diff --git a/core/interface.go b/core/interface.go
index 98ca600..85411b8 100644
--- a/core/interface.go
+++ b/core/interface.go
@@ -121,6 +121,7 @@ type StateDB interface {
 
 type RWStateDB interface {
 	StateDB
+	AddBalance(add Address, amount *big.Int)
 }
 
 type ScopeContext interface {
diff --git a/go.mod b/go.mod
index 268a8fd..290b7a7 100644
--- a/go.mod
+++ b/go.mod
@@ -8,6 +8,7 @@ require (
 	github.com/google/gofuzz v1.1.1-0.20200604201612-c04b05f3adfa
 	github.com/holiman/uint256 v1.2.0
 	github.com/jedisct1/go-minisign v0.0.0-20190909160543-45766022959e
+	github.com/kylelemons/godebug v1.1.0
 	github.com/stretchr/testify v1.7.2
 	golang.org/x/crypto v0.1.0
 	golang.org/x/sys v0.5.0
@@ -16,7 +17,6 @@ require (
 require (
 	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 // indirect
 	github.com/kr/pretty v0.1.0 // indirect
-	github.com/kylelemons/godebug v1.1.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
diff --git a/go.sum b/go.sum
index 3125676..2ab9cbc 100644
--- a/go.sum
+++ b/go.sum
@@ -1,8 +1,10 @@
 github.com/btcsuite/btcd/btcec/v2 v2.2.0 h1:fzn1qaOt32TuLjFlkzYSsBC35Q3KUjT1SwPxiMSCF5k=
 github.com/btcsuite/btcd/btcec/v2 v2.2.0/go.mod h1:U7MHm051Al6XmscBQ0BoNydpOTsFAn707034b5nY8zU=
+github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1 h1:q0rUy8C/TYNBQS1+CGKw68tLOFYSNEs0TFnxxnS9+4U=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/decred/dcrd/crypto/blake256 v1.0.0 h1:/8DMNYp9SGi5f0w7uCm6d6M4OU2rGFK09Y2A4Xv7EE0=
 github.com/decred/dcrd/crypto/blake256 v1.0.0/go.mod h1:sQl2p6Y26YV+ZOcSTP6thNdn47hh8kt6rqSlvmrXFAc=
 github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 h1:YLtO71vCjJRCBcrPMtQ9nqBsqpA1m5sE92cU+pd5Mcc=
 github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1/go.mod h1:hyedUtir6IdtD/7lIxGeCxkaw7y45JueMRL4DIyJDKs=