LiveCode Forums.

Posted: **Tue Mar 03, 2015 5:04 am**

Hi everyone. I am seeing a discrepancy in behavior of the shell function. I have not used the shell function for anything other than interacting with my bitcoin node, so it may be user error, but I don't think so.

In LiveCode versions up to and including 6.6.5 in Windows 7, this code:

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on NewKeyPair
   set the shellcommand to "c:\program files\bitcoin\daemon\bitcoin-cli.exe"
   put shell(getnewaddress) into  newAddy
   put "dumpprivkey"&&newAddy into PrivKeyDump
   put  shell(PrivKeyDump) into newPrivKey
   put "Address:"&&newAddy&cr&"Private Key:"&&newprivkey
end NewKeyPair

would correctly result in something like this:

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Address: 17AdYTMMRMxwACBevv5SLrHVs7PNfhhHnP

Private Key: KwXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXBEH

(example is not a real private key)

From LiveCode 6.7.x and 7.x.x the same script yields a result like this:

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Address: 1AWCPekoZwHz97rsdSTUDNw4a7QAn2emKr

Private Key: error: {"code":-32601,"message":"Method not found"}

After doing a bit of experimentation, and seeing as the first shell(getnewaddress) seems to be working fine in all versions, I am 99% certain that the problem is that the second shell function includes a space. All shell commands I've tried that do not have spaces work fine, commands that have a space return that error code. Anybody care to help test on this theory?

--Sefro

Forgive me if this is in the wrong area, or if it has been covered already. I've been absent the past couple of months and a quick search didn't turn up anything.

Posted: **Wed Mar 04, 2015 12:52 am**

Been a while since I've had to deal with Windows, but is there any reason you need an embedded space, i.e., would this work?

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   put  shell("dumpprivkey" && newAddy) into newPrivKey

Posted: **Wed Mar 04, 2015 4:57 am**

mwieder wrote:Been a while since I've had to deal with Windows, but is there any reason you need an embedded space, i.e., would this work?
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   put  shell("dumpprivkey" && newAddy) into newPrivKey

Unfortunately that does not work either. I tried every variation I could think of to include the space, including the one you suggested. Strangely, I am not not so sure the problem is with the space anymore, because if use use the default cmd.exe as my shellcommand, this works as expected:

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shell("mkdir c:\TestDirectory)

But any of my bitcoin-cli shell commands that include a space throw an error in all versions beyond 6.6.5.

--Sefro

Posted: **Wed Mar 04, 2015 5:32 am**

I haven't explicitly set the shellcommand... how about if you just use the long address of the tool?

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on NewKeyPair
   put "c:/program files/bitcoin/daemon/bitcoin-cli.exe" into tCmd
   put shell(tCmd && getnewaddress) into  newAddy
   put "dumpprivkey"&&newAddy into PrivKeyDump
   put  shell(tCmd && PrivKeyDump) into newPrivKey
   put "Address:"&&newAddy&cr&"Private Key:"&&newprivkey
end NewKeyPair

Posted: **Wed Mar 04, 2015 7:09 am**

That threw an error for both shell commands, but the slight edit below got it working in 6.7 and up:

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put quote &"c:\program files\bitcoin\daemon\bitcoin-cli.exe"& quote into tCmd

Any idea why my script would be working in previous versions, but not beyond 6.6.5? Would this be considered a bug, or is there some underlying problem with my script, that previous versions of LC were perhaps just more forgiving with?

Either way, thanks for your help!

--Sefro

EDIT: maybe the issue is with the shellcommand property, and not the shell function....

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