Helpers

applesauce-core comes with a bunch of methods to get data from events

WARNING

Some helper methods my throw errors. so make sure to have error handling and use the isValid* helpers to filter out invalid events

Events

• isEvent Checks if an object is a nostr event
• markFromCache Marks an event as being from the cache
• isFromCache Checks if an event is marked from cache
• getTagValue Gets the value of the first tag matching the name
• getIndexableTags Get a Set of all indexable tags on the event

Profiles

• getProfileContent Returns the parsed profile content for a kind 0 event
• isValidProfile Checks if the content of the kind 0 event is valid JSON

Mailboxes

• getInboxes Gets the inbox relays from a 10002 event
• getOutboxes Gets the outbox relays from a 10002 event

Event relays

• addSeenRelay Adds a relay to the list of relay the event was seen on
• getSeenRelays Get the list of relays this event was seen on

Zaps

• isValidZap Checks if an event is a valid zap and can be parsed
• getZapSender Gets the senders pubkey
• getZapRecipient Gets the pubkey of the user who received the zap
• getZapPayment Gets the parsed bolt11 invoice
• getZapAddressPointer Gets the address pointer of the zap
• getZapEventPointer Gets the event pointer of the zap
• getZapRequest Gets the zap request event inside the zap event

Lightning

• parseBolt11 Parses a bolt11 lightning invoice
• parseLNURLOrAddress Parses a LNURL or lightning address into a LNURLp

Pointers

• getEventPointerFromTag Creates an EventPointer from a standard "e" tag
• getAddressPointerFromTag Creates an AddressPointer from a standard "a" tag
• getProfilePointerFromTag Creates an ProfilePointer from a standard "p" tag

Delete events

• getDeleteIds Gets a list of referenced event ids
• getDeleteCoordinates Get the list of replaceable event coordinates the event is referencing
• createDeleteEvent Creates a draft delete event for a list of events

Emojis

• getPackName Gets the emoji pack name
• getEmojis Get all emojis in an emoji pack
• getEmojiTag CGets an "emoji" tag that matches an emoji code

URLs

• getURLFilename returns the filename part fo the path in a URL
• isAudioURL Checks if the URL ends with a audio file extension
• isVideoURL Checks if the URL ends with a video file extension
• isImageURL Checks if the URL ends with a image file extension
• isStreamURL Checks if the URL ends with a stream file extension

Tags

• isETag Checks if tag is an "e" tag and has at least one value
• isATag Checks if tag is an "a" tag and has at least one value
• isPTag Checks if tag is an "p" tag and has at least one value
• isDTag Checks if tag is an "d" tag and has at least one value
• isRTag Checks if tag is an "r" tag and has at least one value
• isTTag Checks if tag is an "t" tag and has at least one value

Hidden Tags

Hidden tags are used in NIP-51 lists and NIP-60 wallets

• canHaveHiddenTags Checks if a given event kind can have hidden tags
• hasHiddenTags Checks if an event has hidden tags
• getHiddenTags Returns the hidden tags for an event if they are unlocked
• isHiddenTagsLocked Checks if the hidden tags are locked
• unlockHiddenTags Unlocks the hidden tags using a signer
• overrideHiddenTags Replaces an events hidden tags
• modifyEventTags Modifies an events public or hidden tags

Filters

• isFilterEqual Check if two filters are equal

Time

• unixNow Returns the current unix timestamp