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fb8b00f1d8
Refs #1771 ADR: https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-044-lite-client-with-weak-subjectivity.md ## Commits: * add Verifier and VerifyCommitTrusting * add two more checks make trustLevel an option * float32 for trustLevel * check newHeader time * started writing lite Client * unify Verify methods * ensure h2.Header.bfttime < h1.Header.bfttime + tp * move trust checks into Verify function * add more comments * more docs * started writing tests * unbonding period failures * tests are green * export ErrNewHeaderTooFarIntoFuture * make golangci happy * test for non-adjusted headers * more precision * providers and stores * VerifyHeader and VerifyHeaderAtHeight funcs * fix compile errors * remove lastVerifiedHeight, persist new trusted header * sequential verification * remove TrustedStore option * started writing tests for light client * cover basic cases for linear verification * bisection tests PASS * rename BisectingVerification to SkippingVerification * refactor the code * add TrustedHeader method * consolidate sequential verification tests * consolidate skipping verification tests * rename trustedVals to trustedNextVals * start writing docs * ValidateTrustLevel func and ErrOldHeaderExpired error * AutoClient and example tests * fix errors * update doc * remove ErrNewHeaderTooFarIntoFuture This check is unnecessary given existing a) ErrOldHeaderExpired b) h2.Time > now checks. * return an error if we're at more recent height * add comments * add LastSignedHeaderHeight method to Store I think it's fine if Store tracks last height * copy over proxy from old lite package * make TrustedHeader return latest if height=0 * modify LastSignedHeaderHeight to return an error if no headers exist * copy over proxy impl * refactor proxy and start http lite client * Tx and BlockchainInfo methods * Block method * commit method * code compiles again * lite client compiles * extract updateLiteClientIfNeededTo func * move final parts * add placeholder for tests * force usage of lite http client in proxy * comment out query tests for now * explicitly mention tp: trusting period * verify nextVals in VerifyHeader * refactor bisection * move the NextValidatorsHash check into updateTrustedHeaderAndVals + update the comment * add ConsensusParams method to RPC client * add ConsensusParams to rpc/mock/client * change trustLevel type to a new cmn.Fraction type + update SkippingVerification comment * stress out trustLevel is only used for non-adjusted headers * fixes after Fede's review Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> * compare newHeader with a header from an alternative provider * save pivot header Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349122824 * check header can still be trusted in TrustedHeader Refs https://github.com/tendermint/tendermint/pull/3989#discussion_r349101424 * lite: update Validators and Block endpoints - Block no longer contains BlockMeta - Validators now accept two additional params: page and perPage * make linter happy
103 lines
2.5 KiB
Go
103 lines
2.5 KiB
Go
package proxy
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import (
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"context"
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"net"
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"net/http"
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"github.com/pkg/errors"
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amino "github.com/tendermint/go-amino"
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"github.com/tendermint/tendermint/libs/log"
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tmpubsub "github.com/tendermint/tendermint/libs/pubsub"
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lrpc "github.com/tendermint/tendermint/lite2/rpc"
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ctypes "github.com/tendermint/tendermint/rpc/core/types"
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rpcserver "github.com/tendermint/tendermint/rpc/lib/server"
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)
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// A Proxy defines parameters for running an HTTP server proxy.
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type Proxy struct {
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Addr string // TCP address to listen on, ":http" if empty
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Config *rpcserver.Config
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Codec *amino.Codec
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Client *lrpc.Client
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Logger log.Logger
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}
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// ListenAndServe configures the rpcserver.WebsocketManager, sets up the RPC
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// routes to proxy via Client, and starts up an HTTP server on the TCP network
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// address p.Addr.
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// See http#Server#ListenAndServe.
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func (p *Proxy) ListenAndServe() error {
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listener, mux, err := p.listen()
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if err != nil {
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return err
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}
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return rpcserver.StartHTTPServer(
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listener,
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mux,
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p.Logger,
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p.Config,
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)
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}
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// ListenAndServeTLS acts identically to ListenAndServe, except that it expects
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// HTTPS connections.
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// See http#Server#ListenAndServeTLS.
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func (p *Proxy) ListenAndServeTLS(certFile, keyFile string) error {
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listener, mux, err := p.listen()
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if err != nil {
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return err
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}
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return rpcserver.StartHTTPAndTLSServer(
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listener,
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mux,
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certFile,
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keyFile,
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p.Logger,
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p.Config,
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)
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}
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func (p *Proxy) listen() (net.Listener, *http.ServeMux, error) {
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ctypes.RegisterAmino(p.Codec)
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mux := http.NewServeMux()
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// 1) Register regular routes.
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r := RPCRoutes(p.Client)
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rpcserver.RegisterRPCFuncs(mux, r, p.Codec, p.Logger)
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// 2) Allow websocket connections.
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wmLogger := p.Logger.With("protocol", "websocket")
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wm := rpcserver.NewWebsocketManager(r, p.Codec,
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rpcserver.OnDisconnect(func(remoteAddr string) {
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err := p.Client.UnsubscribeAll(context.Background(), remoteAddr)
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if err != nil && err != tmpubsub.ErrSubscriptionNotFound {
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wmLogger.Error("Failed to unsubscribe addr from events", "addr", remoteAddr, "err", err)
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}
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}),
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rpcserver.ReadLimit(p.Config.MaxBodyBytes),
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)
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wm.SetLogger(wmLogger)
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mux.HandleFunc("/websocket", wm.WebsocketHandler)
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// 3) Start a client.
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if !p.Client.IsRunning() {
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if err := p.Client.Start(); err != nil {
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return nil, mux, errors.Wrap(err, "Client#Start")
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}
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}
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// 4) Start listening for new connections.
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listener, err := rpcserver.Listen(p.Addr, p.Config)
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if err != nil {
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return nil, mux, err
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}
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return listener, mux, nil
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}
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