code: function composeCoinbaseJoint(from_address, coinbase_address, round_index, coinbase_amount, signer, callbacks){
  	var coinbase_foundation_amount = Math.floor(coinbase_amount*constants.FOUNDATION_RATIO);
  	composeJoint({
  		paying_addresses: [from_address],
  		outputs: [{address: coinbase_address, amount: 0}, {address: constants.FOUNDATION_ADDRESS, amount: coinbase_foundation_amount}],
  		//inputs: [{type: "coinbase", amount: coinbase_amount, address: from_address}],
  		inputs: [{type: "coinbase", amount: coinbase_amount}],
  		round_index: round_index,
  		input_amount: coinbase_amount,
  		pow_type: constants.POW_TYPE_COIN_BASE,
  		signer: signer,
  		callbacks: callbacks
  	});
  }
docs: pow add Coinbase joint