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import { isCloudflareWorkers } from './env.ts'import { JOSENotSupported } from '../util/errors.ts'
export default function subtleDsa(alg: string, algorithm: KeyAlgorithm | EcKeyAlgorithm) {  const hash = `SHA-${alg.slice(-3)}`  switch (alg) {    case 'HS256':    case 'HS384':    case 'HS512':      return { hash, name: 'HMAC' }    case 'PS256':    case 'PS384':    case 'PS512':      // @ts-expect-error      return { hash, name: 'RSA-PSS', saltLength: alg.slice(-3) >> 3 }    case 'RS256':    case 'RS384':    case 'RS512':      return { hash, name: 'RSASSA-PKCS1-v1_5' }    case 'ES256':    case 'ES384':    case 'ES512':      return { hash, name: 'ECDSA', namedCurve: (<EcKeyAlgorithm>algorithm).namedCurve }    case isCloudflareWorkers() && 'EdDSA':      const { namedCurve } = <EcKeyAlgorithm>algorithm      return <EcKeyAlgorithm>{ name: namedCurve, namedCurve }    default:      throw new JOSENotSupported(        `alg ${alg} is not supported either by JOSE or your javascript runtime`,      )  }}