Bitcoin Wiki - User contributions [en]

Talk:Bitcoin.it Wiki Contributors' Award

2011-12-14T04:23:11Z

Na7coldwater:

Great idea! [[User:Gavinandresen|Gavinandresen]] (13:28, 19 December 2010 JST)

== typo correction ==

responsability -> responsibility.
i'd have done it myself but page is locked. :) [[User:Nanotube|Nanotube]] (02:24, 25 December 2010 JST)
:Fixed. [[User:MagicalTux|MagicalTux]] 18:18, 24 December 2010 (GMT)

based on the feedback their receive from users -> based on the feedback they receive from users
I'd also have fixed it if the page wasn't locked. [[User:Dooglus|Dooglus]] 21:45, 14 January 2011 (GMT)

== Am I too late? ==

I added my "contributers award participant" today (1st of February), will I be eligible? [[User:Ptd|Ptd]] 20:00, 1 February 2011 (GMT)

== the price is applied for translators too? ==

hi, I'm [[User:Shackra|Shackra]] and i'm making the Spanish version of [http://en.bitcoint.it en.bitcoin.it] in [http://es.bitcoin.it es.bitcoin.it] and i don't know if the price is applied to for translators (not only for Spanish version) because without translate version of this wiki the bitcoin system cant be accepted by other people :-|.

== Next Contributors Award: March 31st 2011 ==

Are there any updates on this? [[User:NilsB|NilsB]] 05:58, 10 June 2011 (GMT)
<br />
Same question; also, how do I set up a "user page" so I can apply for the contest? --[[User:Mondoman|Mondoman]] 02:21, 16 June 2011 (GMT)

== Contributor Template ==

I think that Contributors Award applications should be a userbox, something like the below:
<nowiki>{{User:Na7coldwater/Contributors_Award|BitcoinAddressHere}}</nowiki>
Which looks like this:
{{User:Na7coldwater/Contributors_Award|BitcoinAddressHere}}
<p style="clear:both">
I think this will look a lot nicer on userpages than the current method.

[[User:Na7coldwater|Na7coldwater]] 04:19, 26 October 2011 (GMT)
</p>

== Concerns ==

The award system may be vulnerable to address-jacking. Since any user can change any other user's profile (which is where the participant lists his or her Bitcoin address), there is no easy way to ensure that the award it truly granted to the intended recipient. --[[User:Sgornick|Sgornick]]

:The page says that the userpage history will be checked to ensure that the address the owner of the userpage posted will be used. --[[User:Na7coldwater|Na7coldwater]] 04:23, 14 December 2011 (GMT)

How to use the API, JSON-RPC

2011-10-29T01:19:24Z

Na7coldwater: Previous fix redirected to wrong page

#REDIRECT [[API reference (JSON-RPC)]]

How to use the API, JSON-RPC

2011-10-29T01:17:59Z

Na7coldwater: Fix double redirect

#REDIRECT [[API tutorial (JSON-RPC)]]

User:Na7coldwater/Contributors Award

2011-10-26T04:20:28Z

Na7coldwater: Made "Contributors Award" a link

<div style="float:left; border:1px solid #999; margin:1px;">
{| cellspacing="0" style="width:238px; background:#EEE;"
! style="width:45px; height:45px; background:#DDD; text-align:center; font-size:14pt; color:black; padding:0 1px 0 0; line-height:1.25em; vertical-align: middle;" {{!}} CA
| style="text-align:left; font-size:8pt; padding:0 4px 0 4px; height:45px; line-height:1.25em; color:black; vertical-align: middle;" | ''This user is eligible for the [[Bitcoin:Contributors Award|Contributors Award]]''
|}</div>

Talk:Bitcoin.it Wiki Contributors' Award

2011-10-26T04:19:19Z

Na7coldwater: /* Contributor Template */ new section

User:Na7coldwater/Contributors Award

2011-10-26T04:08:38Z

Na7coldwater: Created page with "<div style="float:left; border:1px solid #999; margin:1px;"> {| cellspacing="0" style="width:238px; background:#EEE;" ! style="width:45px; height:45px; background:#DDD; text-a..."

User:Na7coldwater

2011-10-26T03:49:15Z

Na7coldwater: Became eligible for the Contributors Award

Contributors Award participant: 1BTwWpmK66GxVuWzQqQe2McETCkwm2d2Li

I think that the above needs to be a template, something like
<nowiki>{{Contributors Award|BitcoinAddress}}</nowiki>

Proper Money Handling (JSON-RPC)

2011-10-26T03:40:44Z

Na7coldwater: Changed ECMAscript code to not create a global variable

== Overview ==
The original bitcoin client stores all bitcoin values as 64-bit integers, with 1 BTC stored as 100,000,000 (one-hundred-million of the smallest possible bitcoin unit). Values are expressed as double-precision Numbers in the JSON API, with 1 BTC expressed as 1.00000000

If you are writing software that uses the JSON-RPC interface you need to be aware of possible floating-point conversion issues. You, or the JSON library you are using, should convert amounts to either a fixed-point Decimal representation (with 8 digits after the decimal point) or ideally a 64-bit integer representation. In either case, rounding values is required.

Improper value handling can lead to embarrassing errors; for example, if you truncate instead of doing proper rounding and your software will display the value "0.1 BTC" as "0.09999999 BTC" (or, worse, "0.09 BTC").

The original bitcoin client does proper, full-precision rounding for all values passed to it via the RPC interface. So, for example, if the value 0.1 is converted to the value "0.099999999999" by your JSON-RPC library, that value will be rounded to the nearest 0.00000001 bitcoin and will be treated as exactly 0.1 bitcoins.

The rest of this page gives sample code for various JSON libraries and programming languages.

== BASH ==
<source lang="bash">
function JSONtoAmount() {
printf '%.8f' "$1" | tr -d '.'
}
</source>

== C/C++ ==
C/C++ JSON libraries return the JavaScript Number type as type 'double'. To convert, without loss of precision, from a double to a 64-bit integer multiply by 100,000,000 and round to the nearest integer:
int64_t JSONtoAmount(double value) {
return (int64_t)(value * 1e8 + (value < 0.0 ? -.5 : .5));
}

To convert to a JSON value divide by 100,000,000.0, and make sure your JSON implementation outputs doubles with 8 or more digits after the decimal point:
double forJSON = (double)amount / 1e8;

== ECMAScript ==

function JSONtoAmount(value) {
return Math.round(1e8 * value);
}

== Perl ==
sub JSONtoAmount {
return sprintf '%.0f', 1e8 * shift;
}

== PHP ==
function JSONtoAmount($value) {
return round($value * 1e8);
}

== Python ==
def JSONtoAmount(value):
return long(round(value * 1e8))
def AmountToJSON(amount):
return float(amount / 1e8)

== Common Lisp ==
(defun json-to-amount (n)
(coerce (round (* n 1e8)) 'integer))

'''CAUTION''': The CL-JSON library parses numbers as ''single'' precision floating-point by
default. The default parsing behavior can be overridden as follows:

(set-custom-vars :real (lambda (n)
(json::parse-number (concatenate 'string n "d0"))))
[[Category:Technical]]
[[Category:Developer]]