You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
418 lines
12 KiB
418 lines
12 KiB
package rpc
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"fmt"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/pkg/errors"
|
|
|
|
"github.com/tendermint/tendermint/crypto/merkle"
|
|
cmn "github.com/tendermint/tendermint/libs/common"
|
|
lite "github.com/tendermint/tendermint/lite2"
|
|
rpcclient "github.com/tendermint/tendermint/rpc/client"
|
|
ctypes "github.com/tendermint/tendermint/rpc/core/types"
|
|
rpctypes "github.com/tendermint/tendermint/rpc/lib/types"
|
|
"github.com/tendermint/tendermint/types"
|
|
)
|
|
|
|
// Client is an RPC client, which uses lite#Client to verify data (if it can be
|
|
// proved!).
|
|
type Client struct {
|
|
cmn.BaseService
|
|
|
|
next rpcclient.Client
|
|
lc *lite.Client
|
|
prt *merkle.ProofRuntime
|
|
}
|
|
|
|
var _ rpcclient.Client = (*Client)(nil)
|
|
|
|
// NewClient returns a new client.
|
|
func NewClient(next rpcclient.Client, lc *lite.Client) *Client {
|
|
c := &Client{
|
|
next: next,
|
|
lc: lc,
|
|
prt: defaultProofRuntime(),
|
|
}
|
|
c.BaseService = *cmn.NewBaseService(nil, "Client", c)
|
|
return c
|
|
}
|
|
|
|
func (c *Client) OnStart() error {
|
|
if !c.next.IsRunning() {
|
|
return c.next.Start()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (c *Client) OnStop() {
|
|
if c.next.IsRunning() {
|
|
c.next.Stop()
|
|
}
|
|
}
|
|
|
|
func (c *Client) Status() (*ctypes.ResultStatus, error) {
|
|
return c.next.Status()
|
|
}
|
|
|
|
func (c *Client) ABCIInfo() (*ctypes.ResultABCIInfo, error) {
|
|
return c.next.ABCIInfo()
|
|
}
|
|
|
|
func (c *Client) ABCIQuery(path string, data cmn.HexBytes) (*ctypes.ResultABCIQuery, error) {
|
|
return c.ABCIQueryWithOptions(path, data, rpcclient.DefaultABCIQueryOptions)
|
|
}
|
|
|
|
// GetWithProofOptions is useful if you want full access to the ABCIQueryOptions.
|
|
// XXX Usage of path? It's not used, and sometimes it's /, sometimes /key, sometimes /store.
|
|
func (c *Client) ABCIQueryWithOptions(path string, data cmn.HexBytes,
|
|
opts rpcclient.ABCIQueryOptions) (*ctypes.ResultABCIQuery, error) {
|
|
|
|
res, err := c.next.ABCIQueryWithOptions(path, data, opts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
resp := res.Response
|
|
|
|
// Validate the response.
|
|
if resp.IsErr() {
|
|
return nil, errors.Errorf("err response code: %v", resp.Code)
|
|
}
|
|
if len(resp.Key) == 0 || resp.Proof == nil {
|
|
return nil, errors.New("empty tree")
|
|
}
|
|
if resp.Height <= 0 {
|
|
return nil, errors.New("negative or zero height")
|
|
}
|
|
|
|
// Update the light client if we're behind.
|
|
if err := c.updateLiteClientIfNeededTo(resp.Height + 1); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// AppHash for height H is in header H+1.
|
|
h, err := c.lc.TrustedHeader(resp.Height+1, time.Now())
|
|
if err != nil {
|
|
return nil, errors.Wrapf(err, "TrustedHeader(%d)", resp.Height+1)
|
|
}
|
|
|
|
// Validate the value proof against the trusted header.
|
|
if resp.Value != nil {
|
|
// Value exists
|
|
// XXX How do we encode the key into a string...
|
|
storeName, err := parseQueryStorePath(path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
kp := merkle.KeyPath{}
|
|
kp = kp.AppendKey([]byte(storeName), merkle.KeyEncodingURL)
|
|
kp = kp.AppendKey(resp.Key, merkle.KeyEncodingURL)
|
|
err = c.prt.VerifyValue(resp.Proof, h.AppHash, kp.String(), resp.Value)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "verify value proof")
|
|
}
|
|
return &ctypes.ResultABCIQuery{Response: resp}, nil
|
|
}
|
|
|
|
// OR validate the ansence proof against the trusted header.
|
|
// XXX How do we encode the key into a string...
|
|
err = c.prt.VerifyAbsence(resp.Proof, h.AppHash, string(resp.Key))
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "verify absence proof")
|
|
}
|
|
return &ctypes.ResultABCIQuery{Response: resp}, nil
|
|
}
|
|
|
|
func (c *Client) BroadcastTxCommit(tx types.Tx) (*ctypes.ResultBroadcastTxCommit, error) {
|
|
return c.next.BroadcastTxCommit(tx)
|
|
}
|
|
|
|
func (c *Client) BroadcastTxAsync(tx types.Tx) (*ctypes.ResultBroadcastTx, error) {
|
|
return c.next.BroadcastTxAsync(tx)
|
|
}
|
|
|
|
func (c *Client) BroadcastTxSync(tx types.Tx) (*ctypes.ResultBroadcastTx, error) {
|
|
return c.next.BroadcastTxSync(tx)
|
|
}
|
|
|
|
func (c *Client) UnconfirmedTxs(limit int) (*ctypes.ResultUnconfirmedTxs, error) {
|
|
return c.next.UnconfirmedTxs(limit)
|
|
}
|
|
|
|
func (c *Client) NumUnconfirmedTxs() (*ctypes.ResultUnconfirmedTxs, error) {
|
|
return c.next.NumUnconfirmedTxs()
|
|
}
|
|
|
|
func (c *Client) NetInfo() (*ctypes.ResultNetInfo, error) {
|
|
return c.next.NetInfo()
|
|
}
|
|
|
|
func (c *Client) DumpConsensusState() (*ctypes.ResultDumpConsensusState, error) {
|
|
return c.next.DumpConsensusState()
|
|
}
|
|
|
|
func (c *Client) ConsensusState() (*ctypes.ResultConsensusState, error) {
|
|
return c.next.ConsensusState()
|
|
}
|
|
|
|
func (c *Client) ConsensusParams(height *int64) (*ctypes.ResultConsensusParams, error) {
|
|
return c.next.ConsensusParams(height)
|
|
}
|
|
|
|
func (c *Client) Health() (*ctypes.ResultHealth, error) {
|
|
return c.next.Health()
|
|
}
|
|
|
|
// BlockchainInfo calls rpcclient#BlockchainInfo and then verifies every header
|
|
// returned.
|
|
func (c *Client) BlockchainInfo(minHeight, maxHeight int64) (*ctypes.ResultBlockchainInfo, error) {
|
|
res, err := c.next.BlockchainInfo(minHeight, maxHeight)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Validate res.
|
|
for _, meta := range res.BlockMetas {
|
|
if meta == nil {
|
|
return nil, errors.New("nil BlockMeta")
|
|
}
|
|
if err := meta.ValidateBasic(); err != nil {
|
|
return nil, errors.Wrap(err, "invalid BlockMeta")
|
|
}
|
|
}
|
|
|
|
// Update the light client if we're behind.
|
|
if len(res.BlockMetas) > 0 {
|
|
lastHeight := res.BlockMetas[len(res.BlockMetas)-1].Header.Height
|
|
if err := c.updateLiteClientIfNeededTo(lastHeight); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
// Verify each of the BlockMetas.
|
|
for _, meta := range res.BlockMetas {
|
|
h, err := c.lc.TrustedHeader(meta.Header.Height, time.Now())
|
|
if err != nil {
|
|
return nil, errors.Wrapf(err, "TrustedHeader(%d)", meta.Header.Height)
|
|
}
|
|
if bmH, tH := meta.Header.Hash(), h.Hash(); !bytes.Equal(bmH, tH) {
|
|
return nil, errors.Errorf("BlockMeta#Header %X does not match with trusted header %X",
|
|
bmH, tH)
|
|
}
|
|
}
|
|
|
|
return res, nil
|
|
}
|
|
|
|
func (c *Client) Genesis() (*ctypes.ResultGenesis, error) {
|
|
return c.next.Genesis()
|
|
}
|
|
|
|
// Block calls rpcclient#Block and then verifies the result.
|
|
func (c *Client) Block(height *int64) (*ctypes.ResultBlock, error) {
|
|
res, err := c.next.Block(height)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Validate res.
|
|
if err := res.BlockID.ValidateBasic(); err != nil {
|
|
return nil, err
|
|
}
|
|
if err := res.Block.ValidateBasic(); err != nil {
|
|
return nil, err
|
|
}
|
|
if bmH, bH := res.BlockID.Hash, res.Block.Hash(); !bytes.Equal(bmH, bH) {
|
|
return nil, errors.Errorf("BlockID %X does not match with Block %X",
|
|
bmH, bH)
|
|
}
|
|
|
|
// Update the light client if we're behind.
|
|
if err := c.updateLiteClientIfNeededTo(res.Block.Height); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Verify block.
|
|
h, err := c.lc.TrustedHeader(res.Block.Height, time.Now())
|
|
if err != nil {
|
|
return nil, errors.Wrapf(err, "TrustedHeader(%d)", res.Block.Height)
|
|
}
|
|
if bH, tH := res.Block.Hash(), h.Hash(); !bytes.Equal(bH, tH) {
|
|
return nil, errors.Errorf("Block#Header %X does not match with trusted header %X",
|
|
bH, tH)
|
|
}
|
|
|
|
return res, nil
|
|
}
|
|
|
|
func (c *Client) BlockResults(height *int64) (*ctypes.ResultBlockResults, error) {
|
|
return c.next.BlockResults(height)
|
|
}
|
|
|
|
func (c *Client) Commit(height *int64) (*ctypes.ResultCommit, error) {
|
|
res, err := c.next.Commit(height)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Validate res.
|
|
if err := res.SignedHeader.ValidateBasic(c.lc.ChainID()); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Update the light client if we're behind.
|
|
if err := c.updateLiteClientIfNeededTo(res.Height); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Verify commit.
|
|
h, err := c.lc.TrustedHeader(res.Height, time.Now())
|
|
if err != nil {
|
|
return nil, errors.Wrapf(err, "TrustedHeader(%d)", res.Height)
|
|
}
|
|
if rH, tH := res.Hash(), h.Hash(); !bytes.Equal(rH, tH) {
|
|
return nil, errors.Errorf("header %X does not match with trusted header %X",
|
|
rH, tH)
|
|
}
|
|
|
|
return res, nil
|
|
}
|
|
|
|
// Tx calls rpcclient#Tx method and then verifies the proof if such was
|
|
// requested.
|
|
func (c *Client) Tx(hash []byte, prove bool) (*ctypes.ResultTx, error) {
|
|
res, err := c.next.Tx(hash, prove)
|
|
if err != nil || !prove {
|
|
return res, err
|
|
}
|
|
|
|
// Validate res.
|
|
if res.Height <= 0 {
|
|
return nil, errors.Errorf("invalid ResultTx: %v", res)
|
|
}
|
|
|
|
// Update the light client if we're behind.
|
|
if err := c.updateLiteClientIfNeededTo(res.Height); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Validate the proof.
|
|
h, err := c.lc.TrustedHeader(res.Height, time.Now())
|
|
if err != nil {
|
|
return res, errors.Wrapf(err, "TrustedHeader(%d)", res.Height)
|
|
}
|
|
return res, res.Proof.Validate(h.DataHash)
|
|
}
|
|
|
|
func (c *Client) TxSearch(query string, prove bool, page, perPage int) (*ctypes.ResultTxSearch, error) {
|
|
return c.next.TxSearch(query, prove, page, perPage)
|
|
}
|
|
|
|
func (c *Client) Validators(height *int64, page, perPage int) (*ctypes.ResultValidators, error) {
|
|
return c.next.Validators(height, page, perPage)
|
|
}
|
|
|
|
func (c *Client) BroadcastEvidence(ev types.Evidence) (*ctypes.ResultBroadcastEvidence, error) {
|
|
return c.next.BroadcastEvidence(ev)
|
|
}
|
|
|
|
func (c *Client) Subscribe(ctx context.Context, subscriber, query string,
|
|
outCapacity ...int) (out <-chan ctypes.ResultEvent, err error) {
|
|
return c.next.Subscribe(ctx, subscriber, query, outCapacity...)
|
|
}
|
|
|
|
func (c *Client) Unsubscribe(ctx context.Context, subscriber, query string) error {
|
|
return c.next.Unsubscribe(ctx, subscriber, query)
|
|
}
|
|
|
|
func (c *Client) UnsubscribeAll(ctx context.Context, subscriber string) error {
|
|
return c.next.UnsubscribeAll(ctx, subscriber)
|
|
}
|
|
|
|
func (c *Client) updateLiteClientIfNeededTo(height int64) error {
|
|
lastTrustedHeight, err := c.lc.LastTrustedHeight()
|
|
if err != nil {
|
|
return errors.Wrap(err, "LastTrustedHeight")
|
|
}
|
|
if lastTrustedHeight < height {
|
|
if err := c.lc.VerifyHeaderAtHeight(height, time.Now()); err != nil {
|
|
return errors.Wrapf(err, "VerifyHeaderAtHeight(%d)", height)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (c *Client) RegisterOpDecoder(typ string, dec merkle.OpDecoder) {
|
|
c.prt.RegisterOpDecoder(typ, dec)
|
|
}
|
|
|
|
// SubscribeWS subscribes for events using the given query and remote address as
|
|
// a subscriber, but does not verify responses (UNSAFE)!
|
|
// TODO: verify data
|
|
func (c *Client) SubscribeWS(ctx *rpctypes.Context, query string) (*ctypes.ResultSubscribe, error) {
|
|
out, err := c.next.Subscribe(context.Background(), ctx.RemoteAddr(), query)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
go func() {
|
|
for {
|
|
select {
|
|
case resultEvent := <-out:
|
|
// We should have a switch here that performs a validation
|
|
// depending on the event's type.
|
|
ctx.WSConn.TryWriteRPCResponse(
|
|
rpctypes.NewRPCSuccessResponse(
|
|
ctx.WSConn.Codec(),
|
|
rpctypes.JSONRPCStringID(fmt.Sprintf("%v#event", ctx.JSONReq.ID)),
|
|
resultEvent,
|
|
))
|
|
case <-c.Quit():
|
|
return
|
|
}
|
|
}
|
|
}()
|
|
|
|
return &ctypes.ResultSubscribe{}, nil
|
|
}
|
|
|
|
// UnsubscribeWS calls original client's Unsubscribe using remote address as a
|
|
// subscriber.
|
|
func (c *Client) UnsubscribeWS(ctx *rpctypes.Context, query string) (*ctypes.ResultUnsubscribe, error) {
|
|
err := c.next.Unsubscribe(context.Background(), ctx.RemoteAddr(), query)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &ctypes.ResultUnsubscribe{}, nil
|
|
}
|
|
|
|
// UnsubscribeAllWS calls original client's UnsubscribeAll using remote address
|
|
// as a subscriber.
|
|
func (c *Client) UnsubscribeAllWS(ctx *rpctypes.Context) (*ctypes.ResultUnsubscribe, error) {
|
|
err := c.next.UnsubscribeAll(context.Background(), ctx.RemoteAddr())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &ctypes.ResultUnsubscribe{}, nil
|
|
}
|
|
|
|
func parseQueryStorePath(path string) (storeName string, err error) {
|
|
if !strings.HasPrefix(path, "/") {
|
|
return "", fmt.Errorf("expected path to start with /")
|
|
}
|
|
|
|
paths := strings.SplitN(path[1:], "/", 3)
|
|
switch {
|
|
case len(paths) != 3:
|
|
return "", errors.New("expected format like /store/<storeName>/key")
|
|
case paths[0] != "store":
|
|
return "", errors.New("expected format like /store/<storeName>/key")
|
|
case paths[2] != "key":
|
|
return "", errors.New("expected format like /store/<storeName>/key")
|
|
}
|
|
|
|
return paths[1], nil
|
|
}
|