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Snak is a Hyperledger Burrow’s tools, which provides some facilities to compile, deploy and test smart contracts and send transactions to the Burrow. With Snack you can easily install and uninstall Burrow (currently only for Darwin and Ubuntu 16.04 amd64) and easily launch a Burrow test network.(Updated for Hyperledger Burrow v0.18.0)

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Snack


Updated for Hyperledger Burrow v0.18.0 This document has inspired by truffle README.md

Snak is a node.js app which already is under development, aiming to facilitate working with hyperledger Burrow without using Monax.

with snak you will have these facilities:

  • Easily install and uninstall hyperledger burrow.
  • Built-in smart contract compilation, linking, deployment.
  • Having interaction with blockchain(Burrow) directly via linux terminal.
  • Automated contract testing with Mocha and Chai(will be added in future).
  • Network management for deploying to many public & private networks.
  • Interactive console for direct contract communication(will be added in future).

Install

$ npm install -g snak

Quick Usage

Install Burrow
(for now only Ubuntu 16.04 amd64 and Darwin are supported)
will copy Burrow necessary files in the '$HOME/burrow' 

$ snak install_burrow
This command will install hyperledger burrow on the $/HOME/burrow and by default use the http://localhost:1337/rpc.
You can find a predefined accounts on this directory.
Uninstall Burrow
This command will delete the '$HOME/burrow'

 $ snak uninstall_burrow
 
Run Burrow

 $ snak run_burrow
 This command at first run the Monax_keys on the default port and then will run the Burrow.
 Please be sure that before running Burrow, import the keys  which already are located in the burrow installation directory.
 $ snak import_keys $HOME/burrow/account_list.json
 
Send random transaction
$ snak rtx <count>

This command uses the pre-defined acounts to send the random amount transactions between these accounts! 
Send transaction

$ snak send <priv_key> <address> <fee> 

For a default set of contracts and tests, run the following within an empty project directory:

Initialize project:

$ snak init

From there, you can run snak compile, snak migrate and snak test(will be implemented in future) to compile your contracts, deploy those contracts to the network, and run their associated unit tests.

Compile smart contracts:

$ snak compile

it will compile all the contracts which are already inside the contract folder and makes the Bytecodes and ABIs and put them in the build directory.
Deploy smart contracts:

$ snak migrate [accountname]

[accountname] is optional, if you do not want to use default account you can save your account in a standard account json file in the accounts folder and name it 'account.json'.

Be sure you launch the Burrow using $snak run_burrow and put all contracts on the contract folder before running these commands.

Call smart contract's functions:

$ snak call <contract_name> <function_name> <parameters_list>

The parameters are pretty clear the only thing you need to care is parameters_list, its formar must be like this:   var1,var2,...,varK (comma separated)

  List of all commands:

    -V, --version                                                output the version number
    -h, --help                                                   output usage information

  Commands:

    init|int                                                     
    Initialize project, makes folders and files which are needed for starting a dapp project.
    
    
    compile|cmp                                                  
    Compile all contracts in contracts folder and makes artifacts in the build folder  
    you need to initialize a project before using this command.
    
    
    migrate|mgt [accountname]                                    
    deploy contract on the Burrow  
    you need to initialize a project before using this command.
    
    
    list_accounts|acnt                                           
    Load all accounts  
    you need to initialize a project before using this command.
    
    
    default_accounts|acnt                                        
    List all predefined accounts  
    No need to initialize a project before using this command.
    
    
    create_account|crtac <pass_phrase>                           
    Creates unsafe account included private key, public key and address and displays on the terminal,   
    No need to initialize a project before using this command.
    
    
    balance|blnc <address>                                       
    Get balance of a specefic account  
    No need to initialize a project before using this command.
    
    
    transact|tx <priv_key> <data> <address> <fee> <gas_limit>    
    Do regular transaction to a contract, you need pass the private key of sender and address of contract  
    you need to initialize a project before using this command.
    
    
    send|snd <priv_key> <address> <fee>                          
    Do regular transaction, you need pass the private key of sender and address of reciever  
    you need to initialize a project before using this command.
    
    
    random_transact|rtx <count>                                  
    Doing random Transaction,   
    you need to initialize a project before using this command  
    you should put a list of accounts(name = account_list.json) in accounts folder first!.
    
    
    install_burrow|insl                                          
    install burrow blockchain, and copy the files to the home directory (.burrow),   
    No need to initialize project for this command.
    
    
    uninstall_burrow|unsl                                        
    uninstall burrow blockchain, and back up the files to the home directory (burrow-backup),   
    No need to initialize project for this command.
    
    
    run_burrow|rnbrw                                             
    run burrow blockchain,you need install burrow first!,   
    No need to initialize project for this command.
    
    
    *
    call|calf <contract_name> <function_name> <parameters_list>  
    Calls the function of specefic contract, you need to pass the list of parameters like this var1,var2,...,varK ,comma    separated.  
    You need to initialize a project before using this command.
    
    
    run_monax_keys|rks [ip_address]                              
    Runs the Monax key server on port 4776,   
    No need to initialize a project before using this command.
    
    
    import_keys|imks <file_name>                                 
    Import keys in the monax key server  
    No need to initialize a project before using this command.
    
    
    chain_id|chid                                                
    Get chain id of the blockchain  
    You need to initialize a project before using this command.
    
    
    genesis_hash|genhash                                         
    Get Genesis Hash of the blockchain  
    You need to initialize a project before using this command.
    
    
    latest_block_height|lbckh                                    
    Get Latest Block Hash of the blockchain  
    You need to initialize a project before using this command.
    
    
    info|inf                                                     
    Get Info of the blockchain  
    You need to initialize a project before using this command.
    
    
    latest_block|lbck                                            
    Get Latest Block of the blockchain  
    You need to initialize a project before using this command.
    
    
    config|conf                                                  
    Get the current config of the snak  
    If you haven't created any project burrow url will be http://127.0.0.1:1337/rpc by default  
    You may need to initialize a project before using this command.

Example :

  • Calculator
pragma solidity 0.4.18;

contract Calculator {

    function Sum(int x1, int x2) public pure returns(int) {

        return (x1 + x2);
    }

    function Mul(int x1, int x2) public pure returns(int) {

        return (x1 * x2);
    }

    function Div(int x1, int x2) public pure returns(int) {

        return (x1 / x2);
    }

    function Sub(int x1, int x2) public pure returns(int) {

        return (x1 - x2);
    }

}

ahmad@blockchain:~/projects/calculator$ snak compile

[ '/home/ahmad/projects/calculator/contracts/Calculator.sol' ]
Compiling ./contracts/Calculator.sol...
Compile finished successfully!!!
Artifacts have been created successfully!!!

ahmad@blockchain:~/projects/calculator$ snak migrate

1)Calculator  :  

6060604052341561000f57600080fd5b6101d08061001e6000396000f300606060405260043610610062576000357c01000000000000000000000000000000000
00000000000000000000000900463ffffffff168063166dec531461006757806375aac69e146100a7578063eb638f12146100e7578063fa94904d14610127575b
600080fd5b341561007257600080fd5b6100916004808035906020019091908035906020019091905050610167565b60405180828152602001915050604051809
10390f35b34156100b257600080fd5b6100d16004808035906020019091908035906020019091905050610174565b604051808281526020019150506040518091
0390f35b34156100f257600080fd5b610111600480803590602001909190803590602001909190505061018a565b6040518082815260200191505060405180910
390f35b341561013257600080fd5b6101516004808035906020019091908035906020019091905050610197565b60405180828152602001915050604051809103
90f35b6000818303905092915050565b6000818381151561018157fe5b05905092915050565b6000818301905092915050565b60008183029050929150505600a
165627a7a723058207a1e93b6e5c4865a3bdbe8b35dc915a6e4d372e4f70c73338ff905d3f9e1f3c40029

Address : 28F6FCF5278157FF68476E9E165B6FDA406A4E10

Calculator has been successfully deployed! 

ahmad@blockchain:~/projects/calculator$ snak call Calculator Mul 12,10
"120"

Contributing

All contributions are welcome: use-cases, documentation, code, patches, bug reports, feature requests, etc.

License

MIT

About

Snak is a Hyperledger Burrow’s tools, which provides some facilities to compile, deploy and test smart contracts and send transactions to the Burrow. With Snack you can easily install and uninstall Burrow (currently only for Darwin and Ubuntu 16.04 amd64) and easily launch a Burrow test network.(Updated for Hyperledger Burrow v0.18.0)

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