I want to get the raw or hex version of a bitcoin block by its block number or block hash, but there seems to be no block explorer that does this.
I found an answer introducing this URL: https://www.blockchain.com/btc/block/8765?format=hex but it doesn't seem to work. particularly I want the raw or hex of block number 6425.
You can use the getblock command in bitcoin-core with the value 0 for verbosity.
You can try this in directly to a bitcoin-core console window, or use bitcoin-cli.
Example:
>getbestblockhash
27c9c0439b96b38a846f762e362607c9cd97605de8b293b3234eaf2869a4da9a
>getblock 27c9c0439b96b38a846f762e362607c9cd97605de8b293b3234eaf2869a4da9a 0
0000002076fe9fe0e4df326461fdddc3836cf220a8395c3c5c1b6fa372deb692ebf6f5732e7beb0de9ff1dd4853c203b120eb4caeeed1901aaf43de5a831c4dcdba50bc54070cf60ffff7f200000000001020000000001010000000000000000000000000000000000000000000000000000000000000000ffffffff03580101ffffffff0200f2052a010000001600146241cc8a5f1120019e0e0d8dca674d1f4f58b0ac0000000000000000266a24aa21a9ede2f61c3f71d1defd3fa999dfa36953755c690689799962b48bebd836974e8cf90120000000000000000000000000000000000000000000000000000000000000000000000000
For the block at height 6425, the raw block in hex is...
01000000a0d4ea3416518af0b238fef847274fc768cd39d0dc44a0ea5ec0c2dd000000007edfbf7974109f1fd628f17dfefd4915f217e0ec06e0c74e45049d36850abca4bc0eb049ffff001d27d0031e0101000000010000000000000000000000000000000000000000000000000000000000000000ffffffff0804ffff001d024f02ffffffff0100f2052a010000004341048a5294505f44683bbc2be81e0f6a91ac1a197d6050accac393aad3b86b2398387e34fedf0de5d9f185eb3f2c17f3564b9170b9c262aa3ac91f371279beca0cafac00000000
Blockchair has this api available: https://blockchair.com/api/docs#link_M31
Example for block 000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f
https://api.blockchair.com/bitcoin/raw/block/000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f
and see the raw_block field
Related
I'm trying to parse some .a2l and .hex files to extract variables and their values. So far l don't know how to find the values of the variables in the .hex file. Here is a link to download an example of these files.
To be more specific : How can I read the value at the address 0x810600 in the .hex file ?
/begin CHARACTERISTIC ASAM.C.DEPENDENT.REF_1.SWORD
"Dependent SWORD"
VALUE
0x810600
RL.FNC.SWORD.ROW_DIR
0
CM.IDENTICAL
-32268 32267
/begin DEPENDENT_CHARACTERISTIC
"X1 + 5"
ASAM.C.SCALAR.SBYTE.IDENTICAL
/end DEPENDENT_CHARACTERISTIC
DISPLAY_IDENTIFIER DI.ASAM.C.DEPENDENT.REF_1.SWORD
/end CHARACTERISTIC
In the same A2L, please find RL.FNC.SWORD.ROW_DIR item, I guess it might be kind of signed word (2 bytes) type.
I'm not sure if this is kind of array or some special type... I assume this is just single variable (scalar).
Again, find CM.IDENTICAL item, as it's name maybe it's identical compu_method. This means HEX value 0 -> displayed screen as 0, HEX value 100 -> displayed screen as 100, ... identical between internal value and physical value. No special conversion I guess.
Go to the address 0x810600 in HEX then you can find some values there. As it is identical compu_method type, the value in HEX might be identically displayed in M/C SW (INCA, Vision, CANape, ...) I guess.
HEX is of intel hex format. This format is used to map each part of the file to a part in virtual address space of device. You can also use the following command if you use Linux:
objdump -s file.hex
In my code, I found one qDebug()<<s; didn't output the content given to it. It's very strange, so I output s.length(). It says 135254, so I'm wondering whether there is a limitation of length which is shorter than 135254? I have read the source header and do not find the result.
i noticed something similar...
This might narrow it down a bit (using Qt 5.5.1 with Windows mingw):
45000 character trace did not show up in qDebug.
10000 character trace did show up in qDebug.
I was able to qDebug my 45000 characters as 5 separate qDebug calls, each was something like this:
qDebug()<<foo.mid(20000, 10000);
then piece them together in a text editor.
it may have been a little nicer to use qDebug's noQuotes feature too, but i don't need to run my script again today so I'm not prettying it up right now.
I'm trying to write my own code-editor, I figure its a good way to learn pyQt.
I am using a qtextedit, in which i can write code(it's not real code, more pseudo code).
Each line represents ending in a semi-colon represents some command
e.g.
PSEUDO->FWD->90;
PSEUDO->STOP;
PSEUDO->RIGHT 90;
PSEUDO->FWD 10;
These are relatively easy to read, as the user presses the [ENTER] the current line is read, parsed and checked for errors so the following
PSEUDO->RIGHT -pi/2
would generate an error because the line doesn't end in a semi-colon and the value following RIGHT needs to be a number.(my editor, my rules).All this I have more or less got working.
I would like to know how to do multiple lines though. I am familiar with editors such as Eclipse,sublime or visual studio which handle muliple lines very well, in my case
PSEUDO->DO:
FWD->90
RIGHT->45
FWD->10
LEFT->55
FWD->50
STOP;
Should all be read in and treated as one statement, starting at the keyword PSEUDO and ending at the semi-colon.
However the following should be read as 3 separate statements.
PSEUDO->DO:
FWD->90
RIGHT->45
FWD->10
LEFT->55
FWD->50
STOP;
PSEUDO->DO:
FWD->90
RIGHT->45
STOP;
PSEUDO->BACK 10;
My question how can I go about reading muliple lines as described above from QTextEditor as discreet statements.
Should I do the parse/check whenever I press the [ENTER] key for a new line?
I'm using python2.7,pyQT, and QTextEdit.
Basically what you are trying to do, can be done with all the text of the document and some regular expressions. I would be careful with this course, because it may slow things down.
So to stay lean and to use the right classes of Qt, I would use anything related to the Rich Text Processing, QTextDocument, and QTextCursor.
I have used QSyntaxHighlighter quite a bit, and QRegExp. There is now QRegularExpression, too. Here are the classes and general documentation I'd look at to get started with Rich Text processing.
http://doc.qt.io/qt-5/qtextblock.html#details
http://doc.qt.io/qt-5/richtext-structure.html
http://doc.qt.io/qt-5/richtext.html
http://doc.qt.io/qt-5/richtext-cursor.html
http://doc.qt.io/qt-5/richtext-common-tasks.html#finding-text
Hope that helps.
I try to use the like-Button and therefor the open graph.
My problem is, that "&" and "$" chars are always replaced by & and %24
Of course, thats the normal case, but I need a clean $ and no entity there, becuase otherwise the link is not working for this image.
I could see, that facebook´s raw output produces \u0024 and so on (seems to be XKBSymbols). But if I try to put this symbols in the link in my typo3 meta-tag, it doesnt work either.
I already tried:
#page.headerData.12345.htmlSpecialChars = 0
#page.headerData.12345.htmlSpecialChars.preserveEntities = 1
#page.headerData.12345.rawUrlEncode = 0
to solve this problem, but none of those work.
Please give me a useful hint.
Thanks
try to write to your php code trough htmlspecialchar php function and add it to header with
$GLOBALS['TSFE']->additionalHeaderData['somekey'] = '...'
I see console apps print colors and seen apps such as ffmpeg print text over itself instead of a new line. How do I print over an existing line? I want to display fps in my console app either at the very top or very bottom and have regular printfs go there and scroll normally.
I need this for windows, but this is meant to be cross platform, so I will eventually have a linux and mac implementation.
There is two simple possibilities which work on linux as well as windows, but only for one line:
printf("\b"); will return for one character, so you might count how many character you want to backspace and fire this in a loop, or you know that you only write n numbers and do it likeprintf("\b\b\b\b\b\b\b\b\b\b");
printf("text to be overwritten by next printf\r"); this will return the cursor to the beginning of the line, so any next printf will overwrite it. Make sure to write a string of same length or longer so you overwrite it entirely.
If you want to rewrite several lines, there is nothing so portable as ncurses, there is libs for it on practically every operating system, and you don't have to take care of the ANSI-differences.
edit: added link to ncurses wikipedia page, gives great overview and introduction, as well as link list and maybe a translation to your preferred language
Check out ncurses. It has bindings for most scripting languages.
You can use '\r' instead of '\n'.
The ASCII character number 8 (A.K.A. Ctrl-H, BS or Backspace) lets you back up one character. ASCII Character number 13 (A.K.A Ctrl-M, CR or Carriage Return) returns the cursor at the beggining of the line.
If you are working in C try putchar(8); and putchar(13);
The magic of the colors, cursor locating and bliking and so on are inside ANSI escape codes. Any text console capable of handling ANSI codes can use them just printing them out to console (i.e. by means of echo in a bash script or printf() function in C).
Unix terminals support ANSI escape sequences and Windows world used to support them back in old MS-DOS days, but the multibyte console support put an end to this. There is more information here. However there are other ways out of just ANSI sequences printing available on Windows. Moreover if you have Cygwin installed on your Windows maching ANSI codes work just as great as on any Unix terminal.
Many people mention Ncurses library that is the de-facto standard for any gui-like text based applications. What this library does is to hide all the terminal differences (Windows/Unix flavours) to represent the same information as identical as possible across all the platforms, though from my own experience I tell you this is not always true (i.e. typical text window frames change because the especial chars are not available under all character encodings). The counterpart of using ncurses is that it is a complete API and it is much harder to start out with it than simply writing out some ANSI escape sequences for simple things such as change the font color, cleaning screen or moving back the cursor to a random position.
For the sake of completeness I paste an example of use of ANSI sequence under Linux that changes the prompt to blue and shows the date:
PS1="\[\033[34m\][\$(date +%H%M)][\u#\h:\w]$ "
You can use Ncurses -
ncurses package is a subroutine library for terminal-independent screen-painting and input-event handling which presents a high level screen model to the programmer, hiding differences between terminal types and doing automatic optimization of output to change one screenfull of text into another
Depending on the platform which you are developing on there's probably a more powerful API which you could use, rather than old ASCII control codes.
e.g. If you are working on Win32 you can actually manipulate the console screen buffer directly.
A good place to start might be here
http://msdn.microsoft.com/en-us/library/ms683171(VS.85).aspx
I have been looking for similar functions/API which would allow me to access the console as something other than a stream of text for other platforms. Haven't found anything yet, but then again, I haven't been looking that hard.
Hope it helps.