terra-rust-api 1.2.20

use crate::errors::TerraRustAPIError;
use crypto::sha2::Sha256;
use secp256k1::Message;
use secp256k1::Secp256k1;

use crypto::digest::Digest;

pub struct Signature {}
impl Signature {
    pub fn verify<C: secp256k1::Verification + secp256k1::Context>(
        secp: &Secp256k1<C>,
        pub_key: &str,
        signature: &str,
        blob: &str,
    ) -> Result<(), TerraRustAPIError> {
        let public = base64::decode(pub_key)?;
        let sig = base64::decode(signature)?;
        let pk = secp256k1::PublicKey::from_slice(public.as_slice())?;
        let mut sha = Sha256::new();
        let mut sha_result: [u8; 32] = [0; 32];
        sha.input_str(blob);
        sha.result(&mut sha_result);

        let message: Message = Message::from_slice(&sha_result)?;
        let secp_sig = secp256k1::Signature::from_compact(sig.as_slice())?;
        secp.verify(&message, &secp_sig, &pk)?;
        Ok(())
    }
}
#[cfg(test)]
mod tst {
    use super::*;
    #[allow(unused_imports)]
    use dotenv::dotenv;
    #[allow(unused_imports)]
    use env_logger;
    #[test]
    pub fn test_verify() -> anyhow::Result<()> {
        let secp = Secp256k1::new();

        let message = r#"{"account_number":"45","chain_id":"columbus-3-testnet","fee":{"amount":[{"amount":"698","denom":"uluna"}],"gas":"46467"},"memo":"","msgs":[{"type":"bank/MsgSend","value":{"amount":[{"amount":"100000000","denom":"uluna"}],"from_address":"terra1n3g37dsdlv7ryqftlkef8mhgqj4ny7p8v78lg7","to_address":"terra1wg2mlrxdmnnkkykgqg4znky86nyrtc45q336yv"}}],"sequence":"0"}"#;
        let signature = "FJKAXRxNB5ruqukhVqZf3S/muZEUmZD10fVmWycdVIxVWiCXXFsUy2VY2jINEOUGNwfrqEZsT2dUfAvWj8obLg==";
        let pub_key = "AiMzHaA2bvnDXfHzkjMM+vkSE/p0ymBtAFKUnUtQAeXe";
        Signature::verify(&secp, pub_key, signature, message)?;
        Ok(())
    }
}