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remote.go
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125 lines (106 loc) · 2.87 KB
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package pool
import (
"context"
"crypto/ecdsa"
"time"
"github.com/ethereum/go-ethereum/p2p/discv5"
"github.com/vipnode/vipnode/jsonrpc2"
"github.com/vipnode/vipnode/request"
)
// Remote returns a RemotePool abstraction which proxies an RPC pool client but
// takes care of all the request signing.
func Remote(client jsonrpc2.Service, privkey *ecdsa.PrivateKey) *RemotePool {
return &RemotePool{
client: client,
privkey: privkey,
nodeID: discv5.PubkeyID(&privkey.PublicKey).String(),
}
}
// Type assert for Pool implementation.
var _ Pool = &RemotePool{}
// RemotePool wraps a Pool with an RPC service and handles all the signging.
type RemotePool struct {
client jsonrpc2.Service
privkey *ecdsa.PrivateKey
nodeID string
}
func (p *RemotePool) getNonce() int64 {
return time.Now().UnixNano()
}
func (p *RemotePool) Host(ctx context.Context, req HostRequest) (*HostResponse, error) {
signedReq := request.NodeRequest{
Method: "vipnode_host",
NodeID: p.nodeID,
Nonce: p.getNonce(),
ExtraArgs: []interface{}{req},
}
args, err := signedReq.SignedArgs(p.privkey)
if err != nil {
return nil, err
}
var resp HostResponse
if err := p.client.Call(ctx, &resp, signedReq.Method, args...); err != nil {
return nil, err
}
return &resp, nil
}
func (p *RemotePool) Client(ctx context.Context, req ClientRequest) (*ClientResponse, error) {
signedReq := request.NodeRequest{
Method: "vipnode_client",
NodeID: p.nodeID,
Nonce: p.getNonce(),
ExtraArgs: []interface{}{req},
}
args, err := signedReq.SignedArgs(p.privkey)
if err != nil {
return nil, err
}
var resp ClientResponse
if err := p.client.Call(ctx, &resp, signedReq.Method, args...); err != nil {
return nil, err
}
return &resp, nil
}
func (p *RemotePool) Disconnect(ctx context.Context) error {
signedReq := request.NodeRequest{
Method: "vipnode_disconnect",
NodeID: p.nodeID,
Nonce: p.getNonce(),
}
args, err := signedReq.SignedArgs(p.privkey)
if err != nil {
return err
}
var result interface{}
return p.client.Call(ctx, &result, signedReq.Method, args...)
}
func (p *RemotePool) Update(ctx context.Context, req UpdateRequest) (*UpdateResponse, error) {
signedReq := request.NodeRequest{
Method: "vipnode_update",
NodeID: p.nodeID,
Nonce: p.getNonce(),
ExtraArgs: []interface{}{req},
}
args, err := signedReq.SignedArgs(p.privkey)
if err != nil {
return nil, err
}
var result UpdateResponse
if err := p.client.Call(ctx, &result, signedReq.Method, args...); err != nil {
return nil, err
}
return &result, nil
}
func (p *RemotePool) Withdraw(ctx context.Context) error {
signedReq := request.NodeRequest{
Method: "vipnode_withdraw",
NodeID: p.nodeID,
Nonce: p.getNonce(),
}
args, err := signedReq.SignedArgs(p.privkey)
if err != nil {
return err
}
var result interface{}
return p.client.Call(ctx, &result, signedReq.Method, args...)
}