Class: Web3

Inherits:
Object
  • Object
show all
Includes:
EthCalls, NetCalls, PersonalCalls, ShhCalls, TxpoolCalls, Web3Calls
Defined in:
lib/web3.rb

Constant Summary collapse

@@jsonrpc = 
"2.0"
@@debug = 
ENV["ETH_DEBUG"] || false

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(endpoint = ENV["ETH_ENDPOINT"] || "http://localhost:8545", id = ENV["ETH_DEFAULT_CLIENT_ID"] || 999) ⇒ Web3

the default endpoint is localhost:8545 and default client id is 999 these can be set as envioronment variables - ETH_ENDPOINT and ETH_DEFAULT_CLIENT_ID



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# File 'lib/web3.rb', line 14

def initialize( endpoint = ENV["ETH_ENDPOINT"] || "http://localhost:8545",
                id = ENV["ETH_DEFAULT_CLIENT_ID"] || 999)
  @endpoint = endpoint
  @id = id
end

Instance Attribute Details

#address ⇒ Object

Returns the value of attribute address.



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# File 'lib/web3.rb', line 7

def address
  @address
end

#debug ⇒ Object

Returns the value of attribute debug.



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# File 'lib/web3.rb', line 7

def debug
  @debug
end

#endpoint ⇒ Object

Returns the value of attribute endpoint.



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# File 'lib/web3.rb', line 7

def endpoint
  @endpoint
end

#id ⇒ Object

Returns the value of attribute id.



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# File 'lib/web3.rb', line 7

def id
  @id
end

Instance Method Details

#do_request(method, params = [], id = @id) ⇒ Object

this is the method responsible for communicating with the endpoint it gets called by all the action-specific methods



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# File 'lib/web3.rb', line 22

def do_request(method, params = [], id = @id)
  request_json = { :jsonrpc => @@jsonrpc,
             :method => method,
             :params => params,
             :id => @id
           }.to_json

  if @@debug
    puts "Request to " + @endpoint + ": " + request_json + "  ...."
  end

  response = HTTParty.post(@endpoint,
      :body => request_json,
      :headers => { 'Content-Type' => 'application/json' } )

  if @@debug
    puts "Response: " + response.to_s()
  end

  if response.bad_gateway?
    raise "Unable to connect to JSON-RPC endpont" + @endpoint
  end

  if !response.success?
    raise "JSON-RPC endpoint " + @endpoint + " returned http code " + response.code.to_s()
  end

  if response["error"]
    code = response["error"]["code"]
    message = response["error"]["message"]
    raise "In response to " + method + " request, JSON-RPC endpoint returned error #" + code.to_s() + ": " + message
  end
  response
end

#ether_to_0xwei(ether) ⇒ Object

Converts either to wei a hex-formatted string, including the 0x indicator



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# File 'lib/web3.rb', line 121

def ether_to_0xwei(ether)
  to_0x(ether_to_wei(ether))
end

#ether_to_wei(ether) ⇒ Object

Converts either to wei



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# File 'lib/web3.rb', line 116

def ether_to_wei(ether)
  (ether * 10**18).round()
end

#sendEther(from_address, to_address, ether, password) ⇒ Object

Convenience function to simply send ether from one account to another, using the default gas settings. This requires the personal api to be active. See github.com/ethereum/go-ethereum/wiki/Management-APIs



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# File 'lib/web3.rb', line 128

def sendEther(from_address, to_address, ether, password)
  trans = {}
  trans["from"] = from_address
  trans["to"] = to_address
  trans["value"] = ether_to_0xwei(ether)
#    if gas != nil

#        trans["gas"] = to_hex(gas) #should this to_hex or to_0x?

#    end

#    if gasPrice != nil

#      trans["gasPrice"] = to_hex(gasPrice)

#    end

  personal_signAndSendTransaction(trans, password)
end

#to_0x(decimal) ⇒ Object

Converts a decimal integer to a hex string that starts with a 0x marker



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# File 'lib/web3.rb', line 106

def to_0x(decimal)
  "0x" + to_hex(decimal)
end

#to_decimal(hex) ⇒ Object

Converts a hex string or int to a decimal integer



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# File 'lib/web3.rb', line 83

def to_decimal(hex)
  if hex == nil
    return nil
  end
  if hex.is_a?(Integer)
    return hex
  end
  hex.to_i(16)
end

#to_hex(decimal) ⇒ Object

Converts a decimal integer to a hex string



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# File 'lib/web3.rb', line 94

def to_hex(decimal)
  if decimal == nil
    return nil
  end
  if decimal.is_a?(String)
    return decimal
  end
  decimal.to_s(16) #this will throw an error if a non-integer is used

end

#wei_to_ether(wei) ⇒ Object

Converts wei to ether



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# File 'lib/web3.rb', line 111

def wei_to_ether(wei)
  1.0 * wei / 10**18
end