Contract not compiling. "Failed to resolve: use of undeclared type `SecretKey`

Question

Here are the steps i have done:

1. cargo contract new flipper

2. in contract code i added these lines of code:

3. use blst::min_pk::SecretKey; after #![cfg_attr(not(feature = "std"), no_std)] & changed this function:

   #[ink(message)]
   pub fn flip(&mut self) {
       let ikm = [0u8; 32];
       let sk = SecretKey::key_gen(&ikm,&[]).unwrap();
       ink_env::debug_print!("{:?}",sk);
       self.value = !self.value;
   }
   

4. Run command cargo add blst

5. After the completion, my Cargo.toml file changed dependencies by adding

   blst = "0.3.10"

6. When i run: cargo+nightly contract build, i got error and warning:

7. SecretKey is a struct that can be found in blst::min_pk directory. Its a dependence that can be found on github. I can link it if need.

Any help how do i fix this error? If you need more information, just tell me and i will provide!

Here is full Cargo.toml: here is full Cargo.toml :

[package]
name = "testX"
version = "0.1.0"
authors = ["[your_name] <[your_email]>"]
edition = "2021"

[dependencies]
ink_primitives = { version = "3.3", default-features = false }
ink_metadata = { version = "3.3", default-features = false, features = ["derive"], optional = true }
ink_env = { version = "3.3", default-features = false }
ink_storage = { version = "3.3", default-features = false }
ink_lang = { version = "3.3", default-features = false }

scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
scale-info = { version = "2", default-features = false, features = ["derive"], optional = true }
blst = "0.3.10"

[lib]
name = "testX"
path = "lib.rs"
crate-type = [
    # Used for normal contract Wasm blobs.
    "cdylib",
]

[features]
default = ["std"]
std = [
    "ink_metadata/std",
    "ink_env/std",
    "ink_storage/std",
    "ink_primitives/std",
    "scale/std",
    "scale-info/std",
]
ink-as-dependency = []

Answer 1

this specific error display if you are adding use blst::min_pk::SecretKey; outside mod instead put inside mod flipper { use blst::min_pk::*; } but still this also throws duplicate lang item in crate 'std' error, have a look here for further error