DIAMOND How To Bypass JA4 Fingerprinting via "CFFI" Impersonation

[TheMekanic]

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In 2026, JA3 is outdated. Most high-end WAFs (DataDome, Akamai) now use JA4, which looks at TLS versions, Cipher suites, and extensions in a specific order.
LoliCode Block:
C#

Code:

// Use curl_cffi to impersonate a specific Chrome 145/146 build
BLOCK:HttpRequest
  url = "https://protected-site.com/api/v1/auth"
  method = POST
  // Set the impersonate flag to 'chrome131' or newer for JA4 alignment
  customHeaders = {
    {"X-Impersonate", "chrome145"},
    {"sec-ch-ua", "\"Not(A:Brand\";v=\"99\", \"Google Chrome\";v=\"145\""}
  }
  content = "{\"user\":\"<USER>\",\"pass\":\"<PASS>\"}"
ENDBLOCK