@sphereon/pex
Version:
A Typescript implementation of the v1 and v2 DIF Presentation Exchange specification
72 lines • 8.13 kB
JavaScript
import { CredentialMapper } from '@sphereon/ssi-types';
import { PEVersion } from '../types';
import validatePDv1 from '../validation/validatePDv1.js';
import validatePDv2 from '../validation/validatePDv2.js';
import { ObjectUtils } from './ObjectUtils';
import { JsonPathUtils } from './jsonPathUtils';
export function getSubjectIdsAsString(vc) {
if (CredentialMapper.isSdJwtDecodedCredential(vc)) {
// TODO: should we also handle `cnf` claim?
return vc.signedPayload.sub ? [vc.signedPayload.sub] : [];
}
const subjects = Array.isArray(vc.credentialSubject) ? vc.credentialSubject : [vc.credentialSubject];
return subjects.filter((s) => !!s.id).map((value) => value.id);
}
export function getIssuerString(vc) {
if (CredentialMapper.isSdJwtDecodedCredential(vc)) {
return vc.signedPayload.iss;
}
return ObjectUtils.isString(vc.issuer) ? vc.issuer : vc.issuer.id;
}
export function definitionVersionDiscovery(presentationDefinition) {
const presentationDefinitionCopy = JSON.parse(JSON.stringify(presentationDefinition));
JsonPathUtils.changePropertyNameRecursively(presentationDefinitionCopy, '_const', 'const');
JsonPathUtils.changePropertyNameRecursively(presentationDefinitionCopy, '_enum', 'enum');
const data = { presentation_definition: presentationDefinitionCopy };
if (validatePDv2(data)) {
return { version: PEVersion.v2 };
}
const v2Errors = validatePDv2.errors ?? undefined;
if (validatePDv1(data)) {
return { version: PEVersion.v1 };
}
const v1Errors = validatePDv1.errors ?? undefined;
return {
error: 'This is not a valid PresentationDefinition',
v1Errors,
v2Errors,
};
}
export function formatValidationError(error) {
return `${error.instancePath || '/'}: ${error.message}${error.params.additionalProperty ? ` (${error.params.additionalProperty})` : ''}`;
}
export function formatValidationErrors(errors) {
if (!errors?.length) {
return undefined;
}
return errors.map(formatValidationError).join('\n ');
}
export function uniformDIDMethods(dids, opts) {
let result = dids?.map((did) => did.toLowerCase()).map((did) => (did.startsWith('did:') ? did : `did:${did}`)) ?? [];
if (opts?.removePrefix) {
const length = opts.removePrefix.endsWith(':') ? opts.removePrefix.length : opts.removePrefix.length + 1;
result = result.map((did) => (did.startsWith(opts.removePrefix) ? did.substring(length) : did));
}
if (result.includes('did')) {
// The string did denotes every DID method, hence we return an empty array, indicating all methods are supported
return [];
}
return result;
}
export function isRestrictedDID(DID, restrictToDIDMethods) {
const methods = uniformDIDMethods(restrictToDIDMethods);
return methods.length === 0 || methods.some((method) => DID.toLowerCase().startsWith(method));
}
export function filterToRestrictedDIDs(DIDs, restrictToDIDMethods) {
const methods = uniformDIDMethods(restrictToDIDMethods);
if (methods.length === 0) {
return DIDs;
}
return methods.flatMap((method) => DIDs.filter((DID) => DID.toLowerCase().startsWith(method)));
}
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