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1  Bitcoin / Development & Technical Discussion / Pay to Script Hash on: November 11, 2017, 08:06:27 AM
For P2SH, i understand it lets the sender funds a transaction using 20 byte hash. The script supplied to redeem must hash to the scriptHash.

scriptPubKey: OP_HASH160 <scriptHash> OP_EQUAL
scriptSig: 0 <sig1> ... <script> OP_m <pubKey1> ... OP_n OP_CHECKMULTISIG

For this example, the processing is:

The checking process:
Stack   Script   Description
Empty.0 <sig1> <sig2> OP_2 <pubKey1> <pubKey2> <pubKey3> OP_3 OP_CHECKMULTISIG OP_HASH160 <scriptHash> OP_EQUAL   locking script combined with redeem script
0 <sig1> <sig2> OP_2 <pubKey1> <pubKey2> <pubKey3> OP_3   OP_CHECKMULTISIG OP_HASH160 <scriptHash> OP_EQUAL   Constants are added to the stack.
trueOP_HASH160 <scriptHash> OP_EQUAL   Signatures validated in the order of the keys in the script.

what happens after OP_CHECKMULTISIG, what value does OP_HASH160 hash to?

2  Bitcoin / Development & Technical Discussion / Pay to public key hash on: November 10, 2017, 03:35:59 PM
In P2PKH, the public key

scriptSig: <sig> <pubKey>

is the public key of the sender? the hash is from the sender public key? the signature is of the sender?
3  Bitcoin / Development & Technical Discussion / main() in bitcoin-tx.cpp on: November 08, 2017, 01:58:01 PM
I notice that is a main() function in bitcoin-tx.cpp. This main() is not the main function of bitcoin core. Because the main function is in bitcoind.cpp

So why there is a main() in bitcoin-tx.cpp ?
4  Bitcoin / Bitcoin Discussion / Simple bitcoin core tutorial on: November 05, 2017, 07:58:28 AM

I have created a simple bitcoin blog.

kindly criticise if you find any mistakes.

5  Bitcoin / Electrum / cannot build electrum from source on: July 03, 2017, 08:43:15 AM
when i build electrum from source, i get the following errors. How could i solve it? i use OS X sierra.

vic$ ARCHFLAGS="-arch i386 -arch x86_64" sudo python py2app --includes sip
running py2app
creating /Users/vic/Downloads/electrum/build/bdist.macosx-10.7-x86_64/python2.7-standalone/app
creating /Users/vic/Downloads/electrum/build/bdist.macosx-10.7-x86_64/python2.7-standalone/app/collect
creating /Users/vic/Downloads/electrum/build/bdist.macosx-10.7-x86_64/python2.7-standalone/app/temp
creating build/bdist.macosx-10.7-x86_64/python2.7-standalone/app/lib-dynload
creating build/bdist.macosx-10.7-x86_64/python2.7-standalone/app/Frameworks
/Users/vic/Downloads/electrum/.eggs/modulegraph-0.15-py2.7.egg/modulegraph/ UserWarning: No module named sip
/Users/vic/Downloads/electrum/.eggs/modulegraph-0.15-py2.7.egg/modulegraph/ UserWarning: No package named packages
6  Local / Bahasa Indonesia (Indonesian) / Bitcoin survey in Indonesia on: December 17, 2016, 01:31:10 AM
To the moderators:
Saya tidak meminta untuk bisnis. Jangan mencoret posting ini.

I am a mba student from thailand, please help me do the Bitcoin questionnaire. The data collected is used in thesis for academic purpose. I need 100 people from Indonesia to help me fill in the Bitcoin questionnaire. One of the first 100 people to do so will win a lucky draw price, USD$20 worth of Bitcoin. Thank you so much !

The USD$20 will be paid in Bitcoin.  (but the person must fill to the end of questionnaire)

(1) MBA Student: Victor Yeo
(2) My Institution : Kasetsart University
(3) Year of Study : 2016
(4) Subject Name: A survey of Bitcoin risk perception and Adoption
(5) Your Instructor : Nirundon Tapachai
(6) Your Research Topic : Bitcoin
(7) Purpose of the Survey: To understand Bitcoin adoption and risk perception from end user's perspective
7  Bitcoin / Bitcoin Discussion / [Help] Bitcoin survey in degree thesis on: July 14, 2016, 06:09:51 AM
Hi all,

As part of my mba thesis, I am doing a research on the adoption and perception of Bitcoin by e-commerce users.
This survey is anonymous and confidential, all data are only used for my study and will never be disclosed anywhere.

please tell me if any part of the questionnaire is not clear.

Thanks a lot guys! ^^

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