33 lines
863 B
TypeScript
33 lines
863 B
TypeScript
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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 = (meta: Meta, signers: `npub1${string}`[]): 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(
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meta.docSignatures[lastSigner]
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)
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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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export { getLastSignersSig }
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