@sphereon/ssi-sdk-ext.identifier-resolution/src/types/common.ts

import type { ICoseKeyJson, JWK } from '@sphereon/ssi-types'
import type { IIdentifier, IKey } from '@veramo/core'
import type { ExternalIdentifierType } from './externalIdentifierTypes'
import type { ManagedIdentifierType } from './managedIdentifierTypes'

export interface JwkInfo {
  jwk: JWK
  jwkThumbprint: string
}

export function isDidIdentifier(identifier: ManagedIdentifierType | ExternalIdentifierType): identifier is IIdentifier | string {
  return isIIdentifier(identifier) || (typeof identifier === 'string' && identifier.startsWith('did:'))
}

export function isIIdentifier(identifier: ManagedIdentifierType | ExternalIdentifierType): identifier is IIdentifier {
  return typeof identifier === 'object' && !Array.isArray(identifier) && 'did' in identifier && 'keys' in identifier
}

export function isJwkIdentifier(identifier: ManagedIdentifierType | ExternalIdentifierType): identifier is JWK {
  return typeof identifier === 'object' && !Array.isArray(identifier) && 'kty' in identifier
}

export function isOidcDiscoveryIdentifier(identifier: ManagedIdentifierType | ExternalIdentifierType): identifier is string {
  return typeof identifier === 'string' && identifier.startsWith('http') && identifier.endsWith('/.well-known/openid-configuration')
}

export function isJwksUrlIdentifier(identifier: ManagedIdentifierType | ExternalIdentifierType): identifier is string {
  return typeof identifier === 'string' && identifier.startsWith('http') && identifier.endsWith('jwks.json')
}

export function isKidIdentifier(identifier: ManagedIdentifierType | ExternalIdentifierType): identifier is string {
  return typeof identifier === 'string' && !identifier.startsWith('did:') && !identifier.startsWith('http')
}

export function isOID4VCIssuerIdentifier(identifier: ManagedIdentifierType | ExternalIdentifierType): identifier is string {
  return typeof identifier === 'string' && identifier.startsWith('http') && identifier.endsWith('/.well-known/openid-credential-issuer')
}

export function isKeyIdentifier(identifier: ManagedIdentifierType): identifier is IKey {
  return (
    typeof identifier === 'string' &&
    !Array.isArray(identifier) &&
    typeof identifier === 'object' &&
    `kid` in identifier &&
    'publicKeyHex' in identifier
  )
}

export function isCoseKeyIdentifier(identifier: ManagedIdentifierType): identifier is ICoseKeyJson {
  return typeof identifier === 'object' && `kty` in identifier && ('baseIV' in identifier || 'x5chain' in identifier) && !('x5c' in identifier)
}

export function isOIDFEntityIdIdentifier(identifier: ManagedIdentifierType): identifier is string {
  return typeof identifier === 'string' && identifier.startsWith('https://')
}

export function isX5cIdentifier(identifier: ManagedIdentifierType | ExternalIdentifierType): identifier is string[] {
  return Array.isArray(identifier) && identifier.length > 0 // todo: Do we want to do additional validation? We know it must be DER and thus hex for instance
}