Merge pull request #24 from gateway-fm/API-222

API-222: GetAvailableMargin

perpsv3.go

@@ -111,6 +111,9 @@ type IPerpsv3 interface {
 	// GetFoundingRate is used to get current market founding rate by given market ID
 	GetFoundingRate(marketId *big.Int) (*big.Int, error)
 
+	// GetAvailableMargin is used to get available margin for given account ID
+	GetAvailableMargin(accountId *big.Int) (*big.Int, error)
+
 	// FormatAccount is used to get account, and it's additional data from the contract by given account id
 	FormatAccount(id *big.Int) (*models.Account, error)
 
@@ -229,6 +232,10 @@ func (p *Perpsv3) GetFoundingRate(marketId *big.Int) (*big.Int, error) {
 	return p.service.GetFoundingRate(marketId)
 }
 
+func (p *Perpsv3) GetAvailableMargin(accountId *big.Int) (*big.Int, error) {
+	return p.service.GetAvailableMargin(accountId)
+}
+
 func (p *Perpsv3) FormatAccounts() ([]*models.Account, error) {
 	return p.service.FormatAccounts()
 }

services/accounts.go

@@ -63,6 +63,16 @@ func (s *Service) FormatAccounts() ([]*models.Account, error) {
 	return s.formatAccounts(opts)
 }
 
+func (s *Service) GetAvailableMargin(accountId *big.Int) (*big.Int, error) {
+	margin, err := s.perpsMarket.GetAvailableMargin(nil, accountId)
+	if err != nil {
+		logger.Log().WithField("layer", "").Errorf("get avaliable margin error: %v", err.Error())
+		return nil, errors.GetReadContractErr(err, "perps market", "GetAvailableMargin")
+	}
+
+	return margin, nil
+}
+
 // formatAccounts is used to get accounts from the contract using event filter function for 'AccountCreated' event
 // and given filter options
 func (s *Service) formatAccounts(opts *bind.FilterOpts) ([]*models.Account, error) {

services/service.go

@@ -70,6 +70,9 @@ type IService interface {
 	// GetFoundingRate is used to get current founding rate by given market ID
 	GetFoundingRate(marketId *big.Int) (*big.Int, error)
 
+	// GetAvailableMargin is used to get available margin for given account ID
+	GetAvailableMargin(accountId *big.Int) (*big.Int, error)
+
 	// FormatAccount is used to get account, and it's additional data from the contract by given account id
 	FormatAccount(id *big.Int) (*models.Account, error)