Feature/expose validator cosmos address (#1404)

* Move coconut validator api req out of coconut interface

and expose a new cosmos-address endpoint

* Finish cosmos address endpoint

* Guard under coconut feature gateway & validator-api code

* Update CHANGELOG

validator-api/validator-api-requests/src/coconut.rs

@@ -0,0 +1,186 @@
+// Copyright 2022 - Nym Technologies SA <contact@nymtech.net>
+// SPDX-License-Identifier: Apache-2.0
+
+use cosmrs::AccountId;
+use getset::{CopyGetters, Getters};
+use serde::{Deserialize, Serialize};
+
+use coconut_interface::{
+    error::CoconutInterfaceError, Attribute, Base58, BlindSignRequest, Credential, VerificationKey,
+};
+
+#[derive(Serialize, Deserialize, Getters, CopyGetters)]
+pub struct VerifyCredentialBody {
+    #[getset(get = "pub")]
+    credential: Credential,
+    #[getset(get = "pub")]
+    proposal_id: u64,
+}
+
+impl VerifyCredentialBody {
+    pub fn new(credential: Credential, proposal_id: u64) -> VerifyCredentialBody {
+        VerifyCredentialBody {
+            credential,
+            proposal_id,
+        }
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct VerifyCredentialResponse {
+    pub verification_result: bool,
+}
+
+impl VerifyCredentialResponse {
+    pub fn new(verification_result: bool) -> Self {
+        VerifyCredentialResponse {
+            verification_result,
+        }
+    }
+}
+
+//  All strings are base58 encoded representations of structs
+#[derive(Clone, Serialize, Deserialize, Debug, Getters, CopyGetters)]
+pub struct BlindSignRequestBody {
+    #[getset(get = "pub")]
+    blind_sign_request: BlindSignRequest,
+    #[getset(get = "pub")]
+    tx_hash: String,
+    #[getset(get = "pub")]
+    signature: String,
+    public_attributes: Vec<String>,
+    #[getset(get = "pub")]
+    public_attributes_plain: Vec<String>,
+    #[getset(get = "pub")]
+    total_params: u32,
+}
+
+impl BlindSignRequestBody {
+    pub fn new(
+        blind_sign_request: &BlindSignRequest,
+        tx_hash: String,
+        signature: String,
+        public_attributes: &[Attribute],
+        public_attributes_plain: Vec<String>,
+        total_params: u32,
+    ) -> BlindSignRequestBody {
+        BlindSignRequestBody {
+            blind_sign_request: blind_sign_request.clone(),
+            tx_hash,
+            signature,
+            public_attributes: public_attributes
+                .iter()
+                .map(|attr| attr.to_bs58())
+                .collect(),
+            public_attributes_plain,
+            total_params,
+        }
+    }
+
+    pub fn public_attributes(&self) -> Vec<Attribute> {
+        self.public_attributes
+            .iter()
+            .map(|x| Attribute::try_from_bs58(x).unwrap())
+            .collect()
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct BlindedSignatureResponse {
+    pub remote_key: [u8; 32],
+    pub encrypted_signature: Vec<u8>,
+}
+
+impl BlindedSignatureResponse {
+    pub fn new(encrypted_signature: Vec<u8>, remote_key: [u8; 32]) -> BlindedSignatureResponse {
+        BlindedSignatureResponse {
+            encrypted_signature,
+            remote_key,
+        }
+    }
+
+    pub fn to_base58_string(&self) -> String {
+        bs58::encode(&self.to_bytes()).into_string()
+    }
+
+    pub fn from_base58_string<I: AsRef<[u8]>>(val: I) -> Result<Self, CoconutInterfaceError> {
+        let bytes = bs58::decode(val).into_vec()?;
+        Self::from_bytes(&bytes)
+    }
+
+    pub fn to_bytes(&self) -> Vec<u8> {
+        let mut bytes = self.remote_key.to_vec();
+        bytes.extend_from_slice(&self.encrypted_signature);
+        bytes
+    }
+
+    pub fn from_bytes(bytes: &[u8]) -> Result<Self, CoconutInterfaceError> {
+        if bytes.len() < 32 {
+            return Err(CoconutInterfaceError::InvalidByteLength(bytes.len(), 32));
+        }
+        let mut remote_key = [0u8; 32];
+        remote_key.copy_from_slice(&bytes[..32]);
+        let encrypted_signature = bytes[32..].to_vec();
+        Ok(BlindedSignatureResponse {
+            remote_key,
+            encrypted_signature,
+        })
+    }
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct VerificationKeyResponse {
+    pub key: VerificationKey,
+}
+
+impl VerificationKeyResponse {
+    pub fn new(key: VerificationKey) -> VerificationKeyResponse {
+        VerificationKeyResponse { key }
+    }
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct CosmosAddressResponse {
+    pub addr: AccountId,
+}
+
+impl CosmosAddressResponse {
+    pub fn new(addr: AccountId) -> CosmosAddressResponse {
+        CosmosAddressResponse { addr }
+    }
+}
+
+#[derive(Serialize, Deserialize, Getters, CopyGetters)]
+pub struct ProposeReleaseFundsRequestBody {
+    #[getset(get = "pub")]
+    credential: Credential,
+}
+
+impl ProposeReleaseFundsRequestBody {
+    pub fn new(credential: Credential) -> Self {
+        ProposeReleaseFundsRequestBody { credential }
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct ProposeReleaseFundsResponse {
+    pub proposal_id: u64,
+}
+
+impl ProposeReleaseFundsResponse {
+    pub fn new(proposal_id: u64) -> Self {
+        ProposeReleaseFundsResponse { proposal_id }
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize, Getters, CopyGetters)]
+pub struct ExecuteReleaseFundsRequestBody {
+    #[getset(get = "pub")]
+    proposal_id: u64,
+}
+
+impl ExecuteReleaseFundsRequestBody {
+    pub fn new(proposal_id: u64) -> Self {
+        ExecuteReleaseFundsRequestBody { proposal_id }
+    }
+}

validator-api/validator-api-requests/src/lib.rs

@@ -1,4 +1,6 @@
 // Copyright 2022 - Nym Technologies SA <contact@nymtech.net>
 // SPDX-License-Identifier: Apache-2.0
 
+#[cfg(feature = "coconut")]
+pub mod coconut;
 pub mod models;