Constant bitcoin::consensus::encode::MAX_VEC_SIZE   
pub const MAX_VEC_SIZE: usize = 4000000; // 4_000_000usizeExpand description
Maximum size, in bytes, of a vector we are allowed to decode.
pub const MAX_VEC_SIZE: usize = 4000000; // 4_000_000usizeMaximum size, in bytes, of a vector we are allowed to decode.