diff --git a/package.json b/package.json
index 9306da6c55..e6e29f43d7 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,8 @@
     "docker:build:geth": "yarn workspace arb-bridge-eth docker:build:geth",
     "docker:parity": "yarn workspace arb-bridge-eth docker:parity",
     "docker:ganache": "yarn workspace arb-bridge-eth docker:ganache",
-    "docker:geth": "yarn workspace arb-bridge-eth docker:geth"
+    "docker:geth": "yarn workspace arb-bridge-eth docker:geth",
+    "prepare": "yarn workspace arb-provider-ethers prepare"
   },
   "engines": {
     "node": ">= 8.0.0 < 13.0.0",
diff --git a/packages/arb-avm-cpp/CMakeLists.txt b/packages/arb-avm-cpp/CMakeLists.txt
index 33a0505a2c..e6226638e0 100644
--- a/packages/arb-avm-cpp/CMakeLists.txt
+++ b/packages/arb-avm-cpp/CMakeLists.txt
@@ -20,7 +20,7 @@ project (arb-avm-cpp)
 
 set(AVM_VERSION_MAJOR 0)
 set(AVM_VERSION_MINOR 6)
-set(AVM_VERSION_PATCH 0)
+set(AVM_VERSION_PATCH 4)
 
 set(AVM_VERSION_STRING ${AVM_VERSION_MAJOR}.${AVM_VERSION_MINOR}.${AVM_VERSION_PATCH})
 
diff --git a/packages/arb-avm-cpp/go.mod b/packages/arb-avm-cpp/go.mod
index 49ae6cdfeb..a1f7d9a6f3 100644
--- a/packages/arb-avm-cpp/go.mod
+++ b/packages/arb-avm-cpp/go.mod
@@ -2,6 +2,6 @@ module github.com/offchainlabs/arbitrum/packages/arb-avm-cpp
 
 go 1.12
 
-require github.com/offchainlabs/arbitrum/packages/arb-util v0.6.0
+require github.com/offchainlabs/arbitrum/packages/arb-util v0.6.4
 
 replace github.com/offchainlabs/arbitrum/packages/arb-util => ../arb-util
diff --git a/packages/arb-avm-go/go.mod b/packages/arb-avm-go/go.mod
index d8c4dfd89d..b2c34edd31 100644
--- a/packages/arb-avm-go/go.mod
+++ b/packages/arb-avm-go/go.mod
@@ -5,7 +5,7 @@ go 1.12
 require (
 	github.com/dgraph-io/badger v1.6.1
 	github.com/ethereum/go-ethereum v1.9.13
-	github.com/offchainlabs/arbitrum/packages/arb-util v0.6.0
+	github.com/offchainlabs/arbitrum/packages/arb-util v0.6.4
 )
 
 replace github.com/offchainlabs/arbitrum/packages/arb-util => ../arb-util
diff --git a/packages/arb-bridge-eth/geth.Dockerfile b/packages/arb-bridge-eth/geth.Dockerfile
index 317e3ae4f0..5487f836cd 100644
--- a/packages/arb-bridge-eth/geth.Dockerfile
+++ b/packages/arb-bridge-eth/geth.Dockerfile
@@ -7,7 +7,7 @@
 
 FROM ethereum/client-go:stable
 
-RUN apk add --no-cache nodejs npm && \
+RUN apk add --no-cache nodejs npm git && \
     addgroup -g 1000 -S user && \
     adduser -u 1000 -S user -G user -s /bin/ash -h /home/user
 USER user
@@ -17,7 +17,7 @@ RUN mkdir -p /home/user/.npm-global && \
     npm config set prefix "/home/user/.npm-global" && \
     npm install -g truffle@5.0.30 yarn@1.17.3
 COPY package.json ./
-RUN yarn --production --frozen-lockfile --non-interactive
+RUN yarn --frozen-lockfile --non-interactive
 COPY contracts ./contracts
 COPY migrations ./migrations
 COPY test ./test
diff --git a/packages/arb-bridge-eth/package.json b/packages/arb-bridge-eth/package.json
index 35a8371ef6..1887ecfd27 100644
--- a/packages/arb-bridge-eth/package.json
+++ b/packages/arb-bridge-eth/package.json
@@ -1,7 +1,7 @@
 {
   "name": "arb-bridge-eth",
   "private": true,
-  "version": "0.6.0",
+  "version": "0.6.4",
   "description": "",
   "author": "Offchain Labs, Inc.",
   "license": "Apache-2.0",
diff --git a/packages/arb-compiler-evm/setup.py b/packages/arb-compiler-evm/setup.py
index b1ca9aaa45..f2be3836ee 100644
--- a/packages/arb-compiler-evm/setup.py
+++ b/packages/arb-compiler-evm/setup.py
@@ -16,7 +16,7 @@
 
 setup(
     name="arb-compiler-evm",
-    version="0.5.0",
+    version="0.6.4",
     description="Compiler from solidity to AVM bytecode",
     url="https://offchainlabs.com",
     author="Offchain Labs, Inc.",
diff --git a/packages/arb-provider-ethers/package.json b/packages/arb-provider-ethers/package.json
index 9bb5b11eab..5d9fd50608 100644
--- a/packages/arb-provider-ethers/package.json
+++ b/packages/arb-provider-ethers/package.json
@@ -1,6 +1,6 @@
 {
   "name": "arb-provider-ethers",
-  "version": "0.6.2",
+  "version": "0.6.4",
   "description": "Arbitrum provider for ethers",
   "author": "Offchain Labs, Inc.",
   "license": "Apache-2.0",
diff --git a/packages/arb-provider-ethers/src/lib/provider.ts b/packages/arb-provider-ethers/src/lib/provider.ts
index e586497418..85f892dcdb 100644
--- a/packages/arb-provider-ethers/src/lib/provider.ts
+++ b/packages/arb-provider-ethers/src/lib/provider.ts
@@ -282,7 +282,7 @@ export class ArbProvider extends ethers.providers.BaseProvider {
     const txHashCheck = evmVal.message.txHash
 
     // Check txHashCheck matches txHash
-    if (txHash !== txHashCheck) {
+    if (arbTxHash !== txHashCheck) {
       throw Error(
         'txHash did not match its queried transaction ' +
           arbTxHash +
diff --git a/packages/arb-provider-go/go.mod b/packages/arb-provider-go/go.mod
index ab81593034..7ed1d7867d 100644
--- a/packages/arb-provider-go/go.mod
+++ b/packages/arb-provider-go/go.mod
@@ -5,8 +5,8 @@ go 1.12
 require (
 	github.com/ethereum/go-ethereum v1.9.13
 	github.com/gorilla/rpc v1.2.0
-	github.com/offchainlabs/arbitrum/packages/arb-util v0.6.0
-	github.com/offchainlabs/arbitrum/packages/arb-validator-core v0.6.0
+	github.com/offchainlabs/arbitrum/packages/arb-util v0.6.4
+	github.com/offchainlabs/arbitrum/packages/arb-validator-core v0.6.4
 )
 
 replace github.com/offchainlabs/arbitrum/packages/arb-validator-core => ../arb-validator-core
diff --git a/packages/arb-provider-truffle/package.json b/packages/arb-provider-truffle/package.json
index 081c2e7d98..5813a14877 100644
--- a/packages/arb-provider-truffle/package.json
+++ b/packages/arb-provider-truffle/package.json
@@ -1,6 +1,6 @@
 {
   "name": "arb-provider-truffle",
-  "version": "0.6.0",
+  "version": "0.6.4",
   "description": "Arbitrum provider for truffle",
   "author": "Offchain Labs, Inc.",
   "license": "Apache-2.0",
diff --git a/packages/arb-provider-web3/package.json b/packages/arb-provider-web3/package.json
index 80b0f88a48..0d40ccda10 100644
--- a/packages/arb-provider-web3/package.json
+++ b/packages/arb-provider-web3/package.json
@@ -1,6 +1,6 @@
 {
   "name": "arb-provider-web3",
-  "version": "0.6.3",
+  "version": "0.6.4",
   "description": "Arbitrum provider for web3",
   "author": "Offchain Labs, Inc.",
   "license": "Apache-2.0",
@@ -20,7 +20,7 @@
   },
   "homepage": "https://offchainlabs.com",
   "dependencies": {
-    "arb-provider-ethers": "0.6.2",
+    "arb-provider-ethers": "0.6.4",
     "ethers": "^4.0.44",
     "ethers-providers": "^2.1.19",
     "ethers-utils": "^2.1.11"
diff --git a/packages/arb-tx-aggregator/go.mod b/packages/arb-tx-aggregator/go.mod
index 505fd185ef..742d3beb64 100644
--- a/packages/arb-tx-aggregator/go.mod
+++ b/packages/arb-tx-aggregator/go.mod
@@ -7,8 +7,8 @@ require (
 	github.com/golang/protobuf v1.4.2
 	github.com/gorilla/rpc v1.2.0
 	github.com/kr/pretty v0.2.0 // indirect
-	github.com/offchainlabs/arbitrum/packages/arb-util v0.6.0
-	github.com/offchainlabs/arbitrum/packages/arb-validator-core v0.6.0
+	github.com/offchainlabs/arbitrum/packages/arb-util v0.6.4
+	github.com/offchainlabs/arbitrum/packages/arb-validator-core v0.6.4
 	github.com/pkg/errors v0.9.1
 	google.golang.org/protobuf v1.24.0
 	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
diff --git a/packages/arb-validator-core/go.mod b/packages/arb-validator-core/go.mod
index 49dad0b94c..528aa458fa 100644
--- a/packages/arb-validator-core/go.mod
+++ b/packages/arb-validator-core/go.mod
@@ -7,8 +7,9 @@ require (
 	github.com/golang/protobuf v1.4.2
 	github.com/gorilla/handlers v1.4.2
 	github.com/gorilla/mux v1.7.4
-	github.com/offchainlabs/arbitrum/packages/arb-util v0.6.0
+	github.com/offchainlabs/arbitrum/packages/arb-util v0.6.4
 	github.com/pkg/errors v0.9.1
+	github.com/status-im/keycard-go v0.0.0-20190316090335-8537d3370df4
 	golang.org/x/crypto v0.0.0-20200311171314-f7b00557c8c4
 	google.golang.org/protobuf v1.24.0
 )
diff --git a/packages/arb-validator-core/message/transactionBatch.go b/packages/arb-validator-core/message/transactionBatch.go
index 60b13f0128..c85e6d4077 100644
--- a/packages/arb-validator-core/message/transactionBatch.go
+++ b/packages/arb-validator-core/message/transactionBatch.go
@@ -21,6 +21,7 @@ import (
 	"encoding/binary"
 	"errors"
 	"fmt"
+	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/offchainlabs/arbitrum/packages/arb-util/value"
 	"log"
 	"math/big"
@@ -64,10 +65,18 @@ type BatchTx struct {
 	Sig    [65]byte
 }
 
+func (b BatchTx) Equals(o BatchTx) bool {
+	return b.To == o.To &&
+		b.SeqNum.Cmp(o.SeqNum) == 0 &&
+		b.Value.Cmp(o.Value) == 0 &&
+		bytes.Equal(b.Data, o.Data) &&
+		b.Sig == o.Sig
+}
+
 func NewBatchTxFromData(data []byte, offset int) (BatchTx, error) {
 	dataLength := int(binary.BigEndian.Uint16(data[offset : offset+2]))
-	if offset+DataOffset+dataLength < len(data) {
-		return BatchTx{}, errors.New("not enough data remaining")
+	if offset+DataOffset+dataLength > len(data) {
+		return BatchTx{}, fmt.Errorf("not enough data remaining (offset: %v, DataOffset: %v, dataLength: %v, totalLength: %v)", offset, DataOffset, dataLength, len(data))
 	}
 	offset += 2
 	toRaw := data[offset : offset+20]
@@ -121,26 +130,34 @@ func (b BatchTx) ToBytes() []byte {
 
 var DataOffset = 151
 
-func (m TransactionBatch) getTransactions() []Transaction {
-	txes := make([]Transaction, 0)
+func (m TransactionBatch) getBatchTransactions() []BatchTx {
+	txes := make([]BatchTx, 0)
 	offset := 0
-
 	data := m.TxData
 	for offset+DataOffset < len(data) {
 		batch, err := NewBatchTxFromData(data, offset)
 		if err != nil {
+			log.Println("Transaction batch", hexutil.Encode(data), "at offset", offset, "included invalid tx", err)
 			break
 		}
+		txes = append(txes, batch)
+		offset += batch.encodedLength()
+	}
+	return txes
+}
 
+func (m TransactionBatch) getTransactions() []Transaction {
+	txes := make([]Transaction, 0)
+	for _, tx := range m.getBatchTransactions() {
 		batchTxHash := BatchTxHash(
 			m.Chain,
-			batch.To,
-			batch.SeqNum,
-			batch.Value,
-			batch.Data,
+			tx.To,
+			tx.SeqNum,
+			tx.Value,
+			tx.Data,
 		)
 		messageHash := hashing.SoliditySHA3WithPrefix(batchTxHash[:])
-		pubkey, err := crypto.SigToPub(messageHash.Bytes(), batch.Sig[:])
+		pubkey, err := crypto.SigToPub(messageHash.Bytes(), tx.Sig[:])
 		if err != nil {
 			// TODO: Is this possible? If so we need to handle it
 			// What are the possible failure conditions and how do they relate
@@ -149,17 +166,15 @@ func (m TransactionBatch) getTransactions() []Transaction {
 		}
 
 		from := common.NewAddressFromEth(crypto.PubkeyToAddress(*pubkey))
-		tx := Transaction{
+		fullTx := Transaction{
 			Chain:       m.Chain,
-			To:          batch.To,
+			To:          tx.To,
 			From:        from,
-			SequenceNum: batch.SeqNum,
-			Value:       batch.Value,
-			Data:        batch.Data,
+			SequenceNum: tx.SeqNum,
+			Value:       tx.Value,
+			Data:        tx.Data,
 		}
-
-		txes = append(txes, tx)
-		offset += batch.encodedLength()
+		txes = append(txes, fullTx)
 	}
 	return txes
 }
diff --git a/packages/arb-validator-core/message/transactionBatch_test.go b/packages/arb-validator-core/message/transactionBatch_test.go
index 4dbb6c68be..5aeca2ac66 100644
--- a/packages/arb-validator-core/message/transactionBatch_test.go
+++ b/packages/arb-validator-core/message/transactionBatch_test.go
@@ -23,7 +23,7 @@ import (
 	"github.com/offchainlabs/arbitrum/packages/arb-util/common"
 )
 
-func generateTestBatch() TransactionBatch {
+func generateBatchTx() BatchTx {
 	addr1 := common.Address{}
 	addr1[0] = 76
 	addr1[19] = 93
@@ -32,7 +32,7 @@ func generateTestBatch() TransactionBatch {
 	addr2[0] = 43
 	addr2[19] = 12
 
-	tx := BatchTx{
+	return BatchTx{
 		To:     addr2,
 		SeqNum: big.NewInt(2),
 		Value:  big.NewInt(43423),
@@ -40,12 +40,33 @@ func generateTestBatch() TransactionBatch {
 		Sig:    [65]byte{87, 42, 56, 98},
 	}
 
+}
+
+func generateTestBatch() TransactionBatch {
+	addr1 := common.Address{}
+	addr1[0] = 76
+	addr1[19] = 93
+
+	tx := generateBatchTx()
 	return TransactionBatch{
 		Chain:  addr1,
 		TxData: tx.ToBytes(),
 	}
 }
 
+func TestMarshalBatch(t *testing.T) {
+	tx := generateBatchTx()
+	data := tx.ToBytes()
+	tx2, err := NewBatchTxFromData(data, 0)
+	if err != nil {
+		t.Error(err)
+	}
+
+	if !tx.Equals(tx2) {
+		t.Error("unmarshaled tx not equal")
+	}
+}
+
 func TestCheckpointBatch(t *testing.T) {
 	msg := generateTestBatch()
 
@@ -58,3 +79,29 @@ func TestCheckpointBatch(t *testing.T) {
 		t.Error("Unmarshalling didn't reverse marshalling", msg, msg2)
 	}
 }
+
+func TestGetTransactions(t *testing.T) {
+	addr1 := common.Address{}
+	addr1[0] = 76
+	addr1[19] = 93
+
+	tx1 := generateBatchTx()
+	tx2 := generateBatchTx()
+	batch := TransactionBatch{
+		Chain:  addr1,
+		TxData: append(tx1.ToBytes(), tx2.ToBytes()...),
+	}
+
+	txes := batch.getBatchTransactions()
+	if len(txes) != 2 {
+		t.Fatal("didn't get back 2 txes")
+	}
+
+	if !txes[0].Equals(tx1) {
+		t.Error("unmarshaled tx not equal")
+	}
+
+	if !txes[1].Equals(tx2) {
+		t.Error("unmarshaled tx not equal")
+	}
+}
diff --git a/packages/arb-validator.Dockerfile b/packages/arb-validator.Dockerfile
index 98368afe9f..f82fa2e08a 100644
--- a/packages/arb-validator.Dockerfile
+++ b/packages/arb-validator.Dockerfile
@@ -53,7 +53,7 @@ COPY --chown=user arb-validator-core/go.* /home/user/arb-validator-core/
 RUN go mod download
 # Copy source code
 COPY --from=arb-avm-cpp /home/user/go.mod /home/user/go.sum /home/user/arb-avm-cpp/
-COPY --from=arb-avm-cpp /home/user/cavm/cmachine.h /home/user/cavm/ccheckpointstorage.h /home/user/arb-avm-cpp/cavm/
+COPY --from=arb-avm-cpp /home/user/cavm/*.h /home/user/arb-avm-cpp/cavm/
 COPY --from=arb-avm-cpp /home/user/cmachine /home/user/arb-avm-cpp/cmachine/
 COPY --chown=user arb-avm-go/ /home/user/arb-avm-go/
 COPY --chown=user arb-util/ /home/user/arb-util/
diff --git a/packages/arb-validator/go.mod b/packages/arb-validator/go.mod
index 44d85ce232..8a7ce8d91c 100644
--- a/packages/arb-validator/go.mod
+++ b/packages/arb-validator/go.mod
@@ -7,10 +7,10 @@ require (
 	github.com/golang/protobuf v1.4.2
 	github.com/gorilla/rpc v1.2.0
 	github.com/hashicorp/golang-lru v0.0.0-20160813221303-0a025b7e63ad
-	github.com/offchainlabs/arbitrum/packages/arb-avm-cpp v0.6.0
-	github.com/offchainlabs/arbitrum/packages/arb-avm-go v0.6.0
-	github.com/offchainlabs/arbitrum/packages/arb-util v0.6.0
-	github.com/offchainlabs/arbitrum/packages/arb-validator-core v0.6.0
+	github.com/offchainlabs/arbitrum/packages/arb-avm-cpp v0.6.4
+	github.com/offchainlabs/arbitrum/packages/arb-avm-go v0.6.4
+	github.com/offchainlabs/arbitrum/packages/arb-util v0.6.4
+	github.com/offchainlabs/arbitrum/packages/arb-validator-core v0.6.4
 	github.com/pkg/errors v0.9.1
 	google.golang.org/protobuf v1.24.0
 )
diff --git a/tests/fibgo/go.mod b/tests/fibgo/go.mod
index f8e8832860..79c1e432f2 100644
--- a/tests/fibgo/go.mod
+++ b/tests/fibgo/go.mod
@@ -5,10 +5,10 @@ go 1.13
 require (
 	github.com/ethereum/go-ethereum v1.9.13
 	github.com/gorilla/rpc v1.2.0
-	github.com/offchainlabs/arbitrum/packages/arb-provider-go v0.6.0
-	github.com/offchainlabs/arbitrum/packages/arb-util v0.6.0
-	github.com/offchainlabs/arbitrum/packages/arb-validator v0.6.0
-	github.com/offchainlabs/arbitrum/packages/arb-validator-core v0.6.0
+	github.com/offchainlabs/arbitrum/packages/arb-provider-go v0.6.4
+	github.com/offchainlabs/arbitrum/packages/arb-util v0.6.4
+	github.com/offchainlabs/arbitrum/packages/arb-validator v0.6.4
+	github.com/offchainlabs/arbitrum/packages/arb-validator-core v0.6.4
 )
 
 replace github.com/offchainlabs/arbitrum/packages/arb-provider-go => ../../packages/arb-provider-go