Golang support for custom u128 types

Author: danielgranhao

crates/breez-sdk/common/uniffi.toml

@@ -34,3 +34,12 @@ from_custom = "str({})"
 typeName = "bigint"
 intoCustom = "BigInt({})"
 fromCustom = "{}.toString()"
+
+[bindings.go.custom_types.common_u128]
+type_name = "*big.Int"
+imports = [ "math/big" ]
+into_custom = """
+result, _ := new(big.Int).SetString({}, 10)
+return result
+"""
+from_custom = "{}.String()"

crates/breez-sdk/core/uniffi.toml

@@ -34,3 +34,12 @@ from_custom = "str({})"
 typeName = "bigint"
 intoCustom = "BigInt({})"
 fromCustom = "{}.toString()"
+
+[bindings.go.custom_types.u128]
+type_name = "*big.Int"
+imports = [ "math/big" ]
+into_custom = """
+result, _ := new(big.Int).SetString({}, 10)
+return result
+"""
+from_custom = "{}.String()"

docs/breez-sdk/snippets/go/getting_started.go

@@ -65,10 +65,11 @@ func InitSdkAdvanced() (*breez_sdk_spark.BreezSdk, error) {
 
 func FetchBalance(sdk *breez_sdk_spark.BreezSdk) error {
 	// ANCHOR: fetch-balance
+	ensureSynced := false
 	info, err := sdk.GetInfo(breez_sdk_spark.GetInfoRequest{
 		// EnsureSynced: true will ensure the SDK is synced with the Spark network
 		// before returning the balance
-		EnsureSynced: false,
+		EnsureSynced: &ensureSynced,
 	})
 
 	if sdkErr := err.(*breez_sdk_spark.SdkError); sdkErr != nil {

docs/breez-sdk/snippets/go/lightning_address.go

@@ -12,7 +12,7 @@ func ConfigLightningAddress() *breez_sdk_spark.Config {
 	config.ApiKey = &apiKey
 	config.LnurlDomain = &lnurlDomain
 	// ANCHOR_END: config-lightning-address
-	return config
+	return &config
 }
 
 func CheckLightningAddressAvailability(sdk *breez_sdk_spark.BreezSdk) (bool, error) {
@@ -39,7 +39,7 @@ func RegisterLightningAddress(sdk *breez_sdk_spark.BreezSdk) (*breez_sdk_spark.L
 	// ANCHOR: register-lightning-address
 	request := breez_sdk_spark.RegisterLightningAddressRequest{
 		Username:    username,
-		Description: description,
+		Description: &description,
 	}
 
 	addressInfo, err := sdk.RegisterLightningAddress(request)
@@ -51,7 +51,7 @@ func RegisterLightningAddress(sdk *breez_sdk_spark.BreezSdk) (*breez_sdk_spark.L
 	_ = addressInfo.Lnurl
 	// ANCHOR_END: register-lightning-address
 
-	return addressInfo, nil
+	return &addressInfo, nil
 }
 
 func GetLightningAddress(sdk *breez_sdk_spark.BreezSdk) (*breez_sdk_spark.LightningAddressInfo, error) {

docs/breez-sdk/snippets/go/receive_payment.go

@@ -78,7 +78,7 @@ func WaitForPayment(sdk *breez_sdk_spark.BreezSdk, paymentRequest string) (*bree
 	// Wait for a payment to be completed using a payment request
 	request := breez_sdk_spark.WaitForPaymentRequest{
 		Identifier: breez_sdk_spark.WaitForPaymentIdentifierPaymentRequest{
-			PaymentRequest: paymentRequest,
+			Field0: paymentRequest,
 		},
 	}
 
@@ -88,7 +88,7 @@ func WaitForPayment(sdk *breez_sdk_spark.BreezSdk, paymentRequest string) (*bree
 		return nil, err
 	}
 
-	log.Printf("Payment received with ID: %v", response.payment.Id)
+	log.Printf("Payment received with ID: %v", response.Payment.Id)
 	// ANCHOR_END: wait-for-payment
-	return &response.payment, nil
+	return &response.Payment, nil
 }

docs/breez-sdk/snippets/go/send_payment.go

@@ -2,6 +2,7 @@ package example
 
 import (
 	"log"
+	"math/big"
 
 	"github.com/breez/breez-sdk-spark-go/breez_sdk_spark"
 )
@@ -10,11 +11,11 @@ func PrepareSendPaymentLightningBolt11(sdk *breez_sdk_spark.BreezSdk) (*breez_sd
 	// ANCHOR: prepare-send-payment-lightning-bolt11
 	paymentRequest := "<bolt11 invoice>"
 	// Optionally set the amount you wish the pay the receiver
-	optionalAmountSats := uint64(5_000)
+	optionalAmountSats := new(big.Int).SetInt64(5_000)
 
 	request := breez_sdk_spark.PrepareSendPaymentRequest{
 		PaymentRequest: paymentRequest,
-		AmountSats:     &optionalAmountSats,
+		Amount:         &optionalAmountSats,
 	}
 	response, err := sdk.PrepareSendPayment(request)
 
@@ -40,11 +41,11 @@ func PrepareSendPaymentOnchain(sdk *breez_sdk_spark.BreezSdk) (*breez_sdk_spark.
 	// ANCHOR: prepare-send-payment-onchain
 	paymentRequest := "<bitcoin address>"
 	// Set the amount you wish the pay the receiver
-	amountSats := uint64(50_000)
+	amountSats := new(big.Int).SetInt64(50_000)
 
 	request := breez_sdk_spark.PrepareSendPaymentRequest{
 		PaymentRequest: paymentRequest,
-		AmountSats:     &amountSats,
+		Amount:         &amountSats,
 	}
 	response, err := sdk.PrepareSendPayment(request)
 
@@ -71,11 +72,11 @@ func PrepareSendPaymentSpark(sdk *breez_sdk_spark.BreezSdk) (*breez_sdk_spark.Pr
 	// ANCHOR: prepare-send-payment-spark
 	paymentRequest := "<spark address>"
 	// Set the amount you wish the pay the receiver
-	amountSats := uint64(50_000)
+	amountSats := new(big.Int).SetInt64(50_000)
 
 	request := breez_sdk_spark.PrepareSendPaymentRequest{
 		PaymentRequest: paymentRequest,
-		AmountSats:     &amountSats,
+		Amount:         &amountSats,
 	}
 	response, err := sdk.PrepareSendPayment(request)
 
@@ -86,7 +87,7 @@ func PrepareSendPaymentSpark(sdk *breez_sdk_spark.BreezSdk) (*breez_sdk_spark.Pr
 	// If the fees are acceptable, continue to create the Send Payment
 	switch paymentMethod := response.PaymentMethod.(type) {
 	case breez_sdk_spark.SendPaymentMethodSparkAddress:
-		feeSats := paymentMethod.FeeSats
+		feeSats := paymentMethod.Fee
 		log.Printf("Fees: %v sats", feeSats)
 	}
 	// ANCHOR_END: prepare-send-payment-spark