diff --git a/internal/api/lib_test.go b/internal/api/lib_test.go
index 6b11e3faa..c99d6484e 100644
--- a/internal/api/lib_test.go
+++ b/internal/api/lib_test.go
@@ -580,7 +580,7 @@ func TestInstantiate(t *testing.T) {
 	res, cost, err := Instantiate(cache, checksum, env, info, msg, &igasMeter, store, api, &querier, TESTING_GAS_LIMIT, TESTING_PRINT_DEBUG)
 	require.NoError(t, err)
 	requireOkResponse(t, res, 0)
-	require.Equal(t, uint64(0xd35950), cost.UsedInternally)
+	require.Equal(t, uint64(0xdf0237), cost.UsedInternally)
 
 	var result types.ContractResult
 	err = json.Unmarshal(res, &result)
@@ -611,7 +611,7 @@ func TestExecute(t *testing.T) {
 	diff := time.Since(start)
 	require.NoError(t, err)
 	requireOkResponse(t, res, 0)
-	require.Equal(t, uint64(0xd35950), cost.UsedInternally)
+	require.Equal(t, uint64(0xdf0237), cost.UsedInternally)
 	t.Logf("Time (%d gas): %s\n", cost.UsedInternally, diff)
 
 	// execute with the same store
@@ -624,7 +624,7 @@ func TestExecute(t *testing.T) {
 	res, cost, err = Execute(cache, checksum, env, info, []byte(`{"release":{}}`), &igasMeter2, store, api, &querier, TESTING_GAS_LIMIT, TESTING_PRINT_DEBUG)
 	diff = time.Since(start)
 	require.NoError(t, err)
-	require.Equal(t, uint64(0x16057d3), cost.UsedInternally)
+	require.Equal(t, uint64(0x16d0d5c), cost.UsedInternally)
 	t.Logf("Time (%d gas): %s\n", cost.UsedInternally, diff)
 
 	// make sure it read the balance properly and we got 250 atoms
@@ -678,7 +678,7 @@ func TestExecutePanic(t *testing.T) {
 	store.SetGasMeter(gasMeter2)
 	info = MockInfoBin(t, "fred")
 	_, _, err = Execute(cache, checksum, env, info, []byte(`{"panic":{}}`), &igasMeter2, store, api, &querier, maxGas, TESTING_PRINT_DEBUG)
-	require.ErrorContains(t, err, "RuntimeError: Aborted: panicked at 'This page intentionally faulted'")
+	require.ErrorContains(t, err, "This page intentionally faulted")
 }
 
 func TestExecuteUnreachable(t *testing.T) {
@@ -731,7 +731,7 @@ func TestExecuteCpuLoop(t *testing.T) {
 	diff := time.Since(start)
 	require.NoError(t, err)
 	requireOkResponse(t, res, 0)
-	require.Equal(t, uint64(0x895c33), cost.UsedInternally)
+	require.Equal(t, uint64(0x8bbb63), cost.UsedInternally)
 	t.Logf("Time (%d gas): %s\n", cost.UsedInternally, diff)
 
 	// execute a cpu loop
@@ -973,7 +973,7 @@ func TestMultipleInstances(t *testing.T) {
 	require.NoError(t, err)
 	requireOkResponse(t, res, 0)
 	// we now count wasm gas charges and db writes
-	assert.Equal(t, uint64(0xd2189c), cost.UsedInternally)
+	assert.Equal(t, uint64(0xddc183), cost.UsedInternally)
 
 	// instance2 controlled by mary
 	gasMeter2 := NewMockGasMeter(TESTING_GAS_LIMIT)
@@ -984,14 +984,14 @@ func TestMultipleInstances(t *testing.T) {
 	res, cost, err = Instantiate(cache, checksum, env, info, msg, &igasMeter2, store2, api, &querier, TESTING_GAS_LIMIT, TESTING_PRINT_DEBUG)
 	require.NoError(t, err)
 	requireOkResponse(t, res, 0)
-	assert.Equal(t, uint64(0xd2ce86), cost.UsedInternally)
+	assert.Equal(t, uint64(0xde776d), cost.UsedInternally)
 
 	// fail to execute store1 with mary
-	resp := exec(t, cache, checksum, "mary", store1, api, querier, 0xbe8534)
+	resp := exec(t, cache, checksum, "mary", store1, api, querier, 0xcbb812)
 	require.Equal(t, "Unauthorized", resp.Err)
 
 	// succeed to execute store1 with fred
-	resp = exec(t, cache, checksum, "fred", store1, api, querier, 0x15fce67)
+	resp = exec(t, cache, checksum, "fred", store1, api, querier, 0x16c83f0)
 	require.Empty(t, resp.Err)
 	require.Len(t, resp.Ok.Messages, 1)
 	attributes := resp.Ok.Attributes
@@ -1000,7 +1000,7 @@ func TestMultipleInstances(t *testing.T) {
 	require.Equal(t, "bob", attributes[1].Value)
 
 	// succeed to execute store2 with mary
-	resp = exec(t, cache, checksum, "mary", store2, api, querier, 0x160131d)
+	resp = exec(t, cache, checksum, "mary", store2, api, querier, 0x16cc8a6)
 	require.Empty(t, resp.Err)
 	require.Len(t, resp.Ok.Messages, 1)
 	attributes = resp.Ok.Attributes
diff --git a/internal/api/mocks.go b/internal/api/mocks.go
index 225904224..d268d9e80 100644
--- a/internal/api/mocks.go
+++ b/internal/api/mocks.go
@@ -1,6 +1,7 @@
 package api
 
 import (
+	"encoding/hex"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -20,6 +21,7 @@ import (
 const MOCK_CONTRACT_ADDR = "contract"
 
 func MockEnv() types.Env {
+	tx_hash, _ := hex.DecodeString("AABBCCDDEEFF0011AABBCCDDEEFF0011AABBCCDDEEFF0011AABBCCDDEEFF0011")
 	return types.Env{
 		Block: types.BlockInfo{
 			Height:  123,
@@ -28,6 +30,7 @@ func MockEnv() types.Env {
 		},
 		Transaction: &types.TransactionInfo{
 			Index: 4,
+			Hash:  tx_hash,
 		},
 		Contract: types.ContractInfo{
 			Address: MOCK_CONTRACT_ADDR,
diff --git a/lib_libwasmvm_test.go b/lib_libwasmvm_test.go
index a4661bbc4..a799ab7c9 100644
--- a/lib_libwasmvm_test.go
+++ b/lib_libwasmvm_test.go
@@ -3,6 +3,7 @@
 package cosmwasm
 
 import (
+	"encoding/hex"
 	"encoding/json"
 	"fmt"
 	"math"
@@ -253,6 +254,8 @@ func TestEnv(t *testing.T) {
 	expected, _ := json.Marshal(env)
 	require.Equal(t, expected, ires.Data)
 
+	tx_hash, _ := hex.DecodeString("AABBCCDDEEFF0011AABBCCDDEEFF0011AABBCCDDEEFF0011AABBCCDDEEFF0011")
+
 	// Execute mirror env with Transaction
 	env = types.Env{
 		Block: types.BlockInfo{
@@ -265,6 +268,7 @@ func TestEnv(t *testing.T) {
 		},
 		Transaction: &types.TransactionInfo{
 			Index: 18,
+			Hash:  tx_hash,
 		},
 	}
 	info = api.MockInfo("creator", nil)
diff --git a/testdata/cyberpunk.wasm b/testdata/cyberpunk.wasm
index ea4d73e85..45bdc894f 100644
Binary files a/testdata/cyberpunk.wasm and b/testdata/cyberpunk.wasm differ
diff --git a/types/env.go b/types/env.go
index 37a19ea38..d853918ac 100644
--- a/types/env.go
+++ b/types/env.go
@@ -33,6 +33,9 @@ type TransactionInfo struct {
 	// Along with BlockInfo.Height, this allows you to get a unique
 	// transaction identifier for the chain for future queries
 	Index uint32 `json:"index"`
+
+	// Hash of the transaction.
+	Hash []byte `json:"hash,omitempty"`
 }
 
 type MessageInfo struct {