style: credit contract style

__crypto/simple_contract/src/credit.rs

@@ -25,10 +25,6 @@ impl CreditContract {
         Ok(c)
     }
 
-    pub fn load(name: &str) -> XResult<Self> {
-        load_credit_contract(name)
-    }
-
     pub fn issue(&mut self, tx: &Transaction, receiver: &str, credit: u32) -> XResult<()> {
         if &self.admin != &tx.sender {
             return simple_error!("Current user is not admin, {} vs {:?}", self.admin, tx.sender);
@@ -82,7 +78,9 @@ impl CreditContract {
     }
 }
 
-fn load_credit_contract(name: &str) -> XResult<CreditContract> {
+
+// ========================================================================= //
+pub fn load_credit_contract(name: &str) -> XResult<CreditContract> {
     let json = fs::read_to_string(name)?;
     serde_json::from_str(&json).map_err(|e| e.into())
 }

__crypto/simple_contract/src/engine_plugin_credit.rs

@@ -1,6 +1,6 @@
 use serde::{Serialize, Deserialize};
 use rust_util::XResult;
-use crate::credit::CreditContract;
+use crate::credit::{CreditContract, load_credit_contract};
 use crate::tx::{Transaction, TransactionBody};
 
 #[derive(Debug, Serialize, Deserialize)]
@@ -53,22 +53,22 @@ impl ContractEngineCredit {
             },
             "issue" => {
                 let params: CreditContractIssueParameters = serde_json::from_str(&tx_body.parameters)?;
-                let mut c = CreditContract::load(&params.name)?;
+                let mut c = load_credit_contract(&params.name)?;
                 c.issue(tx, &params.receiver, params.credit)?;
             },
             "transfer" => {
                 let params: CreditContractTransferParameters = serde_json::from_str(&tx_body.parameters)?;
-                let mut c = CreditContract::load(&params.name)?;
+                let mut c =load_credit_contract(&params.name)?;
                 c.transfer(tx, &params.receiver, params.credit)?;
             },
             "query" => {
                 let params: CreditContractQueryParameters = serde_json::from_str(&tx_body.parameters)?;
-                let c = CreditContract::load(&params.name)?;
+                let c = load_credit_contract(&params.name)?;
                 information!("Query: {}, credit: {}", &params.account, c.query(tx, &params.account));
             },
             "query_all" => {
                 let params: CreditContractQueryAllParameters = serde_json::from_str(&tx_body.parameters)?;
-                let c = CreditContract::load(&params.name)?;
+                let c = load_credit_contract(&params.name)?;
                 let map = c.query_all(tx);
                 map.iter().for_each(|(k , v)| {
                     information!("Query: {}, credit: {}", k, v);