diff --git a/accounts/abi/error_handling.go b/accounts/abi/error_handling.go
index c106e9ac43..0000c181ad 100644
--- a/accounts/abi/error_handling.go
+++ b/accounts/abi/error_handling.go
@@ -26,11 +26,19 @@ var (
 	errBadBool   = errors.New("abi: improperly encoded boolean value")
 	errBadUint8  = errors.New("abi: improperly encoded uint8 value")
 	errBadUint16 = errors.New("abi: improperly encoded uint16 value")
+	errBadUint24 = errors.New("abi: improperly encoded uint24 value")
 	errBadUint32 = errors.New("abi: improperly encoded uint32 value")
+	errBadUint40 = errors.New("abi: improperly encoded uint40 value")
+	errBadUint48 = errors.New("abi: improperly encoded uint48 value")
+	errBadUint56 = errors.New("abi: improperly encoded uint56 value")
 	errBadUint64 = errors.New("abi: improperly encoded uint64 value")
 	errBadInt8   = errors.New("abi: improperly encoded int8 value")
 	errBadInt16  = errors.New("abi: improperly encoded int16 value")
+	errBadInt24  = errors.New("abi: improperly encoded int24 value")
 	errBadInt32  = errors.New("abi: improperly encoded int32 value")
+	errBadInt40  = errors.New("abi: improperly encoded int40 value")
+	errBadInt48  = errors.New("abi: improperly encoded int48 value")
+	errBadInt56  = errors.New("abi: improperly encoded int56 value")
 	errBadInt64  = errors.New("abi: improperly encoded int64 value")
 )
 
diff --git a/accounts/abi/packing_test.go b/accounts/abi/packing_test.go
index eae3b0df20..9912bac036 100644
--- a/accounts/abi/packing_test.go
+++ b/accounts/abi/packing_test.go
@@ -72,6 +72,19 @@ var packUnpackTests = []packUnpackTest{
 		packed:   "0000000000000000000000000000000000000000000000000000000000000001",
 		unpacked: big.NewInt(1),
 	},
+	{
+		def:      `[{"type": "uint24"}]`,
+		packed:   "0000000000000000000000000000000000000000000000000000000000000001",
+		unpacked: uint32(1),
+	},
+	{
+		def:      `[{"type": "uint24[]"}]`,
+		unpacked: []uint32{1, 2},
+		packed: "0000000000000000000000000000000000000000000000000000000000000020" +
+			"0000000000000000000000000000000000000000000000000000000000000002" +
+			"0000000000000000000000000000000000000000000000000000000000000001" +
+			"0000000000000000000000000000000000000000000000000000000000000002",
+	},
 	{
 		def:      `[{"type": "uint32"}]`,
 		packed:   "0000000000000000000000000000000000000000000000000000000000000001",
@@ -85,6 +98,45 @@ var packUnpackTests = []packUnpackTest{
 			"0000000000000000000000000000000000000000000000000000000000000001" +
 			"0000000000000000000000000000000000000000000000000000000000000002",
 	},
+	{
+		def:      `[{"type": "uint40"}]`,
+		packed:   "0000000000000000000000000000000000000000000000000000000000000001",
+		unpacked: uint64(1),
+	},
+	{
+		def:      `[{"type": "uint40[]"}]`,
+		unpacked: []uint64{1, 2},
+		packed: "0000000000000000000000000000000000000000000000000000000000000020" +
+			"0000000000000000000000000000000000000000000000000000000000000002" +
+			"0000000000000000000000000000000000000000000000000000000000000001" +
+			"0000000000000000000000000000000000000000000000000000000000000002",
+	},
+	{
+		def:      `[{"type": "uint48"}]`,
+		packed:   "0000000000000000000000000000000000000000000000000000000000000001",
+		unpacked: uint64(1),
+	},
+	{
+		def:      `[{"type": "uint48[]"}]`,
+		unpacked: []uint64{1, 2},
+		packed: "0000000000000000000000000000000000000000000000000000000000000020" +
+			"0000000000000000000000000000000000000000000000000000000000000002" +
+			"0000000000000000000000000000000000000000000000000000000000000001" +
+			"0000000000000000000000000000000000000000000000000000000000000002",
+	},
+	{
+		def:      `[{"type": "uint56"}]`,
+		packed:   "0000000000000000000000000000000000000000000000000000000000000001",
+		unpacked: uint64(1),
+	},
+	{
+		def:      `[{"type": "uint56[]"}]`,
+		unpacked: []uint64{1, 2},
+		packed: "0000000000000000000000000000000000000000000000000000000000000020" +
+			"0000000000000000000000000000000000000000000000000000000000000002" +
+			"0000000000000000000000000000000000000000000000000000000000000001" +
+			"0000000000000000000000000000000000000000000000000000000000000002",
+	},
 	{
 		def:      `[{"type": "uint64"}]`,
 		unpacked: uint64(2),
@@ -137,6 +189,19 @@ var packUnpackTests = []packUnpackTest{
 			"0000000000000000000000000000000000000000000000000000000000000001" +
 			"0000000000000000000000000000000000000000000000000000000000000002",
 	},
+	{
+		def:      `[{"type": "int24"}]`,
+		unpacked: int32(2),
+		packed:   "0000000000000000000000000000000000000000000000000000000000000002",
+	},
+	{
+		def:      `[{"type": "int24[]"}]`,
+		unpacked: []int32{1, 2},
+		packed: "0000000000000000000000000000000000000000000000000000000000000020" +
+			"0000000000000000000000000000000000000000000000000000000000000002" +
+			"0000000000000000000000000000000000000000000000000000000000000001" +
+			"0000000000000000000000000000000000000000000000000000000000000002",
+	},
 	{
 		def:      `[{"type": "int17"}]`,
 		packed:   "0000000000000000000000000000000000000000000000000000000000000001",
@@ -160,6 +225,45 @@ var packUnpackTests = []packUnpackTest{
 			"0000000000000000000000000000000000000000000000000000000000000001" +
 			"0000000000000000000000000000000000000000000000000000000000000002",
 	},
+	{
+		def:      `[{"type": "int40"}]`,
+		unpacked: int64(2),
+		packed:   "0000000000000000000000000000000000000000000000000000000000000002",
+	},
+	{
+		def:      `[{"type": "int40[]"}]`,
+		unpacked: []int64{1, 2},
+		packed: "0000000000000000000000000000000000000000000000000000000000000020" +
+			"0000000000000000000000000000000000000000000000000000000000000002" +
+			"0000000000000000000000000000000000000000000000000000000000000001" +
+			"0000000000000000000000000000000000000000000000000000000000000002",
+	},
+	{
+		def:      `[{"type": "int48"}]`,
+		unpacked: int64(2),
+		packed:   "0000000000000000000000000000000000000000000000000000000000000002",
+	},
+	{
+		def:      `[{"type": "int48[]"}]`,
+		unpacked: []int64{1, 2},
+		packed: "0000000000000000000000000000000000000000000000000000000000000020" +
+			"0000000000000000000000000000000000000000000000000000000000000002" +
+			"0000000000000000000000000000000000000000000000000000000000000001" +
+			"0000000000000000000000000000000000000000000000000000000000000002",
+	},
+	{
+		def:      `[{"type": "int56"}]`,
+		unpacked: int64(2),
+		packed:   "0000000000000000000000000000000000000000000000000000000000000002",
+	},
+	{
+		def:      `[{"type": "int56[]"}]`,
+		unpacked: []int64{1, 2},
+		packed: "0000000000000000000000000000000000000000000000000000000000000020" +
+			"0000000000000000000000000000000000000000000000000000000000000002" +
+			"0000000000000000000000000000000000000000000000000000000000000001" +
+			"0000000000000000000000000000000000000000000000000000000000000002",
+	},
 	{
 		def:      `[{"type": "int64"}]`,
 		unpacked: int64(2),
diff --git a/accounts/abi/reflect.go b/accounts/abi/reflect.go
index 729ca93c54..e6487aad6a 100644
--- a/accounts/abi/reflect.go
+++ b/accounts/abi/reflect.go
@@ -68,9 +68,9 @@ func reflectIntType(unsigned bool, size int) reflect.Type {
 			return reflect.TypeOf(uint8(0))
 		case 16:
 			return reflect.TypeOf(uint16(0))
-		case 32:
+		case 24, 32:
 			return reflect.TypeOf(uint32(0))
-		case 64:
+		case 40, 48, 56, 64:
 			return reflect.TypeOf(uint64(0))
 		}
 	}
@@ -79,9 +79,9 @@ func reflectIntType(unsigned bool, size int) reflect.Type {
 		return reflect.TypeOf(int8(0))
 	case 16:
 		return reflect.TypeOf(int16(0))
-	case 32:
+	case 24, 32:
 		return reflect.TypeOf(int32(0))
-	case 64:
+	case 40, 48, 56, 64:
 		return reflect.TypeOf(int64(0))
 	}
 	return reflect.TypeOf(&big.Int{})
diff --git a/accounts/abi/type_test.go b/accounts/abi/type_test.go
index 95922548c4..7cea6f245d 100644
--- a/accounts/abi/type_test.go
+++ b/accounts/abi/type_test.go
@@ -140,12 +140,13 @@ func TestTypeCheck(t *testing.T) {
 		{"uint64", nil, uint64(1), ""},
 		{"int8", nil, int8(1), ""},
 		{"int16", nil, int16(1), ""},
+		{"int24", nil, int32(1), ""},
 		{"int32", nil, int32(1), ""},
 		{"int64", nil, int64(1), ""},
-		{"uint24", nil, big.NewInt(1), ""},
-		{"uint40", nil, big.NewInt(1), ""},
-		{"uint48", nil, big.NewInt(1), ""},
-		{"uint56", nil, big.NewInt(1), ""},
+		{"uint24", nil, uint32(1), ""},
+		{"uint40", nil, uint64(1), ""},
+		{"uint48", nil, uint64(1), ""},
+		{"uint56", nil, uint64(1), ""},
 		{"uint72", nil, big.NewInt(1), ""},
 		{"uint80", nil, big.NewInt(1), ""},
 		{"uint88", nil, big.NewInt(1), ""},
@@ -169,10 +170,10 @@ func TestTypeCheck(t *testing.T) {
 		{"uint232", nil, big.NewInt(1), ""},
 		{"uint240", nil, big.NewInt(1), ""},
 		{"uint248", nil, big.NewInt(1), ""},
-		{"int24", nil, big.NewInt(1), ""},
-		{"int40", nil, big.NewInt(1), ""},
-		{"int48", nil, big.NewInt(1), ""},
-		{"int56", nil, big.NewInt(1), ""},
+		{"int24", nil, int32(1), ""},
+		{"int40", nil, int64(1), ""},
+		{"int48", nil, int64(1), ""},
+		{"int56", nil, int64(1), ""},
 		{"int72", nil, big.NewInt(1), ""},
 		{"int80", nil, big.NewInt(1), ""},
 		{"int88", nil, big.NewInt(1), ""},
@@ -213,6 +214,28 @@ func TestTypeCheck(t *testing.T) {
 		{"uint16[3]", nil, [4]uint16{1, 2, 3}, "abi: cannot use [4]uint16 as type [3]uint16 as argument"},
 		{"uint16[3]", nil, []uint16{1, 2, 3}, ""},
 		{"uint16[3]", nil, []uint16{1, 2, 3, 4}, "abi: cannot use [4]uint16 as type [3]uint16 as argument"},
+		{"uint24[]", nil, []uint32{1, 2, 3}, ""},
+		{"uint24[]", nil, [3]uint32{1, 2, 3}, ""},
+		{"uint24[]", nil, []uint64{1, 2, 3}, "abi: cannot use []uint64 as type [0]uint32 as argument"},
+		{"uint24[3]", nil, [3]uint64{1, 2, 3}, "abi: cannot use [3]uint64 as type [3]uint32 as argument"},
+		{"uint24[3]", nil, [4]uint32{1, 2, 3}, "abi: cannot use [4]uint32 as type [3]uint32 as argument"},
+		{"uint24[3]", nil, []uint32{1, 2, 3}, ""},
+		{"uint24[3]", nil, []uint32{1, 2, 3, 4}, "abi: cannot use [4]uint32 as type [3]uint32 as argument"},
+		{"uint40[]", nil, []uint64{1, 2, 3}, ""},
+		{"uint40[]", nil, [3]uint64{1, 2, 3}, ""},
+		{"uint40[3]", nil, [4]uint64{1, 2, 3}, "abi: cannot use [4]uint64 as type [3]uint64 as argument"},
+		{"uint40[3]", nil, []uint64{1, 2, 3}, ""},
+		{"uint40[3]", nil, []uint64{1, 2, 3, 4}, "abi: cannot use [4]uint64 as type [3]uint64 as argument"},
+		{"uint48[]", nil, []uint64{1, 2, 3}, ""},
+		{"uint48[]", nil, [3]uint64{1, 2, 3}, ""},
+		{"uint48[3]", nil, [4]uint64{1, 2, 3}, "abi: cannot use [4]uint64 as type [3]uint64 as argument"},
+		{"uint48[3]", nil, []uint64{1, 2, 3}, ""},
+		{"uint48[3]", nil, []uint64{1, 2, 3, 4}, "abi: cannot use [4]uint64 as type [3]uint64 as argument"},
+		{"uint56[]", nil, []uint64{1, 2, 3}, ""},
+		{"uint56[]", nil, [3]uint64{1, 2, 3}, ""},
+		{"uint56[3]", nil, [4]uint64{1, 2, 3}, "abi: cannot use [4]uint64 as type [3]uint64 as argument"},
+		{"uint56[3]", nil, []uint64{1, 2, 3}, ""},
+		{"uint56[3]", nil, []uint64{1, 2, 3, 4}, "abi: cannot use [4]uint64 as type [3]uint64 as argument"},
 		{"address[]", nil, []common.Address{{1}}, ""},
 		{"address[1]", nil, []common.Address{{1}}, ""},
 		{"address[1]", nil, [1]common.Address{{1}}, ""},
diff --git a/accounts/abi/unpack.go b/accounts/abi/unpack.go
index 905b5ce629..18b667aaa2 100644
--- a/accounts/abi/unpack.go
+++ b/accounts/abi/unpack.go
@@ -51,11 +51,31 @@ func ReadInteger(typ Type, b []byte) (interface{}, error) {
 				return nil, errBadUint16
 			}
 			return uint16(u64), nil
+		case 24:
+			if !isu64 || u64 > 1<<24-1 {
+				return nil, errBadUint24
+			}
+			return uint32(u64), nil
 		case 32:
 			if !isu64 || u64 > math.MaxUint32 {
 				return nil, errBadUint32
 			}
 			return uint32(u64), nil
+		case 40:
+			if !isu64 || u64 > 1<<40-1 {
+				return nil, errBadUint40
+			}
+			return u64, nil
+		case 48:
+			if !isu64 || u64 > 1<<48-1 {
+				return nil, errBadUint48
+			}
+			return u64, nil
+		case 56:
+			if !isu64 || u64 > 1<<56-1 {
+				return nil, errBadUint56
+			}
+			return u64, nil
 		case 64:
 			if !isu64 {
 				return nil, errBadUint64
@@ -87,19 +107,38 @@ func ReadInteger(typ Type, b []byte) (interface{}, error) {
 			return nil, errBadInt16
 		}
 		return int16(i64), nil
+	case 24:
+		if !isi64 || i64 < -1<<23 || i64 > 1<<23-1 {
+			return nil, errBadInt24
+		}
+		return int32(i64), nil
 	case 32:
 		if !isi64 || i64 < math.MinInt32 || i64 > math.MaxInt32 {
 			return nil, errBadInt32
 		}
 		return int32(i64), nil
+	case 40:
+		if !isi64 || i64 < -1<<39 || i64 > 1<<39-1 {
+			return nil, errBadInt40
+		}
+		return i64, nil
+	case 48:
+		if !isi64 || i64 < -1<<47 || i64 > 1<<47-1 {
+			return nil, errBadInt48
+		}
+		return i64, nil
+	case 56:
+		if !isi64 || i64 < -1<<55 || i64 > 1<<55-1 {
+			return nil, errBadInt56
+		}
+		return i64, nil
 	case 64:
 		if !isi64 {
 			return nil, errBadInt64
 		}
 		return i64, nil
 	default:
-		// the only case left for integer is int256
-
+		// The only remaining case for an integer is a range where int64 > x <= int256
 		return ret, nil
 	}
 }
diff --git a/accounts/abi/unpack_test.go b/accounts/abi/unpack_test.go
index 7df7b9c403..48682b7936 100644
--- a/accounts/abi/unpack_test.go
+++ b/accounts/abi/unpack_test.go
@@ -999,6 +999,17 @@ func TestPackAndUnpackIncompatibleNumber(t *testing.T) {
 			err:         nil,
 			expectValue: uint16(math.MaxUint16),
 		},
+		{
+			decodeType: "uint24",
+			inputValue: big.NewInt(1 << 24),
+			err:        errBadUint24,
+		},
+		{
+			decodeType:  "uint24",
+			inputValue:  big.NewInt(1<<24 - 1),
+			err:         nil,
+			expectValue: uint32(1<<24 - 1),
+		},
 		{
 			decodeType: "uint32",
 			inputValue: big.NewInt(math.MaxUint32 + 1),
@@ -1010,6 +1021,39 @@ func TestPackAndUnpackIncompatibleNumber(t *testing.T) {
 			err:         nil,
 			expectValue: uint32(math.MaxUint32),
 		},
+		{
+			decodeType: "uint40",
+			inputValue: big.NewInt(1 << 40),
+			err:        errBadUint40,
+		},
+		{
+			decodeType:  "uint40",
+			inputValue:  big.NewInt(1<<40 - 1),
+			err:         nil,
+			expectValue: uint64(1<<40 - 1),
+		},
+		{
+			decodeType: "uint48",
+			inputValue: big.NewInt(1 << 48),
+			err:        errBadUint48,
+		},
+		{
+			decodeType:  "uint48",
+			inputValue:  big.NewInt(1<<48 - 1),
+			err:         nil,
+			expectValue: uint64(1<<48 - 1),
+		},
+		{
+			decodeType: "uint56",
+			inputValue: big.NewInt(1 << 56),
+			err:        errBadUint56,
+		},
+		{
+			decodeType:  "uint56",
+			inputValue:  big.NewInt(1<<56 - 1),
+			err:         nil,
+			expectValue: uint64(1<<56 - 1),
+		},
 		{
 			decodeType: "uint64",
 			inputValue: maxU64Plus1,
@@ -1059,6 +1103,28 @@ func TestPackAndUnpackIncompatibleNumber(t *testing.T) {
 			err:         nil,
 			expectValue: int16(math.MaxInt16),
 		},
+		{
+			decodeType: "int24",
+			inputValue: big.NewInt(-1<<23 - 1),
+			err:        errBadInt24,
+		},
+		{
+			decodeType: "int24",
+			inputValue: big.NewInt(1<<23 - 1 + 1),
+			err:        errBadInt24,
+		},
+		{
+			decodeType:  "int24",
+			inputValue:  big.NewInt(-1 << 23),
+			err:         nil,
+			expectValue: int32(-1 << 23),
+		},
+		{
+			decodeType:  "int24",
+			inputValue:  big.NewInt(1<<23 - 1),
+			err:         nil,
+			expectValue: int32(1<<23 - 1),
+		},
 		{
 			decodeType: "int32",
 			inputValue: big.NewInt(math.MaxInt32 + 1),
@@ -1075,6 +1141,72 @@ func TestPackAndUnpackIncompatibleNumber(t *testing.T) {
 			err:         nil,
 			expectValue: int32(math.MaxInt32),
 		},
+		{
+			decodeType: "int40",
+			inputValue: big.NewInt(-1<<39 - 1),
+			err:        errBadInt40,
+		},
+		{
+			decodeType: "int40",
+			inputValue: big.NewInt(1<<39 - 1 + 1),
+			err:        errBadInt40,
+		},
+		{
+			decodeType:  "int40",
+			inputValue:  big.NewInt(-1 << 39),
+			err:         nil,
+			expectValue: int64(-1 << 39),
+		},
+		{
+			decodeType:  "int40",
+			inputValue:  big.NewInt(1<<39 - 1),
+			err:         nil,
+			expectValue: int64(1<<39 - 1),
+		},
+		{
+			decodeType: "int48",
+			inputValue: big.NewInt(-1<<47 - 1),
+			err:        errBadInt48,
+		},
+		{
+			decodeType: "int48",
+			inputValue: big.NewInt(1<<47 - 1 + 1),
+			err:        errBadInt48,
+		},
+		{
+			decodeType:  "int48",
+			inputValue:  big.NewInt(-1 << 47),
+			err:         nil,
+			expectValue: int64(-1 << 47),
+		},
+		{
+			decodeType:  "int48",
+			inputValue:  big.NewInt(1<<47 - 1),
+			err:         nil,
+			expectValue: int64(1<<47 - 1),
+		},
+		{
+			decodeType: "int56",
+			inputValue: big.NewInt(-1<<55 - 1),
+			err:        errBadInt56,
+		},
+		{
+			decodeType: "int56",
+			inputValue: big.NewInt(1<<55 - 1 + 1),
+			err:        errBadInt56,
+		},
+		{
+			decodeType:  "int56",
+			inputValue:  big.NewInt(-1 << 55),
+			err:         nil,
+			expectValue: int64(-1 << 55),
+		},
+		{
+			decodeType:  "int56",
+			inputValue:  big.NewInt(1<<55 - 1),
+			err:         nil,
+			expectValue: int64(1<<55 - 1),
+		},
 		{
 			decodeType: "int64",
 			inputValue: new(big.Int).Add(big.NewInt(math.MaxInt64), big.NewInt(1)),