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local_client.go
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local_client.go
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// Copyright (C) 2023 Gobalsky Labs Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package abci
import (
"context"
"time"
tmquery "github.com/tendermint/tendermint/libs/pubsub/query"
"github.com/tendermint/tendermint/libs/service"
nm "github.com/tendermint/tendermint/node"
"github.com/tendermint/tendermint/rpc/client/local"
tmctypes "github.com/tendermint/tendermint/rpc/core/types"
tmtypes "github.com/tendermint/tendermint/types"
)
type LocalClient struct {
node *local.Local
genesisDoc *cachedGenesisDoc
}
func newLocalClient(node service.Service) (*LocalClient, error) {
localNode := local.New(node.(*nm.Node))
return &LocalClient{
node: localNode,
genesisDoc: newCachedGenesisDoc(),
}, nil
}
func (c *LocalClient) SendTransactionAsync(ctx context.Context, bytes []byte) (*tmctypes.ResultBroadcastTx, error) {
// Fire off the transaction for consensus
res, err := c.node.BroadcastTxAsync(ctx, bytes)
if err != nil {
return nil, err
}
return res, nil
}
func (c *LocalClient) SendTransactionSync(ctx context.Context, bytes []byte) (*tmctypes.ResultBroadcastTx, error) {
// Fire off the transaction for consensus
return c.node.BroadcastTxSync(ctx, bytes)
}
func (c *LocalClient) SendTransactionCommit(ctx context.Context, bytes []byte) (*tmctypes.ResultBroadcastTxCommit, error) {
// Fire off the transaction for consensus
return c.node.BroadcastTxCommit(ctx, bytes)
}
func (c *LocalClient) CheckTransaction(ctx context.Context, bytes []byte) (*tmctypes.ResultCheckTx, error) {
return c.node.CheckTx(ctx, bytes)
}
// GetGenesisTime retrieves the genesis time from the blockchain.
func (c *LocalClient) GetGenesisTime(ctx context.Context) (genesisTime time.Time, err error) {
res, err := c.genesisDoc.Get(ctx, c.node)
if err != nil {
return time.Time{}, err
}
return res.GenesisTime.UTC(), nil
}
// GetChainID retrieves the chainID from the blockchain.
func (c *LocalClient) GetChainID(ctx context.Context) (chainID string, err error) {
res, err := c.genesisDoc.Get(ctx, c.node)
if err != nil {
return "", err
}
return res.ChainID, nil
}
// GetStatus returns the current status of the chain.
func (c *LocalClient) GetStatus(ctx context.Context) (status *tmctypes.ResultStatus, err error) {
return c.node.Status(ctx)
}
// GetNetworkInfo return information of the current network.
func (c *LocalClient) GetNetworkInfo(ctx context.Context) (netInfo *tmctypes.ResultNetInfo, err error) {
return c.node.NetInfo(ctx)
}
// GetUnconfirmedTxCount return the current count of unconfirmed transactions.
func (c *LocalClient) GetUnconfirmedTxCount(ctx context.Context) (count int, err error) {
res, err := c.node.NumUnconfirmedTxs(ctx)
if err != nil {
return 0, err
}
return res.Count, err
}
// Health returns the result of the health endpoint of the chain.
func (c *LocalClient) Health(ctx context.Context) (*tmctypes.ResultHealth, error) {
return c.node.Health(ctx)
}
func (c *LocalClient) Validators(ctx context.Context, height *int64) ([]*tmtypes.Validator, error) {
res, err := c.node.Validators(ctx, height, nil, nil)
if err != nil {
return nil, err
}
return res.Validators, nil
}
func (c *LocalClient) Genesis(ctx context.Context) (*tmtypes.GenesisDoc, error) {
res, err := c.genesisDoc.Get(ctx, c.node)
if err != nil {
return nil, err
}
return res, nil
}
func (c *LocalClient) GenesisValidators(ctx context.Context) ([]*tmtypes.Validator, error) {
gen, err := c.Genesis(ctx)
if err != nil {
return nil, err
}
validators := make([]*tmtypes.Validator, 0, len(gen.Validators))
for _, v := range gen.Validators {
validators = append(validators, &tmtypes.Validator{
Address: v.Address,
PubKey: v.PubKey,
VotingPower: v.Power,
})
}
return validators, nil
}
// Subscribe subscribes to any event matching query (https://godoc.org/github.com/tendermint/tendermint/types#pkg-constants).
// Subscribe will call fn each time it receives an event from the node.
// The function returns nil when the context is canceled or when fn returns an error.
func (c *LocalClient) Subscribe(ctx context.Context, fn func(tmctypes.ResultEvent) error, queries ...string) error {
if err := c.node.Start(); err != nil {
return err
}
defer c.node.Stop()
errCh := make(chan error)
for _, query := range queries {
q, err := tmquery.New(query)
if err != nil {
return err
}
// For subscription we use "vega" as the client name but it's ignored by the implementation.
// 10 is the channel capacity which is absolutely arbitraty.
out, err := c.node.Subscribe(ctx, "vega", q.String(), 10)
if err != nil {
return err
}
go func() {
for res := range out {
if err := fn(res); err != nil {
errCh <- err
return
}
}
}()
}
defer c.node.UnsubscribeAll(context.Background(), "vega")
return <-errCh
}
func (c *LocalClient) Start() error {
return nil // Nothing to do for this client type.
}