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47 lines
1.2 KiB
TypeScript
47 lines
1.2 KiB
TypeScript
import { Event } from 'nostr-tools'
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import { Meta } from '../types'
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/**
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* This function returns the signature of last signer
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* It will be used in the content of export signature's signedEvent
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*/
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const getLastSignersSig = (
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meta: Meta,
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signers: `npub1${string}`[]
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): string | null => {
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// if there're no signers then use creator's signature
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if (signers.length === 0) {
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try {
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const createSignatureEvent: Event = JSON.parse(meta.createSignature)
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return createSignatureEvent.sig
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} catch (error) {
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return null
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}
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}
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// get last signer
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const lastSigner = signers[signers.length - 1]
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// get the signature of last signer
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try {
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const lastSignatureEvent: Event = JSON.parse(meta.docSignatures[lastSigner])
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return lastSignatureEvent.sig
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} catch (error) {
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return null
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}
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}
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/**
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* Checks if all signers have signed the sigit
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* @param signers - an array of npubs of all signers from the Sigit
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* @param signedBy - an array of npubs that have signed it already
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*/
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const isFullySigned = (
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signers: `npub1${string}`[],
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signedBy: `npub1${string}`[]
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): boolean => {
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return signers.every((signer) => signedBy.includes(signer))
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}
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export { getLastSignersSig, isFullySigned }
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