# AVM Transaction Format

This file is meant to be the single source of truth for how we serialize transactions in the Avalanche Virtual Machine (AVM). This document uses the [primitive serialization](untitled-1) format for packing and [secp256k1](../untitled-3#cryptography-in-the-avalanche-virtual-machine) for cryptographic user identification.

## Codec ID

Some data is prepended with a codec ID (unt16) that denotes how the data should be deserialized. Right now, the only valid codec ID is 0 (`0x00 0x00`).

## Transferable Output

Transferable outputs wrap an output with an asset ID.

### What Transferable Output Contains

A transferable output contains an `AssetID` and an [`Output`](#outputs).

* **`AssetID`** is a 32-byte array that defines which asset this output references.
* **`Output`** is an output, as defined [below](#secp-256-k1-transfer-output). For example, this can be a [SECP256K1 transfer output](#secp-256-k1-transfer-output).

### Gantt Transferable Output Specification

```
+----------+----------+-------------------------+
| asset_id : [32]byte |                32 bytes |
+----------+----------+-------------------------+
| output   : Output   |      size(output) bytes |
+----------+----------+-------------------------+
                      | 32 + size(output) bytes |
                      +-------------------------+
```

### Proto Transferable Output Specification

```
message TransferableOutput {
    bytes asset_id = 1; // 32 bytes
    Output output = 2;  // size(output)
}
```

### Transferable Output Example

Let’s make a transferable output:

* `AssetID`: `0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f`
* `Output`: `"Example SECP256K1 Transfer Output from below"`

```
[
    AssetID <- 0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f
    Output  <- 0x000000070000000000003039000000000000d431000000010000000251025c61fbcfc078f69334f834be6dd26d55a955c3344128e060128ede3523a24a461c8943ab0859,
]
=
[
    // assetID:
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
    // output:
    0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x30, 0x39, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0xd4, 0x31, 0x00, 0x00, 0x00, 0x01,
    0x00, 0x00, 0x00, 0x02, 0x51, 0x02, 0x5c, 0x61,
    0xfb, 0xcf, 0xc0, 0x78, 0xf6, 0x93, 0x34, 0xf8,
    0x34, 0xbe, 0x6d, 0xd2, 0x6d, 0x55, 0xa9, 0x55,
    0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
    0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
    0x43, 0xab, 0x08, 0x59,
]
```

## Transferable Input

Transferable inputs describe a specific UTXO with a provided transfer input.

### What Transferable Input Contains

A transferable input contains a `TxID`, `UTXOIndex` `AssetID` and an `Input`.

* **`TxID`** is a 32-byte array that defines which transaction this input is consuming an output from.
* **`UTXOIndex`** is an int that defines which utxo this input is consuming in the specified transaction.
* **`AssetID`** is a 32-byte array that defines which asset this input references.
* **`Input`** is an input, as defined below. This can currently only be a [SECP256K1 transfer input](#secp-256-k1-transfer-input)

### Gantt Transferable Input Specification

```
+------------+----------+------------------------+
| tx_id      : [32]byte |               32 bytes |
+------------+----------+------------------------+
| utxo_index : int      |               04 bytes |
+------------+----------+------------------------+
| asset_id   : [32]byte |               32 bytes |
+------------+----------+------------------------+
| input      : Input    |      size(input) bytes |
+------------+----------+------------------------+
                        | 68 + size(input) bytes |
                        +------------------------+
```

### Proto Transferable Input Specification

```
message TransferableInput {
    bytes tx_id = 1;       // 32 bytes
    uint32 utxo_index = 2; // 04 bytes
    bytes asset_id = 3;    // 32 bytes
    Input input = 4;       // size(input)
}
```

### Transferable Input Example

Let’s make a transferable input:

* `TxID`: `0xf1e1d1c1b1a191817161514131211101f0e0d0c0b0a090807060504030201000`
* `UTXOIndex`: `5`
* `AssetID`: `0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f`
* `Input`: `"Example SECP256K1 Transfer Input from below"`

```
[
    TxID      <- 0xf1e1d1c1b1a191817161514131211101f0e0d0c0b0a090807060504030201000
    UTXOIndex <- 0x00000005
    AssetID   <- 0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f
    Input     <- 0x0000000500000000075bcd15000000020000000700000003
]
=
[
    // txID:
    0xf1, 0xe1, 0xd1, 0xc1, 0xb1, 0xa1, 0x91, 0x81,
    0x71, 0x61, 0x51, 0x41, 0x31, 0x21, 0x11, 0x01,
    0xf0, 0xe0, 0xd0, 0xc0, 0xb0, 0xa0, 0x90, 0x80,
    0x70, 0x60, 0x50, 0x40, 0x30, 0x20, 0x10, 0x00,
    // utxoIndex:
    0x00, 0x00, 0x00, 0x05,
    // assetID:
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
    // input:
    0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00,
    0x07, 0x5b, 0xcd, 0x15, 0x00, 0x00, 0x00, 0x02,
    0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x07
]
```

## Transferable Op

Transferable operations describe a set of UTXOs with a provided transfer operation. Only one Asset ID is able to be referenced per operation.

### What Transferable Op Contains

A transferable operation contains an `AssetID`, `UTXOIDs`, and `TransferOp`.

* **`AssetID`** is a 32-byte array that defines which asset this operation changes.
* **`UTXOIDs`** is an array of TxID-OutputIndex tuples. This array must be sorted in lexicographical order.
* **`TransferOp`** is a [transferable operation object](#operations).

### Gantt Transferable Op Specification

```
+-------------+------------+------------------------------+
| asset_id    : [32]byte   |                     32 bytes |
+-------------+------------+------------------------------+
| utxo_ids    : []UTXOID   | 4 + 36 * len(utxo_ids) bytes |
+-------------+------------+------------------------------+
| transfer_op : TransferOp |      size(transfer_op) bytes |
+-------------+------------+------------------------------+
                           |   36 + 36 * len(utxo_ids)    |
                           |    + size(transfer_op) bytes |
                           +------------------------------+
```

### Proto Transferable Op Specification

```
message UTXOID {
    bytes tx_id = 1;       // 32 bytes
    uint32 utxo_index = 2; // 04 bytes
}
message TransferableOp {
    bytes asset_id = 1;           // 32 bytes
    repeated UTXOID utxo_ids = 2; // 4 + 36 * len(utxo_ids) bytes
    TransferOp transfer_op = 3;   // size(transfer_op)
}
```

### Transferable Op Example

Let’s make a transferable operation:

* `AssetID`: `0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f`
* `UTXOIDs`:
  * `UTXOID`:
    * `TxID`: `0xf1e1d1c1b1a191817161514131211101f0e0d0c0b0a090807060504030201000`
    * `UTXOIndex`: `5`
* `Op`: `"Example Transfer Op from below"`

```
[
    AssetID   <- 0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f
    UTXOIDs   <- [
        {
            TxID:0xf1e1d1c1b1a191817161514131211101f0e0d0c0b0a090807060504030201000
            UTXOIndex:5
        }
    ]
    Op     <- 0x0000000d0000000200000003000000070000303900000003431100000000010000000251025c61fbcfc078f69334f834be6dd26d55a955c3344128e060128ede3523a24a461c8943ab0859
]
=
[
    // assetID:
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
    // number of utxoIDs:
    0x00, 0x00, 0x00, 0x01,
    // txID:
    0xf1, 0xe1, 0xd1, 0xc1, 0xb1, 0xa1, 0x91, 0x81,
    0x71, 0x61, 0x51, 0x41, 0x31, 0x21, 0x11, 0x01,
    0xf0, 0xe0, 0xd0, 0xc0, 0xb0, 0xa0, 0x90, 0x80,
    0x70, 0x60, 0x50, 0x40, 0x30, 0x20, 0x10, 0x00,
    // utxoIndex:
    0x00, 0x00, 0x00, 0x05,
    // op:
    0x00, 0x00, 0x00, 0x0d, 0x00, 0x00, 0x00, 0x02,
    0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x07,
    0x00, 0x00, 0x30, 0x39, 0x00, 0x00, 0x00, 0x03,
    0x43, 0x11, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
    0x00, 0x00, 0x02, 0x51, 0x02, 0x5c, 0x61, 0xfb,
    0xcf, 0xc0, 0x78, 0xf6, 0x93, 0x34, 0xf8, 0x34,
    0xbe, 0x6d, 0xd2, 0x6d, 0x55, 0xa9, 0x55, 0xc3,
    0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e, 0xde,
    0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89, 0x43,
    0xab, 0x08, 0x59,
]
```

## Outputs

Outputs have four possible types: [`SECP256K1TransferOutput`](#secp-256-k1-transfer-output), [`SECP256K1MintOutput`](#secp-256-k1-mint-output), [`NFTTransferOutput`](#nft-transfer-output) and [`NFTMintOutput`](#nft-mint-output).

## SECP256K1 Transfer Output

A [secp256k1](../untitled-3#secp-256-k1-addresses) transfer output allows for sending a quantity of an asset to a collection of addresses after a specified unix time.

### **What SECP256K1 Transfer Output Contains**

A secp256k1 transfer output contains a `TypeID`, `Amount`, `Locktime`, `Threshold`, and `Addresses`.

* **`TypeID`** is the ID for this output type. It is `0x00000007`.
* **`Amount`** is a long that specifies the quantity of the asset that this output owns. Must be positive.
* **`Locktime`** is a long that contains the unix timestamp that this output can be spent after. The unix timestamp is specific to the second.
* **`Threshold`** is an int that names the number of unique signatures required to spend the output. Must be less than or equal to the length of **`Addresses`**. If **`Addresses`** is empty, must be 0.
* **`Addresses`** is a list of unique addresses that correspond to the private keys that can be used to spend this output. Addresses must be sorted lexicographically.

### **Gantt SECP256K1 Transfer Output Specification**

```
+-----------+------------+--------------------------------+
| type_id   : int        |                        4 bytes |
+-----------+------------+--------------------------------+
| amount    : long       |                        8 bytes |
+-----------+------------+--------------------------------+
| locktime  : long       |                        8 bytes |
+-----------+------------+--------------------------------+
| threshold : int        |                        4 bytes |
+-----------+------------+--------------------------------+
| addresses : [][20]byte |  4 + 20 * len(addresses) bytes |
+-----------+------------+--------------------------------+
                         | 28 + 20 * len(addresses) bytes |
                         +--------------------------------+
```

### **Proto SECP256K1 Transfer Output Specification**

```
message SECP256K1TransferOutput {
    uint32 typeID = 1;            // 04 bytes
    uint64 amount = 2;            // 08 bytes
    uint64 locktime = 3;          // 08 bytes
    uint32 threshold = 4;         // 04 bytes
    repeated bytes addresses = 5; // 04 bytes + 20 bytes * len(addresses)
}
```

### **SECP256K1 Transfer Output Example**

Let’s make a secp256k1 transfer output with:

* **`TypeID`**: `7`
* **`Amount`**: `12345`
* **`Locktime`**: `54321`
* **`Threshold`**: `1`
* **`Addresses`**:
* `0x51025c61fbcfc078f69334f834be6dd26d55a955`
* `0xc3344128e060128ede3523a24a461c8943ab0859`

```
[
    TypeID    <- 0x00000007
    Amount    <- 0x0000000000003039
    Locktime  <- 0x000000000000d431
    Threshold <- 0x00000001
    Addresses <- [
        0x51025c61fbcfc078f69334f834be6dd26d55a955,
        0xc3344128e060128ede3523a24a461c8943ab0859,
    ]
]
=
[
    // typeID:
    0x00, 0x00, 0x00, 0x07,
    // amount:
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x39,
    // locktime:
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd4, 0x31,
    // threshold:
    0x00, 0x00, 0x00, 0x01,
    // number of addresses:
    0x00, 0x00, 0x00, 0x02,
    // addrs[0]:
    0x51, 0x02, 0x5c, 0x61, 0xfb, 0xcf, 0xc0, 0x78,
    0xf6, 0x93, 0x34, 0xf8, 0x34, 0xbe, 0x6d, 0xd2,
    0x6d, 0x55, 0xa9, 0x55,
    // addrs[1]:
    0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
    0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
    0x43, 0xab, 0x08, 0x59,
]
```

## SECP256K1 Mint Output

A [secp256k1](../untitled-3#secp-256-k1-addresses) mint output is an output that is owned by a collection of addresses.

### **What SECP256K1 Mint Output Contains**

A secp256k1 Mint output contains a `TypeID`, `Locktime`, `Threshold`, and `Addresses`.

* **`TypeID`** is the ID for this output type. It is `0x00000006`.
* **`Locktime`** is a long that contains the unix timestamp that this output can be spent after. The unix timestamp is specific to the second.
* **`Threshold`** is an int that names the number of unique signatures required to spend the output. Must be less than or equal to the length of **`Addresses`**. If **`Addresses`** is empty, must be 0.
* **`Addresses`** is a list of unique addresses that correspond to the private keys that can be used to spend this output. Addresses must be sorted lexicographically.

### **Gantt SECP256K1 Mint Output Specification**

```
+-----------+------------+--------------------------------+
| type_id   : int        |                       4 bytes  |
+-----------+------------+--------------------------------+
| locktime  : long       |                       8 bytes  |
+-----------+------------+--------------------------------+
| threshold : int        |                       4 bytes  |
+-----------+------------+--------------------------------+
| addresses : [][20]byte |  4 + 20 * len(addresses) bytes |
+-----------+------------+--------------------------------+
                         | 20 + 20 * len(addresses) bytes |
                         +--------------------------------+
```

### **Proto SECP256K1 Mint Output Specification**

```
message SECP256K1MintOutput {
    uint32 typeID = 1;            // 04 bytes
    uint64 locktime = 2;          // 08 bytes
    uint32 threshold = 3;         // 04 bytes
    repeated bytes addresses = 4; // 04 bytes + 20 bytes * len(addresses)
}
```

### **SECP256K1 Mint Output Example**

Let’s make a SECP256K1 mint output with:

* **`TypeID`**: `6`
* **`Locktime`**: `54321`
* **`Threshold`**: `1`
* **`Addresses`**:
* `0x51025c61fbcfc078f69334f834be6dd26d55a955`
* `0xc3344128e060128ede3523a24a461c8943ab0859`

```
[
    TypeID    <- 0x00000006
    Locktime  <- 0x000000000000d431
    Threshold <- 0x00000001
    Addresses <- [
        0x51025c61fbcfc078f69334f834be6dd26d55a955,
        0xc3344128e060128ede3523a24a461c8943ab0859,
    ]
]
=
[
    // typeID:
    0x00, 0x00, 0x00, 0x06,
    // locktime:
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd4, 0x31,
    // threshold:
    0x00, 0x00, 0x00, 0x01,
    // number of addresses:
    0x00, 0x00, 0x00, 0x02,
    // addrs[0]:
    0x51, 0x02, 0x5c, 0x61, 0xfb, 0xcf, 0xc0, 0x78,
    0xf6, 0x93, 0x34, 0xf8, 0x34, 0xbe, 0x6d, 0xd2,
    0x6d, 0x55, 0xa9, 0x55,
    // addrs[1]:
    0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
    0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
    0x43, 0xab, 0x08, 0x59,
]
```

## NFT Transfer Output

An NFT transfer output is an NFT that is owned by a collection of addresses.

### **What NFT Transfer Output Contains**

An NFT transfer output contains a `TypeID`, `GroupID`, `Payload`, `Locktime`, `Threshold`, and `Addresses`.

* **`TypeID`** is the ID for this output type. It is `0x0000000b`.
* **`GroupID`** is an int that specifies the group this NFT was issued with.
* **`Payload`** is an arbitrary string of bytes no long longer than 1024 bytes.
* **`Locktime`** is a long that contains the unix timestamp that this output can be spent after. The unix timestamp is specific to the second.
* **`Threshold`** is an int that names the number of unique signatures required to spend the output. Must be less than or equal to the length of **`Addresses`**. If **`Addresses`** is empty, must be 0.
* **`Addresses`** is a list of unique addresses that correspond to the private keys that can be used to spend this output. Addresses must be sorted lexicographically.

### **Gantt NFT Transfer Output Specification**

```
+-----------+------------+-------------------------------+
| type_id   : int        |                       4 bytes |
+-----------+------------+-------------------------------+
| group_id  : int        |                       4 bytes |
+-----------+------------+-------------------------------+
| payload   : []byte     |        4 + len(payload) bytes |
+-----------+------------+-------------------------------+
| locktime  : long       |                       8 bytes |
+-----------+------------+-------------------------------+
| threshold : int        |                       4 bytes |
+-----------+------------+-------------------------------+
| addresses : [][20]byte | 4 + 20 * len(addresses) bytes |
+-----------+------------+-------------------------------+
                         |             28 + len(payload) |
                         |  + 20 * len(addresses) bytes  |
                         +-------------------------------+
```

### **Proto NFT Transfer Output Specification**

```
message NFTTransferOutput {
    uint32 typeID = 1;            // 04 bytes
    uint32 group_id = 2;          // 04 bytes
    bytes payload = 3;            // 04 bytes + len(payload)
    uint64 locktime = 4           // 08 bytes
    uint32 threshold = 5;         // 04 bytes
    repeated bytes addresses = 6; // 04 bytes + 20 bytes * len(addresses)
}
```

### **NFT Transfer Output Example**

Let’s make an NFT transfer output with:

* **`TypeID`**: `11`
* **`GroupID`**: `12345`
* **`Payload`**: `0x431100`
* **`Locktime`**: `54321`
* **`Threshold`**: `1`
* **`Addresses`**:
* `0x51025c61fbcfc078f69334f834be6dd26d55a955`
* `0xc3344128e060128ede3523a24a461c8943ab0859`

```
[
    TypeID    <- 0x0000000b
    GroupID   <- 0x00003039
    Payload   <- 0x431100
    Locktime  <- 0x000000000000d431
    Threshold <- 0x00000001
    Addresses <- [
        0x51025c61fbcfc078f69334f834be6dd26d55a955,
        0xc3344128e060128ede3523a24a461c8943ab0859,
    ]
]
=
[
    // TypeID:
    0x00, 0x00, 0x00, 0x0b,
    // groupID:
    0x00, 0x00, 0x30, 0x39,
    // length of payload:
    0x00, 0x00, 0x00, 0x03,
    // payload:
    0x43, 0x11, 0x00,
    // locktime:
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd4, 0x31,
    // threshold:
    0x00, 0x00, 0x00, 0x01,
    // number of addresses:
    0x00, 0x00, 0x00, 0x02,
    // addrs[0]:
    0x51, 0x02, 0x5c, 0x61, 0xfb, 0xcf, 0xc0, 0x78,
    0xf6, 0x93, 0x34, 0xf8, 0x34, 0xbe, 0x6d, 0xd2,
    0x6d, 0x55, 0xa9, 0x55,
    // addrs[1]:
    0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
    0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
    0x43, 0xab, 0x08, 0x59,
]
```

## NFT Mint Output

An NFT mint output is an NFT that is owned by a collection of addresses.

### **What NFT Mint Output Contains**

An NFT Mint output contains a `TypeID`, `GroupID`, `Locktime`, `Threshold`, and `Addresses`.

* **`TypeID`** is the ID for this output type. It is `0x0000000a`.
* **`GroupID`** is an int that specifies the group this NFT is issued to.
* **`Locktime`** is a long that contains the unix timestamp that this output can be spent after. The unix timestamp is specific to the second.
* **`Threshold`** is an int that names the number of unique signatures required to spend the output. Must be less than or equal to the length of **`Addresses`**. If **`Addresses`** is empty, must be 0.
* **`Addresses`** is a list of unique addresses that correspond to the private keys that can be used to spend this output. Addresses must be sorted lexicographically.

### **Gantt NFT Mint Output Specification**

```
+-----------+------------+--------------------------------+
| type_id   : int        |                        4 bytes |
+-----------+------------+--------------------------------+
| group_id  : int        |                        4 bytes |
+-----------+------------+--------------------------------+
| locktime  : long       |                        8 bytes |
+-----------+------------+--------------------------------+
| threshold : int        |                        4 bytes |
+-----------+------------+--------------------------------+
| addresses : [][20]byte |  4 + 20 * len(addresses) bytes |
+-----------+------------+--------------------------------+
                         | 24 + 20 * len(addresses) bytes |
                         +--------------------------------+
```

### **Proto NFT Mint Output Specification**

```
message NFTMintOutput {
    uint32 typeID = 1;            // 04 bytes
    uint32 group_id = 2;          // 04 bytes
    uint64 locktime = 3;          // 08 bytes
    uint32 threshold = 4;         // 04 bytes
    repeated bytes addresses = 5; // 04 bytes + 20 bytes * len(addresses)
}
```

### **NFT Mint Output Example**

Let’s make an NFT mint output with:

* **`TypeID`**: `10`
* **`GroupID`**: `12345`
* **`Locktime`**: `54321`
* **`Threshold`**: `1`
* **`Addresses`**:
* `0x51025c61fbcfc078f69334f834be6dd26d55a955`
* `0xc3344128e060128ede3523a24a461c8943ab0859`

```
[
    TypeID    <- 0x0000000a
    GroupID   <- 0x00003039
    Locktime  <- 0x000000000000d431
    Threshold <- 0x00000001
    Addresses <- [
        0x51025c61fbcfc078f69334f834be6dd26d55a955,
        0xc3344128e060128ede3523a24a461c8943ab0859,
    ]
]
=
[
    // TypeID
    0x00, 0x00, 0x00, 0x0a,
    // groupID:
    0x00, 0x00, 0x30, 0x39,
    // locktime:
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd4, 0x31,
    // threshold:
    0x00, 0x00, 0x00, 0x01,
    // number of addresses:
    0x00, 0x00, 0x00, 0x02,
    // addrs[0]:
    0x51, 0x02, 0x5c, 0x61, 0xfb, 0xcf, 0xc0, 0x78,
    0xf6, 0x93, 0x34, 0xf8, 0x34, 0xbe, 0x6d, 0xd2,
    0x6d, 0x55, 0xa9, 0x55,
    // addrs[1]:
    0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
    0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
    0x43, 0xab, 0x08, 0x59,
]
```

## Inputs

Inputs have one possible type: `SECP256K1TransferInput`.

## SECP256K1 Transfer Input

A [secp256k1](../untitled-3#secp-256-k1-addresses) transfer input allows for spending an unspent secp256k1 transfer output.

### **What SECP256K1 Transfer Input Contains**

A secp256k1 transfer input contains an `Amount` and `AddressIndices`.

* **`TypeID`** is the ID for this input type. It is `0x00000005`.
* **`Amount`** is a long that specifies the quantity that this input should be consuming from the UTXO. Must be positive. Must be equal to the amount specified in the UTXO.
* **`AddressIndices`** is a list of unique ints that define the private keys that are being used to spend the UTXO. Each UTXO has an array of addresses that can spend the UTXO. Each int represents the index in this address array that will sign this transaction. The array must be sorted low to high.

### **Gantt SECP256K1 Transfer Input Specification**

```
+-------------------------+-------------------------------------+
| type_id         : int   |                             4 bytes |
+-----------------+-------+-------------------------------------+
| amount          : long  |                             8 bytes |
+-----------------+-------+-------------------------------------+
| address_indices : []int |  4 + 4 * len(address_indices) bytes |
+-----------------+-------+-------------------------------------+
                          | 16 + 4 * len(address_indices) bytes |
                          +-------------------------------------+
```

### **Proto SECP256K1 Transfer Input Specification**

```
message SECP256K1TransferInput {
    uint32 typeID = 1;                   // 04 bytes
    uint64 amount = 2;                   // 08 bytes
    repeated uint32 address_indices = 3; // 04 bytes + 04 bytes * len(address_indices)
}
```

### **SECP256K1 Transfer Input Example**

Let’s make a payment input with:

* **`TypeId`**: `5`
* **`Amount`**: `123456789`
* **`AddressIndices`**: \[`3`,`7`]

```
[
    TypeID         <- 0x00000005
    Amount         <- 123456789 = 0x00000000075bcd15,
    AddressIndices <- [0x00000003, 0x00000007]
]
=
[
    // type id:
    0x00, 0x00, 0x00, 0x05,
    // amount:
    0x00, 0x00, 0x00, 0x00, 0x07, 0x5b, 0xcd, 0x15,
    // length:
    0x00, 0x00, 0x00, 0x02,
    // sig[0]
    0x00, 0x00, 0x00, 0x03,
    // sig[1]
    0x00, 0x00, 0x00, 0x07,
]
```

## Operations

Operations have three possible types: `SECP256K1MintOperation`, `NFTMintOp`, and `NFTTransferOp`.

## **SECP256K1 Mint Operation**

A [secp256k1](../untitled-3#secp-256-k1-addresses) mint operation consumes a SECP256K1 mint output, creates a new mint output and sends a transfer output to a new set of owners.

### **What SECP256K1 Mint Operation Contains**

A secp256k1 Mint operation contains a `TypeID`, `AddressIndices`, `MintOutput`, and `TransferOutput`.

* **`TypeID`** is the ID for this output type. It is `0x00000008`.
* **`AddressIndices`** is a list of unique ints that define the private keys that are being used to spend the [UTXO](#utxo). Each UTXO has an array of addresses that can spend the UTXO. Each int represents the index in this address array that will sign this transaction. The array must be sorted low to high.
* **`MintOutput`** is a [SECP256K1 Mint output](#secp-256-k1-mint-output-example).
* **`TransferOutput`** is a [SECP256K1 Transfer output](#secp-256-k1-transfer-output).

### **Gantt SECP256K1 Mint Operation Specification**

```
+----------------------------------+------------------------------------+
| type_id         : int            |                            4 bytes |
+----------------------------------+------------------------------------+
| address_indices : []int          | 4 + 4 * len(address_indices) bytes |
+----------------------------------+------------------------------------+
| mint_output     : MintOutput     |            size(mint_output) bytes |
+----------------------------------+------------------------------------+
| transfer_output : TransferOutput |        size(transfer_output) bytes |
+----------------------------------+------------------------------------+
                                   |       8 + 4 * len(address_indices) |
                                   |                + size(mint_output) |
                                   |      + size(transfer_output) bytes |
                                   +------------------------------------+
```

### **Proto SECP256K1 Mint Operation Specification**

```
message SECP256K1MintOperation {
    uint32 typeID = 1;                   // 4 bytes
    repeated uint32 address_indices = 2; // 04 bytes + 04 bytes * len(address_indices)
    MintOutput mint_output = 3;          // size(mint_output
    TransferOutput transfer_output = 4;  // size(transfer_output)
}
```

### **SECP256K1 Mint Operation Example**

Let’s make a [secp256k1](../untitled-3#secp-256-k1-addresses) mint operation with:

* **`TypeId`**: `8`
* **`AddressIndices`**:
* `0x00000003`
* `0x00000007`
* **`MintOutput`**: `“Example SECP256K1 Mint Output from above”`
* **`TransferOutput`**: `“Example SECP256K1 Transfer Output from above”`

```
[
    TypeID <- 0x00000008
    AddressIndices <- [0x00000003, 0x00000007]
    MintOutput <- 0x00000006000000000000d431000000010000000251025c61fbcfc078f69334f834be6dd26d55a955c3344128e060128ede3523a24a461c89
    TransferOutput <- 0x000000070000000000003039000000000000d431000000010000000251025c61fbcfc078f69334f834be6dd26d55a955c3344128e060128ede3523a24a461c8943ab0859
]
=
[
    // typeID
    0x00, 0x00, 0x00, 0x08,
    // number of address_indices:
    0x00, 0x00, 0x00, 0x02,
    // address_indices[0]:
    0x00, 0x00, 0x00, 0x03,
    // address_indices[1]:
    0x00, 0x00, 0x00, 0x07,
    // mint output
    0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0xd4, 0x31, 0x00, 0x00, 0x00, 0x01,
    0x00, 0x00, 0x00, 0x02, 0x51, 0x02, 0x5c, 0x61,
    0xfb, 0xcf, 0xc0, 0x78, 0xf6, 0x93, 0x34, 0xf8,
    0x34, 0xbe, 0x6d, 0xd2, 0x6d, 0x55, 0xa9, 0x55,
    0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
    0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
    0x43, 0xab, 0x08, 0x59,
    // transfer output
    0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x30, 0x39, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0xd4, 0x31, 0x00, 0x00, 0x00, 0x01,
    0x00, 0x00, 0x00, 0x02, 0x51, 0x02, 0x5c, 0x61,
    0xfb, 0xcf, 0xc0, 0x78, 0xf6, 0x93, 0x34, 0xf8,
    0x34, 0xbe, 0x6d, 0xd2, 0x6d, 0x55, 0xa9, 0x55,
    0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
    0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
    0x43, 0xab, 0x08, 0x59,
]
```

## NFT Mint Op

An NFT mint operation consumes an NFT mint output and sends an unspent output to a new set of owners.

### **What NFT Mint Op Contains**

An NFT mint operation contains a `TypeID`, `AddressIndices`, `GroupID`, `Payload`, and `Output` of addresses.

* **`TypeID`** is the ID for this operation type. It is `0x0000000c`.
* **`AddressIndices`** is a list of unique ints that define the private keys that are being used to spend the UTXO. Each UTXO has an array of addresses that can spend the UTXO. Each int represents the index in this address array that will sign this transaction. The array must be sorted low to high.
* **`GroupID`** is an int that specifies the group this NFT is issued to.
* **`Payload`** is an arbitrary string of bytes no longer than 1024 bytes.
* **`Output`** is not a `TransferableOutput`, but rather is a locktime, threshold, and an array of unique addresses that correspond to the private keys that can be used to spend this output. Addresses must be sorted lexicographically.

### **Gantt NFT Mint Op Specification**

```
+------------------------------+------------------------------------+
| type_id         : int        |                            4 bytes |
+-----------------+------------+------------------------------------+
| address_indices : []int      | 4 + 4 * len(address_indices) bytes |
+-----------------+------------+------------------------------------+
| group_id        : int        |                            4 bytes |
+-----------------+------------+------------------------------------+
| payload         : []byte     |             4 + len(payload) bytes |
+-----------------+------------+------------------------------------+
| outputs         : []Output   |            4 + size(outputs) bytes |
+-----------------+------------+------------------------------------+
                               |                               20 + |
                               |         4 * len(address_indices) + |
                               |                     len(payload) + |
                               |                size(outputs) bytes |
                               +------------------------------------+
```

### **Proto NFT Mint Op Specification**

```
message NFTMintOp {
    uint32 typeID = 1;                   // 04 bytes
    repeated uint32 address_indices = 2; // 04 bytes + 04 bytes * len(address_indices)
    uint32 group_id = 3;                 // 04 bytes
    bytes payload = 4;                   // 04 bytes + len(payload)
    repeated bytes outputs = 5;          // 04 bytes + size(outputs)
}
```

### **NFT Mint Op Example**

Let’s make an NFT mint operation with:

* **`TypeId`**: `12`
* **`AddressIndices`**:
  * `0x00000003`
  * `0x00000007`
* **`GroupID`**: `12345`
* **`Payload`**: `0x431100`
* **`Locktime`**: `54321`
* **`Threshold`**: `1`
* **`Addresses`**:
* `0xc3344128e060128ede3523a24a461c8943ab0859`

```
[
    TypeID         <- 0x0000000c
    AddressIndices <- [
        0x00000003,
        0x00000007,
    ]
    GroupID        <- 0x00003039
    Payload        <- 0x431100
    Locktime       <- 0x000000000000d431
    Threshold      <- 0x00000001
    Addresses      <- [
        0xc3344128e060128ede3523a24a461c8943ab0859
    ]
]
=
[
    // Type ID
    0x00, 0x00, 0x00, 0x0c,
    // number of address indices:
    0x00, 0x00, 0x00, 0x02,
    // address index 0:
    0x00, 0x00, 0x00, 0x03,
    // address index 1:
    0x00, 0x00, 0x00, 0x07,
    // groupID:
    0x00, 0x00, 0x30, 0x39,
    // length of payload:
    0x00, 0x00, 0x00, 0x03,
    // payload:
    0x43, 0x11, 0x00,
    // number of outputs:
    0x00, 0x00, 0x00, 0x01,
    // outputs[0]
    // locktime:
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd4, 0x31,
    // threshold:
    0x00, 0x00, 0x00, 0x01,
    // number of addresses:
    0x00, 0x00, 0x00, 0x01,
    // addrs[0]:
    0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
    0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
    0x43, 0xab, 0x08, 0x59,
]
```

## NFT Transfer Op

An NFT transfer operation sends an unspent NFT transfer output to a new set of owners.

### **What NFT Transfer Op Contains**

An NFT transfer operation contains a `TypeID`, `AddressIndices` and an untyped `NFTTransferOutput`.

* **`TypeID`** is the ID for this output type. It is `0x0000000d`.
* **`AddressIndices`** is a list of unique ints that define the private keys that are being used to spend the UTXO. Each UTXO has an array of addresses that can spend the UTXO. Each int represents the index in this address array that will sign this transaction. The array must be sorted low to high.
* **`NFTTransferOutput`** is the output of this operation and must be an [NFT Transfer Output](#nft-transfer-output). This output doesn’t have the **`TypeId`**, because the type is known by the context of being in this operation.

### **Gantt NFT Transfer Op Specification**

```
+------------------------------+------------------------------------+
| type_id         : int        |                            4 bytes |
+-----------------+------------+------------------------------------+
| address_indices : []int      | 4 + 4 * len(address_indices) bytes |
+-----------------+------------+------------------------------------+
| group_id        : int        |                            4 bytes |
+-----------------+------------+------------------------------------+
| payload         : []byte     |             4 + len(payload) bytes |
+-----------------+------------+------------------------------------+
| locktime        : long       |                            8 bytes |
+-----------+------------+------------------------------------------+
| threshold       : int        |                            4 bytes |
+-----------------+------------+------------------------------------+
| addresses       : [][20]byte |      4 + 20 * len(addresses) bytes |
+-----------------+------------+------------------------------------+
                               |                  36 + len(payload) |
                               |        + 4 * len(address_indices)  |
                               |        + 20 * len(addresses) bytes |
                               +------------------------------------+
```

### **Proto NFT Transfer Op Specification**

```
message NFTTransferOp {
    uint32 typeID = 1;                   // 04 bytes
    repeated uint32 address_indices = 2; // 04 bytes + 04 bytes * len(address_indices)
    uint32 group_id = 3;                 // 04 bytes
    bytes payload = 4;                   // 04 bytes + len(payload)
    uint64 locktime = 5;                 // 08 bytes
    uint32 threshold = 6;                // 04 bytes
    repeated bytes addresses = 7;        // 04 bytes + 20 bytes * len(addresses)
}
```

### **NFT Transfer Op Example**

Let’s make an NFT transfer operation with:

* **`TypeID`**: `13`
* **`AddressIndices`**:
* `0x00000007`
* `0x00000003`
* **`GroupID`**: `12345`
* **`Payload`**: `0x431100`
* **`Locktime`**: `54321`
* **`Threshold`**: `1`
* **`Addresses`**:
* `0xc3344128e060128ede3523a24a461c8943ab0859`
* `0x51025c61fbcfc078f69334f834be6dd26d55a955`

```
[
    TypeID         <- 0x0000000d
    AddressIndices <- [
        0x00000007,
        0x00000003,
    ]
    GroupID        <- 0x00003039
    Payload        <- 0x431100
    Locktime       <- 0x000000000000d431
    Threshold      <- 00000001
    Addresses      <- [
        0x51025c61fbcfc078f69334f834be6dd26d55a955,
        0xc3344128e060128ede3523a24a461c8943ab0859,
    ]
]
=
[
    // Type ID
    0x00, 0x00, 0x00, 0x0d,
    // number of address indices:
    0x00, 0x00, 0x00, 0x02,
    // address index 0:
    0x00, 0x00, 0x00, 0x07,
    // address index 1:
    0x00, 0x00, 0x00, 0x03,
    // groupID:
    0x00, 0x00, 0x30, 0x39,
    // length of payload:
    0x00, 0x00, 0x00, 0x03,
    // payload:
    0x43, 0x11, 0x00,
    // locktime:
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd4, 0x31,
    // threshold:
    0x00, 0x00, 0x00, 0x01,
    // number of addresses:
    0x00, 0x00, 0x00, 0x02,
    // addrs[0]:
    0x51, 0x02, 0x5c, 0x61, 0xfb, 0xcf, 0xc0, 0x78,
    0xf6, 0x93, 0x34, 0xf8, 0x34, 0xbe, 0x6d, 0xd2,
    0x6d, 0x55, 0xa9, 0x55,
    // addrs[1]:
    0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
    0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
    0x43, 0xab, 0x08, 0x59,
]
```

## Initial State

Initial state describes the initial state of an asset when it is created. It contains the ID of the feature extension that the asset uses, and a variable length array of outputs that denote the genesis UTXO set of the asset.

### What Initial State Contains

Initial state contains a `FxID` and an array of `Output`.

* **`FxID`** is an int that defines which feature extension this state is part of. For SECP256K1 assets, this is `0x00000000`. For NFT assets, this is `0x00000001`.
* **`Outputs`** is a variable length array of [outputs](#outputs), as defined above.

### Gantt Initial State Specification

```
+---------------+----------+-------------------------------+
| fx_id         : int      |                       4 bytes |
+---------------+----------+-------------------------------+
| outputs       : []Output |       4 + size(outputs) bytes |
+---------------+----------+-------------------------------+
                           |       8 + size(outputs) bytes |
                           +-------------------------------+
```

### Proto Initial State Specification

```
message InitialState {
    uint32 fx_id = 1;                  // 04 bytes
    repeated Output outputs = 2;       // 04 + size(outputs) bytes
}
```

### Initial State Example

Let’s make an initial state:

* `FxID`: `0x00000000`
* `InitialState`: `["Example SECP256K1 Transfer Output from above"]`

```
[
    FxID <- 0x00000000
    InitialState  <- [
        0x000000070000000000003039000000000000d431000000010000000251025c61fbcfc078f69334f834be6dd26d55a955c3344128e060128ede3523a24a461c8943ab0859,
    ]
]
=
[
    // fxID:
    0x00, 0x00, 0x00, 0x00,
    // num outputs:
    0x00, 0x00, 0x00, 0x01,
    // output:
    0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x30, 0x39, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0xd4, 0x31, 0x00, 0x00, 0x00, 0x01,
    0x00, 0x00, 0x00, 0x02, 0x51, 0x02, 0x5c, 0x61,
    0xfb, 0xcf, 0xc0, 0x78, 0xf6, 0x93, 0x34, 0xf8,
    0x34, 0xbe, 0x6d, 0xd2, 0x6d, 0x55, 0xa9, 0x55,
    0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
    0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
    0x43, 0xab, 0x08, 0x59,
]
```

## Credentials

Credentials have two possible types: `SECP256K1Credential`, and `NFTCredential`. Each credential is paired with an Input or Operation. The order of the credentials match the order of the inputs or operations.

## SECP256K1 Credential

A [secp256k1](../untitled-3#secp-256-k1-addresses) credential contains a list of 65-byte recoverable signatures.

### **What SECP256K1 Credential Contains**

* **`TypeID`** is the ID for this type. It is `0x00000009`.
* **`Signatures`** is an array of 65-byte recoverable signatures. The order of the signatures must match the input’s signature indices.

### **Gantt SECP256K1 Credential Specification**

```
+------------------------------+---------------------------------+
| type_id         : int        |                         4 bytes |
+-----------------+------------+---------------------------------+
| signatures      : [][65]byte |  4 + 65 * len(signatures) bytes |
+-----------------+------------+---------------------------------+
                               |  8 + 65 * len(signatures) bytes |
                               +---------------------------------+
```

### **Proto SECP256K1 Credential Specification**

```
message SECP256K1Credential {
    uint32 typeID = 1;             // 4 bytes
    repeated bytes signatures = 2; // 4 bytes + 65 bytes * len(signatures)
}
```

### **SECP256K1 Credential Example**

Let’s make a payment input with:

* **`TypeID`**: `9`
* **`signatures`**:
* `0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1e1d1f202122232425262728292a2b2c2e2d2f303132333435363738393a3b3c3d3e3f00`
* `0x404142434445464748494a4b4c4d4e4f505152535455565758595a5b5c5e5d5f606162636465666768696a6b6c6e6d6f707172737475767778797a7b7c7d7e7f00`

```
[
    TypeID         <- 0x00000009
    Signatures <- [
        0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1e1d1f202122232425262728292a2b2c2e2d2f303132333435363738393a3b3c3d3e3f00,
        0x404142434445464748494a4b4c4d4e4f505152535455565758595a5b5c5e5d5f606162636465666768696a6b6c6e6d6f707172737475767778797a7b7c7d7e7f00,
    ]
]
=
[
    // Type ID
    0x00, 0x00, 0x00, 0x09,
    // length:
    0x00, 0x00, 0x00, 0x02,
    // sig[0]
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1e, 0x1d, 0x1f,
    0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
    0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2e, 0x2d, 0x2f,
    0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
    0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
    0x00,
    // sig[1]
    0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
    0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
    0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
    0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5e, 0x5d, 0x5f,
    0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
    0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6e, 0x6d, 0x6f,
    0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
    0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
    0x00,
]
```

## NFT Credential

An NFT credential is the same as an [secp256k1 credential](#secp-256-k1-credential) with a different TypeID. The TypeID for an NFT credential is `0x0000000e`.

## Unsigned Transactions

Unsigned transactions contain the full content of a transaction with only the signatures missing. Unsigned transactions have four possible types: [`CreateAssetTx`](#what-unsigned-create-asset-tx-contains), [`OperationTx`](https://app.gitbook.com/@nicolas-avalabs/s/avalanche-documentation/~/drafts/-MW-wWlPGhWIPdrdd9pJ/materiel-de-reference/untitled#what-unsigned-create-asset-tx-contains), [`ImportTx`](https://app.gitbook.com/@nicolas-avalabs/s/avalanche-documentation/~/drafts/-MW-wWlPGhWIPdrdd9pJ/materiel-de-reference/untitled#what-unsigned-create-asset-tx-contains), and [`ExportTx`](https://app.gitbook.com/@nicolas-avalabs/s/avalanche-documentation/~/drafts/-MW-wWlPGhWIPdrdd9pJ/materiel-de-reference/untitled#what-unsigned-create-asset-tx-contains). They all embed [`BaseTx`](https://app.gitbook.com/@nicolas-avalabs/s/avalanche-documentation/~/drafts/-MW-wWlPGhWIPdrdd9pJ/materiel-de-reference/untitled#what-unsigned-create-asset-tx-contains), which contains common fields and operations.

### What Base Tx Contains

A base tx contains a `TypeID`, `NetworkID`, `BlockchainID`, `Outputs`, `Inputs`, and `Memo`.

* **`TypeID`** is the ID for this type. It is `0x00000000`.
* **`NetworkID`** is an int that defines which network this transaction is meant to be issued to. This value is meant to support transaction routing and is not designed for replay attack prevention.
* **`BlockchainID`** is a 32-byte array that defines which blockchain this transaction was issued to. This is used for replay attack prevention for transactions that could potentially be valid across network or blockchain.
* **`Outputs`** is an array of [transferable output objects](#transferable-output). Outputs must be sorted lexicographically by their serialized representation. The total quantity of the assets created in these outputs must be less than or equal to the total quantity of each asset consumed in the inputs minus the transaction fee.
* **`Inputs`** is an array of [transferable input objects](#transferable-input). Inputs must be sorted and unique. Inputs are sorted first lexicographically by their **`TxID`** and then by the **`UTXOIndex`** from low to high. If there are inputs that have the same **`TxID`** and **`UTXOIndex`**, then the transaction is invalid as this would result in a double spend.
* **`Memo`** Memo field contains arbitrary bytes, up to 256 bytes.

### Gantt Base Tx Specification

```
+--------------------------------------+-----------------------------------------+
| type_id       : int                  |                                 4 bytes |
+---------------+----------------------+-----------------------------------------+
| network_id    : int                  |                                 4 bytes |
+---------------+----------------------+-----------------------------------------+
| blockchain_id : [32]byte             |                                32 bytes |
+---------------+----------------------+-----------------------------------------+
| outputs       : []TransferableOutput |                 4 + size(outputs) bytes |
+---------------+----------------------+-----------------------------------------+
| inputs        : []TransferableInput  |                  4 + size(inputs) bytes |
+---------------+----------------------+-----------------------------------------+
| memo          : [256]byte            |                    4 + size(memo) bytes |
+---------------+----------------------+-----------------------------------------+
                          | 52 + size(outputs) + size(inputs) + size(memo) bytes |
                          +------------------------------------------------------+
```

### Proto Base Tx Specification

```
message BaseTx {
    uint32 typeID = 1;           // 04 bytes
    uint32 network_id = 2;       // 04 bytes
    bytes blockchain_id = 3;     // 32 bytes
    repeated Output outputs = 4; // 04 bytes + size(outs)
    repeated Input inputs = 5;   // 04 bytes + size(ins)
    bytes memo = 6;              // 04 bytes + size(memo)
}
```

### Base Tx Example

Let’s make an base tx that uses the inputs and outputs from the previous examples:

* **`TypeID`**: `0`
* **`NetworkID`**: `4`
* **`BlockchainID`**: `0xffffffffeeeeeeeeddddddddcccccccbbbbbbbbaaaaaaaa9999999988888888`
* **`Outputs`**:
  * `"Example Transferable Output as defined above"`
* **`Inputs`**:
  * `"Example Transferable Input as defined above"`
* **`Memo`**: `0x00010203`

```
[
    TypeID       <- 0x00000000
    NetworkID    <- 0x00000004
    BlockchainID <- 0xffffffffeeeeeeeeddddddddcccccccbbbbbbbbaaaaaaaa9999999988888888
    Outputs      <- [
        0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f000000070000000000003039000000000000d431000000010000000251025c61fbcfc078f69334f834be6dd26d55a955c3344128e060128ede3523a24a461c8943ab0859
    ]
    Inputs       <- [
        0xf1e1d1c1b1a191817161514131211101f0e0d0c0b0a09080706050403020100000000005000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f0000000500000000075bcd15000000020000000700000003
    ]
    Memo <- 0x00010203
]
=
[
    // typeID
    0x00, 0x00, 0x00, 0x00,
    // networkID:
    0x00, 0x00, 0x00, 0x04,
    // blockchainID:
    0xff, 0xff, 0xff, 0xff, 0xee, 0xee, 0xee, 0xee,
    0xdd, 0xdd, 0xdd, 0xdd, 0xcc, 0xcc, 0xcc, 0xcc,
    0xbb, 0xbb, 0xbb, 0xbb, 0xaa, 0xaa, 0xaa, 0xaa,
    0x99, 0x99, 0x99, 0x99, 0x88, 0x88, 0x88, 0x88,
    // number of outputs:
    0x00, 0x00, 0x00, 0x01,
    // transferable output:
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
    0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x30, 0x39, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0xd4, 0x31, 0x00, 0x00, 0x00, 0x01,
    0x00, 0x00, 0x00, 0x02, 0x51, 0x02, 0x5c, 0x61,
    0xfb, 0xcf, 0xc0, 0x78, 0xf6, 0x93, 0x34, 0xf8,
    0x34, 0xbe, 0x6d, 0xd2, 0x6d, 0x55, 0xa9, 0x55,
    0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
    0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
    0x43, 0xab, 0x08, 0x59,
    // number of inputs:
    0x00, 0x00, 0x00, 0x01,
    // transferable input:
    0xf1, 0xe1, 0xd1, 0xc1, 0xb1, 0xa1, 0x91, 0x81,
    0x71, 0x61, 0x51, 0x41, 0x31, 0x21, 0x11, 0x01,
    0xf0, 0xe0, 0xd0, 0xc0, 0xb0, 0xa0, 0x90, 0x80,
    0x70, 0x60, 0x50, 0x40, 0x30, 0x20, 0x10, 0x00,
    0x00, 0x00, 0x00, 0x05, 0x00, 0x01, 0x02, 0x03,
    0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
    0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13,
    0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b,
    0x1c, 0x1d, 0x1e, 0x1f, 0x00, 0x00, 0x00, 0x05,
    0x00, 0x00, 0x00, 0x00, 0x07, 0x5b, 0xcd, 0x15,
    0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x07,
    0x00, 0x00, 0x00, 0x03,
    // Memo length:
    0x00, 0x00, 0x00, 0x04,
    // Memo:
    0x00, 0x01, 0x02, 0x03,
]
```

### What Unsigned Create Asset Tx Contains

An unsigned create asset tx contains a `BaseTx`, `Name`, `Symbol`, `Denomination`, and `InitialStates`. The `TypeID` is `0x00000001`.

* **`BaseTx`**
* **`Name`** is a human readable string that defines the name of the asset this transaction will create. The name is not guaranteed to be unique. The name must consist of only printable ASCII characters and must be no longer than 128 characters.
* **`Symbol`** is a human readable string that defines the symbol of the asset this transaction will create. The symbol is not guaranteed to be unique. The symbol must consist of only printable ASCII characters and must be no longer than 4 characters.
* **`Denomination`** is a byte that defines the divisibility of the asset this transaction will create. For example, the AVAX token is divisible into billionths. Therefore, the denomination of the AVAX token is 9. The denomination must be no more than 32.
* **`InitialStates`** is a variable length array that defines the feature extensions this asset supports, and the [initial state](#initial-state) of those feature extensions.

### Gantt Unsigned Create Asset Tx Specification

```
+----------------+----------------+--------------------------------------+
| base_tx        : BaseTx         |                  size(base_tx) bytes |
+----------------+----------------+--------------------------------------+
| name           : string         |                  2 + len(name) bytes |
+----------------+----------------+--------------------------------------+
| symbol         : string         |                2 + len(symbol) bytes |
+----------------+----------------+--------------------------------------+
| denomination   : byte           |                              1 bytes |
+----------------+----------------+--------------------------------------+
| initial_states : []InitialState |       4 + size(initial_states) bytes |
+----------------+----------------+--------------------------------------+
                                  | size(base_tx) + size(initial_states) |
                                  |  + 9 + len(name) + len(symbol) bytes |
                                  +--------------------------------------+
```

### Proto Unsigned Create Asset Tx Specification

```
message CreateAssetTx {
    BaseTx base_tx = 1;                       // size(base_tx)
    string name = 2;                          // 2 bytes + len(name)
    name symbol = 3;                          // 2 bytes + len(symbol)
    uint8 denomination = 4;                   // 1 bytes
    repeated InitialState initial_states = 5; // 4 bytes + size(initial_states)
}
```

### Unsigned Create Asset Tx Example

Let’s make an unsigned base tx that uses the inputs and outputs from the previous examples:

* `BaseTx`: `"Example BaseTx as defined above with ID set to 1"`
* `Name`: `Volatility Index`
* `Symbol`: `VIX`
* `Denomination`: `2`
* **`InitialStates`**:
* `"Example Initial State as defined above"`

```
[
    BaseTx        <- 0x0000000100000004ffffffffeeeeeeeeddddddddccccccccbbbbbbbbaaaaaaaa999999998888888800000001000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f000000070000000000003039000000000000d431000000010000000251025c61fbcfc078f69334f834be6dd26d55a955c3344128e060128ede3523a24a461c8943ab085900000001f1e1d1c1b1a191817161514131211101f0e0d0c0b0a09080706050403020100000000005000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f0000000500000000075bcd150000000200000007000000030000000400010203
    Name          <- 0x0010566f6c6174696c69747920496e646578
    Symbol        <- 0x0003564958
    Denomination  <- 0x02
    InitialStates <- [
        0x0000000000000001000000070000000000003039000000000000d431000000010000000251025c61fbcfc078f69334f834be6dd26d55a955c3344128e060128ede3523a24a461c8943ab0859,
    ]
]
=
[
    // base tx:
    0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x04, 
    0xff, 0xff, 0xff, 0xff, 0xee, 0xee, 0xee, 0xee, 
    0xdd, 0xdd, 0xdd, 0xdd, 
    0xcc, 0xcc, 0xcc, 0xcc, 0xbb, 0xbb, 0xbb, 0xbb, 
    0xaa, 0xaa, 0xaa, 0xaa, 0x99, 0x99, 0x99, 0x99, 
    0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x01, 
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 
    0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x30, 0x39, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0xd4, 0x31, 0x00, 0x00, 0x00, 0x01,
    0x00, 0x00, 0x00, 0x02, 0x51, 0x02, 0x5c, 0x61, 
    0xfb, 0xcf, 0xc0, 0x78, 0xf6, 0x93, 0x34, 0xf8, 
    0x34, 0xbe, 0x6d, 0xd2, 0x6d, 0x55, 0xa9, 0x55, 
    0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
    0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
    0x43, 0xab, 0x08, 0x59, 0x00, 0x00, 0x00, 0x01,
    0xf1, 0xe1, 0xd1, 0xc1, 0xb1, 0xa1, 0x91, 0x81,
    0x71, 0x61, 0x51, 0x41, 0x31, 0x21, 0x11, 0x01,
    0xf0, 0xe0, 0xd0, 0xc0, 0xb0, 0xa0, 0x90, 0x80,
    0x70, 0x60, 0x50, 0x40, 0x30, 0x20, 0x10, 0x00,
    0x00, 0x00, 0x00, 0x05, 0x00, 0x01, 0x02, 0x03,
    0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
    0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13,
    0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b,
    0x1c, 0x1d, 0x1e, 0x1f, 0x00, 0x00, 0x00, 0x05,
    0x00, 0x00, 0x00, 0x00, 0x07, 0x5b, 0xcd, 0x15,
    0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x07,
    0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x04,
    0x00, 0x01, 0x02, 0x03
    // name:
    0x00, 0x10, 0x56, 0x6f, 0x6c, 0x61, 0x74, 0x69,
    0x6c, 0x69, 0x74, 0x79, 0x20, 0x49, 0x6e, 0x64,
    0x65, 0x78,
    // symbol length:
    0x00, 0x03,
    // symbol:
    0x56, 0x49, 0x58,
    // denomination:
    0x02,
    // number of InitialStates:
    0x00, 0x00, 0x00, 0x01,
    // InitialStates[0]:
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
    0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x30, 0x39, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0xd4, 0x31, 0x00, 0x00, 0x00, 0x01,
    0x00, 0x00, 0x00, 0x02, 0x51, 0x02, 0x5c, 0x61,
    0xfb, 0xcf, 0xc0, 0x78, 0xf6, 0x93, 0x34, 0xf8,
    0x34, 0xbe, 0x6d, 0xd2, 0x6d, 0x55, 0xa9, 0x55,
    0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
    0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
    0x43, 0xab, 0x08, 0x59,
]
```

### What Unsigned Operation Tx Contains

An unsigned operation tx contains a `BaseTx`, and `Ops`. The `TypeID` for this type is `0x00000002`.

* **`BaseTx`**
* **`Ops`** is a variable-length array of [Transferable Ops.](#transferable-op)

### Gantt Unsigned Operation Tx Specification

```
+---------+--------------+-------------------------------------+
| base_tx : BaseTx       |                 size(base_tx) bytes |
+---------+--------------+-------------------------------------+
| ops     : []TransferOp |                 4 + size(ops) bytes |
+---------+--------------+-------------------------------------+
                         | 4 + size(ops) + size(base_tx) bytes |
                         +-------------------------------------+
```

### Proto Unsigned Operation Tx Specification

```
message OperationTx {
    BaseTx base_tx = 1;          // size(base_tx)
    repeated TransferOp ops = 2; // 4 bytes + size(ops)
}
```

### Unsigned Operation Tx Example

Let’s make an unsigned operation tx that uses the inputs and outputs from the previous examples:

* `BaseTx`: `"Example BaseTx above" with TypeID set to 2`
* **`Ops`**: \[`"Example Transfer Op as defined above"`]

```
[
    BaseTx <- 0x0000000200000004ffffffffeeeeeeeeddddddddccccccccbbbbbbbbaaaaaaaa999999998888888800000001000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f000000070000000000003039000000000000d431000000010000000251025c61fbcfc078f69334f834be6dd26d55a955c3344128e060128ede3523a24a461c8943ab085900000001f1e1d1c1b1a191817161514131211101f0e0d0c0b0a09080706050403020100000000005000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f0000000500000000075bcd150000000200000007000000030000000400010203
    Ops <- [
        0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f00000001f1e1d1c1b1a191817161514131211101f0e0d0c0b0a090807060504030201000000000050000000d0000000200000003000000070000303900000003431100000000010000000251025c61fbcfc078f69334f834be6dd26d55a955c3344128e060128ede3523a24a461c8943ab0859,
    ]
]
=
[
    // base tx:
    0x00, 0x00, 0x00, 0x02,
    0x00, 0x00, 0x00, 0x04, 0xff, 0xff, 0xff, 0xff,
    0xee, 0xee, 0xee, 0xee, 0xdd, 0xdd, 0xdd, 0xdd,
    0xcc, 0xcc, 0xcc, 0xcc, 0xbb, 0xbb, 0xbb, 0xbb,
    0xaa, 0xaa, 0xaa, 0xaa, 0x99, 0x99, 0x99, 0x99,
    0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x01,
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
    0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x30, 0x39, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0xd4, 0x31, 0x00, 0x00, 0x00, 0x01,
    0x00, 0x00, 0x00, 0x02, 0x51, 0x02, 0x5c, 0x61,
    0xfb, 0xcf, 0xc0, 0x78, 0xf6, 0x93, 0x34, 0xf8,
    0x34, 0xbe, 0x6d, 0xd2, 0x6d, 0x55, 0xa9, 0x55,
    0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
    0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
    0x43, 0xab, 0x08, 0x59, 0x00, 0x00, 0x00, 0x01,
    0xf1, 0xe1, 0xd1, 0xc1, 0xb1, 0xa1, 0x91, 0x81,
    0x71, 0x61, 0x51, 0x41, 0x31, 0x21, 0x11, 0x01,
    0xf0, 0xe0, 0xd0, 0xc0, 0xb0, 0xa0, 0x90, 0x80,
    0x70, 0x60, 0x50, 0x40, 0x30, 0x20, 0x10, 0x00,
    0x00, 0x00, 0x00, 0x05, 0x00, 0x01, 0x02, 0x03,
    0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
    0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13,
    0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b,
    0x1c, 0x1d, 0x1e, 0x1f, 0x00, 0x00, 0x00, 0x05,
    0x00, 0x00, 0x00, 0x00, 0x07, 0x5b, 0xcd, 0x15,
    0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x07,
    0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x04,
    0x00, 0x01, 0x02, 0x03
    // number of operations:
    0x00, 0x00, 0x00, 0x01,
    // transfer operation:
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
    0x00, 0x00, 0x00, 0x01, 0xf1, 0xe1, 0xd1, 0xc1,
    0xb1, 0xa1, 0x91, 0x81, 0x71, 0x61, 0x51, 0x41,
    0x31, 0x21, 0x11, 0x01, 0xf0, 0xe0, 0xd0, 0xc0,
    0xb0, 0xa0, 0x90, 0x80, 0x70, 0x60, 0x50, 0x40,
    0x30, 0x20, 0x10, 0x00, 0x00, 0x00, 0x00, 0x05,
    0x00, 0x00, 0x00, 0x0d, 0x00, 0x00, 0x00, 0x02,
    0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x07,
    0x00, 0x00, 0x30, 0x39, 0x00, 0x00, 0x00, 0x03,
    0x43, 0x11, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
    0x00, 0x00, 0x02, 0x51, 0x02, 0x5c, 0x61, 0xfb,
    0xcf, 0xc0, 0x78, 0xf6, 0x93, 0x34, 0xf8, 0x34,
    0xbe, 0x6d, 0xd2, 0x6d, 0x55, 0xa9, 0x55, 0xc3,
    0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e, 0xde,
    0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89, 0x43,
    0xab, 0x08, 0x59,
]
```

### What Unsigned Import Tx Contains

An unsigned import tx contains a `BaseTx`, `SourceChain` and `Ins`. \* The `TypeID`for this type is `0x00000003`.

* **`BaseTx`**
* **`SourceChain`** is a 32-byte source blockchain ID.
* **`Ins`** is a variable length array of [Transferable Inputs](https://app.gitbook.com/@nicolas-avalabs/s/avalanche-documentation/~/drafts/-MW-wWlPGhWIPdrdd9pJ/materiel-de-reference/untitled#transferable-input).

### Gantt Unsigned Import Tx Specification

```
+---------+----------------------+-----------------------------+
| base_tx : BaseTx               |         size(base_tx) bytes |
+-----------------+--------------+-----------------------------+
| source_chain    : [32]byte     |                    32 bytes |
+---------+----------------------+-----------------------------+
| ins     : []TransferIn         |         4 + size(ins) bytes |
+---------+----------------------+-----------------------------+
                        | 36 + size(ins) + size(base_tx) bytes |
                        +--------------------------------------+
```

### Proto Unsigned Import Tx Specification

```
message ImportTx {
    BaseTx base_tx = 1;          // size(base_tx)
    bytes source_chain = 2;      // 32 bytes
    repeated TransferIn ins = 3; // 4 bytes + size(ins)
}
```

### Unsigned Import Tx Example

Let’s make an unsigned import tx that uses the inputs from the previous examples:

* `BaseTx`: `“Example BaseTx as defined above”`, but with `TypeID` set to `3`
* `SourceChain`: `0x0000000000000000000000000000000000000000000000000000000000000000`
* `Ins`: `“Example SECP256K1 Transfer Input as defined above”`

```
[
    BaseTx        <- 0x0000000300000004ffffffffeeeeeeeeddddddddccccccccbbbbbbbbaaaaaaaa999999998888888800000001000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f000000070000000000003039000000000000d431000000010000000251025c61fbcfc078f69334f834be6dd26d55a955c3344128e060128ede3523a24a461c8943ab085900000001f1e1d1c1b1a191817161514131211101f0e0d0c0b0a09080706050403020100000000005000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f0000000500000000075bcd150000000200000007000000030000000400010203
    SourceChain <- 0x0000000000000000000000000000000000000000000000000000000000000000
    Ins <- [
        f1e1d1c1b1a191817161514131211101f0e0d0c0b0a09080706050403020100000000005000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f0000000500000000075bcd15000000020000000300000007,
    ]
]
=
[
    // base tx:
    0x00, 0x00, 0x00, 0x03,
    0x00, 0x00, 0x00, 0x04, 0xff, 0xff, 0xff, 0xff,
    0xee, 0xee, 0xee, 0xee, 0xdd, 0xdd, 0xdd, 0xdd,
    0xcc, 0xcc, 0xcc, 0xcc, 0xbb, 0xbb, 0xbb, 0xbb,
    0xaa, 0xaa, 0xaa, 0xaa, 0x99, 0x99, 0x99, 0x99,
    0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x01,
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
    0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x30, 0x39, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0xd4, 0x31, 0x00, 0x00, 0x00, 0x01,
    0x00, 0x00, 0x00, 0x02, 0x51, 0x02, 0x5c, 0x61,
    0xfb, 0xcf, 0xc0, 0x78, 0xf6, 0x93, 0x34, 0xf8,
    0x34, 0xbe, 0x6d, 0xd2, 0x6d, 0x55, 0xa9, 0x55,
    0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
    0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
    0x43, 0xab, 0x08, 0x59, 0x00, 0x00, 0x00, 0x01,
    0xf1, 0xe1, 0xd1, 0xc1, 0xb1, 0xa1, 0x91, 0x81,
    0x71, 0x61, 0x51, 0x41, 0x31, 0x21, 0x11, 0x01,
    0xf0, 0xe0, 0xd0, 0xc0, 0xb0, 0xa0, 0x90, 0x80,
    0x70, 0x60, 0x50, 0x40, 0x30, 0x20, 0x10, 0x00,
    0x00, 0x00, 0x00, 0x05, 0x00, 0x01, 0x02, 0x03,
    0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
    0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13,
    0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b,
    0x1c, 0x1d, 0x1e, 0x1f, 0x00, 0x00, 0x00, 0x05,
    0x00, 0x00, 0x00, 0x00, 0x07, 0x5b, 0xcd, 0x15,
    0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x07,
    0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x04,
    0x00, 0x01, 0x02, 0x03
    // source chain:
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    // input count:
    0x00, 0x00, 0x00, 0x01,
    // txID:
    0xf1, 0xe1, 0xd1, 0xc1, 0xb1, 0xa1, 0x91, 0x81,
    0x71, 0x61, 0x51, 0x41, 0x31, 0x21, 0x11, 0x01,
    0xf0, 0xe0, 0xd0, 0xc0, 0xb0, 0xa0, 0x90, 0x80,
    0x70, 0x60, 0x50, 0x40, 0x30, 0x20, 0x10, 0x00,
    // utxoIndex:
    0x00, 0x00, 0x00, 0x05,
    // assetID:
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
    // input:
    0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00,
    0x07, 0x5b, 0xcd, 0x15, 0x00, 0x00, 0x00, 0x02,
    0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x07,
]
```

### What Unsigned Export Tx Contains

An unsigned export tx contains a `BaseTx`, `DestinationChain`, and `Outs`. The `TypeID` for this type is `0x00000004`.

* **`DestinationChain`** is the 32 byte ID of the chain where the funds are being exported to.
* **`Outs`** is a variable length array of [Transferable Outputs](#transferable-output).

### Gantt Unsigned Export Tx Specification

```
+-------------------+---------------+--------------------------------------+
| base_tx           : BaseTx        |                  size(base_tx) bytes |
+-------------------+---------------+--------------------------------------+
| destination_chain : [32]byte      |                             32 bytes |
+-------------------+---------------+--------------------------------------+
| outs              : []TransferOut |                 4 + size(outs) bytes |
+-------------------+---------------+--------------------------------------+
                          | 36 + size(outs) + size(base_tx) bytes |
                          +---------------------------------------+
```

### Proto Unsigned Export Tx Specification

```
message ExportTx {
    BaseTx base_tx = 1;            // size(base_tx)
    bytes destination_chain = 2;   // 32 bytes
    repeated TransferOut outs = 3; // 4 bytes + size(outs)
}
```

### Unsigned Export Tx Example

Let’s make an unsigned export tx that uses the outputs from the previous examples:

* `BaseTx`: `“Example BaseTx as defined above”`, but with `TypeID` set to `4`
* `DestinationChain`: `0x0000000000000000000000000000000000000000000000000000000000000000`
* `Outs`: `“Example SECP256K1 Transfer Output as defined above”`

```
[
    BaseTx           <- 0x0000000400000004ffffffffeeeeeeeeddddddddccccccccbbbbbbbbaaaaaaaa999999998888888800000001000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f000000070000000000003039000000000000d431000000010000000251025c61fbcfc078f69334f834be6dd26d55a955c3344128e060128ede3523a24a461c8943ab085900000001f1e1d1c1b1a191817161514131211101f0e0d0c0b0a09080706050403020100000000005000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f0000000500000000075bcd150000000200000007000000030000000400010203
    DestinationChain <- 0x0000000000000000000000000000000000000000000000000000000000000000
    Outs <- [
        000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f000000070000000000003039000000000000d431000000010000000251025c61fbcfc078f69334f834be6dd26d55a955c3344128e060128ede3523a24a461c8943ab0859,
    ]
]
=
[
    // base tx:
    0x00, 0x00, 0x00, 0x04
    0x00, 0x00, 0x00, 0x04, 0xff, 0xff, 0xff, 0xff,
    0xee, 0xee, 0xee, 0xee, 0xdd, 0xdd, 0xdd, 0xdd,
    0xcc, 0xcc, 0xcc, 0xcc, 0xbb, 0xbb, 0xbb, 0xbb,
    0xaa, 0xaa, 0xaa, 0xaa, 0x99, 0x99, 0x99, 0x99,
    0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x01,
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
    0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x30, 0x39, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0xd4, 0x31, 0x00, 0x00, 0x00, 0x01,
    0x00, 0x00, 0x00, 0x02, 0x51, 0x02, 0x5c, 0x61,
    0xfb, 0xcf, 0xc0, 0x78, 0xf6, 0x93, 0x34, 0xf8,
    0x34, 0xbe, 0x6d, 0xd2, 0x6d, 0x55, 0xa9, 0x55,
    0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
    0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
    0x43, 0xab, 0x08, 0x59, 0x00, 0x00, 0x00, 0x01,
    0xf1, 0xe1, 0xd1, 0xc1, 0xb1, 0xa1, 0x91, 0x81,
    0x71, 0x61, 0x51, 0x41, 0x31, 0x21, 0x11, 0x01,
    0xf0, 0xe0, 0xd0, 0xc0, 0xb0, 0xa0, 0x90, 0x80,
    0x70, 0x60, 0x50, 0x40, 0x30, 0x20, 0x10, 0x00,
    0x00, 0x00, 0x00, 0x05, 0x00, 0x01, 0x02, 0x03,
    0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
    0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13,
    0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b,
    0x1c, 0x1d, 0x1e, 0x1f, 0x00, 0x00, 0x00, 0x05,
    0x00, 0x00, 0x00, 0x00, 0x07, 0x5b, 0xcd, 0x15,
    0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x07,
    0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x04,
    0x00, 0x01, 0x02, 0x03
    // destination_chain:
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    // outs[] count:
    0x00, 0x00, 0x00, 0x01,
    // assetID:
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
    // output:
    0x00, 0x00, 0x00, 0x07,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x39,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd4, 0x31,
    0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x02,
    0x51, 0x02, 0x5c, 0x61, 0xfb, 0xcf, 0xc0, 0x78,
    0xf6, 0x93, 0x34, 0xf8, 0x34, 0xbe, 0x6d, 0xd2,
    0x6d, 0x55, 0xa9, 0x55, 0xc3, 0x34, 0x41, 0x28,
    0xe0, 0x60, 0x12, 0x8e, 0xde, 0x35, 0x23, 0xa2,
    0x4a, 0x46, 0x1c, 0x89, 0x43, 0xab, 0x08, 0x59,
]
```

## Signed Transaction

A signed transaction is an unsigned transaction with the addition of an array of [credentials](#credentials).

### What Signed Transaction Contains

A signed transaction contains a `CodecID`, `UnsignedTx`, and `Credentials`.

* **`CodecID`** The only current valid codec id is `00 00`.
* **`UnsignedTx`** is an unsigned transaction, as described above.
* **`Credentials`** is an array of [credentials](#credentials). Each credential will be paired with the input in the same index at this credential.

### Gantt Signed Transaction Specification

```
+---------------------+--------------+------------------------------------------------+
| codec_id            : uint16       |                                        2 bytes |
+---------------------+--------------+------------------------------------------------+
| unsigned_tx         : UnsignedTx   |                        size(unsigned_tx) bytes |
+---------------------+--------------+------------------------------------------------+
| credentials         : []Credential |                    4 + size(credentials) bytes |
+---------------------+--------------+------------------------------------------------+
                                     | 6 + size(unsigned_tx) + len(credentials) bytes |
                                     +------------------------------------------------+
```

### Proto Signed Transaction Specification

```
message Tx {
    uint16 codec_id = 1;                 // 2 bytes
    UnsignedTx unsigned_tx = 2;          // size(unsigned_tx)
    repeated Credential credentials = 3; // 4 bytes + size(credentials)
}
```

### Signed Transaction Example

Let’s make a signed transaction that uses the unsigned transaction and credentials from the previous examples.

* **`CodecID`**: `0`
* **`UnsignedTx`**: `0x0000000100000004ffffffffeeeeeeeeddddddddccccccccbbbbbbbbaaaaaaaa999999998888888800000001000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f000000070000000000003039000000000000d431000000010000000251025c61fbcfc078f69334f834be6dd26d55a955c3344128e060128ede3523a24a461c8943ab085900000001f1e1d1c1b1a191817161514131211101f0e0d0c0b0a09080706050403020100000000005000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f0000000500000000075bcd150000000200000007000000030000000400010203`
* **`Credentials`** `0x0000000900000002000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1e1d1f202122232425262728292a2b2c2e2d2f303132333435363738393a3b3c3d3e3f00404142434445464748494a4b4c4d4e4f505152535455565758595a5b5c5e5d5f606162636465666768696a6b6c6e6d6f707172737475767778797a7b7c7d7e7f00`

```
[
    CodecID     <- 0x0000
    UnsignedTx  <- 0x0000000100000004ffffffffeeeeeeeeddddddddccccccccbbbbbbbbaaaaaaaa999999998888888800000001000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f000000070000000000003039000000000000d431000000010000000251025c61fbcfc078f69334f834be6dd26d55a955c3344128e060128ede3523a24a461c8943ab085900000001f1e1d1c1b1a191817161514131211101f0e0d0c0b0a09080706050403020100000000005000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f0000000500000000075bcd150000000200000007000000030000000400010203
    Credentials <- [
        0x0000000900000002000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1e1d1f202122232425262728292a2b2c2e2d2f303132333435363738393a3b3c3d3e3f00404142434445464748494a4b4c4d4e4f505152535455565758595a5b5c5e5d5f606162636465666768696a6b6c6e6d6f707172737475767778797a7b7c7d7e7f00,
    ]
]
=
[
    // Codec ID
    0x00, 0x00,
    // unsigned transaction:
    0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x04, 
    0xff, 0xff, 0xff, 0xff, 0xee, 0xee, 0xee, 0xee,
    0xdd, 0xdd, 0xdd, 0xdd, 0xcc, 0xcc, 0xcc, 0xcc,
    0xbb, 0xbb, 0xbb, 0xbb, 0xaa, 0xaa, 0xaa, 0xaa, 
    0x99, 0x99, 0x99, 0x99, 0x88, 0x88, 0x88, 0x88,
    0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x02, 0x03, 
    0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
    0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13,
    0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b,
    0x1c, 0x1d, 0x1e, 0x1f, 0x00, 0x00, 0x00, 0x07,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x39,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd4, 0x31,
    0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x02,
    0x51, 0x02, 0x5c, 0x61, 0xfb, 0xcf, 0xc0, 0x78, 
    0xf6, 0x93, 0x34, 0xf8, 0x34, 0xbe, 0x6d, 0xd2,
    0x6d, 0x55, 0xa9, 0x55, 0xc3, 0x34, 0x41, 0x28,
    0xe0, 0x60, 0x12, 0x8e, 0xde, 0x35, 0x23, 0xa2,
    0x4a, 0x46, 0x1c, 0x89, 0x43, 0xab, 0x08, 0x59,
    0x00, 0x00, 0x00, 0x01, 0xf1, 0xe1, 0xd1, 0xc1,
    0xb1, 0xa1, 0x91, 0x81, 0x71, 0x61, 0x51, 0x41,
    0x31, 0x21, 0x11, 0x01, 0xf0, 0xe0, 0xd0, 0xc0,
    0xb0, 0xa0, 0x90, 0x80, 0x70, 0x60, 0x50, 0x40,
    0x30, 0x20, 0x10, 0x00, 0x00, 0x00, 0x00, 0x05,
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
    0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00,
    0x07, 0x5b, 0xcd, 0x15, 0x00, 0x00, 0x00, 0x02,
    0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x03,
    0x00, 0x00, 0x00, 0x04, 0x00, 0x01, 0x02, 0x03
    // number of credentials:
    0x00, 0x00, 0x00, 0x01,
    // credential[0]:
    0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00, 0x02,
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1e, 0x1d, 0x1f,
    0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
    0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2e, 0x2d, 0x2f,
    0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
    0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
    0x00, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46,
    0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e,
    0x4f, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56,
    0x57, 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5e, 0x5d,
    0x5f, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66,
    0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6e, 0x6d,
    0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76,
    0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e,
    0x7f, 0x00,
```

## UTXO

A UTXO is a standalone representation of a transaction output.

### What UTXO Contains

A UTXO contains a `CodecID`, `TxID`, `UTXOIndex`, `AssetID`, and `Output`.

* **`CodecID`** The only valid `CodecID` is `00 00`
* **`TxID`** is a 32-byte transaction ID. Transaction IDs are calculated by taking sha256 of the bytes of the signed transaction.
* **`UTXOIndex`** is an int that specifies which output in the transaction specified by **`TxID`** that this utxo was created by.
* **`AssetID`** is a 32-byte array that defines which asset this utxo references.
* **`Output`** is the [output](#outputs) object that created this utxo. The serialization of Outputs was defined above.

### Gantt UTXO Specification

```
+--------------+----------+-------------------------+
| codec_id     : uint16   |                 2 bytes |
+--------------+----------+-------------------------+
| tx_id        : [32]byte |                32 bytes |
+--------------+----------+-------------------------+
| output_index : int      |                 4 bytes |
+--------------+----------+-------------------------+
| asset_id     : [32]byte |                32 bytes |
+--------------+----------+-------------------------+
| output       : Output   |      size(output) bytes |
+--------------+----------+-------------------------+
                          | 70 + size(output) bytes |
                          +-------------------------+
```

### Proto UTXO Specification

```
message Utxo {
    uint16 codec_id = 1;     // 02 bytes
    bytes tx_id = 2;         // 32 bytes
    uint32 output_index = 3; // 04 bytes
    bytes asset_id = 4;      // 32 bytes
    Output output = 5;       // size(output)
}
```

### UTXO Example

Let’s make a UTXO from the signed transaction created above:

* **`CodecID`**: `0`
* **`TxID`**: `0xf966750f438867c3c9828ddcdbe660e21ccdbb36a9276958f011ba472f75d4e7`
* **`UTXOIndex`**: `0` = `0x00000000`
* **`AssetID`**: `0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f`
* **`Output`**: `"Example SECP256K1 Transferable Output as defined above"`

```
[
    CodecID   <- 0x0000
    TxID      <- 0xf966750f438867c3c9828ddcdbe660e21ccdbb36a9276958f011ba472f75d4e7
    UTXOIndex <- 0x00000000
    AssetID   <- 0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f
    Output    <-     0x000000070000000000003039000000000000d431000000010000000251025c61fbcfc078f69334f834be6dd26d55a955c3344128e060128ede3523a24a461c8943ab0859
]
=
[
    // Codec ID:
    0x00, 0x00,
    // txID:
    0xf9, 0x66, 0x75, 0x0f, 0x43, 0x88, 0x67, 0xc3,
    0xc9, 0x82, 0x8d, 0xdc, 0xdb, 0xe6, 0x60, 0xe2,
    0x1c, 0xcd, 0xbb, 0x36, 0xa9, 0x27, 0x69, 0x58,
    0xf0, 0x11, 0xba, 0x47, 0x2f, 0x75, 0xd4, 0xe7,
    // utxo index:
    0x00, 0x00, 0x00, 0x00,
    // assetID:
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
    // output:
    0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x30, 0x39, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0xd4, 0x31, 0x00, 0x00, 0x00, 0x01,
    0x00, 0x00, 0x00, 0x02, 0x00, 0x01, 0x02, 0x03,
    0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
    0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13,
    0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b,
    0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
    0x24, 0x25, 0x26, 0x27,
]
```
