From d1369eb5c6eadeb1baeca52d4c11e80d4343166d Mon Sep 17 00:00:00 2001
From: Martial BE <me@xiao5.info>
Date: Mon, 22 Apr 2024 18:32:20 +0800
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9B=20fix:=20fix=20floating=20point=20?=
 =?UTF-8?q?precision?=
MIME-Version: 1.0
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---
 go.mod         |  1 +
 go.sum         |  2 ++
 model/price.go | 11 +++++++++--
 3 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/go.mod b/go.mod
index 57d6cd1a..acf61592 100644
--- a/go.mod
+++ b/go.mod
@@ -40,6 +40,7 @@ require (
 	github.com/robfig/cron/v3 v3.0.1 // indirect
 	github.com/sagikazarmark/locafero v0.4.0 // indirect
 	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
+	github.com/shopspring/decimal v1.4.0 // indirect
 	github.com/sourcegraph/conc v0.3.0 // indirect
 	github.com/spf13/afero v1.11.0 // indirect
 	github.com/spf13/cast v1.6.0 // indirect
diff --git a/go.sum b/go.sum
index bfa82581..13cc81c1 100644
--- a/go.sum
+++ b/go.sum
@@ -232,6 +232,8 @@ github.com/sagikazarmark/locafero v0.4.0 h1:HApY1R9zGo4DBgr7dqsTH/JJxLTTsOt7u6ke
 github.com/sagikazarmark/locafero v0.4.0/go.mod h1:Pe1W6UlPYUk/+wc/6KFhbORCfqzgYEpgQ3O5fPuL3H4=
 github.com/sagikazarmark/slog-shim v0.1.0 h1:diDBnUNK9N/354PgrxMywXnAwEr1QZcOr6gto+ugjYE=
 github.com/sagikazarmark/slog-shim v0.1.0/go.mod h1:SrcSrq8aKtyuqEI1uvTDTK1arOWRIczQRv+GVI1AkeQ=
+github.com/shopspring/decimal v1.4.0 h1:bxl37RwXBklmTi0C79JfXCEBD1cqqHt0bbgBAGFp81k=
+github.com/shopspring/decimal v1.4.0/go.mod h1:gawqmDU56v4yIKSwfBSFip1HdCCXN8/+DMd9qYNcwME=
 github.com/sourcegraph/conc v0.3.0 h1:OQTbbt6P72L20UqAkXXuLOj79LfEanQ+YQFNpLA9ySo=
 github.com/sourcegraph/conc v0.3.0/go.mod h1:Sdozi7LEKbFPqYX2/J+iBAM6HpqSLTASQIKqDmF7Mt0=
 github.com/spf13/afero v1.11.0 h1:WJQKhtpdm3v2IzqG8VMqrr6Rf3UYpEF239Jy9wNepM8=
diff --git a/model/price.go b/model/price.go
index f0cf1582..923005f4 100644
--- a/model/price.go
+++ b/model/price.go
@@ -3,6 +3,7 @@ package model
 import (
 	"one-api/common"
 
+	"github.com/shopspring/decimal"
 	"gorm.io/gorm"
 )
 
@@ -62,11 +63,17 @@ func (price *Price) GetOutput() float64 {
 }
 
 func (price *Price) FetchInputCurrencyPrice(rate float64) float64 {
-	return price.GetInput() * rate
+	r := decimal.NewFromFloat(price.GetInput()).Mul(decimal.NewFromFloat(rate))
+	v, _ := r.Float64()
+
+	return v
 }
 
 func (price *Price) FetchOutputCurrencyPrice(rate float64) float64 {
-	return price.GetOutput() * rate
+	r := decimal.NewFromFloat(price.GetOutput()).Mul(decimal.NewFromFloat(rate))
+	v, _ := r.Float64()
+
+	return v
 }
 
 func UpdatePrices(tx *gorm.DB, models []string, prices *Price) error {