proc/worker/agent.go
func (w *Worker) AgentPreOfferingMsgBCPublish(job *data.Job) error {
	logger := w.logger.Add("method", "AgentPreOfferingMsgBCPublish",
		"job", job)
	offering, err := w.relatedOffering(logger, job,
		data.JobAgentPreOfferingMsgBCPublish)
	if err != nil {
		return err
	}

	minDeposit := data.MinDeposit(offering)

	agent, err := w.account(logger, offering.Agent)
	if err != nil {
		return err
	}

	agentKey, err := w.key(logger, agent.PrivateKey)
	if err != nil {
		return err
	}

	product, err := w.productByPK(logger, offering.Product)
	if err != nil {
		return err
	}

	offering.Country = country.UndefinedCountry

	if product.Country != nil && len(*product.Country) == 2 {
		offering.Country = *product.Country
	}

	publishData, err := w.publishData(logger, job)
	if err != nil {
		return err
	}

	offeringHash, err := data.HexToBytes(offering.Hash)
	if err != nil {
		return err
	}

	auth := bind.NewKeyedTransactor(agentKey)

	pscBalance, err := w.ethBack.PSCBalanceOf(&bind.CallOpts{}, auth.From)

	if err != nil {
		logger.Error(err.Error())
		return ErrPSCReturnBalance
	}

	totalDeposit := minDeposit * uint64(offering.Supply)
	if uint64(pscBalance) < totalDeposit {
		return ErrInsufficientPSCBalance
	}

	ethAmount, err := w.ethBalance(logger, auth.From)
	if err != nil {
		return err
	}

	wantedEthBalance := auth.GasLimit * publishData.GasPrice
	if wantedEthBalance > ethAmount.Uint64() {
		return ErrInsufficientEthBalance
	}

	auth.GasLimit = w.gasConf.PSC.RegisterServiceOffering
	auth.GasPrice = new(big.Int).SetUint64(publishData.GasPrice)

	if w.torHostName == "" {
		return ErrTorNoSet
	}

	offering.SOMCType = data.OfferingSOMCTor
	offering.SOMCData = w.torHostName

	tx, err := w.ethBack.RegisterServiceOffering(auth,
		[common.HashLength]byte(common.BytesToHash(offeringHash)),
		uint64(minDeposit), offering.Supply,
		offering.SOMCType, offering.SOMCData)
	if err != nil {
		logger.Add("GasLimit", auth.GasLimit,
			"GasPrice", auth.GasPrice).Error(err.Error())
		return ErrPSCRegisterOffering
	}

	offering.Status = data.OfferRegistering
	if err = w.db.Update(offering); err != nil {
		logger.Error(err.Error())
		return ErrInternal
	}

	return w.saveEthTX(logger, job, tx, "RegisterServiceOffering",
		job.RelatedType, job.RelatedID, agent.EthAddr,
		data.HexFromBytes(w.pscAddr.Bytes()))
}
func (w *Worker) AgentPreOfferingMsgBCPublish(job *data.Job) error {
	logger := w.logger.Add("method", "AgentPreOfferingMsgBCPublish",
		"job", job)
	offering, err := w.relatedOffering(logger, job,
		data.JobAgentPreOfferingMsgBCPublish)
	if err != nil {
		return err
	}

	minDeposit := data.MinDeposit(offering)

	agent, err := w.account(logger, offering.Agent)
	if err != nil {
		return err
	}

	agentKey, err := w.key(logger, agent.PrivateKey)
	if err != nil {
		return err
	}

	product, err := w.productByPK(logger, offering.Product)
	if err != nil {
		return err
	}

	offering.Country = country.UndefinedCountry

	if product.Country != nil && len(*product.Country) == 2 {
		offering.Country = *product.Country
	}

	publishData, err := w.publishData(logger, job)
	if err != nil {
		return err
	}

	offeringHash, err := data.HexToBytes(offering.Hash)
	if err != nil {
		return err
	}

	auth := bind.NewKeyedTransactor(agentKey)

	pscBalance, err := w.ethBack.PSCBalanceOf(&bind.CallOpts{}, auth.From)

	if err != nil {
		logger.Error(err.Error())
		return ErrPSCReturnBalance
	}

	totalDeposit := minDeposit * uint64(offering.Supply)
	if uint64(pscBalance) < totalDeposit {
		return ErrInsufficientPSCBalance
	}

	ethAmount, err := w.ethBalance(logger, auth.From)
	if err != nil {
		return err
	}

	wantedEthBalance := auth.GasLimit * publishData.GasPrice
	if wantedEthBalance > ethAmount.Uint64() {
		return ErrInsufficientEthBalance
	}

	auth.GasLimit = w.gasConf.PSC.RegisterServiceOffering
	auth.GasPrice = new(big.Int).SetUint64(publishData.GasPrice)

	if w.torHostName == "" {
		return ErrTorNoSet
	}

	offering.SOMCType = data.OfferingSOMCTor
	offering.SOMCData = w.torHostName

	tx, err := w.ethBack.RegisterServiceOffering(auth,
		[common.HashLength]byte(common.BytesToHash(offeringHash)),
		uint64(minDeposit), offering.Supply,
		offering.SOMCType, offering.SOMCData)
	if err != nil {
		logger.Add("GasLimit", auth.GasLimit,
			"GasPrice", auth.GasPrice).Error(err.Error())
		return ErrPSCRegisterOffering
	}

	offering.Status = data.OfferRegistering
	if err = w.db.Update(offering); err != nil {
		logger.Error(err.Error())
		return ErrInternal
	}

	return w.saveEthTX(logger, job, tx, "RegisterServiceOffering",
		job.RelatedType, job.RelatedID, agent.EthAddr,
		data.HexFromBytes(w.pscAddr.Bytes()))
}
// AgentPreOfferingMsgBCPublish publishes offering to blockchain.