diff --git a/packages/core/src/builder/transactionBuilder.spec.ts b/packages/core/src/builder/transactionBuilder.spec.ts
index 2b1890b8..7f9bad85 100644
--- a/packages/core/src/builder/transactionBuilder.spec.ts
+++ b/packages/core/src/builder/transactionBuilder.spec.ts
@@ -372,10 +372,6 @@ describe("Building", () => {
             tokenId: "aef39c526e0c5d9b94e4b93f03b661c8e232382a32c71e1e74b14fc45e09fbed",
             amount: "4"
           })
-          // .addTokens({
-          //   tokenId: "aef39c526e0c5d9b94e4b93f03b661c8e232382a32c71e1e74b14fc45e09fbed",
-          //   amount: "2"
-          // })
           .setAdditionalRegisters({
             R4: "08cd038d39af8c37583609ff51c6a577efe60684119da2fbd0d75f9c72372886a58a63",
             R5: "05c0a38601",
diff --git a/packages/core/src/serializer/sigma/boxSerializer.spec.ts b/packages/core/src/serializer/sigma/boxSerializer.spec.ts
index 6cda3101..2acf5e37 100644
--- a/packages/core/src/serializer/sigma/boxSerializer.spec.ts
+++ b/packages/core/src/serializer/sigma/boxSerializer.spec.ts
@@ -1,3 +1,4 @@
+import { Box } from "@fleet-sdk/common";
 import { bytesToHex } from "@noble/hashes/utils";
 import { serializeBox } from "./boxSerializer";
 
@@ -22,7 +23,7 @@ describe("Serialize ErgoBox", () => {
         ],
         confirmed: true
       },
-      bytes:
+      serialized:
         "c0843d0008cd038d39af8c37583609ff51c6a577efe60684119da2fbd0d75f9c72372886a58a63cdee330150fdc80e168c153e472bd7e3dd18a4a0b9e90c550206fdbdb789ee8afdd3b1a90100ae11d207f0989945f63909d2f703b2640acf4f654a8fdadd23570a640f9d12ee00"
     },
     {
@@ -135,7 +136,7 @@ describe("Serialize ErgoBox", () => {
           }
         ]
       },
-      bytes:
+      serialized:
         "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"
     },
     {
@@ -156,7 +157,7 @@ describe("Serialize ErgoBox", () => {
           }
         ]
       },
-      bytes:
+      serialized:
         "c0843d0008cd02200a1c1b8fa17ec82de54bcaef96f23d7b34196c0410f6f578abdbf163b14b258abd33010cd8c9f416e5b1ca9f986a7f10a84191dfb85941619e49e53c0dc30ebf83324b0100b66aab1e43874ad8c5583f685a7d6d947238c373f615aee1d04ee604ba2c934000"
     },
     {
@@ -177,7 +178,7 @@ describe("Serialize ErgoBox", () => {
           }
         ]
       },
-      bytes:
+      serialized:
         "d68bb4440008cd038d39af8c37583609ff51c6a577efe60684119da2fbd0d75f9c72372886a58a6380ea30011fd6e032e8476c4aa54c18c1a308dce83940e8f4a28f576440513ed7326ad489fcf715008d210ec0a43662a397b1a35cf3091b246927eba1a51bae6696c8a640491eecd602"
     },
     {
@@ -193,7 +194,7 @@ describe("Serialize ErgoBox", () => {
         additionalRegisters: {},
         assets: []
       },
-      bytes:
+      serialized:
         "c0843d0008cd0357ab5c00616362607d7d9e7000f35f4451a35dd99228b36a38f1461e4308e48480ea3000008d210ec0a43662a397b1a35cf3091b246927eba1a51bae6696c8a640491eecd600"
     },
     {
@@ -219,14 +220,37 @@ describe("Serialize ErgoBox", () => {
           R6: "0e20f7ef73c4a4ab91b84bb0a2905108d534114472ec057be3a57a9dfc9b1fbd85c1"
         }
       },
-      bytes:
+      serialized:
         "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"
     }
   ];
 
   it("Should serialize", () => {
     for (const tv of testVectors) {
-      expect(bytesToHex(serializeBox(tv.json))).toBe(tv.bytes);
+      expect(bytesToHex(serializeBox(tv.json))).toBe(tv.serialized);
     }
   });
+
+  it("Should fail with BoxCandidate without distinct tokens list", () => {
+    expect(() => {
+      serializeBox({
+        boxId: "8f281813a88e3016d0e0e7b83c5917931f63b610e4dc9af84ad1adecae50778d",
+        value: 14996250000n,
+        creationHeight: 852571,
+        ergoTree:
+          "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",
+        assets: [
+          {
+            tokenId: "011d3364de07e5a26f0c4eef0852cddb387039a921b7154ef3cab22c6eda887f",
+            amount: 1n
+          }
+        ],
+        additionalRegisters: {
+          R4: "05cab4cd9a03",
+          R5: "04bc8968",
+          R6: "0e20f7ef73c4a4ab91b84bb0a2905108d534114472ec057be3a57a9dfc9b1fbd85c1"
+        }
+      } as unknown as Box<string>);
+    }).toThrow();
+  });
 });
diff --git a/packages/core/src/serializer/sigma/boxSerializer.ts b/packages/core/src/serializer/sigma/boxSerializer.ts
index dfbc4cec..c6ec51cb 100644
--- a/packages/core/src/serializer/sigma/boxSerializer.ts
+++ b/packages/core/src/serializer/sigma/boxSerializer.ts
@@ -1,30 +1,68 @@
-import { Amount, Box, NonMandatoryRegisters, TokenAmount } from "@fleet-sdk/common";
+import {
+  Amount,
+  Box,
+  BoxCandidate,
+  NonMandatoryRegisters,
+  some,
+  TokenAmount
+} from "@fleet-sdk/common";
 import { ensureBigInt, isDefined, isEmpty } from "@fleet-sdk/common";
 import { concatBytes, hexToBytes } from "@noble/hashes/utils";
 import { ErgoBox } from "../../models/ergoBox";
 import { vlqEncode, vqlEncodeBigInt } from "../vlq";
 
-export function serializeBox(box: Box<Amount> | ErgoBox): Uint8Array {
-  return concatBytes(
+export function serializeBox(box: Box<Amount> | ErgoBox): Uint8Array;
+export function serializeBox(box: BoxCandidate<Amount>, distinctTokenIds: string[]): Uint8Array;
+export function serializeBox(
+  box: Box<Amount> | ErgoBox | BoxCandidate<Amount>,
+  distinctTokenIds?: string[]
+): Uint8Array {
+  const bytes = concatBytes(
     vqlEncodeBigInt(ensureBigInt(box.value)),
     hexToBytes(box.ergoTree),
     vlqEncode(box.creationHeight),
-    serializeTokens(box.assets),
-    serializeRegisters(box.additionalRegisters),
-    hexToBytes(box.transactionId),
-    vlqEncode(box.index)
+    serializeTokens(box.assets, distinctTokenIds),
+    serializeRegisters(box.additionalRegisters)
   );
+
+  if (isDefined(distinctTokenIds)) {
+    return bytes;
+  } else {
+    if (!isBox(box)) {
+      throw new Error("Invalid box type.");
+    }
+
+    return concatBytes(bytes, hexToBytes(box.transactionId), vlqEncode(box.index));
+  }
 }
 
-function serializeTokens(tokens: TokenAmount<Amount>[]): Uint8Array {
+function isBox<T extends Amount>(box: Box<Amount> | ErgoBox | BoxCandidate<Amount>): box is Box<T> {
+  const castedBox = box as Box<T>;
+
+  return isDefined(castedBox.transactionId) && isDefined(castedBox.index);
+}
+
+function serializeTokens(tokens: TokenAmount<Amount>[], tokenIds?: string[]): Uint8Array {
   if (isEmpty(tokens)) {
     return Uint8Array.from([0]);
   }
 
+  if (some(tokenIds)) {
+    return concatBytes(
+      vlqEncode(tokens.length),
+      ...tokens.map((token) =>
+        concatBytes(
+          vlqEncode(tokenIds.indexOf(token.tokenId)),
+          vqlEncodeBigInt(ensureBigInt(token.amount))
+        )
+      )
+    );
+  }
+
   return concatBytes(
     vlqEncode(tokens.length),
-    ...tokens.map((asset) =>
-      concatBytes(hexToBytes(asset.tokenId), vqlEncodeBigInt(ensureBigInt(asset.amount)))
+    ...tokens.map((token) =>
+      concatBytes(hexToBytes(token.tokenId), vqlEncodeBigInt(ensureBigInt(token.amount)))
     )
   );
 }
diff --git a/packages/core/src/serializer/sigma/transactionSerializer.spec.ts b/packages/core/src/serializer/sigma/transactionSerializer.spec.ts
new file mode 100644
index 00000000..f0710c0b
--- /dev/null
+++ b/packages/core/src/serializer/sigma/transactionSerializer.spec.ts
@@ -0,0 +1,600 @@
+import { blake2b } from "@noble/hashes/blake2b";
+import { bytesToHex } from "@noble/hashes/utils";
+import { serializeTransaction } from "./transactionSerializer";
+
+describe("Transaction serializer", () => {
+  [
+    {
+      name: "With data inputs",
+      txId: "81a5a1cf6aed3391a2c68cd55ae1b1c95f942a130ce2bb5633a889921e94abf4",
+      serialized:
+        "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",
+      json: {
+        inputs: [
+          {
+            boxId: "a276f80c28324e2cf14de46e2d012d3d4c0db78ce05d6b38707f618fb92b5612",
+            extension: {}
+          },
+          {
+            boxId: "9260b0eaec3df776bbb2bc2fb2a1b2c70273de9c08f36fb299f8ddfd10a4a4e8",
+            extension: {}
+          },
+          {
+            boxId: "7bc4018b0afffe274a8f7e51d4dc1c80150c60105fb07233ae73f99ecd48f4e4",
+            extension: {}
+          },
+          {
+            boxId: "b6bb03003029e25d398b0bb3f36433adfe7bf0bdc0ebb3284280ab2b547edb2a",
+            extension: {}
+          }
+        ],
+        dataInputs: [
+          {
+            boxId: "58fd1b60c3564254e3fba785d9d50e845d36d568d61d1505bc6f276d31ce1dcc"
+          }
+        ],
+        outputs: [
+          {
+            value: "1321123756239865",
+            creationHeight: 942037,
+            ergoTree:
+              "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",
+            additionalRegisters: {
+              R4: "05b0fdb039",
+              R5: "05d29cdc830f"
+            },
+            assets: [
+              {
+                tokenId: "03faf2cb329f2e90d6d23b58d91bbb6c046aa143261cc21f52fbe2824bfcbf04",
+                amount: "9999939829929"
+              },
+              {
+                tokenId: "003bd19d0187117f130b62e1bcab0939929ff5c7709f843c5c4dd158949285d0",
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+            extension: {}
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+        ],
+        dataInputs: [],
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+          {
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+              {
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+                amount: "1"
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+              {
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+                amount: "200000000000"
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+                amount: "1984"
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+              {
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+                amount: "20999999000000000"
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+              {
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+              {
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+                amount: "33"
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+              {
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+                amount: "89800000"
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+              {
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+                amount: "579960"
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+              {
+                tokenId: "36aba4b4a97b65be491cf9f5ca57b5408b0da8d0194f30ec8330d1e8946161c1",
+                amount: "3"
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+              {
+                tokenId: "bf2afb01fde7e373e22f24032434a7b883913bd87a23b62ee8b43eba53c9f6c2",
+                amount: "1"
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+              {
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+                amount: "316227765"
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+              {
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+                amount: "1"
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+              {
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+                amount: "1"
+              }
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+    },
+    {
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+      serialized:
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+      json: {
+        inputs: [
+          {
+            boxId: "4eac3e472d075056a714e99041512eaffc909b5ae57676313074e2278b12188c",
+            extension: {}
+          },
+          {
+            boxId: "5bd6b8472d780bae98e04f86deb9a3850b38e3aefc3d673518a78a17f79853f2",
+            extension: {}
+          },
+          {
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+            extension: {}
+          },
+          {
+            boxId: "647d1eed7f147c86eadddd8f4adbb1e2e71e9fb424abc1512339812345a46133",
+            extension: {}
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+          {
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+            extension: {}
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+          {
+            boxId: "79df8579285b4d1de25cda5f4ffae6facad8062b33d822e0a43e130b051c3517",
+            extension: {}
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+          {
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+            extension: {}
+          },
+          {
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+            extension: {}
+          },
+          {
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+            extension: {}
+          },
+          {
+            boxId: "a5e012c1d09ee37101701d77414b7acb24d6f5b94ac452e56166dce506e5c738",
+            extension: {}
+          }
+        ],
+        dataInputs: [],
+        outputs: [
+          {
+            boxId: "11beed33735ab766b7c12833eb22110fefee2e9d3c35cc63b63f99c3750b1a1f",
+            value: "6801414185",
+            creationHeight: 943396,
+            ergoTree: "0008cd027304abbaebe8bb3a9e963dfa9fa4964d7d001e6a1bd225eadc84048ae49b627c",
+            additionalRegisters: {},
+            assets: []
+          },
+          {
+            boxId: "5d1eb171d8e90b6afe04e3ce9dfec09abf0ca9d73f6e8613ff479a18b41e40fe",
+            value: "10000000",
+            creationHeight: 943396,
+            ergoTree:
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+            additionalRegisters: {},
+            assets: []
+          }
+        ]
+      }
+    },
+    {
+      name: "With many tokens",
+      txId: "d81fd5aef51efd112cfa16bf3b828def1c9eaa5239fbd6ecd66b622a37094037",
+      serialized:
+        "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",
+      json: {
+        inputs: [
+          {
+            boxId: "98ad09294af65c9867f6e7ab841d447477871e8d04d1def6d53efb4cc46a10b6",
+            extension: {}
+          },
+          {
+            boxId: "5a85077756cb03f691333dccacc894b759acc89a21c93fe099727dcc58b31abc",
+            extension: {}
+          },
+          {
+            boxId: "0c1fb353d7ddcd58b3bd252a523331bbf8e3dc05b23e11f6b2041c07ee194a4b",
+            extension: {}
+          }
+        ],
+        dataInputs: [],
+        outputs: [
+          {
+            boxId: "8db7c48ca1198058313e8bbe8aaef8222c3895b3503ea7ccb1bf46d29f109895",
+            value: "2000000000",
+            creationHeight: 936250,
+            ergoTree:
+              "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",
+            additionalRegisters: {
+              R4: "08cd02f31eb1d87a89b28cee6a4a458380c4651965bfe9096ef5c31e4452400a846189",
+              R5: "0580a8d6b907",
+              R6: "05c0c2e2b907",
+              R7: "04c016"
+            },
+            assets: []
+          },
+          {
+            boxId: "6392e2e0e7bae3cb42c5b70188a8f99560f8caa3dcb4d9c663557b2a1b3e4d94",
+            value: "2200000",
+            creationHeight: 936250,
+            ergoTree:
+              "1005040004000e36100204a00b08cd0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ea02d192a39a8cc7a701730073011001020402d19683030193a38cc7b2a57300000193c2b2a57301007473027303830108cdeeac93b1a57304",
+            additionalRegisters: {},
+            assets: []
+          },
+          {
+            boxId: "90f94439d57d47a762cecb9daca1c30acc39ddc497c151a3462f701df9bea27e",
+            value: "967798476",
+            creationHeight: 936250,
+            ergoTree: "0008cd02f31eb1d87a89b28cee6a4a458380c4651965bfe9096ef5c31e4452400a846189",
+            additionalRegisters: {},
+            assets: [
+              {
+                tokenId: "d71693c49a84fbbecd4908c94813b46514b18b67a99952dc1e6e4791556de413",
+                amount: "1680"
+              },
+              {
+                tokenId: "03faf2cb329f2e90d6d23b58d91bbb6c046aa143261cc21f52fbe2824bfcbf04",
+                amount: "97"
+              },
+              {
+                tokenId: "ee77ee100560655bd5ef0639890c1968850b74065033c450ae414b699a2bb92c",
+                amount: "1"
+              },
+              {
+                tokenId: "e8b20745ee9d18817305f32eb21015831a48f02d40980de6e849f886dca7f807",
+                amount: "89800000"
+              },
+              {
+                tokenId: "0cd8c9f416e5b1ca9f986a7f10a84191dfb85941619e49e53c0dc30ebf83324b",
+                amount: "18473"
+              },
+              {
+                tokenId: "30974274078845f263b4f21787e33cc99e9ec19a17ad85a5bc6da2cca91c5a2e",
+                amount: "271138953312"
+              },
+              {
+                tokenId: "ef802b475c06189fdbf844153cdc1d449a5ba87cce13d11bb47b5a539f27f12b",
+                amount: "393636133487"
+              },
+              {
+                tokenId: "18c938e1924fc3eadc266e75ec02d81fe73b56e4e9f4e268dffffcb30387c42d",
+                amount: "67905"
+              },
+              {
+                tokenId: "abaf9df62c6810b0198333b122d130c29d76d64c6d7f4d57108afc5aaa95efb5",
+                amount: "3506"
+              },
+              {
+                tokenId: "00b1e236b60b95c2c6f8007a9d89bc460fc9e78f98b09faec9449007b40bccf3",
+                amount: "579960"
+              },
+              {
+                tokenId: "00bd762484086cf560d3127eb53f0769d76244d9737636b2699d55c56cd470bf",
+                amount: "17073"
+              },
+              {
+                tokenId: "e91cbc48016eb390f8f872aa2962772863e2e840708517d1ab85e57451f91bed",
+                amount: "1400"
+              },
+              {
+                tokenId: "74251ce2cb4eb2024a1a155e19ad1d1f58ff8b9e6eb034a3bb1fd58802757d23",
+                amount: "200000000000"
+              },
+              {
+                tokenId: "bf2afb01fde7e373e22f24032434a7b883913bd87a23b62ee8b43eba53c9f6c2",
+                amount: "1"
+              },
+              {
+                tokenId: "bf337a2ce726259ad31e043c5b3d432e31b403fc6686691171e0e0a319b9ae7a",
+                amount: "1"
+              },
+              {
+                tokenId: "5a34d53ca483924b9a6aa0c771f11888881b516a8d1a9cdc535d063fe26d065e",
+                amount: "33"
+              },
+              {
+                tokenId: "a3b3fa62124ef52209a46121e3f93ca98d7fc24198009e90fde8205ef9d3fc33",
+                amount: "1"
+              },
+              {
+                tokenId: "02f31739e2e4937bb9afb552943753d1e3e9cdd1a5e5661949cb0cef93f907ea",
+                amount: "206926"
+              },
+              {
+                tokenId: "bf59773def7e08375a553be4cbd862de85f66e6dd3dccb8f87f53158f9255bf5",
+                amount: "1234567890123455789"
+              },
+              {
+                tokenId: "59ee24951ce668f0ed32bdb2e2e5731b6c36128748a3b23c28407c5f8ccbf0f6",
+                amount: "2"
+              },
+              {
+                tokenId: "ee105e8290b090a773b7c56756507d45a76743d73bce54e8a915e95d9eb97360",
+                amount: "316227765"
+              },
+              {
+                tokenId: "fbbaac7337d051c10fc3da0ccb864f4d32d40027551e1c3ea3ce361f39b91e40",
+                amount: "984"
+              },
+              {
+                tokenId: "50fdc80e168c153e472bd7e3dd18a4a0b9e90c550206fdbdb789ee8afdd3b1a9",
+                amount: "1"
+              },
+              {
+                tokenId: "d601123e8838b95cdaebe24e594276b2a89cd38e98add98405bb5327520ecf6c",
+                amount: "15913500"
+              },
+              {
+                tokenId: "beefc19f4224eec14d5cfb984b31bd691a4b20d1a7909e0e53fe4c9ea9b1b002",
+                amount: "20999999000000000"
+              },
+              {
+                tokenId: "1c51c3a53abfe87e6db9a03c649e8360f255ffc4bd34303d30fc7db23ae551db",
+                amount: "539"
+              },
+              {
+                tokenId: "36aba4b4a97b65be491cf9f5ca57b5408b0da8d0194f30ec8330d1e8946161c1",
+                amount: "3"
+              }
+            ]
+          }
+        ]
+      }
+    },
+    {
+      name: "With one token",
+      txId: "28b75adc97f947e7a404de58b8211905f9c3924fa1e481dbe397f51b712a7879",
+      serialized:
+        "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",
+      json: {
+        inputs: [
+          {
+            boxId: "ce2d7c76f8d28aacc7ca0fa4d320725564f8b57c8dc6e3bbde7c7c0c397bde6f",
+            extension: {}
+          },
+          {
+            boxId: "88e7f34d851659189697e1aa6be84aed8b0c9e4f8b8a627517fde8cc04b14811",
+            extension: {}
+          }
+        ],
+        dataInputs: [],
+        outputs: [
+          {
+            value: "1000000",
+            ergoTree: "0008cd038d39af8c37583609ff51c6a577efe60684119da2fbd0d75f9c72372886a58a63",
+            assets: [
+              {
+                tokenId: "9a06d9e545a41fd51eeffc5e20d818073bf820c635e2a9d922269913e0de369d",
+                amount: "617227"
+              }
+            ],
+            additionalRegisters: {},
+            creationHeight: 942700
+          },
+          {
+            value: "1100000",
+            ergoTree:
+              "1005040004000e36100204a00b08cd0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ea02d192a39a8cc7a701730073011001020402d19683030193a38cc7b2a57300000193c2b2a57301007473027303830108cdeeac93b1a57304",
+            assets: [],
+            additionalRegisters: {},
+            creationHeight: 942700
+          },
+          {
+            value: "9200000",
+            ergoTree: "0008cd038d39af8c37583609ff51c6a577efe60684119da2fbd0d75f9c72372886a58a63",
+            assets: [],
+            additionalRegisters: {},
+            creationHeight: 942700
+          }
+        ]
+      }
+    }
+  ].map((tv) => {
+    it(`Should serialize [${tv.name}]`, () => {
+      const bytes = serializeTransaction(tv.json);
+
+      expect(bytesToHex(bytes)).toBe(tv.serialized);
+      expect(bytesToHex(blake2b(bytes, { dkLen: 32 }))).toBe(tv.txId);
+    });
+  });
+});
diff --git a/packages/core/src/serializer/sigma/transactionSerializer.ts b/packages/core/src/serializer/sigma/transactionSerializer.ts
new file mode 100644
index 00000000..f0753a4f
--- /dev/null
+++ b/packages/core/src/serializer/sigma/transactionSerializer.ts
@@ -0,0 +1,67 @@
+import {
+  Amount,
+  BoxCandidate,
+  ContextExtension,
+  isDefined,
+  isEmpty,
+  UnsignedInput,
+  UnsignedTransaction
+} from "@fleet-sdk/common";
+import { concatBytes, hexToBytes } from "@noble/hashes/utils";
+import { vlqEncode } from "../vlq";
+import { serializeBox } from "./boxSerializer";
+
+export function serializeTransaction(transaction: UnsignedTransaction) {
+  const tokenIds = getDistinctTokenIds(transaction.outputs);
+
+  return concatBytes(
+    vlqEncode(transaction.inputs.length),
+    concatBytes(...transaction.inputs.map((input) => serializeInput(input))),
+
+    vlqEncode(transaction.dataInputs.length),
+    concatBytes(...transaction.dataInputs.map((dataInput) => hexToBytes(dataInput.boxId))),
+
+    vlqEncode(tokenIds.length),
+    concatBytes(...tokenIds.map((tokenId) => hexToBytes(tokenId))),
+
+    vlqEncode(transaction.outputs.length),
+    concatBytes(...transaction.outputs.map((output) => serializeBox(output, tokenIds)))
+  );
+}
+
+function serializeInput(input: UnsignedInput) {
+  return concatBytes(
+    hexToBytes(input.boxId),
+    generateEmptyProofBytes(),
+    serializeExtension(input.extension)
+  );
+}
+
+function generateEmptyProofBytes() {
+  return Uint8Array.from([0]);
+}
+
+function serializeExtension(extension: ContextExtension) {
+  const keys = Object.keys(extension);
+  if (isEmpty(keys)) {
+    return Uint8Array.from([0]);
+  }
+
+  const bytes: Uint8Array[] = [];
+  for (const key of keys) {
+    const val = extension[key as unknown as keyof ContextExtension];
+    if (isDefined(val)) {
+      bytes.push(vlqEncode(Number(key)));
+      bytes.push(hexToBytes(val));
+    }
+  }
+
+  return concatBytes(vlqEncode(keys.length), concatBytes(...bytes));
+}
+
+function getDistinctTokenIds(outputs: BoxCandidate<Amount>[]) {
+  const tokenIds = new Set<string>();
+  outputs.flatMap((output) => output.assets.map((asset) => tokenIds.add(asset.tokenId)));
+
+  return Array.from(tokenIds);
+}