@colony/colony-event-metadata-parser NPM

Colony Event Metadata Parser

Metadata format versions ColonyDapp should support legacy Metadata formats. Therefore, when parsing (in ColonyDapp) it is necessary to check the Metadata format version and support V1 & later versions.

const metadataVersion = getEventMetadataVersion(ipfsMetadata);
if (metadataVersion === 1) {
/*
* original metadata format
*/
...
}
else {
/*
* new metadata format
*/
....
}

Parsing To retrieve MetaData from IPFS. (String to Object)

// Colony MetaData
const colonyMetadata = getColonyMetadataFromResponse(ipfsDataJSON);

// Domain MetaData
const domainMetadata = getDomainMetadataFromResponse(ipfsDataJSON);

// Annotation Message
const annotation = getAnnotationMsgFromResponse(ipfsDataJSON);

/////////
// Get Avatar Image
//
// First get Colony Metadata
const colonyMetadata = getColonyMetadataFromResponse(ipfsMetadata);

// Then get IPFS response from avatarHash
avatarHash = colonyMetadata?.colonyAvatarHash;
response = await ipfs.getString(avatarHash);

// Finally, get the avatar image
avatarObject = { image: getColonyAvatarImage(response) };
/////////


// Generic Misc data
// An Agreement is used as example:
const response = await ipfsWithFallback.getString(agreementHash);
const agreement = getNameValueFromMisc('agreement', response);

Deserialising Preparing Metadata to send to IPFS. (Object to String)

// Colony Metadata packed and converted to string
const metadataForIPFS = getStringForMetadataColony({
	colonyDisplayName,
	colonyAvatarHash: colonyAvatarIpfsHash
	colonyTokens,
	verifiedAddresses,
	isWhitelistActivated,
});
colonyMetadataIpfsHash = yield call(ipfsUpload, metadataForIPFS);

// Domain Metadata packed and converted to string
domainMetadataIpfsHash = yield  call(
	ipfsUpload,
	getStringForMetadataDomain({
		domainName,
		domainColor,
		domainPurpose,
}),

// Annotation message packed and converted to string
ipfsHash = yield call(
	ipfsUpload,
	getStringForMetadataAnnotation({
		annotationMsg:  annotationMessage || '',
	}),
);

// ColonyAvatarImage packed and converted to string
colonyAvatarIpfsHash = yield call(
	ipfsUpload,
	getStringForColonyAvatarImage(colonyAvatarImage),
);

// Pack and convert string to be used in a MiscMetadata
// This example uploads a whitelist agreement to IPFS
let  agreementHash = '';
if (payload.agreement) {
	const  miscMetadata = {
		name:  'agreement',
		value:  payload?.agreement,
	};
	agreementHash = yield  call(
		ipfsUpload,
		getStringForMetadataMisc(miscMetadata),
	);
}