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n3client.go
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n3client.go
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package morph
import (
"context"
"errors"
"fmt"
"time"
"github.com/nspcc-dev/neo-go/pkg/core/state"
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
"github.com/nspcc-dev/neo-go/pkg/neorpc/result"
"github.com/nspcc-dev/neo-go/pkg/rpcclient"
"github.com/nspcc-dev/neo-go/pkg/rpcclient/actor"
"github.com/nspcc-dev/neo-go/pkg/rpcclient/invoker"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/wallet"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
// Client represents N3 client interface capable of test-invoking scripts
// and sending signed transactions to chain.
type Client interface {
invoker.RPCInvoke
GetBlockCount() (uint32, error)
GetContractStateByID(int32) (*state.Contract, error)
GetContractStateByHash(util.Uint160) (*state.Contract, error)
GetNativeContracts() ([]state.NativeContract, error)
GetApplicationLog(util.Uint256, *trigger.Type) (*result.ApplicationLog, error)
GetVersion() (*result.Version, error)
SendRawTransaction(*transaction.Transaction) (util.Uint256, error)
GetCommittee() (keys.PublicKeys, error)
CalculateNetworkFee(tx *transaction.Transaction) (int64, error)
}
type hashVUBPair struct {
hash util.Uint256
vub uint32
}
type clientContext struct {
Client Client // a raw neo-go client OR a local chain implementation
CommitteeAct *actor.Actor // committee actor with the Global witness scope
ReadOnlyInvoker *invoker.Invoker // R/O contract invoker, does not contain any signer
SentTxs []hashVUBPair
}
func getN3Client(v *viper.Viper) (*rpcclient.Client, error) {
// number of opened connections
// by neo-go client per one host
const (
maxConnsPerHost = 10
requestTimeout = time.Second * 10
)
ctx := context.Background()
endpoint := v.GetString(endpointFlag)
if endpoint == "" {
return nil, errors.New("missing endpoint")
}
c, err := rpcclient.New(ctx, endpoint, rpcclient.Options{
MaxConnsPerHost: maxConnsPerHost,
RequestTimeout: requestTimeout,
})
if err != nil {
return nil, err
}
if err := c.Init(); err != nil {
return nil, err
}
return c, nil
}
func defaultClientContext(c Client, committeeAcc *wallet.Account) (*clientContext, error) {
commAct, err := actor.New(c, []actor.SignerAccount{{
Signer: transaction.Signer{
Account: committeeAcc.Contract.ScriptHash(),
Scopes: transaction.Global, // Used for test invocations only, safe to be this way.
},
Account: committeeAcc,
}})
if err != nil {
return nil, err
}
return &clientContext{
Client: c,
CommitteeAct: commAct,
ReadOnlyInvoker: invoker.New(c, nil),
}, nil
}
func (c *clientContext) sendTx(tx *transaction.Transaction, cmd *cobra.Command, await bool) error {
h, err := c.Client.SendRawTransaction(tx)
if err != nil {
return err
}
if h != tx.Hash() {
return fmt.Errorf("sent and actual tx hashes mismatch:\n\tsent: %v\n\tactual: %v", tx.Hash().StringLE(), h.StringLE())
}
c.SentTxs = append(c.SentTxs, hashVUBPair{hash: h, vub: tx.ValidUntilBlock})
if await {
return c.awaitTx(cmd)
}
return nil
}