TON Blockchain: Tolk vs FunC Security Comparison

Introduction

TON blockchain has introduced Tolk as a modern alternative to FunC. This analysis compares the security implications of both languages for smart contract development.

Language Comparison

Security Implications

Tolk's improved type system catches many vulnerabilities at compile time that would only be discovered at runtime with FunC.

;; FunC - Type confusion possible
() recv_internal(slice in_msg_body) impure {
    int value = in_msg_body~load_uint(64);
    ;; No compile-time check if 64 bits is correct
}