From dbb892d89f9abc83a438a87487c5ff13d1a3ea50 Mon Sep 17 00:00:00 2001
From: Maciej Witowski <maciej.witowski@protocol.ai>
Date: Fri, 28 Apr 2023 17:01:11 +0200
Subject: [PATCH] lotus-fountain: make compatible with 0x addresses #10560

---
 cmd/lotus-fountain/main.go | 38 ++++++++++++++++++++++++++++++--------
 1 file changed, 30 insertions(+), 8 deletions(-)

diff --git a/cmd/lotus-fountain/main.go b/cmd/lotus-fountain/main.go
index 780aef916..464251cd3 100644
--- a/cmd/lotus-fountain/main.go
+++ b/cmd/lotus-fountain/main.go
@@ -7,6 +7,7 @@ import (
 	"net"
 	"net/http"
 	"os"
+	"strings"
 	"time"
 
 	rice "github.com/GeertJohan/go.rice"
@@ -19,6 +20,7 @@ import (
 	"github.com/filecoin-project/lotus/api/v0api"
 	"github.com/filecoin-project/lotus/build"
 	"github.com/filecoin-project/lotus/chain/types"
+	"github.com/filecoin-project/lotus/chain/types/ethtypes"
 	lcli "github.com/filecoin-project/lotus/cli"
 )
 
@@ -193,14 +195,34 @@ func (h *handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	to, err := address.NewFromString(r.FormValue("address"))
-	if err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
-		return
-	}
-	if to == address.Undef {
-		http.Error(w, "empty address", http.StatusBadRequest)
-		return
+	var to address.Address
+
+	addressInput := r.FormValue("address")
+	if strings.HasPrefix(addressInput, "0x") {
+		ethAddress, err := ethtypes.ParseEthAddress(addressInput)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return
+		}
+
+		filecoinAddress, err := ethAddress.ToFilecoinAddress()
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return
+		}
+		to = filecoinAddress
+	} else {
+		filecoinAddress, err := address.NewFromString(addressInput)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return
+		}
+		if filecoinAddress == address.Undef {
+			http.Error(w, "empty address", http.StatusBadRequest)
+			return
+		}
+
+		to = filecoinAddress
 	}
 
 	// Limit based on wallet address