diff --git a/CHANGELOG.md b/CHANGELOG.md
index a3ed44ccb7..6573e7e7bc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -46,6 +46,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
   recompute eth tx hashes in JSON-RPC APIs to fix old blocks.
 * (deps) [#1168](https://github.com/evmos/ethermint/pull/1168) Upgrade cosmos-sdk to v0.46.
 * (feemarket) [#1194](https://github.com/evmos/ethermint/pull/1194) Apply feemarket to native cosmos tx.
+* (eth) [#1305](https://github.com/evmos/ethermint/pull/1305) Added support for optional params, basic types arrays and `time` type on eip712.
 
 ### API Breaking
 
diff --git a/ethereum/eip712/eip712.go b/ethereum/eip712/eip712.go
index f8895f04a3..8f27a721e1 100644
--- a/ethereum/eip712/eip712.go
+++ b/ethereum/eip712/eip712.go
@@ -7,6 +7,7 @@ import (
 	"math/big"
 	"reflect"
 	"strings"
+	"time"
 
 	sdkmath "cosmossdk.io/math"
 	"golang.org/x/text/cases"
@@ -232,6 +233,11 @@ func traverseFields(
 			// then continue as normal
 		}
 
+		// If its a nil pointer, do not include in types
+		if fieldType.Kind() == reflect.Ptr && field.IsNil() {
+			continue
+		}
+
 		for {
 			if fieldType.Kind() == reflect.Ptr {
 				fieldType = fieldType.Elem()
@@ -296,6 +302,11 @@ func traverseFields(
 
 		ethTyp := typToEth(fieldType)
 		if len(ethTyp) > 0 {
+			// Support array of uint64
+			if isCollection && fieldType.Kind() != reflect.Slice && fieldType.Kind() != reflect.Array {
+				ethTyp += "[]"
+			}
+
 			if prefix == typeDefPrefix {
 				typeMap[rootType] = append(typeMap[rootType], apitypes.Type{
 					Name: fieldName,
@@ -381,6 +392,7 @@ var (
 	bigIntType    = reflect.TypeOf(big.Int{})
 	cosmIntType   = reflect.TypeOf(sdkmath.Int{})
 	cosmosAnyType = reflect.TypeOf(&codectypes.Any{})
+	timeType      = reflect.TypeOf(time.Time{})
 )
 
 // typToEth supports only basic types and arrays of basic types.
@@ -425,6 +437,7 @@ func typToEth(typ reflect.Type) string {
 		}
 	case reflect.Ptr:
 		if typ.Elem().ConvertibleTo(bigIntType) ||
+			typ.Elem().ConvertibleTo(timeType) ||
 			typ.Elem().ConvertibleTo(cosmIntType) {
 			return str
 		}
@@ -432,6 +445,7 @@ func typToEth(typ reflect.Type) string {
 		if typ.ConvertibleTo(hashType) ||
 			typ.ConvertibleTo(addressType) ||
 			typ.ConvertibleTo(bigIntType) ||
+			typ.ConvertibleTo(timeType) ||
 			typ.ConvertibleTo(cosmIntType) {
 			return str
 		}