[r2r] get_current_mtp rpc impl (#1340)

* implemented get_current_mtp rpc && test

* fmt fix

* fix wasm

* reitration

* better error namings

* review fixes

* adjusted get mtp test

* remove test_get_current_mtp from wasm target

* Improved unit test with Mm2TestConf

mm2src/coins/rpc_command/get_current_mtp.rs

@@ -0,0 +1,72 @@
+use common::{HttpStatusCode, StatusCode};
+use derive_more::Display;
+use mm2_core::mm_ctx::MmArc;
+use mm2_err_handle::prelude::MmError;
+
+use crate::{lp_coinfind_or_err,
+            utxo::{rpc_clients::UtxoRpcError, UtxoCommonOps},
+            CoinFindError, MmCoinEnum};
+
+pub type GetCurrentMtpRpcResult<T> = Result<T, MmError<GetCurrentMtpError>>;
+
+#[derive(Deserialize)]
+pub struct GetCurrentMtpRequest {
+    coin: String,
+}
+
+#[derive(Serialize)]
+pub struct GetCurrentMtpResponse {
+    mtp: u32,
+}
+
+#[derive(Serialize, Display, SerializeErrorType)]
+#[serde(tag = "error_type", content = "error_data")]
+pub enum GetCurrentMtpError {
+    NoSuchCoin(String),
+    #[display(fmt = "Requested coin: {}; is not supported for this action.", _0)]
+    NotSupportedCoin(String),
+    RpcError(String),
+}
+
+impl HttpStatusCode for GetCurrentMtpError {
+    fn status_code(&self) -> StatusCode {
+        match self {
+            GetCurrentMtpError::NoSuchCoin(_) => StatusCode::PRECONDITION_REQUIRED,
+            GetCurrentMtpError::NotSupportedCoin(_) => StatusCode::BAD_REQUEST,
+            GetCurrentMtpError::RpcError(_) => StatusCode::INTERNAL_SERVER_ERROR,
+        }
+    }
+}
+
+impl From<UtxoRpcError> for GetCurrentMtpError {
+    fn from(err: UtxoRpcError) -> Self { Self::RpcError(err.to_string()) }
+}
+
+impl From<CoinFindError> for GetCurrentMtpError {
+    fn from(err: CoinFindError) -> Self { Self::NoSuchCoin(err.to_string()) }
+}
+
+pub async fn get_current_mtp_rpc(
+    ctx: MmArc,
+    req: GetCurrentMtpRequest,
+) -> GetCurrentMtpRpcResult<GetCurrentMtpResponse> {
+    match lp_coinfind_or_err(&ctx, &req.coin).await? {
+        MmCoinEnum::UtxoCoin(utxo) => Ok(GetCurrentMtpResponse {
+            mtp: utxo.get_current_mtp().await?,
+        }),
+        MmCoinEnum::QtumCoin(qtum) => Ok(GetCurrentMtpResponse {
+            mtp: qtum.get_current_mtp().await?,
+        }),
+        MmCoinEnum::Qrc20Coin(qrc) => Ok(GetCurrentMtpResponse {
+            mtp: qrc.get_current_mtp().await?,
+        }),
+        #[cfg(not(target_arch = "wasm32"))]
+        MmCoinEnum::ZCoin(zcoin) => Ok(GetCurrentMtpResponse {
+            mtp: zcoin.get_current_mtp().await?,
+        }),
+        MmCoinEnum::Bch(bch) => Ok(GetCurrentMtpResponse {
+            mtp: bch.get_current_mtp().await?,
+        }),
+        _ => Err(MmError::new(GetCurrentMtpError::NotSupportedCoin(req.coin))),
+    }
+}

mm2src/coins/rpc_command/mod.rs

@@ -1,4 +1,5 @@
 pub mod account_balance;
+pub mod get_current_mtp;
 pub mod hd_account_balance_rpc_error;
 pub mod init_create_account;
 pub mod init_scan_for_new_addresses;

mm2src/mm2_main/src/mm2_tests.rs

@@ -6790,6 +6790,45 @@ fn test_mm2_db_migration() {
     .unwrap();
 }
 
+#[test]
+#[cfg(not(target_arch = "wasm32"))]
+fn test_get_current_mtp() {
+    use mm2_test_helpers::for_tests::Mm2TestConf;
+
+    // KMD coin config used for this test
+    let coins = json!([
+        {"coin":"KMD","txversion":4,"overwintered":1,"txfee":10000,"protocol":{"type":"UTXO"}},
+    ]);
+    let passphrase = "cMhHM3PMpMrChygR4bLF7QsTdenhWpFrrmf2UezBG3eeFsz41rtL";
+
+    let conf = Mm2TestConf::seednode(&passphrase, &coins);
+    let mm = MarketMakerIt::start(conf.conf, conf.rpc_password, conf.local).unwrap();
+    let (_dump_log, _dump_dashboard) = mm.mm_dump();
+
+    let electrum = block_on(enable_electrum(&mm, "KMD", false, &[
+        "electrum1.cipig.net:10001",
+        "electrum2.cipig.net:10001",
+        "electrum3.cipig.net:10001",
+    ]));
+    log!("{:?}", electrum);
+
+    let rc = block_on(mm.rpc(&json!({
+        "userpass": mm.userpass,
+        "mmrpc": "2.0",
+        "method": "get_current_mtp",
+        "params": {
+            "coin": "KMD",
+        },
+    })))
+    .unwrap();
+
+    // Test if request is successful before proceeding.
+    assert_eq!(true, rc.0.is_success());
+    let mtp_result: Json = json::from_str(&rc.1).unwrap();
+    // Test if mtp returns a u32 Number.
+    assert_eq!(true, mtp_result["result"]["mtp"].is_number());
+}
+
 #[test]
 #[cfg(not(target_arch = "wasm32"))]
 fn test_get_public_key() {

mm2src/mm2_main/src/rpc/dispatcher/dispatcher.rs

@@ -10,6 +10,7 @@ use crate::{mm2::lp_stats::{add_node_to_version_stat, remove_node_from_version_s
 use coins::hd_wallet::get_new_address;
 use coins::my_tx_history_v2::my_tx_history_v2_rpc;
 use coins::rpc_command::account_balance::account_balance;
+use coins::rpc_command::get_current_mtp::get_current_mtp_rpc;
 use coins::rpc_command::init_create_account::{init_create_new_account, init_create_new_account_status,
                                               init_create_new_account_user_action};
 use coins::rpc_command::init_scan_for_new_addresses::{init_scan_for_new_addresses, init_scan_for_new_addresses_status};
@@ -125,6 +126,7 @@ async fn dispatcher_v2(request: MmRpcRequest, ctx: MmArc) -> DispatcherResult<Re
         "best_orders" => handle_mmrpc(ctx, request, best_orders_rpc_v2).await,
         "enable_bch_with_tokens" => handle_mmrpc(ctx, request, enable_platform_coin_with_tokens::<BchCoin>).await,
         "enable_slp" => handle_mmrpc(ctx, request, enable_token::<SlpToken>).await,
+        "get_current_mtp" => handle_mmrpc(ctx, request, get_current_mtp_rpc).await,
         "get_new_address" => handle_mmrpc(ctx, request, get_new_address).await,
         "get_public_key" => handle_mmrpc(ctx, request, get_public_key).await,
         "get_public_key_hash" => handle_mmrpc(ctx, request, get_public_key_hash).await,