From ccc0b1c1feb3c3cfeed517712a8d7dd575812314 Mon Sep 17 00:00:00 2001
From: Rohit Narurkar <rohit.narurkar@protonmail.com>
Date: Mon, 28 Jun 2021 15:31:54 +0400
Subject: [PATCH] fix(filecoin): catch and return error on undefined address

---
 chain/filecoin/address.go      |  8 ++++++++
 chain/filecoin/address_test.go | 14 ++++++++++++++
 go.sum                         |  1 +
 3 files changed, 23 insertions(+)

diff --git a/chain/filecoin/address.go b/chain/filecoin/address.go
index cb34c5a6..a20c8459 100644
--- a/chain/filecoin/address.go
+++ b/chain/filecoin/address.go
@@ -1,6 +1,8 @@
 package filecoin
 
 import (
+	"fmt"
+
 	filaddress "github.com/filecoin-project/go-address"
 	"github.com/renproject/multichain/api/address"
 )
@@ -32,6 +34,9 @@ func (encoder AddressEncoder) EncodeAddress(raw address.RawAddress) (address.Add
 	if err != nil {
 		return address.Address(""), err
 	}
+	if addr == filaddress.Undef {
+		return address.Address(""), fmt.Errorf("encoding address: undefined address=%v", raw)
+	}
 	return address.Address(addr.String()), nil
 }
 
@@ -42,5 +47,8 @@ func (addrDecoder AddressDecoder) DecodeAddress(addr address.Address) (address.R
 	if err != nil {
 		return nil, err
 	}
+	if rawAddr == filaddress.Undef {
+		return nil, fmt.Errorf("decoding address: undefined address=%v", addr)
+	}
 	return address.RawAddress(rawAddr.Bytes()), nil
 }
diff --git a/chain/filecoin/address_test.go b/chain/filecoin/address_test.go
index 670419ef..33c1b2b3 100644
--- a/chain/filecoin/address_test.go
+++ b/chain/filecoin/address_test.go
@@ -94,4 +94,18 @@ var _ = Describe("Address", func() {
 			})
 		})
 	})
+
+	Context("when encoding empty address", func() {
+		It("should fail", func() {
+			_, err := encoderDecoder.EncodeAddress(address.RawAddress(pack.Bytes([]byte{})))
+			Expect(err).To(HaveOccurred())
+		})
+	})
+
+	Context("when decoding empty address", func() {
+		It("should fail", func() {
+			_, err := encoderDecoder.DecodeAddress(address.Address(""))
+			Expect(err).To(HaveOccurred())
+		})
+	})
 })
diff --git a/go.sum b/go.sum
index f49524f0..58a5995a 100644
--- a/go.sum
+++ b/go.sum
@@ -30,6 +30,7 @@ dmitri.shuralyov.com/html/belt v0.0.0-20180602232347-f7d459c86be0/go.mod h1:JLBr
 dmitri.shuralyov.com/service/change v0.0.0-20181023043359-a85b471d5412/go.mod h1:a1inKt/atXimZ4Mv927x+r7UpyzRUf4emIoiiSC2TN4=
 dmitri.shuralyov.com/state v0.0.0-20180228185332-28bcc343414c/go.mod h1:0PRwlb0D6DFvNNtx+9ybjezNCa8XF0xaYcETyp6rHWU=
 git.apache.org/thrift.git v0.0.0-20180902110319-2566ecd5d999/go.mod h1:fPE2ZNJGynbRyZ4dJvy6G277gSllfV2HJqblrnkyeyg=
+github.com/99designs/go-keychain v0.0.0-20191008050251-8e49817e8af4 h1:/vQbFIOMbk2FiG/kXiLl8BRyzTWDw7gX/Hz7Dd5eDMs=
 github.com/99designs/go-keychain v0.0.0-20191008050251-8e49817e8af4/go.mod h1:hN7oaIRCjzsZ2dE+yG5k+rsdt3qcwykqK6HVGcKwsw4=
 github.com/99designs/keyring v1.1.3 h1:mEV3iyZWjkxQ7R8ia8GcG97vCX5zQQ7n4o8R2BylwQY=
 github.com/99designs/keyring v1.1.3/go.mod h1:657DQuMrBZRtuL/voxVyiyb6zpMehlm5vLB9Qwrv904=