fix: allow tree-shaking of errors

src/util/errors.ts

@@ -6,12 +6,14 @@ export class JOSEError extends Error {
   /**
    * A unique error code for the particular error subclass.
    */
-  static code = 'ERR_JOSE_GENERIC'
+  static get code(): string {
+    return 'ERR_JOSE_GENERIC'
+  }
 
   /**
    * A unique error code for the particular error subclass.
    */
-  code = JOSEError.code
+  code: string = 'ERR_JOSE_GENERIC'
 
   constructor(message?: string) {
     super(message)
@@ -24,9 +26,11 @@ export class JOSEError extends Error {
  * An error subclass thrown when a JWT Claim Set member validation fails.
  */
 export class JWTClaimValidationFailed extends JOSEError {
-  static code = 'ERR_JWT_CLAIM_VALIDATION_FAILED'
+  static get code(): 'ERR_JWT_CLAIM_VALIDATION_FAILED' {
+    return 'ERR_JWT_CLAIM_VALIDATION_FAILED'
+  }
 
-  code = JWTClaimValidationFailed.code
+  code = 'ERR_JWT_CLAIM_VALIDATION_FAILED'
 
   /**
    * The Claim for which the validation failed.
@@ -49,28 +53,34 @@ export class JWTClaimValidationFailed extends JOSEError {
  * An error subclass thrown when a JOSE Algorithm is not allowed per developer preference.
  */
 export class JOSEAlgNotAllowed extends JOSEError {
-  static code = 'ERR_JOSE_ALG_NOT_ALLOWED'
+  static get code(): 'ERR_JOSE_ALG_NOT_ALLOWED' {
+    return 'ERR_JOSE_ALG_NOT_ALLOWED'
+  }
 
-  code = JOSEAlgNotAllowed.code
+  code = 'ERR_JOSE_ALG_NOT_ALLOWED'
 }
 
 /**
  * An error subclass thrown when a particular feature or algorithm is not supported by this
  * implementation or JOSE in general.
  */
 export class JOSENotSupported extends JOSEError {
-  static code = 'ERR_JOSE_NOT_SUPPORTED'
+  static get code(): 'ERR_JOSE_NOT_SUPPORTED' {
+    return 'ERR_JOSE_NOT_SUPPORTED'
+  }
 
-  code = JOSENotSupported.code
+  code = 'ERR_JOSE_NOT_SUPPORTED'
 }
 
 /**
  * An error subclass thrown when a JWE ciphertext decryption fails.
  */
 export class JWEDecryptionFailed extends JOSEError {
-  static code = 'ERR_JWE_DECRYPTION_FAILED'
+  static get code(): 'ERR_JWE_DECRYPTION_FAILED' {
+    return 'ERR_JWE_DECRYPTION_FAILED'
+  }
 
-  code = JWEDecryptionFailed.code
+  code = 'ERR_JWE_DECRYPTION_FAILED'
 
   message = 'decryption operation failed'
 }
@@ -79,54 +89,66 @@ export class JWEDecryptionFailed extends JOSEError {
  * An error subclass thrown when a JWE is invalid.
  */
 export class JWEInvalid extends JOSEError {
-  static code = 'ERR_JWE_INVALID'
+  static get code(): 'ERR_JWE_INVALID' {
+    return 'ERR_JWE_INVALID'
+  }
 
-  code = JWEInvalid.code
+  code = 'ERR_JWE_INVALID'
 }
 
 /**
  * An error subclass thrown when a JWS is invalid.
  */
 export class JWSInvalid extends JOSEError {
-  static code = 'ERR_JWS_INVALID'
+  static get code(): 'ERR_JWS_INVALID' {
+    return 'ERR_JWS_INVALID'
+  }
 
-  code = JWSInvalid.code
+  code = 'ERR_JWS_INVALID'
 }
 
 /**
  * An error subclass thrown when a JWT is invalid.
  */
 export class JWTInvalid extends JOSEError {
-  static code = 'ERR_JWT_INVALID'
+  static get code(): 'ERR_JWT_INVALID' {
+    return 'ERR_JWT_INVALID'
+  }
 
-  code = JWTInvalid.code
+  code = 'ERR_JWT_INVALID'
 }
 
 /**
  * An error subclass thrown when a JWK is invalid.
  */
 export class JWKInvalid extends JOSEError {
-  static code = 'ERR_JWK_INVALID'
+  static get code(): 'ERR_JWK_INVALID' {
+    return 'ERR_JWK_INVALID'
+  }
 
-  code = JWKInvalid.code
+  code = 'ERR_JWK_INVALID'
 }
 
 /**
  * An error subclass thrown when a JWKS is invalid.
  */
 export class JWKSInvalid extends JOSEError {
-  static code = 'ERR_JWKS_INVALID'
+  static get code(): 'ERR_JWKS_INVALID' {
+    return 'ERR_JWKS_INVALID'
+  }
 
-  code = JWKSInvalid.code
+  code = 'ERR_JWKS_INVALID'
 }
 
 /**
  * An error subclass thrown when no keys match from a JWKS.
  */
 export class JWKSNoMatchingKey extends JOSEError {
-  static code = 'ERR_JWKS_NO_MATCHING_KEY'
+  static get code(): 'ERR_JWKS_NO_MATCHING_KEY' {
+    return 'ERR_JWKS_NO_MATCHING_KEY'
+  }
 
-  code = JWKSNoMatchingKey.code
+  code = 'ERR_JWKS_NO_MATCHING_KEY'
 
   message = 'no applicable key found in the JSON Web Key Set'
 }
@@ -135,9 +157,11 @@ export class JWKSNoMatchingKey extends JOSEError {
  * An error subclass thrown when multiple keys match from a JWKS.
  */
 export class JWKSMultipleMatchingKeys extends JOSEError {
-  static code = 'ERR_JWKS_MULTIPLE_MATCHING_KEYS'
+  static get code(): 'ERR_JWKS_MULTIPLE_MATCHING_KEYS' {
+    return 'ERR_JWKS_MULTIPLE_MATCHING_KEYS'
+  }
 
-  code = JWKSMultipleMatchingKeys.code
+  code = 'ERR_JWKS_MULTIPLE_MATCHING_KEYS'
 
   message = 'multiple matching keys found in the JSON Web Key Set'
 }
@@ -146,9 +170,11 @@ export class JWKSMultipleMatchingKeys extends JOSEError {
  * Timeout was reached when retrieving the JWKS response.
  */
 export class JWKSTimeout extends JOSEError {
-  static code = 'ERR_JWKS_TIMEOUT'
+  static get code(): 'ERR_JWKS_TIMEOUT' {
+    return 'ERR_JWKS_TIMEOUT'
+  }
 
-  code = JWKSTimeout.code
+  code = 'ERR_JWKS_TIMEOUT'
 
   message = 'request timed out'
 }
@@ -157,18 +183,23 @@ export class JWKSTimeout extends JOSEError {
  * An error subclass thrown when JWS signature verification fails.
  */
 export class JWSSignatureVerificationFailed extends JOSEError {
-  static code = 'ERR_JWS_SIGNATURE_VERIFICATION_FAILED'
+  static get code(): 'ERR_JWS_SIGNATURE_VERIFICATION_FAILED' {
+    return 'ERR_JWS_SIGNATURE_VERIFICATION_FAILED'
+  }
 
-  code = JWSSignatureVerificationFailed.code
+  code = 'ERR_JWS_SIGNATURE_VERIFICATION_FAILED'
 
   message = 'signature verification failed'
 }
 
 /**
  * An error subclass thrown when a JWT is expired.
  */
+// @ts-expect-error
 export class JWTExpired extends JWTClaimValidationFailed {
-  static code = 'ERR_JWT_EXPIRED'
+  static get code(): 'ERR_JWT_EXPIRED' {
+    return 'ERR_JWT_EXPIRED'
+  }
 
-  code = JWTExpired.code
+  code = 'ERR_JWT_EXPIRED'
 }