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import * as AsyncLRU from 'async-lru'
import * as jsonld from 'jsonld'
import { logger } from './logger'
const CACHE = {
'https://w3id.org/security/v1': {
'@context': {
id: '@id',
type: '@type',
dc: 'http://purl.org/dc/terms/',
sec: 'https://w3id.org/security#',
xsd: 'http://www.w3.org/2001/XMLSchema#',
EcdsaKoblitzSignature2016: 'sec:EcdsaKoblitzSignature2016',
Ed25519Signature2018: 'sec:Ed25519Signature2018',
EncryptedMessage: 'sec:EncryptedMessage',
GraphSignature2012: 'sec:GraphSignature2012',
LinkedDataSignature2015: 'sec:LinkedDataSignature2015',
LinkedDataSignature2016: 'sec:LinkedDataSignature2016',
CryptographicKey: 'sec:Key',
authenticationTag: 'sec:authenticationTag',
canonicalizationAlgorithm: 'sec:canonicalizationAlgorithm',
cipherAlgorithm: 'sec:cipherAlgorithm',
cipherData: 'sec:cipherData',
cipherKey: 'sec:cipherKey',
created: { '@id': 'dc:created', '@type': 'xsd:dateTime' },
creator: { '@id': 'dc:creator', '@type': '@id' },
digestAlgorithm: 'sec:digestAlgorithm',
digestValue: 'sec:digestValue',
domain: 'sec:domain',
encryptionKey: 'sec:encryptionKey',
expiration: { '@id': 'sec:expiration', '@type': 'xsd:dateTime' },
expires: { '@id': 'sec:expiration', '@type': 'xsd:dateTime' },
initializationVector: 'sec:initializationVector',
iterationCount: 'sec:iterationCount',
nonce: 'sec:nonce',
normalizationAlgorithm: 'sec:normalizationAlgorithm',
owner: { '@id': 'sec:owner', '@type': '@id' },
password: 'sec:password',
privateKey: { '@id': 'sec:privateKey', '@type': '@id' },
privateKeyPem: 'sec:privateKeyPem',
publicKey: { '@id': 'sec:publicKey', '@type': '@id' },
publicKeyBase58: 'sec:publicKeyBase58',
publicKeyPem: 'sec:publicKeyPem',
publicKeyWif: 'sec:publicKeyWif',
publicKeyService: { '@id': 'sec:publicKeyService', '@type': '@id' },
revoked: { '@id': 'sec:revoked', '@type': 'xsd:dateTime' },
salt: 'sec:salt',
signature: 'sec:signature',
signatureAlgorithm: 'sec:signingAlgorithm',
signatureValue: 'sec:signatureValue'
}
}
}
const nodeDocumentLoader = jsonld.documentLoaders.node()
const lru = new AsyncLRU({
max: 10,
load: (url, cb) => {
if (CACHE[url] !== undefined) {
logger.debug('Using cache for JSON-LD %s.', url)
return cb(null, {
contextUrl: null,
document: CACHE[url],
documentUrl: url
})
}
nodeDocumentLoader(url)
.then(value => cb(null, value))
.catch(err => cb(err))
}
})
jsonld.documentLoader = (url) => {
return new Promise((res, rej) => {
lru.get(url, (err, value) => {
if (err) return rej(err)
return res(value)
})
})
}
export { jsonld }
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