From 9163385ed810b56483a2c7fa166165324534b43d Mon Sep 17 00:00:00 2001
From: Nate Maninger <me@n8m.us>
Date: Sun, 14 Jan 2024 11:05:57 -0800
Subject: [PATCH] types: add Float64() to currency

---
 types/currency.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/types/currency.go b/types/currency.go
index 34bf039a..7088ebdc 100644
--- a/types/currency.go
+++ b/types/currency.go
@@ -12,6 +12,8 @@ import (
 )
 
 var (
+	scPrecisionBig = new(big.Int).Exp(big.NewInt(10), big.NewInt(-24), nil)
+
 	// ZeroCurrency represents zero base units.
 	ZeroCurrency Currency
 
@@ -276,6 +278,12 @@ func (c Currency) String() string {
 	return s
 }
 
+// Float64 returns the value of c as a float64 and a bool indicating whether f
+// represents x exactly.
+func (c Currency) Float64() (float64, bool) {
+	return new(big.Rat).SetFrac(c.Big(), scPrecisionBig).Float64()
+}
+
 // Format implements fmt.Formatter. It accepts the following formats:
 //
 //	d: raw integer (equivalent to ExactString())