Go SDK
Usage Examples
This section includes some examples of how to use Go SDK:
Get a Deploy from the Network
package main
import (
"context"
"fmt"
"net/http"
"github.com/make-software/casper-go-sdk/casper"
)
func main() {
handler := casper.NewRPCHandler("https://<Node Address and Port>/rpc", http.DefaultClient)
client := casper.NewRPCClient(handler)
deployHash := "62972eddc6fdc03b7ec53e52f7da7e24f01add9a74d68e3e21d924051c43f126"
deploy, err := client.GetDeploy(context.Background(), deployHash)
if err != nil {
return
}
fmt.Println(deploy.Deploy.Hash)
}
Handle the Deploy Processed Event
package main
import (
"context"
"log"
"github.com/make-software/casper-go-sdk/sse"
)
func main() {
client := sse.NewClient("https://<Node Address and Port>/events")
defer client.Stop()
client.RegisterHandler(
sse.DeployProcessedEventType,
func(ctx context.Context, rawEvent sse.RawEvent) error {
deploy, err := rawEvent.ParseAsDeployProcessedEvent()
if err != nil {
return err
}
log.Printf("Deploy hash: %s", deploy.DeployProcessed.DeployHash)
return nil
})
lastEventID := 1234
client.Start(context.TODO(), lastEventID)
}
Sending a Transfer
package main
import (
"context"
"encoding/hex"
"log"
"math/big"
"net/http"
"github.com/make-software/casper-go-sdk/casper"
"github.com/make-software/casper-go-sdk/types/clvalue"
)
func main() {
accountPublicKey, err := casper.NewPublicKey("012488699f9a31e36ecf002675cd7186b48e6a735d10ec1b308587ca719937752c")
if err != nil { return }
amount := big.NewInt(100000000)
session := casper.ExecutableDeployItem{
ModuleBytes: &casper.ModuleBytes{
ModuleBytes: hex.EncodeToString([]byte("<Contract WASM>")),
Args: (&casper.Args{}).
AddArgument("target", clvalue.NewCLByteArray(accountPublicKey.AccountHash().Bytes())).
AddArgument("amount", *clvalue.NewCLUInt512(amount)),
},
}
payment := casper.StandardPayment(amount)
deployHeader := casper.DefaultHeader()
deployHeader.Account = accountPublicKey
deployHeader.ChainName = "casper-test"
newDeploy, err := casper.MakeDeploy(deployHeader, payment, session)
handler := casper.NewRPCHandler("https://<Node Address>:7777/rpc", http.DefaultClient)
client := casper.NewRPCClient(handler)
result, err := client.PutDeploy(context.Background(), *newDeploy)
log.Println(result.DeployHash)
}