t4sk

## dsha256.md

      
              1 file
            
          
              0 forks
            
          
              0 comments
            
          
              0 stars
            
          
                t4sk
                / dsha256.md
            
            
              Last active
              January 8, 2017 23:54
            
              
                How to compute double sha256
              
          
    How compute double sha256

This example is from BIP 143 - Native P2WPKH
Compute double sha256
> export PREV_OUTS=fff7f7881a8099afa6940d42d1e7f6362bec38171ea3edf433541db4e4ad969f00000000ef51e1b804cc89d182d279655c3aa89e815b1b309fe287d9b2b55d57b90ec68a01000000
> echo -n $PREV_OUTS | xxd -r -p | openssl dgst -sha256 -binary | openssl dgst -sha256
96b827c8483d4e9b96712b6713a7b68d6e8003a781feba36c31143470b4efd37


## pubkey.md

      
              1 file
            
          
              0 forks
            
          
              1 comment
            
          
              0 stars
            
          
                t4sk
                / pubkey.md
            
            
              Created
              January 3, 2017 22:22
            
              
                How to get Public Key of a Bitcoin Address
              
          
    How to get Public Key of a Bitcoin Address

Generate bitcoin address
> getnewaddress
mkAhnkryoSs3dLWeBhbhJsw5d1LMs3B3Lt

Get public key
> validateaddress mkAhnkryoSs3dLWeBhbhJsw5d1LMs3B3Lt

  
## segwit-regtest.md

      
              1 file
            
          
              0 forks
            
          
              0 comments
            
          
              3 stars
            
          
                t4sk
                / segwit-regtest.md
            
            
              Created
              December 29, 2016 21:51
            
              
                How to activate segwit on regtest
              
          
    How to activate segwit on regtest

Start bitcoind
> bitcoind -regtest -daemon

Generate block chain
> bitcoin-cli -regtest generate 432


## regtest.md

      
              1 file
            
          
              1 fork
            
          
              0 comments
            
          
              2 stars
            
          
                t4sk
                / regtest.md
            
            
              Last active
              December 31, 2017 19:31
            
              
                How to get bitcoins for development using Regtest
              
          
    How to get bitcoins for development using Regtest

Start bitcoind
> bitcoind -regtest -daemon

Generate block chain
> bitcoin-cli -regtest generate 101


## bitcoin-tx.md

      
              1 file
            
          
              0 forks
            
          
              0 comments
            
          
              0 stars
            
          
                t4sk
                / bitcoin-tx.md
            
            
              Last active
              January 2, 2017 21:25
            
              
                Bitcoin transaction using bitcoin-qt console
              
          
    How to create transaction using bitcoin-qt console


Example of a transaction with single input and output

Start bitcoin-qt (on testnet)
bitcoin-qt -testnet

Open console

  
## simple_form_mdl_wrappers.rb
# Simple wrappers for Material Design Lite text fields to use with SimpleForm (Rails)

SimpleForm.setup do |config|

  config.wrappers :mdl_field, tag: 'div', class: 'mdl-textfield mdl-js-textfield', error_class: 'is-invalid' do |b|
    b.use :html5
    b.use :input, class: 'mdl-textfield__input'
    b.use :label, class: 'mdl-textfield__label'
    b.use :error, wrap_with: { tag: :span, class: "mdl-textfield__error" }
  end
	# Simple wrappers for Material Design Lite text fields to use with SimpleForm (Rails)

	SimpleForm.setup do \|config\|

	config.wrappers :mdl_field, tag: 'div', class: 'mdl-textfield mdl-js-textfield', error_class: 'is-invalid' do \|b\|
	b.use :html5
	b.use :input, class: 'mdl-textfield__input'
	b.use :label, class: 'mdl-textfield__label'
	b.use :error, wrap_with: { tag: :span, class: "mdl-textfield__error" }
	end