code: function composePowJoint(from_address, round_index, seed, deposit, solution, signer, callbacks){
  	var payload = {seed: seed, deposit:deposit, solution: solution};
  	var objMessage = {
  		app: "pow_equihash",
  		payload_location: "inline",
  		payload_hash: objectHash.getBase64Hash(payload),
  		payload: payload
  	};
  	composeJoint({
  		paying_addresses: [from_address],
  		outputs: [{address: from_address, amount: 0}],
  		messages: [objMessage],
  		round_index: round_index,
  		pow_type: constants.POW_TYPE_POW_EQUHASH,
  		signer: signer,
  		callbacks: callbacks
  	});
  }
docs: pow add pow joint