mirror of
https://github.com/fiatjaf/nak.git
synced 2024-11-21 15:59:07 -05:00
333 lines
9.9 KiB
Go
333 lines
9.9 KiB
Go
package main
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import (
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"context"
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"fmt"
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"os"
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"strings"
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"time"
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"github.com/fiatjaf/cli/v3"
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"github.com/mailru/easyjson"
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"github.com/nbd-wtf/go-nostr"
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"github.com/nbd-wtf/go-nostr/nip13"
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"github.com/nbd-wtf/go-nostr/nip19"
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"golang.org/x/exp/slices"
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)
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const (
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CATEGORY_EVENT_FIELDS = "EVENT FIELDS"
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CATEGORY_SIGNER = "SIGNER OPTIONS"
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CATEGORY_EXTRAS = "EXTRAS"
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)
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var event = &cli.Command{
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Name: "event",
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Usage: "generates an encoded event and either prints it or sends it to a set of relays",
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Description: `outputs an event built with the flags. if one or more relays are given as arguments, an attempt is also made to publish the event to these relays.
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example:
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nak event -c hello wss://nos.lol
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nak event -k 3 -p 3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d
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if an event -- or a partial event -- is given on stdin, the flags can be used to optionally modify it. if it is modified it is rehashed and resigned, otherwise it is just returned as given, but that can be used to just publish to relays.
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example:
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echo '{"id":"a889df6a387419ff204305f4c2d296ee328c3cd4f8b62f205648a541b4554dfb","pubkey":"c6047f9441ed7d6d3045406e95c07cd85c778e4b8cef3ca7abac09b95c709ee5","created_at":1698623783,"kind":1,"tags":[],"content":"hello from the nostr army knife","sig":"84876e1ee3e726da84e5d195eb79358b2b3eaa4d9bd38456fde3e8a2af3f1cd4cda23f23fda454869975b3688797d4c66e12f4c51c1b43c6d2997c5e61865661"}' | nak event wss://offchain.pub
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echo '{"tags": [["t", "spam"]]}' | nak event -c 'this is spam'`,
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DisableSliceFlagSeparator: true,
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Flags: append(defaultKeyFlags,
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// ~ these args are only for the convoluted musig2 signing process
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// they will be generally copy-shared-pasted across some manual coordination method between participants
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&cli.UintFlag{
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Name: "musig",
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Usage: "number of signers to use for musig2",
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Value: 1,
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DefaultText: "1 -- i.e. do not use musig2 at all",
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Category: CATEGORY_SIGNER,
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},
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&cli.StringSliceFlag{
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Name: "musig-pubkey",
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Hidden: true,
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},
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&cli.StringFlag{
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Name: "musig-nonce-secret",
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Hidden: true,
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},
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&cli.StringSliceFlag{
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Name: "musig-nonce",
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Hidden: true,
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},
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&cli.StringSliceFlag{
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Name: "musig-partial",
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Hidden: true,
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},
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// ~~~
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&cli.UintFlag{
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Name: "pow",
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Usage: "NIP-13 difficulty to target when doing hash work on the event id",
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Category: CATEGORY_EXTRAS,
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},
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&cli.BoolFlag{
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Name: "envelope",
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Usage: "print the event enveloped in a [\"EVENT\", ...] message ready to be sent to a relay",
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Category: CATEGORY_EXTRAS,
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},
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&cli.BoolFlag{
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Name: "auth",
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Usage: "always perform NIP-42 \"AUTH\" when facing an \"auth-required: \" rejection and try again",
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Category: CATEGORY_EXTRAS,
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},
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&cli.BoolFlag{
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Name: "nevent",
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Usage: "print the nevent code (to stderr) after the event is published",
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Category: CATEGORY_EXTRAS,
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},
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&cli.UintFlag{
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Name: "kind",
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Aliases: []string{"k"},
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Usage: "event kind",
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DefaultText: "1",
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Value: 0,
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Category: CATEGORY_EVENT_FIELDS,
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},
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&cli.StringFlag{
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Name: "content",
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Aliases: []string{"c"},
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Usage: "event content",
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DefaultText: "hello from the nostr army knife",
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Value: "",
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Category: CATEGORY_EVENT_FIELDS,
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},
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&cli.StringSliceFlag{
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Name: "tag",
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Aliases: []string{"t"},
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Usage: "sets a tag field on the event, takes a value like -t e=<id> or -t sometag=\"value one;value two;value three\"",
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Category: CATEGORY_EVENT_FIELDS,
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},
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&cli.StringSliceFlag{
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Name: "e",
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Usage: "shortcut for --tag e=<value>",
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Category: CATEGORY_EVENT_FIELDS,
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},
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&cli.StringSliceFlag{
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Name: "p",
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Usage: "shortcut for --tag p=<value>",
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Category: CATEGORY_EVENT_FIELDS,
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},
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&cli.StringSliceFlag{
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Name: "d",
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Usage: "shortcut for --tag d=<value>",
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Category: CATEGORY_EVENT_FIELDS,
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},
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&NaturalTimeFlag{
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Name: "created-at",
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Aliases: []string{"time", "ts"},
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Usage: "unix timestamp value for the created_at field",
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DefaultText: "now",
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Value: nostr.Now(),
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Category: CATEGORY_EVENT_FIELDS,
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},
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),
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ArgsUsage: "[relay...]",
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Action: func(ctx context.Context, c *cli.Command) error {
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// try to connect to the relays here
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var relays []*nostr.Relay
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if relayUrls := c.Args().Slice(); len(relayUrls) > 0 {
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relays = connectToAllRelays(ctx, relayUrls, false)
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if len(relays) == 0 {
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log("failed to connect to any of the given relays.\n")
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os.Exit(3)
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}
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}
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defer func() {
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for _, relay := range relays {
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relay.Close()
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}
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}()
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kr, sec, err := gatherKeyerFromArguments(ctx, c)
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if err != nil {
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return err
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}
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doAuth := c.Bool("auth")
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// then process input and generate events
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for stdinEvent := range getStdinLinesOrBlank() {
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evt := nostr.Event{
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Tags: make(nostr.Tags, 0, 3),
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}
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kindWasSupplied := false
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mustRehashAndResign := false
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if stdinEvent != "" {
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if err := easyjson.Unmarshal([]byte(stdinEvent), &evt); err != nil {
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ctx = lineProcessingError(ctx, "invalid event received from stdin: %s", err)
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continue
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}
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kindWasSupplied = strings.Contains(stdinEvent, `"kind"`)
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}
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if kind := c.Uint("kind"); slices.Contains(c.FlagNames(), "kind") {
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evt.Kind = int(kind)
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mustRehashAndResign = true
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} else if !kindWasSupplied {
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evt.Kind = 1
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mustRehashAndResign = true
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}
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if c.IsSet("content") {
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evt.Content = c.String("content")
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mustRehashAndResign = true
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} else if evt.Content == "" && evt.Kind == 1 {
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evt.Content = "hello from the nostr army knife"
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mustRehashAndResign = true
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}
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tagFlags := c.StringSlice("tag")
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tags := make(nostr.Tags, 0, len(tagFlags)+2)
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for _, tagFlag := range tagFlags {
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// tags are in the format key=value
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tagName, tagValue, found := strings.Cut(tagFlag, "=")
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tag := []string{tagName}
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if found {
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// tags may also contain extra elements separated with a ";"
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tagValues := strings.Split(tagValue, ";")
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tag = append(tag, tagValues...)
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}
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tags = append(tags, tag)
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}
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for _, etag := range c.StringSlice("e") {
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tags = tags.AppendUnique([]string{"e", etag})
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}
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for _, ptag := range c.StringSlice("p") {
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tags = tags.AppendUnique([]string{"p", ptag})
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}
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for _, dtag := range c.StringSlice("d") {
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tags = tags.AppendUnique([]string{"d", dtag})
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}
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if len(tags) > 0 {
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for _, tag := range tags {
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evt.Tags = append(evt.Tags, tag)
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}
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mustRehashAndResign = true
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}
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if c.IsSet("created-at") {
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evt.CreatedAt = getNaturalDate(c, "created-at")
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mustRehashAndResign = true
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} else if evt.CreatedAt == 0 {
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evt.CreatedAt = nostr.Now()
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mustRehashAndResign = true
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}
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if c.IsSet("musig") || c.IsSet("sec") || c.IsSet("prompt-sec") {
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mustRehashAndResign = true
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}
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if difficulty := c.Uint("pow"); difficulty > 0 {
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// before doing pow we need the pubkey
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if numSigners := c.Uint("musig"); numSigners > 1 {
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pubkeys := c.StringSlice("musig-pubkey")
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if int(numSigners) != len(pubkeys) {
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return fmt.Errorf("when doing a pow with musig we must know all signer pubkeys upfront")
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}
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evt.PubKey, err = getMusigAggregatedKey(ctx, pubkeys)
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if err != nil {
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return err
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}
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} else {
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evt.PubKey, _ = kr.GetPublicKey(ctx)
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}
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// try to generate work with this difficulty -- runs forever
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nonceTag, _ := nip13.DoWork(ctx, evt, int(difficulty))
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evt.Tags = append(evt.Tags, nonceTag)
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mustRehashAndResign = true
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}
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if evt.Sig == "" || mustRehashAndResign {
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if numSigners := c.Uint("musig"); numSigners > 1 {
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// must do musig
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pubkeys := c.StringSlice("musig-pubkey")
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secNonce := c.String("musig-nonce-secret")
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pubNonces := c.StringSlice("musig-nonce")
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partialSigs := c.StringSlice("musig-partial")
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signed, err := performMusig(ctx,
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sec, &evt, int(numSigners), pubkeys, pubNonces, secNonce, partialSigs)
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if err != nil {
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return fmt.Errorf("musig error: %w", err)
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}
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if !signed {
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// we haven't finished signing the event, so the users still have to do more steps
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// instructions for what to do should have been printed by the performMusig() function
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return nil
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}
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} else if err := kr.SignEvent(ctx, &evt); err != nil {
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return fmt.Errorf("error signing with provided key: %w", err)
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}
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}
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// print event as json
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var result string
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if c.Bool("envelope") {
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j, _ := easyjson.Marshal(nostr.EventEnvelope{Event: evt})
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result = string(j)
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} else {
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j, _ := easyjson.Marshal(&evt)
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result = string(j)
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}
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stdout(result)
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// publish to relays
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successRelays := make([]string, 0, len(relays))
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if len(relays) > 0 {
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os.Stdout.Sync()
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for _, relay := range relays {
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publish:
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log("publishing to %s... ", relay.URL)
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ctx, cancel := context.WithTimeout(ctx, 10*time.Second)
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defer cancel()
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err := relay.Publish(ctx, evt)
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if err == nil {
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// published fine
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log("success.\n")
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successRelays = append(successRelays, relay.URL)
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continue // continue to next relay
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}
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// error publishing
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if strings.HasPrefix(err.Error(), "msg: auth-required:") && kr != nil && doAuth {
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// if the relay is requesting auth and we can auth, let's do it
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pk, _ := kr.GetPublicKey(ctx)
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log("performing auth as %s... ", pk)
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if err := relay.Auth(ctx, func(authEvent *nostr.Event) error {
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return kr.SignEvent(ctx, authEvent)
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}); err == nil {
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// try to publish again, but this time don't try to auth again
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doAuth = false
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goto publish
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} else {
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log("auth error: %s. ", err)
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}
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}
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log("failed: %s\n", err)
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}
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if len(successRelays) > 0 && c.Bool("nevent") {
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nevent, _ := nip19.EncodeEvent(evt.ID, successRelays, evt.PubKey)
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log(nevent + "\n")
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}
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}
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}
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exitIfLineProcessingError(ctx)
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return nil
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},
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}
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