I want to write a program for %subject%

The checkpoints are:
1) create raw signed transaction valid for BitcoinCash network which spends one
unspent p2pkh output (regular 1xxxx address) for another address (for example exchange deposit)

2) create raw signed transaction valid for BitcoinCash network which spends Coinbase
multisig 2-of-3 p2sh output ( 3xxxxx address ) for your exchange deposit address. Your regular
bitcoins remain in CoinBase account

3) a tool for pushing this transaction to BCC-network (I do not know public API for it today)

Are you interested in such tools? Do you want to test them? I think it will be ready in a couple of days.

Note: BCC-network has a strong protection against replay. Transactions for regular network
are not valid in BCC-network and vice versa. Claiming your BCC coins seems safe to your regular account.

a) can i download 0.13.1 and create segwit address for myself today?
b) can i fund this address today? (the answer is "yes", because this is regular p2sh address)
c) can i spend these funds from segwit address using 0.13.1 today before segwit activation?

[0x79]

I have some troubles with understanding bitcoin math.
For example, my private key is '2'
So, the public key should be (Gx,Gy) * 2
Gx = 0x79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798
So, Gx * 2 will be 0x79... + 0x79... = 0xf3... (I can calculate it in mind)
But the public key for '2' is 04C6047F9... (or 02C6047F9... in compressed form)
What is wrong with my calculations?
How to multiply the base point 0x79be66... by two and receive 0xC6047F9 ?

Hi.
I am looking for the list of most active bitcoin addresses
Here is http://btc.blockr.io/trivia/address top-100
Is there top-1k, top-10k etc?

(I do not need addresses with big balances! Only most used ones)

Look at this
https://blockchain.info/ru/address/155M7TvBRww6WFdtGQgTYUH8DuLheNafCf

tx chain:
d31b4d81641ae81ad71d371921af8dc5a6880f787f48220c58b220942df259fa ->
4156cc3456325e4206f891e3a5d1e2cc39b1b87bfb39d5fe6ca83d987197266e ->
98f9366ae3bcce4f325479ae567e0b1185557757acb6955076269c13acf93eaf ->
acb9322023da425c2054853b1a6e58a46f040b0fe48ddb771d26d1ec7bcf9c2d ->
fafac1f2b61e7cc3a4192f10c6ef0f0d698f477978afe4b5ce36e67d44b35844 -> ...

Just wasting space in blocks
Stop this automated and crazy script please!

Have a look
https://bitcointalk.org/index.php?topic=360347.0

Check the dates - the conversation was in December!

Can not get private key from WIF in testnet

lets take an example from http://wiki.betcoin.tm/List_of_address_prefixes

1) wif=cNJFgo1driFnPcBdBX8BrJrpxchBWXwXCvNH5SoSkdcF6JXXwHMm

2) decode base58

Code:

"04 1f 43 dd f4 a3 a4 d0 4a db 10 78 29 3d fa 68 " 
"4f 6c 63 e7 74 cd 6a 15 0b 7d 5a 42 e3 14 b3 b9 " 
"b0 08 da 65 22 bc " 

3) so "da 65 22 bc " - is a checksum , 04 - seems to be prefix
but the rest is 33 bytes instead of 32... hmmm

4) sha256 (sha256 ( these-bytes-without-checksum ) ) =

Code:

"ee 99 5b 68 34 ec 0e 82 5f 5a 4e 32 1f c2 53 e3 " 
"12 cd e9 4d ac 74 43 9b eb 0f d7 26 10 a3 ff 16 "

checksum error  
please help

PS. the same bad results with exported from official client
PPS. does the client always generate compressed wif-format for testnet? what about mainnet? I use 0.8.5