lotus/cli/util/api.go

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package cliutil
import (
"context"
"errors"
"fmt"
"net/http"
"net/url"
"os"
"os/signal"
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"reflect"
"strings"
"syscall"
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"time"
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"github.com/mitchellh/go-homedir"
"github.com/urfave/cli/v2"
"golang.org/x/xerrors"
"github.com/filecoin-project/go-jsonrpc"
"github.com/filecoin-project/lotus/api"
"github.com/filecoin-project/lotus/api/client"
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"github.com/filecoin-project/lotus/api/v0api"
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"github.com/filecoin-project/lotus/api/v1api"
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"github.com/filecoin-project/lotus/lib/retry"
"github.com/filecoin-project/lotus/node/repo"
)
const (
metadataTraceContext = "traceContext"
)
// GetAPIInfo returns the API endpoint to use for the specified kind of repo.
//
// The order of precedence is as follows:
//
// 1. *-api-url command line flags.
// 2. *_API_INFO environment variables
// 3. deprecated *_API_INFO environment variables
// 4. *-repo command line flags.
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func GetAPIInfoMulti(ctx *cli.Context, t repo.RepoType) ([]APIInfo, error) {
// Check if there was a flag passed with the listen address of the API
// server (only used by the tests)
for _, f := range t.APIFlags() {
if !ctx.IsSet(f) {
continue
}
strma := ctx.String(f)
strma = strings.TrimSpace(strma)
return []APIInfo{{Addr: strma}}, nil
}
//
// Note: it is not correct/intuitive to prefer environment variables over
// CLI flags (repo flags below).
//
primaryEnv, fallbacksEnvs, deprecatedEnvs := t.APIInfoEnvVars()
env, ok := os.LookupEnv(primaryEnv)
if ok {
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return ParseApiInfoMulti(env), nil
}
for _, env := range deprecatedEnvs {
env, ok := os.LookupEnv(env)
if ok {
log.Warnf("Using deprecated env(%s) value, please use env(%s) instead.", env, primaryEnv)
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return ParseApiInfoMulti(env), nil
}
}
for _, f := range t.RepoFlags() {
// cannot use ctx.IsSet because it ignores default values
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path := ctx.String(f)
if path == "" {
continue
}
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p, err := homedir.Expand(path)
if err != nil {
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return []APIInfo{}, xerrors.Errorf("could not expand home dir (%s): %w", f, err)
}
r, err := repo.NewFS(p)
if err != nil {
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return []APIInfo{}, xerrors.Errorf("could not open repo at path: %s; %w", p, err)
}
exists, err := r.Exists()
if err != nil {
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return []APIInfo{}, xerrors.Errorf("repo.Exists returned an error: %w", err)
}
if !exists {
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return []APIInfo{}, errors.New("repo directory does not exist. Make sure your configuration is correct")
}
ma, err := r.APIEndpoint()
if err != nil {
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return []APIInfo{}, xerrors.Errorf("could not get api endpoint: %w", err)
}
token, err := r.APIToken()
if err != nil {
log.Warnf("Couldn't load CLI token, capabilities may be limited: %v", err)
}
return []APIInfo{{
Addr: ma.String(),
Token: token,
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}}, nil
}
for _, env := range fallbacksEnvs {
env, ok := os.LookupEnv(env)
if ok {
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return ParseApiInfoMulti(env), nil
}
}
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return []APIInfo{}, fmt.Errorf("could not determine API endpoint for node type: %v", t.Type())
}
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func GetAPIInfo(ctx *cli.Context, t repo.RepoType) (APIInfo, error) {
ainfos, err := GetAPIInfoMulti(ctx, t)
if err != nil || len(ainfos) == 0 {
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return APIInfo{}, err
}
if len(ainfos) > 1 {
log.Warn("multiple API infos received when only one was expected")
}
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return ainfos[0], nil
}
type HttpHead struct {
addr string
header http.Header
}
func GetRawAPIMulti(ctx *cli.Context, t repo.RepoType, version string) ([]HttpHead, error) {
var httpHeads []HttpHead
ainfos, err := GetAPIInfoMulti(ctx, t)
if err != nil || len(ainfos) == 0 {
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return httpHeads, xerrors.Errorf("could not get API info for %s: %w", t.Type(), err)
}
for _, ainfo := range ainfos {
addr, err := ainfo.DialArgs(version)
if err != nil {
return httpHeads, xerrors.Errorf("could not get DialArgs: %w", err)
}
httpHeads = append(httpHeads, HttpHead{addr: addr, header: ainfo.AuthHeader()})
}
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if IsVeryVerbose {
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_, _ = fmt.Fprintf(ctx.App.Writer, "using raw API %s endpoint: %s\n", version, httpHeads[0].addr)
}
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return httpHeads, nil
}
func GetRawAPI(ctx *cli.Context, t repo.RepoType, version string) (string, http.Header, error) {
heads, err := GetRawAPIMulti(ctx, t, version)
if err != nil {
return "", nil, err
}
if len(heads) > 1 {
log.Warnf("More than 1 header received when expecting only one")
}
return heads[0].addr, heads[0].header, nil
}
func GetCommonAPI(ctx *cli.Context) (api.CommonNet, jsonrpc.ClientCloser, error) {
ti, ok := ctx.App.Metadata["repoType"]
if !ok {
log.Errorf("unknown repo type, are you sure you want to use GetCommonAPI?")
ti = repo.FullNode
}
t, ok := ti.(repo.RepoType)
if !ok {
log.Errorf("repoType type does not match the type of repo.RepoType")
}
if tn, ok := ctx.App.Metadata["testnode-storage"]; ok {
return tn.(api.StorageMiner), func() {}, nil
}
if tn, ok := ctx.App.Metadata["testnode-full"]; ok {
return tn.(api.FullNode), func() {}, nil
}
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addr, headers, err := GetRawAPI(ctx, t, "v0")
if err != nil {
return nil, nil, err
}
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return client.NewCommonRPCV0(ctx.Context, addr, headers)
}
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func GetFullNodeAPI(ctx *cli.Context) (v0api.FullNode, jsonrpc.ClientCloser, error) {
// use the mocked API in CLI unit tests, see cli/mocks_test.go for mock definition
if mock, ok := ctx.App.Metadata["test-full-api"]; ok {
return &v0api.WrapperV1Full{FullNode: mock.(v1api.FullNode)}, func() {}, nil
}
if tn, ok := ctx.App.Metadata["testnode-full"]; ok {
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return &v0api.WrapperV1Full{FullNode: tn.(v1api.FullNode)}, func() {}, nil
}
addr, headers, err := GetRawAPI(ctx, repo.FullNode, "v0")
if err != nil {
return nil, nil, err
}
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if IsVeryVerbose {
_, _ = fmt.Fprintln(ctx.App.Writer, "using full node API v0 endpoint:", addr)
}
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return client.NewFullNodeRPCV0(ctx.Context, addr, headers)
}
type contextKey string
// Not thread safe
func OnSingleNode(ctx context.Context) context.Context {
return context.WithValue(ctx, contextKey("retry-node"), new(*int))
}
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func FullNodeProxy[T api.FullNode](ins []T, outstr *api.FullNodeStruct) {
outs := api.GetInternalStructs(outstr)
var rins []reflect.Value
for _, in := range ins {
rins = append(rins, reflect.ValueOf(in))
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}
for _, out := range outs {
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rProxyInternal := reflect.ValueOf(out).Elem()
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for f := 0; f < rProxyInternal.NumField(); f++ {
field := rProxyInternal.Type().Field(f)
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var fns []reflect.Value
for _, rin := range rins {
fns = append(fns, rin.MethodByName(field.Name))
}
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rProxyInternal.Field(f).Set(reflect.MakeFunc(field.Type, func(args []reflect.Value) (results []reflect.Value) {
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errorsToRetry := []error{&jsonrpc.RPCConnectionError{}, &jsonrpc.ErrClient{}}
initialBackoff, err := time.ParseDuration("1s")
if err != nil {
return nil
}
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ctx := args[0].Interface().(context.Context)
curr := -1
// for calls that need to be performed on the same node
// primarily for miner when calling create block and submit block subsequently
key := contextKey("retry-node")
if ctx.Value(key) != nil {
if (*ctx.Value(key).(**int)) == nil {
*ctx.Value(key).(**int) = &curr
} else {
curr = **ctx.Value(key).(**int) - 1
}
}
total := len(rins)
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result, _ := retry.Retry(ctx, 5, initialBackoff, errorsToRetry, func() ([]reflect.Value, error) {
curr = (curr + 1) % total
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result := fns[curr].Call(args)
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if result[len(result)-1].IsNil() {
return result, nil
}
e := result[len(result)-1].Interface().(error)
return result, e
})
return result
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}))
}
}
}
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func GetFullNodeAPIV1Single(ctx *cli.Context) (v1api.FullNode, jsonrpc.ClientCloser, error) {
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if tn, ok := ctx.App.Metadata["testnode-full"]; ok {
return tn.(v1api.FullNode), func() {}, nil
}
addr, headers, err := GetRawAPI(ctx, repo.FullNode, "v1")
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if err != nil {
return nil, nil, err
}
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if IsVeryVerbose {
_, _ = fmt.Fprintln(ctx.App.Writer, "using full node API v1 endpoint:", addr)
}
v1API, closer, err := client.NewFullNodeRPCV1(ctx.Context, addr, headers)
if err != nil {
return nil, nil, err
}
v, err := v1API.Version(ctx.Context)
if err != nil {
return nil, nil, err
}
if !v.APIVersion.EqMajorMinor(api.FullAPIVersion1) {
return nil, nil, xerrors.Errorf("Remote API version didn't match (expected %s, remote %s)", api.FullAPIVersion1, v.APIVersion)
}
return v1API, closer, nil
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}
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type GetFullNodeOptions struct {
ethSubHandler api.EthSubscriber
}
type GetFullNodeOption func(*GetFullNodeOptions)
func FullNodeWithEthSubscribtionHandler(sh api.EthSubscriber) GetFullNodeOption {
return func(opts *GetFullNodeOptions) {
opts.ethSubHandler = sh
}
}
func GetFullNodeAPIV1(ctx *cli.Context, opts ...GetFullNodeOption) (v1api.FullNode, jsonrpc.ClientCloser, error) {
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if tn, ok := ctx.App.Metadata["testnode-full"]; ok {
return tn.(v1api.FullNode), func() {}, nil
}
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var options GetFullNodeOptions
for _, opt := range opts {
opt(&options)
}
var rpcOpts []jsonrpc.Option
if options.ethSubHandler != nil {
rpcOpts = append(rpcOpts, jsonrpc.WithClientHandler("Filecoin", options.ethSubHandler), jsonrpc.WithClientHandlerAlias("eth_subscription", "Filecoin.EthSubscription"))
}
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heads, err := GetRawAPIMulti(ctx, repo.FullNode, "v1")
if err != nil {
return nil, nil, err
}
if IsVeryVerbose {
_, _ = fmt.Fprintln(ctx.App.Writer, "using full node API v1 endpoint:", heads[0].addr)
}
var fullNodes []api.FullNode
var closers []jsonrpc.ClientCloser
for _, head := range heads {
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v1api, closer, err := client.NewFullNodeRPCV1(ctx.Context, head.addr, head.header, rpcOpts...)
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if err != nil {
log.Warnf("Not able to establish connection to node with addr: ", head.addr)
continue
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}
fullNodes = append(fullNodes, v1api)
closers = append(closers, closer)
}
// When running in cluster mode and trying to establish connections to multiple nodes, fail
// if less than 2 lotus nodes are actually running
if len(heads) > 1 && len(fullNodes) < 2 {
return nil, nil, xerrors.Errorf("Not able to establish connection to more than a single node")
}
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finalCloser := func() {
for _, c := range closers {
c()
}
}
var v1API api.FullNodeStruct
FullNodeProxy(fullNodes, &v1API)
v, err := v1API.Version(ctx.Context)
if err != nil {
return nil, nil, err
}
if !v.APIVersion.EqMajorMinor(api.FullAPIVersion1) {
return nil, nil, xerrors.Errorf("Remote API version didn't match (expected %s, remote %s)", api.FullAPIVersion1, v.APIVersion)
}
return &v1API, finalCloser, nil
}
type GetStorageMinerOptions struct {
PreferHttp bool
}
type GetStorageMinerOption func(*GetStorageMinerOptions)
func StorageMinerUseHttp(opts *GetStorageMinerOptions) {
opts.PreferHttp = true
}
func GetStorageMinerAPI(ctx *cli.Context, opts ...GetStorageMinerOption) (api.StorageMiner, jsonrpc.ClientCloser, error) {
var options GetStorageMinerOptions
for _, opt := range opts {
opt(&options)
}
if tn, ok := ctx.App.Metadata["testnode-storage"]; ok {
return tn.(api.StorageMiner), func() {}, nil
}
addr, headers, err := GetRawAPI(ctx, repo.StorageMiner, "v0")
if err != nil {
return nil, nil, err
}
if options.PreferHttp {
u, err := url.Parse(addr)
if err != nil {
return nil, nil, xerrors.Errorf("parsing miner api URL: %w", err)
}
switch u.Scheme {
case "ws":
u.Scheme = "http"
case "wss":
u.Scheme = "https"
}
addr = u.String()
}
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if IsVeryVerbose {
_, _ = fmt.Fprintln(ctx.App.Writer, "using miner API v0 endpoint:", addr)
}
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return client.NewStorageMinerRPCV0(ctx.Context, addr, headers)
}
func GetWorkerAPI(ctx *cli.Context) (api.Worker, jsonrpc.ClientCloser, error) {
addr, headers, err := GetRawAPI(ctx, repo.Worker, "v0")
if err != nil {
return nil, nil, err
}
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if IsVeryVerbose {
_, _ = fmt.Fprintln(ctx.App.Writer, "using worker API v0 endpoint:", addr)
}
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return client.NewWorkerRPCV0(ctx.Context, addr, headers)
}
func GetMarketsAPI(ctx *cli.Context) (api.StorageMiner, jsonrpc.ClientCloser, error) {
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// to support lotus-miner cli tests.
if tn, ok := ctx.App.Metadata["testnode-storage"]; ok {
return tn.(api.StorageMiner), func() {}, nil
}
addr, headers, err := GetRawAPI(ctx, repo.Markets, "v0")
if err != nil {
return nil, nil, err
}
if IsVeryVerbose {
_, _ = fmt.Fprintln(ctx.App.Writer, "using markets API v0 endpoint:", addr)
}
// the markets node is a specialised miner's node, supporting only the
// markets API, which is a subset of the miner API. All non-markets
// operations will error out with "unsupported".
return client.NewStorageMinerRPCV0(ctx.Context, addr, headers)
}
func GetGatewayAPI(ctx *cli.Context) (api.Gateway, jsonrpc.ClientCloser, error) {
addr, headers, err := GetRawAPI(ctx, repo.FullNode, "v1")
if err != nil {
return nil, nil, err
}
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if IsVeryVerbose {
_, _ = fmt.Fprintln(ctx.App.Writer, "using gateway API v1 endpoint:", addr)
}
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return client.NewGatewayRPCV1(ctx.Context, addr, headers)
}
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func GetGatewayAPIV0(ctx *cli.Context) (v0api.Gateway, jsonrpc.ClientCloser, error) {
addr, headers, err := GetRawAPI(ctx, repo.FullNode, "v0")
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if err != nil {
return nil, nil, err
}
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if IsVeryVerbose {
_, _ = fmt.Fprintln(ctx.App.Writer, "using gateway API v0 endpoint:", addr)
}
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return client.NewGatewayRPCV0(ctx.Context, addr, headers)
}
func DaemonContext(cctx *cli.Context) context.Context {
if mtCtx, ok := cctx.App.Metadata[metadataTraceContext]; ok {
return mtCtx.(context.Context)
}
return context.Background()
}
// ReqContext returns context for cli execution. Calling it for the first time
// installs SIGTERM handler that will close returned context.
// Not safe for concurrent execution.
func ReqContext(cctx *cli.Context) context.Context {
tCtx := DaemonContext(cctx)
ctx, done := context.WithCancel(tCtx)
sigChan := make(chan os.Signal, 2)
go func() {
<-sigChan
done()
}()
signal.Notify(sigChan, syscall.SIGTERM, syscall.SIGINT, syscall.SIGHUP)
return ctx
}