From 71dd075222b5880722fcdb922fee3150cd5f383e Mon Sep 17 00:00:00 2001
From: Dusan Sekulic <sekula87@gmail.com>
Date: Wed, 29 Sep 2021 18:32:04 +0200
Subject: [PATCH] Issuance: remove multiplication of amount/token with
 precision (#176)

* added factory method FromPublicKeys for creating multiscript payment

* remove multiplication of issuance amount/token with precision
---
 transaction/data/issuance.json |  4 ++--
 transaction/issuance.go        | 13 ++++---------
 2 files changed, 6 insertions(+), 11 deletions(-)

diff --git a/transaction/data/issuance.json b/transaction/data/issuance.json
index ff39f4b..4ec4d8c 100644
--- a/transaction/data/issuance.json
+++ b/transaction/data/issuance.json
@@ -7,8 +7,8 @@
       "index": 68,
       "tokenFlag": 0,
       "precision": 4,
-      "expectedAssetAmount": 10000000,
-      "expectedTokenAmount": 10000,
+      "expectedAssetAmount": 1000,
+      "expectedTokenAmount": 1,
       "expectedEntropy": "3db9d8b4a9da087b42f29f34431412aaa24d63750bb31b9a2e263797248135e0",
       "expectedAsset": "dedf795f74e8b52c6ff8a9ad390850a87b18aeb2be9d1967038308290093a893",
       "expectedToken": "fa1074db60b598cf1d6d0318655125c26a2afc9fe57fb2bdff8d8f7408f8814d"
diff --git a/transaction/issuance.go b/transaction/issuance.go
index c97470e..b35a723 100644
--- a/transaction/issuance.go
+++ b/transaction/issuance.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"encoding/json"
 	"errors"
-	"math"
 
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/vulpemventures/fastsha256"
@@ -117,14 +116,12 @@ func NewTxIssuance(
 
 	confAssetAmount, err := toConfidentialAssetAmount(
 		assetAmount,
-		precision,
 	)
 	if err != nil {
 		return nil, err
 	}
 	confTokenAmount, err := toConfidentialTokenAmount(
 		tokenAmount,
-		precision,
 	)
 	if err != nil {
 		return nil, err
@@ -202,22 +199,20 @@ func (issuance *TxIssuanceExtended) GenerateReissuanceToken(flag uint) ([]byte,
 	return token[:], nil
 }
 
-func toConfidentialAssetAmount(assetAmount uint64, precision uint) ([]byte, error) {
-	amount := assetAmount * uint64(math.Pow10(int(precision)))
-	confAmount, err := elementsutil.SatoshiToElementsValue(amount)
+func toConfidentialAssetAmount(assetAmount uint64) ([]byte, error) {
+	confAmount, err := elementsutil.SatoshiToElementsValue(assetAmount)
 	if err != nil {
 		return nil, err
 	}
 	return confAmount[:], nil
 }
 
-func toConfidentialTokenAmount(tokenAmount uint64, precision uint) ([]byte, error) {
+func toConfidentialTokenAmount(tokenAmount uint64) ([]byte, error) {
 	if tokenAmount == 0 {
 		return []byte{0x00}, nil
 	}
 
-	amount := tokenAmount * uint64(math.Pow10(int(precision)))
-	confAmount, err := elementsutil.SatoshiToElementsValue(amount)
+	confAmount, err := elementsutil.SatoshiToElementsValue(tokenAmount)
 	if err != nil {
 		return nil, err
 	}