Thanks!