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2026-07-13 13:34:48 +08:00

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# https://developers.facebook.com/docs/instagram-platform/webhooks/examples#message
expectedSignature = split(to_string!(.headers."x-hub-signature-256"), "=")[1]
actualSignature = encode_base16(hmac(to_string!(.body), to_string!(.secrets.SANDBOX_CLIENT_SECRET)))
if actualSignature != expectedSignature {
null
} else {
body = parse_json!(.body)
messagingEntry = body.entry[0].messaging[0]
message = messagingEntry.message
identifier = if to_bool!(message.is_echo) {
null
} else {
messagingEntry.sender.id
}
identifier
}