Supabase•4mo ago•

41 replies

Auth Hook for Email Confirmation Not Working - Base64Decoding Error

edge functions

auth

Issue Summary
I'm trying to set up email confirmation using Supabase Auth Hooks with a custom Edge Function (

send-confirmation-email

send-confirmation-email

), but getting a persistent

hook_timeout

hook_timeout

error during user signup. The Edge Function logs show:

Error: Base64Coder: incorrect characters for decoding

Error: Base64Coder: incorrect characters for decoding

when trying to verify the webhook signature.

Setup Details

1. Auth Hook Configuration (

Authentication → Hooks → Send email

Authentication → Hooks → Send email

)
- HTTP Method: POST
- HTTP URL:

https://{projectId}.supabase.co/functions/v1/send-confirmation-email

https://{projectId}.supabase.co/functions/v1/send-confirmation-email

- Secret: Generated using "Generate a secret" button (format:

whsec_xxxxxxxxxxxxx

whsec_xxxxxxxxxxxxx

)
- Events: "Validate" checked

2. Auth Provider Configuration (

Authentication → Providers → Email

Authentication → Providers → Email

)
- Email provider enabled
- "Confirm email" enabled
- "Secure email change" enabled

3. Edge Function Configuration (

Project Settings → Edge Functions

Project Settings → Edge Functions

)
-

SEND_CONFIRMATION_EMAIL_HOOK_SECRET

SEND_CONFIRMATION_EMAIL_HOOK_SECRET

secret added
- Contains the exact same

whsec_xxxxxxxxxxxxx

whsec_xxxxxxxxxxxxx

value from Auth Hook configuration
- No extra whitespace or line breaks
- Waited 2-3 minutes after updating before testing

4. supabase/config.toml

[functions.send-confirmation-email]
verify_jwt = false

[auth.email]
enable_signup = true
enable_confirmations = true

[functions.send-confirmation-email]
verify_jwt = false

[auth.email]
enable_signup = true
enable_confirmations = true

Error Details

User-facing error:

{
    "code": "hook_timeout",
    "message": "Failed to reach hook within maximum time of 5.000000 seconds"
}

{
    "code": "hook_timeout",
    "message": "Failed to reach hook within maximum time of 5.000000 seconds"
}

Edge Function logs (most recent):

Error in send-confirmation-email function: Error: Base64Coder: incorrect characters for decoding
    at r.decode (https://esm.sh/@stablelib/base64@1.0.1/es2022/base64.mjs:2:2488)
    at Object.j [as decode] (https://esm.sh/@stablelib/base64@1.0.1/es2022/base64.mjs:2:3218)
    at new t (https://esm.sh/standardwebhooks@1.0.0/es2022/standardwebhooks.mjs:3:2086)
    at Object.handler (file:///tmp/user_fn_buaqpwzeebdronqkvcvx_78bb3461-bc0b-4d80-80c2-3ea1e24be113_4/source/supabase/functions/send-confirmation-email/index.ts:18:16)

Error in send-confirmation-email function: Error: Base64Coder: incorrect characters for decoding
    at r.decode (https://esm.sh/@stablelib/base64@1.0.1/es2022/base64.mjs:2:2488)
    at Object.j [as decode] (https://esm.sh/@stablelib/base64@1.0.1/es2022/base64.mjs:2:3218)
    at new t (https://esm.sh/standardwebhooks@1.0.0/es2022/standardwebhooks.mjs:3:2086)
    at Object.handler (file:///tmp/user_fn_buaqpwzeebdronqkvcvx_78bb3461-bc0b-4d80-80c2-3ea1e24be113_4/source/supabase/functions/send-confirmation-email/index.ts:18:16)

Auth Hook for Email Confirmation Not Working - Base64Decoding Error

edge functions

auth

Issue Summary
I'm trying to set up email confirmation using Supabase Auth Hooks with a custom Edge Function (

send-confirmation-email

send-confirmation-email

), but getting a persistent

hook_timeout

hook_timeout

error during user signup. The Edge Function logs show:

Error: Base64Coder: incorrect characters for decoding

Error: Base64Coder: incorrect characters for decoding

when trying to verify the webhook signature.

Setup Details

1. Auth Hook Configuration (

Authentication → Hooks → Send email

Authentication → Hooks → Send email

)
- HTTP Method: POST
- HTTP URL:

https://{projectId}.supabase.co/functions/v1/send-confirmation-email

https://{projectId}.supabase.co/functions/v1/send-confirmation-email

- Secret: Generated using "Generate a secret" button (format:

whsec_xxxxxxxxxxxxx

whsec_xxxxxxxxxxxxx

)
- Events: "Validate" checked

2. Auth Provider Configuration (

Authentication → Providers → Email

Authentication → Providers → Email

)
- Email provider enabled
- "Confirm email" enabled
- "Secure email change" enabled

3. Edge Function Configuration (

Project Settings → Edge Functions

Project Settings → Edge Functions

)
-

SEND_CONFIRMATION_EMAIL_HOOK_SECRET

SEND_CONFIRMATION_EMAIL_HOOK_SECRET

secret added
- Contains the exact same

whsec_xxxxxxxxxxxxx

whsec_xxxxxxxxxxxxx

value from Auth Hook configuration
- No extra whitespace or line breaks
- Waited 2-3 minutes after updating before testing

4. supabase/config.toml

[functions.send-confirmation-email]
verify_jwt = false

[auth.email]
enable_signup = true
enable_confirmations = true

[functions.send-confirmation-email]
verify_jwt = false

[auth.email]
enable_signup = true
enable_confirmations = true

Error Details

User-facing error:

{
    "code": "hook_timeout",
    "message": "Failed to reach hook within maximum time of 5.000000 seconds"
}

{
    "code": "hook_timeout",
    "message": "Failed to reach hook within maximum time of 5.000000 seconds"
}

Edge Function logs (most recent):

Error in send-confirmation-email function: Error: Base64Coder: incorrect characters for decoding
    at r.decode (https://esm.sh/@stablelib/base64@1.0.1/es2022/base64.mjs:2:2488)
    at Object.j [as decode] (https://esm.sh/@stablelib/base64@1.0.1/es2022/base64.mjs:2:3218)
    at new t (https://esm.sh/standardwebhooks@1.0.0/es2022/standardwebhooks.mjs:3:2086)
    at Object.handler (file:///tmp/user_fn_buaqpwzeebdronqkvcvx_78bb3461-bc0b-4d80-80c2-3ea1e24be113_4/source/supabase/functions/send-confirmation-email/index.ts:18:16)

Error in send-confirmation-email function: Error: Base64Coder: incorrect characters for decoding
    at r.decode (https://esm.sh/@stablelib/base64@1.0.1/es2022/base64.mjs:2:2488)
    at Object.j [as decode] (https://esm.sh/@stablelib/base64@1.0.1/es2022/base64.mjs:2:3218)
    at new t (https://esm.sh/standardwebhooks@1.0.0/es2022/standardwebhooks.mjs:3:2086)
    at Object.handler (file:///tmp/user_fn_buaqpwzeebdronqkvcvx_78bb3461-bc0b-4d80-80c2-3ea1e24be113_4/source/supabase/functions/send-confirmation-email/index.ts:18:16)

Auth Hook for Email Confirmation Not Working - Base64Decoding Error

Error Details

Auth Hook for Email Confirmation Not Working - Base64Decoding Error

Error Details

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