X-Chain API

The X-Chain , Avalanche’s native platform for creating and trading assets, is an instance of the Avalanche Virtual Machine (AVM). This API allows clients to create and trade assets on the X-Chain and other instances of the AVM.

Format ​

This API uses the json 2.0 RPC format. For more information on making JSON RPC calls, see here .

Endpoints ​

/ext/bc/X to interact with the X-Chain.

/ext/bc/blockchainID to interact with other AVM instances, where blockchainID is the ID of a blockchain running the AVM.

Methods ​

avm.buildGenesis ​

Given a JSON representation of this Virtual Machine’s genesis state, create the byte representation of that state.

Endpoint ​

This call is made to the AVM’s static API endpoint:

/ext/vm/avm

Note: addresses should not include a chain prefix (that is X- ) in calls to the static API endpoint because these prefixes refer to a specific chain.

Signature:

avm.buildGenesis({
    networkID: int,
    genesisData: JSON,
    encoding: string, //optional
}) -> {
    bytes: string,
    encoding: string,
}

Encoding specifies the encoding format to use for arbitrary bytes, that is the genesis bytes that are returned. Can only be hex when a value is provided.

genesisData has this form:

{
"genesisData" :
    {
        "assetAlias1": {               // Each object defines an asset
            "name": "human readable name",
            "symbol":"AVAL",           // Symbol is between 0 and 4 characters
            "initialState": {
                "fixedCap" : [         // Choose the asset type.
                    {                  // Can be "fixedCap", "variableCap", "limitedTransfer", "nonFungible"
                        "amount":1000, // At genesis, address A has
                        "address":"A"  // 1000 units of asset
                    },
                    {
                        "amount":5000, // At genesis, address B has
                        "address":"B"  // 1000 units of asset
                    },
                    ...                // Can have many initial holders
                ]
            }
        },
        "assetAliasCanBeAnythingUnique": { // Asset alias can be used in place of assetID in calls
            "name": "human readable name", // names need not be unique
            "symbol": "AVAL",              // symbols need not be unique
            "initialState": {
                "variableCap" : [          // No units of the asset exist at genesis
                    {
                        "minters": [       // The signature of A or B can mint more of
                            "A",           // the asset.
                            "B"
                        ],
                        "threshold":1
                    },
                    {
                        "minters": [       // The signatures of 2 of A, B and C can mint
                            "A",           // more of the asset
                            "B",
                            "C"
                        ],
                        "threshold":2
                    },
                    ...                    // Can have many minter sets
                ]
            }
        },
        ...                                // Can list more assets
    }
}

Example Call:

curl -X POST --data '{
    "jsonrpc": "2.0",
    "id"     : 1,
    "method" : "avm.buildGenesis",
    "params" : {
        "networkId": 16,
        "genesisData": {
            "asset1": {
                "name": "myFixedCapAsset",
                "symbol":"MFCA",
                "initialState": {
                    "fixedCap" : [
                        {
                            "amount":100000,
                            "address": "avax13ery2kvdrkd2nkquvs892gl8hg7mq4a6ufnrn6"
                        },
                        {
                            "amount":100000,
                            "address": "avax1rvks3vpe4cm9yc0rrk8d5855nd6yxxutfc2h2r"
                        },
                        {
                            "amount":50000,
                            "address": "avax1ntj922dj4crc4pre4e0xt3dyj0t5rsw9uw0tus"
                        },
                        {
                            "amount":50000,
                            "address": "avax1yk0xzmqyyaxn26sqceuky2tc2fh2q327vcwvda"
                        }
                    ]
                }
            },
            "asset2": {
                "name": "myVarCapAsset",
                "symbol":"MVCA",
                "initialState": {
                    "variableCap" : [
                        {
                            "minters": [
                                "avax1kcfg6avc94ct3qh2mtdg47thsk8nrflnrgwjqr",
                                "avax14e2s22wxvf3c7309txxpqs0qe9tjwwtk0dme8e"
                            ],
                            "threshold":1
                        },
                        {
                            "minters": [
                                "avax1y8pveyn82gjyqr7kqzp72pqym6xlch9gt5grck",
                                "avax1c5cmm0gem70rd8dcnpel63apzfnfxye9kd4wwe",
                                "avax12euam2lwtwa8apvfdl700ckhg86euag2hlhmyw"
                            ],
                            "threshold":2
                        }
                    ]
                }
            }
        },
        "encoding": "hex"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/vm/avm

Example Response:

{
  "jsonrpc": "2.0",
  "result": {
    "bytes": "0x0000000000010006617373657431000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000f6d794669786564436170417373657400044d464341000000000100000000000000010000000700000000000186a10000000000000000000000010000000152b219bc1b9ab0a9f2e3f9216e4460bd5db8d153bfa57c3c",
    "encoding": "hex"
  },
  "id": 1
}

avm.createAddress ​

Create a new address controlled by the given user.

Signature:

avm.createAddress({
    username: string,
    password: string
}) -> {address: string}

Example Call:

curl -X POST --data '{
    "jsonrpc": "2.0",
    "method": "avm.createAddress",
    "params": {
        "username": "myUsername",
        "password": "myPassword"
    },
    "id": 1
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "result": {
    "address": "X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5"
  },
  "id": 1
}

avm.createFixedCapAsset ​

Create a new fixed-cap, fungible asset. A quantity of it is created at initialization and then no more is ever created. The asset can be sent with avm.send .

Signature:

avm.createFixedCapAsset({
    name: string,
    symbol: string,
    denomination: int, //optional
    initialHolders: []{
        address: string,
        amount: int
    },
    from: []string, //optional
    changeAddr: string, //optional
    username: string,
    password: string
}) ->
{
    assetID: string,
    changeAddr: string
}

• name is a human-readable name for the asset. Not necessarily unique.
• symbol is a shorthand symbol for the asset. Between 0 and 4 characters. Not necessarily unique. May be omitted.
• denomination determines how balances of this asset are displayed by user interfaces. If denomination is 0, 100 units of this asset are displayed as 100. If denomination is 1, 100 units of this asset are displayed as 10.0. If denomination is 2, 100 units of this asset are displayed as 1.00, etc. Defaults to 0.
• from are the addresses that you want to use for this operation. If omitted, uses any of your addresses as needed.
• changeAddr is the address any change will be sent to. If omitted, change is sent to one of the addresses controlled by the user.
• username and password denote the user paying the transaction fee.
• Each element in initialHolders specifies that address holds amount units of the asset at genesis.
• assetID is the ID of the new asset.

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     : 1,
    "method" :"avm.createFixedCapAsset",
    "params" :{
        "name": "myFixedCapAsset",
        "symbol":"MFCA",
        "initialHolders": [
            {
                "address": "X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
                "amount": 10000
            },
            {
                "address":"X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
                "amount":50000
            }
        ],
        "from":["X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5"],
        "changeAddr":"X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8",
        "username":"myUsername",
        "password":"myPassword"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "assetID": "ZiKfqRXCZgHLgZ4rxGU9Qbycdzuq5DRY4tdSNS9ku8kcNxNLD",
    "changeAddr": "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8"
  }
}

avm.createNFTAsset ​

Create a new non-fungible asset. No units of the asset exist at initialization. Minters can mint units of this asset using avm.mintNFT .

Signature:

avm.createNFTAsset({
    name: string,
    symbol: string,
    minterSets: []{
        minters: []string,
        threshold: int
    },
    from: []string, //optional
    changeAddr: string, //optional
    username: string,
    password: string
}) ->
 {
    assetID: string,
    changeAddr: string,
}

• name is a human-readable name for the asset. Not necessarily unique.
• symbol is a shorthand symbol for the asset. Between 0 and 4 characters. Not necessarily unique. May be omitted.
• minterSets is a list where each element specifies that threshold of the addresses in minters may together mint more of the asset by signing a minting transaction.
• from are the addresses that you want to use for this operation. If omitted, uses any of your addresses as needed.
• changeAddr is the address any change will be sent to. If omitted, change is sent to one of the addresses controlled by the user.
• username pays the transaction fee.
• assetID is the ID of the new asset.
• changeAddr in the result is the address where any change was sent.

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     : 1,
    "method" :"avm.createNFTAsset",
    "params" :{
        "name":"Coincert",
        "symbol":"TIXX",
        "minterSets":[
            {
                "minters":[
                    "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8"
                ],
                "threshold": 1
            }
        ],
        "from": ["X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8"],
        "changeAddr": "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8",
        "username":"myUsername",
        "password":"myPassword"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "result": {
    "assetID": "2KGdt2HpFKpTH5CtGZjYt5XPWs6Pv9DLoRBhiFfntbezdRvZWP",
    "changeAddr": "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8"
  },
  "id": 1
}

avm.createVariableCapAsset ​

Create a new variable-cap, fungible asset. No units of the asset exist at initialization. Minters can mint units of this asset using avm.mint .

Signature:

avm.createVariableCapAsset({
    name: string,
    symbol: string,
    denomination: int, //optional
    minterSets: []{
        minters: []string,
        threshold: int
    },
    from: []string, //optional
    changeAddr: string, //optional
    username: string,
    password: string
}) ->
{
    assetID: string,
    changeAddr: string,
}

• name is a human-readable name for the asset. Not necessarily unique.
• symbol is a shorthand symbol for the asset. Between 0 and 4 characters. Not necessarily unique. May be omitted.
• denomination determines how balances of this asset are displayed by user interfaces. If denomination is 0, 100 units of this asset are displayed as 100. If denomination is 1, 100 units of this asset are displayed as 10.0. If denomination is 2, 100 units of this asset are displays as .100, etc.
• minterSets is a list where each element specifies that threshold of the addresses in minters may together mint more of the asset by signing a minting transaction.
• from are the addresses that you want to use for this operation. If omitted, uses any of your addresses as needed.
• changeAddr is the address any change will be sent to. If omitted, change is sent to one of the addresses controlled by the user.
• username pays the transaction fee.
• assetID is the ID of the new asset.
• changeAddr in the result is the address where any change was sent.

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     : 1,
    "method" :"avm.createVariableCapAsset",
    "params" :{
        "name":"myVariableCapAsset",
        "symbol":"MFCA",
        "minterSets":[
            {
                "minters":[
                    "X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5"
                ],
                "threshold": 1
            },
            {
                "minters": [
                    "X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
                    "X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
                    "X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5"
                ],
                "threshold": 2
            }
        ],
        "from":["X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5"],
        "changeAddr":"X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8",
        "username":"myUsername",
        "password":"myPassword"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "assetID": "2QbZFE7J4MAny9iXHUwq8Pz8SpFhWk3maCw4SkinVPv6wPmAbK",
    "changeAddr": "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8"
  }
}

avm.export ​

::: Not recommended for use on Mainnet. See warning notice in Keystore API . :::

Send an asset from the X-Chain to the P-Chain or C-Chain. After calling this method, you must call the C-Chain's avax.import or the P-Chain's platform.importAVAX to complete the transfer.

Signature:

avm.export({
    to: string,
    amount: int,
    assetID: string,
    from: []string, //optional
    changeAddr: string, //optional
    username: string,
    password: string,
}) ->
{
    txID: string,
    changeAddr: string,
}

• to is the P-Chain or C-Chain address the asset is sent to.

• amount is the amount of the asset to send.

• assetID is the asset id of the asset which is sent. Use AVAX for AVAX exports.

• from are the addresses that you want to use for this operation. If omitted, uses any of your addresses as needed.

• changeAddr is the address any change will be sent to. If omitted, change is sent to one of the addresses controlled by the user.

• The asset is sent from addresses controlled by username

• password is username ‘s password.

• txID is this transaction’s ID.

• changeAddr in the result is the address where any change was sent.

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"avm.export",
    "params" :{
        "to":"C-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
        "amount": 10,
        "assetID": "AVAX",
        "from":["X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5"],
        "changeAddr":"X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8",
        "username":"myUsername",
        "password":"myPassword"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "result": {
    "txID": "2Eu16yNaepP57XrrJgjKGpiEDandpiGWW8xbUm6wcTYny3fejj",
    "changeAddr": "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8"
  },
  "id": 1
}

avm.exportKey ​

Get the private key that controls a given address. The returned private key can be added to a user with avm.importKey .

Signature:

avm.exportKey({
    username: string,
    password: string,
    address: string
}) -> {privateKey: string}

• username must control address .
• privateKey is the string representation of the private key that controls address .

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"avm.exportKey",
    "params" :{
        "username":"myUsername",
        "password":"myPassword",
        "address":"X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "privateKey": "PrivateKey-2w4XiXxPfQK4TypYqnohRL8DRNTz9cGiGmwQ1zmgEqD9c9KWLq"
  }
}

avm.getAddressTxs ​

Returns all transactions that change the balance of the given address. A transaction is said to change an address's balance if either is true:

• A UTXO that the transaction consumes was at least partially owned by the address.
• A UTXO that the transaction produces is at least partially owned by the address.

Signature:

avm.getAddressTxs({
    address: string,
    cursor: uint64,     // optional, leave empty to get the first page
    assetID: string,
    pageSize: uint64    // optional, defaults to 1024
}) -> {
    txIDs: []string,
    cursor: uint64,
}

Request Parameters:

• address : The address for which we're fetching related transactions
• assetID : Only return transactions that changed the balance of this asset. Must be an ID or an alias for an asset.
• pageSize : Number of items to return per page. Optional. Defaults to 1024.

Response Parameter:

• txIDs : List of transaction IDs that affected the balance of this address.
• cursor : Page number or offset. Use this in request to get the next page.

Example Call:

curl -X POST --data '{
  "jsonrpc":"2.0",
  "id"     : 1,
  "method" :"avm.getAddressTxs",
  "params" :{
      "address":"X-local1kpprmfpzzm5lxyene32f6lr7j0aj7gxsu6hp9y",
      "assetID":"AVAX",
      "pageSize":20
  }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "result": {
    "txIDs": ["SsJF7KKwxiUJkczygwmgLqo3XVRotmpKP8rMp74cpLuNLfwf6"],
    "cursor": "1"
  },
  "id": 1
}

avm.getAllBalances ​

Get the balances of all assets controlled by a given address.

Signature:

avm.getAllBalances({address:string}) -> {
    balances: []{
        asset: string,
        balance: int
    }
}

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     : 1,
    "method" :"avm.getAllBalances",
    "params" :{
        "address":"X-avax1c79e0dd0susp7dc8udq34jgk2yvve7hapvdyht"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "result": {
    "balances": [
      {
        "asset": "AVAX",
        "balance": "102"
      },
      {
        "asset": "2sdnziCz37Jov3QSNMXcFRGFJ1tgauaj6L7qfk7yUcRPfQMC79",
        "balance": "10000"
      }
    ]
  },
  "id": 1
}

avm.getAssetDescription ​

Get information about an asset.

Signature:

avm.getAssetDescription({assetID: string}) -> {
    assetId: string,
    name: string,
    symbol: string,
    denomination: int
}

• assetID is the id of the asset for which the information is requested.
• name is the asset’s human-readable, not necessarily unique name.
• symbol is the asset’s symbol.
• denomination determines how balances of this asset are displayed by user interfaces. If denomination is 0, 100 units of this asset are displayed as 100. If denomination is 1, 100 units of this asset are displayed as 10.0. If denomination is 2, 100 units of this asset are displays as .100, etc.

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"avm.getAssetDescription",
    "params" :{
        "assetID" :"FvwEAhmxKfeiG8SnEvq42hc6whRyY3EFYAvebMqDNDGCgxN5Z"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
    "jsonrpc": "2.0",
    "result": {
        "assetID": "FvwEAhmxKfeiG8SnEvq42hc6whRyY3EFYAvebMqDNDGCgxN5Z",
        "name": "Avalanche",
        "symbol": "AVAX",
        "denomination": "9"
    },
    "id": 1
}`

avm.getBalance ​

Get the balance of an asset controlled by a given address.

Signature:

avm.getBalance({
    address: string,
    assetID: string
}) -> {balance: int}

• address owner of the asset
• assetID id of the asset for which the balance is requested

Example Call:

curl -X POST --data '{
  "jsonrpc":"2.0",
  "id"     : 1,
  "method" :"avm.getBalance",
  "params" :{
      "address":"X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
      "assetID": "2pYGetDWyKdHxpFxh2LHeoLNCH6H5vxxCxHQtFnnFaYxLsqtHC"
  }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "balance": "299999999999900",
    "utxoIDs": [
      {
        "txID": "WPQdyLNqHfiEKp4zcCpayRHYDVYuh1hqs9c1RqgZXS4VPgdvo",
        "outputIndex": 1
      }
    ]
  }
}

avm.getBlock ​

Returns the block with the given id.

Signature:

avm.getBlock({
    blockID: string
    encoding: string // optional
}) -> {
    block: string,
    encoding: string
}

Request:

• blockID is the block ID. It should be in cb58 format.
• encoding is the encoding format to use. Can be either hex or json . Defaults to hex .

Response:

• block is the transaction encoded to encoding .
• encoding is the encoding .

Hex Example ​

Example Call:

curl -X POST --data '{
    "jsonrpc": "2.0",
    "method": "avm.getBlock",
    "params": {
        "blockID": "tXJ4xwmR8soHE6DzRNMQPtiwQvuYsHn6eLLBzo2moDqBquqy6",
        "encoding": "hex"
    },
    "id": 1
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "result": {
    "block": "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",
    "encoding": "hex"
  },
  "id": 1
}

avm.getBlockByHeight ​

Returns block at the given height.

Signature:

avm.getBlockByHeight({
    height: string
    encoding: string // optional
}) -> {
    block: string,
    encoding: string
}

Request:

• blockHeight is the block height. It should be in string format.
• encoding is the encoding format to use. Can be either hex or json . Defaults to hex .

Response:

• block is the transaction encoded to encoding .
• encoding is the encoding .

Hex Example ​

Example Call:

curl -X POST --data '{
    "jsonrpc": "2.0",
    "method": "avm.getBlockByHeight”,
    "params": {
        “height”: “275686313486”,
        "encoding": “hex”
    },
    "id": 1
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "result": {
    "block": "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",
    "encoding": "hex"
  },
  "id": 1
}

avm.getHeight ​

Returns the height of the last accepted block.

Signature:

avm.getHeight() ->
{
    height: uint64,
}

Example Call:

curl -X POST --data '{
    "jsonrpc": "2.0",
    "method": "avm.getHeight",
    "params": {},
    "id": 1
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "result": {
    "height": "5094088"
  },
  "id": 1
}

avm.getTx ​

Returns the specified transaction. The encoding parameter sets the format of the returned transaction. Can be either "hex" or "json" . Defaults to "hex" .

Signature:

avm.getTx({
    txID: string,
    encoding: string, //optional
}) -> {
    tx: string,
    encoding: string,
}

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"avm.getTx",
    "params" :{
        "txID":"2oJCbb8pfdxEHAf9A8CdN4Afj9VSR3xzyzNkf8tDv7aM1sfNFL",
        "encoding": "json"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "result": {
    "tx": {
      "unsignedTx": {
        "networkID": 1,
        "blockchainID": "2oYMBNV4eNHyqk2fjjV5nVQLDbtmNJzq5s3qs3Lo6ftnC6FByM",
        "outputs": [],
        "inputs": [
          {
            "txID": "2jbZUvi6nHy3Pgmk8xcMpSg5cW6epkPqdKkHSCweb4eRXtq4k9",
            "outputIndex": 1,
            "assetID": "FvwEAhmxKfeiG8SnEvq42hc6whRyY3EFYAvebMqDNDGCgxN5Z",
            "fxID": "spdxUxVJQbX85MGxMHbKw1sHxMnSqJ3QBzDyDYEP3h6TLuxqQ",
            "input": {
              "amount": 2570382395,
              "signatureIndices": [
                0
              ]
            }
          }
        ],
        "memo": "0x",
        "destinationChain": "11111111111111111111111111111111LpoYY",
        "exportedOutputs": [
          {
            "assetID": "FvwEAhmxKfeiG8SnEvq42hc6whRyY3EFYAvebMqDNDGCgxN5Z",
            "fxID": "spdxUxVJQbX85MGxMHbKw1sHxMnSqJ3QBzDyDYEP3h6TLuxqQ",
            "output": {
              "addresses": [
                "X-avax1tnuesf6cqwnjw7fxjyk7lhch0vhf0v95wj5jvy"
              ],
              "amount": 2569382395,
              "locktime": 0,
              "threshold": 1
            }
          }
        ]
      },
      "credentials": [
        {
          "fxID": "spdxUxVJQbX85MGxMHbKw1sHxMnSqJ3QBzDyDYEP3h6TLuxqQ",
          "credential": {
            "signatures": [
              "0x46ebcbcfbee3ece1fd15015204045cf3cb77f42c48d0201fc150341f91f086f177cfca8894ca9b4a0c55d6950218e4ea8c01d5c4aefb85cd7264b47bd57d224400"
            ]
          }
        }
      ],
      "id": "2oJCbb8pfdxEHAf9A8CdN4Afj9VSR3xzyzNkf8tDv7aM1sfNFL"
    },
    "encoding": "json"
  },
  "id": 1
}

Where:

• credentials is a list of this transaction's credentials. Each credential proves that this transaction's creator is allowed to consume one of this transaction's inputs. Each credential is a list of signatures.
• unsignedTx is the non-signature portion of the transaction.
• networkID is the ID of the network this transaction happened on. (Avalanche Mainnet is 1 .)
• blockchainID is the ID of the blockchain this transaction happened on. (Avalanche Mainnet X-Chain is 2oYMBNV4eNHyqk2fjjV5nVQLDbtmNJzq5s3qs3Lo6ftnC6FByM .)
• Each element of outputs is an output (UTXO) of this transaction that is not being exported to another chain.
• Each element of inputs is an input of this transaction which has not been imported from another chain.
• Import Transactions have additional fields sourceChain and importedInputs , which specify the blockchain ID that assets are being imported from, and the inputs that are being imported.
• Export Transactions have additional fields destinationChain and exportedOutputs , which specify the blockchain ID that assets are being exported to, and the UTXOs that are being exported.

An output contains:

• assetID : The ID of the asset being transferred. (The Mainnet Avax ID is FvwEAhmxKfeiG8SnEvq42hc6whRyY3EFYAvebMqDNDGCgxN5Z .)
• fxID : The ID of the FX this output uses.
• output : The FX-specific contents of this output.

Most outputs use the secp256k1 FX, look like this:

{
  "assetID": "FvwEAhmxKfeiG8SnEvq42hc6whRyY3EFYAvebMqDNDGCgxN5Z",
  "fxID": "spdxUxVJQbX85MGxMHbKw1sHxMnSqJ3QBzDyDYEP3h6TLuxqQ",
  "output": {
    "addresses": ["X-avax126rd3w35xwkmj8670zvf7y5r8k36qa9z9803wm"],
    "amount": 1530084210,
    "locktime": 0,
    "threshold": 1
  }
}

The above output can be consumed after Unix time locktime by a transaction that has signatures from threshold of the addresses in addresses .

avm.getTxStatus ​

Get the status of a transaction sent to the network.

Signature:

avm.getTxStatus({txID: string}) -> {status: string}

status is one of:

• Accepted : The transaction is (or will be) accepted by every node
• Processing : The transaction is being voted on by this node
• Rejected : The transaction will never be accepted by any node in the network
• Unknown : The transaction hasn’t been seen by this node

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"avm.getTxStatus",
    "params" :{
        "txID":"2QouvFWUbjuySRxeX5xMbNCuAaKWfbk5FeEa2JmoF85RKLk2dD"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "status": "Accepted"
  }
}

avm.getUTXOs ​

Gets the UTXOs that reference a given address. If sourceChain is specified, then it will retrieve the atomic UTXOs exported from that chain to the X Chain.

Signature:

avm.getUTXOs({
    addresses: []string,
    limit: int, //optional
    startIndex: { //optional
        address: string,
        utxo: string
    },
    sourceChain: string, //optional
    encoding: string //optional
}) -> {
    numFetched: int,
    utxos: []string,
    endIndex: {
        address: string,
        utxo: string
    },
    sourceChain: string, //optional
    encoding: string
}

• utxos is a list of UTXOs such that each UTXO references at least one address in addresses .
• At most limit UTXOs are returned. If limit is omitted or greater than 1024, it is set to 1024.
• This method supports pagination. endIndex denotes the last UTXO returned. To get the next set of UTXOs, use the value of endIndex as startIndex in the next call.
• If startIndex is omitted, will fetch all UTXOs up to limit .
• When using pagination (when startIndex is provided), UTXOs are not guaranteed to be unique across multiple calls. That is, a UTXO may appear in the result of the first call, and then again in the second call.
• When using pagination, consistency is not guaranteed across multiple calls. That is, the UTXO set of the addresses may have changed between calls.
• encoding sets the format for the returned UTXOs. Can only be hex when a value is provided.

Example ​

Suppose we want all UTXOs that reference at least one of X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5 and X-avax1d09qn852zcy03sfc9hay2llmn9hsgnw4tp3dv6 .

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"avm.getUTXOs",
    "params" :{
        "addresses":["X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5", "X-avax1d09qn852zcy03sfc9hay2llmn9hsgnw4tp3dv6"],
        "limit":5,
        "encoding": "hex"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

This gives response:

{
  "jsonrpc": "2.0",
  "result": {
    "numFetched": "5",
    "utxos": [
      "0x0000a195046108a85e60f7a864bb567745a37f50c6af282103e47cc62f036cee404700000000345aa98e8a990f4101e2268fab4c4e1f731c8dfbcffa3a77978686e6390d624f000000070000000000000001000000000000000000000001000000018ba98dabaebcd83056799841cfbc567d8b10f216c1f01765",
      "0x0000ae8b1b94444eed8de9a81b1222f00f1b4133330add23d8ac288bffa98b85271100000000345aa98e8a990f4101e2268fab4c4e1f731c8dfbcffa3a77978686e6390d624f000000070000000000000001000000000000000000000001000000018ba98dabaebcd83056799841cfbc567d8b10f216473d042a",
      "0x0000731ce04b1feefa9f4291d869adc30a33463f315491e164d89be7d6d2d7890cfc00000000345aa98e8a990f4101e2268fab4c4e1f731c8dfbcffa3a77978686e6390d624f000000070000000000000001000000000000000000000001000000018ba98dabaebcd83056799841cfbc567d8b10f21600dd3047",
      "0x0000b462030cc4734f24c0bc224cf0d16ee452ea6b67615517caffead123ab4fbf1500000000345aa98e8a990f4101e2268fab4c4e1f731c8dfbcffa3a77978686e6390d624f000000070000000000000001000000000000000000000001000000018ba98dabaebcd83056799841cfbc567d8b10f216c71b387e",
      "0x000054f6826c39bc957c0c6d44b70f961a994898999179cc32d21eb09c1908d7167b00000000345aa98e8a990f4101e2268fab4c4e1f731c8dfbcffa3a77978686e6390d624f000000070000000000000001000000000000000000000001000000018ba98dabaebcd83056799841cfbc567d8b10f2166290e79d"
    ],
    "endIndex": {
      "address": "X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
      "utxo": "kbUThAUfmBXUmRgTpgD6r3nLj7rJUGho6xyht5nouNNypH45j"
    },
    "encoding": "hex"
  },
  "id": 1
}

Since numFetched is the same as limit , we can tell that there may be more UTXOs that were not fetched. We call the method again, this time with startIndex :

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :2,
    "method" :"avm.getUTXOs",
    "params" :{
        "addresses":["X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5"],
        "limit":5,
        "startIndex": {
            "address": "X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
            "utxo": "kbUThAUfmBXUmRgTpgD6r3nLj7rJUGho6xyht5nouNNypH45j"
        },
        "encoding": "hex"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

This gives response:

{
  "jsonrpc": "2.0",
  "result": {
    "numFetched": "4",
    "utxos": [
      "0x000020e182dd51ee4dcd31909fddd75bb3438d9431f8e4efce86a88a684f5c7fa09300000000345aa98e8a990f4101e2268fab4c4e1f731c8dfbcffa3a77978686e6390d624f000000070000000000000001000000000000000000000001000000018ba98dabaebcd83056799841cfbc567d8b10f21662861d59",
      "0x0000a71ba36c475c18eb65dc90f6e85c4fd4a462d51c5de3ac2cbddf47db4d99284e00000000345aa98e8a990f4101e2268fab4c4e1f731c8dfbcffa3a77978686e6390d624f000000070000000000000001000000000000000000000001000000018ba98dabaebcd83056799841cfbc567d8b10f21665f6f83f",
      "0x0000925424f61cb13e0fbdecc66e1270de68de9667b85baa3fdc84741d048daa69fa00000000345aa98e8a990f4101e2268fab4c4e1f731c8dfbcffa3a77978686e6390d624f000000070000000000000001000000000000000000000001000000018ba98dabaebcd83056799841cfbc567d8b10f216afecf76a",
      "0x000082f30327514f819da6009fad92b5dba24d27db01e29ad7541aa8e6b6b554615c00000000345aa98e8a990f4101e2268fab4c4e1f731c8dfbcffa3a77978686e6390d624f000000070000000000000001000000000000000000000001000000018ba98dabaebcd83056799841cfbc567d8b10f216779c2d59"
    ],
    "endIndex": {
      "address": "X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
      "utxo": "21jG2RfqyHUUgkTLe2tUp6ETGLriSDTW3th8JXFbPRNiSZ11jK"
    },
    "encoding": "hex"
  },
  "id": 1
}

Since numFetched is less than limit , we know that we are done fetching UTXOs and don’t need to call this method again.

Suppose we want to fetch the UTXOs exported from the P Chain to the X Chain in order to build an ImportTx. Then we need to call GetUTXOs with the sourceChain argument in order to retrieve the atomic UTXOs:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"avm.getUTXOs",
    "params" :{
        "addresses":["X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5", "X-avax1d09qn852zcy03sfc9hay2llmn9hsgnw4tp3dv6"],
        "limit":5,
        "sourceChain": "P",
        "encoding": "hex"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

This gives response:

{
  "jsonrpc": "2.0",
  "result": {
    "numFetched": "1",
    "utxos": [
      "0x00001f989ffaf18a18a59bdfbf209342aa61c6a62a67e8639d02bb3c8ddab315c6fa0000000039c33a499ce4c33a3b09cdd2cfa01ae70dbf2d18b2d7d168524440e55d550088000000070011c304cd7eb5c0000000000000000000000001000000013cb7d3842e8cee6a0ebd09f1fe884f6861e1b29c83497819"
    ],
    "endIndex": {
      "address": "X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
      "utxo": "2Sz2XwRYqUHwPeiKoRnZ6ht88YqzAF1SQjMYZQQaB5wBFkAqST"
    },
    "encoding": "hex"
  },
  "id": 1
}

avm.import ​

Finalize a transfer of an asset from the P-Chain or C-Chain to the X-Chain. Before this method is called, you must call the P-Chain’s platform.exportAVAX or C-Chain’s avax.export method to initiate the transfer.

Signature:

avm.import({
    to: string,
    sourceChain: string,
    username: string,
    password: string,
}) -> {txID: string}

• to is the address the AVAX is sent to. This must be the same as the to argument in the corresponding call to the P-Chain’s exportAVAX or C-Chain's export .
• sourceChain is the ID or alias of the chain the AVAX is being imported from. To import funds from the C-Chain, use "C" .
• username is the user that controls to .
• txID is the ID of the newly created atomic transaction.

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"avm.import",
    "params" :{
        "to":"X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
        "sourceChain":"C",
        "username":"myUsername",
        "password":"myPassword"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "result": {
    "txID": "2gXpf4jFoMAWQ3rxBfavgFfSdLkL2eFUYprKsUQuEdB5H6Jo1H"
  },
  "id": 1
}

avm.importKey ​

Give a user control over an address by providing the private key that controls the address.

Signature:

avm.importKey({
    username: string,
    password: string,
    privateKey: string
}) -> {address: string}

• Add privateKey to username ‘s set of private keys. address is the address username now controls with the private key.

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"avm.importKey",
    "params" :{
        "username":"myUsername",
        "password":"myPassword",
        "privateKey":"PrivateKey-2w4XiXxPfQK4TypYqnohRL8DRNTz9cGiGmwQ1zmgEqD9c9KWLq"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "address": "X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5"
  }
}

avm.issueTx ​

Send a signed transaction to the network. encoding specifies the format of the signed transaction. Can only be hex when a value is provided.

Signature:

avm.issueTx({
    tx: string,
    encoding: string, //optional
}) -> {
    txID: string
}

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     : 1,
    "method" :"avm.issueTx",
    "params" :{
        "tx":"0x00000009de31b4d8b22991d51aa6aa1fc733f23a851a8c9400000000000186a0000000005f041280000000005f9ca900000030390000000000000001fceda8f90fcb5d30614b99d79fc4baa29307762668f16eb0259a57c2d3b78c875c86ec2045792d4df2d926c40f829196e0bb97ee697af71f5b0a966dabff749634c8b729855e937715b0e44303fd1014daedc752006011b730",
        "encoding": "hex"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "txID": "NUPLwbt2hsYxpQg4H2o451hmTWQ4JZx2zMzM4SinwtHgAdX1JLPHXvWSXEnpecStLj"
  }
}

avm.listAddresses ​

List addresses controlled by the given user.

Signature:

avm.listAddresses({
    username: string,
    password: string
}) -> {addresses: []string}

Example Call:

curl -X POST --data '{
    "jsonrpc": "2.0",
    "method": "avm.listAddresses",
    "params": {
        "username":"myUsername",
        "password":"myPassword"
    },
    "id": 1
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "result": {
    "addresses": ["X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5"]
  },
  "id": 1
}

avm.mint ​

Mint units of a variable-cap asset created with avm.createVariableCapAsset .

Signature:

avm.mint({
    amount: int,
    assetID: string,
    to: string,
    from: []string, //optional
    changeAddr: string, //optional
    username: string,
    password: string
}) ->
{
    txID: string,
    changeAddr: string,
}

• amount units of assetID will be created and controlled by address to .
• from are the addresses that you want to use for this operation. If omitted, uses any of your addresses as needed.
• changeAddr is the address any change will be sent to. If omitted, change is sent to one of the addresses controlled by the user.
• username is the user that pays the transaction fee. username must hold keys giving it permission to mint more of this asset. That is, it must control at least threshold keys for one of the minter sets.
• txID is this transaction’s ID.
• changeAddr in the result is the address where any change was sent.

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     : 1,
    "method" :"avm.mint",
    "params" :{
        "amount":10000000,
        "assetID":"i1EqsthjiFTxunrj8WD2xFSrQ5p2siEKQacmCCB5qBFVqfSL2",
        "to":"X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
        "from":["X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5"],
        "changeAddr":"X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8",
        "username":"myUsername",
        "password":"myPassword"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "txID": "2oGdPdfw2qcNUHeqjw8sU2hPVrFyNUTgn6A8HenDra7oLCDtja",
    "changeAddr": "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8"
  }
}

avm.mintNFT ​

Mint non-fungible tokens which were created with avm.createNFTAsset .

Signature:

avm.mintNFT({
    assetID: string,
    payload: string,
    to: string,
    encoding: string, //optional
    from: []string, //optional
    changeAddr: string, //optional
    username: string,
    password: string
}) ->
{
    txID: string,
    changeAddr: string,
}

• assetID is the assetID of the newly created NFT asset.
• payload is an arbitrary payload of up to 1024 bytes. Its encoding format is specified by the encoding argument.
• from are the addresses that you want to use for this operation. If omitted, uses any of your addresses as needed.
• changeAddr is the address any change will be sent to. If omitted, change is sent to one of the addresses controlled by the user.
• username is the user that pays the transaction fee. username must hold keys giving it permission to mint more of this asset. That is, it must control at least threshold keys for one of the minter sets.
• txID is this transaction’s ID.
• changeAddr in the result is the address where any change was sent.
• encoding is the encoding format to use for the payload argument. Can only be hex when a value is provided.

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     : 1,
    "method" :"avm.mintNFT",
    "params" :{
        "assetID":"2KGdt2HpFKpTH5CtGZjYt5XPWs6Pv9DLoRBhiFfntbezdRvZWP",
        "payload":"0x415641204c61627338259aed",
        "to":"X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
        "from":["X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5"],
        "changeAddr":"X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8",
        "username":"myUsername",
        "password":"myPassword"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "txID": "2oGdPdfw2qcNUHeqjw8sU2hPVrFyNUTgn6A8HenDra7oLCDtja",
    "changeAddr": "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8"
  }
}

avm.send ​

Send a quantity of an asset to an address.

Signature:

avm.send({
    amount: int,
    assetID: string,
    to: string,
    memo: string, //optional
    from: []string, //optional
    changeAddr: string, //optional
    username: string,
    password: string
}) -> {txID: string, changeAddr: string}

• Sends amount units of asset with ID assetID to address to . amount is denominated in the smallest increment of the asset. For AVAX this is 1 nAVAX (one billionth of 1 AVAX.)
• to is the X-Chain address the asset is sent to.
• from are the addresses that you want to use for this operation. If omitted, uses any of your addresses as needed.
• changeAddr is the address any change will be sent to. If omitted, change is sent to one of the addresses controlled by the user.
• You can attach a memo , whose length can be up to 256 bytes.
• The asset is sent from addresses controlled by user username . (Of course, that user will need to hold at least the balance of the asset being sent.)

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"avm.send",
    "params" :{
        "assetID"   : "AVAX",
        "amount"    : 10000,
        "to"        : "X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
        "from"      : ["X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5"],
        "changeAddr": "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8",
        "memo"      : "hi, mom!",
        "username"  : "userThatControlsAtLeast10000OfThisAsset",
        "password"  : "myPassword"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "txID": "2iXSVLPNVdnFqn65rRvLrsu8WneTFqBJRMqkBJx5vZTwAQb8c1",
    "changeAddr": "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8"
  }
}

avm.sendMultiple ​

Sends multiple transfers of amount of assetID , to a specified address from a list of owned addresses.

Signature:

avm.sendMultiple({
    outputs: []{
      assetID: string,
      amount: int,
      to: string
    },
    from: []string, //optional
    changeAddr: string, //optional
    memo: string, //optional
    username: string,
    password: string
}) -> {txID: string, changeAddr: string}

• outputs is an array of object literals which each contain an assetID , amount and to .
• memo is an optional message, whose length can be up to 256 bytes.
• from are the addresses that you want to use for this operation. If omitted, uses any of your addresses as needed.
• changeAddr is the address any change will be sent to. If omitted, change is sent to one of the addresses controlled by the user.
• The asset is sent from addresses controlled by user username . (Of course, that user will need to hold at least the balance of the asset being sent.)

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"avm.sendMultiple",
    "params" :{
        "outputs": [
            {
                "assetID" : "AVAX",
                "to"      : "X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
                "amount"  : 1000000000
            },
            {
                "assetID" : "26aqSTpZuWDAVtRmo44fjCx4zW6PDEx3zy9Qtp2ts1MuMFn9FB",
                "to"      : "X-avax18knvhxx8uhc0mwlgrfyzjcm2wrd6e60w37xrjq",
                "amount"  : 10
            }
        ],
        "memo"      : "hi, mom!",
        "from"      : ["X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5"],
        "changeAddr": "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8",
        "username"  : "username",
        "password"  : "myPassword"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "txID": "2iXSVLPNVdnFqn65rRvLrsu8WneTFqBJRMqkBJx5vZTwAQb8c1",
    "changeAddr": "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8"
  }
}

avm.sendNFT ​

Send a non-fungible token.

Signature:

avm.sendNFT({
    assetID: string,
    groupID: number,
    to: string,
    from: []string, //optional
    changeAddr: string, //optional
    username: string,
    password: string
}) -> {txID: string}

• assetID is the asset ID of the NFT being sent.
• groupID is the NFT group from which to send the NFT. NFT creation allows multiple groups under each NFT ID. You can issue multiple NFTs to each group.
• to is the X-Chain address the NFT is sent to.
• from are the addresses that you want to use for this operation. If omitted, uses any of your addresses as needed. changeAddr is the address any change will be sent to. If omitted, change is sent to one of the addresses controlled by the user.
• The asset is sent from addresses controlled by user username . (Of course, that user will need to hold at least the balance of the NFT being sent.)

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"avm.sendNFT",
    "params" :{
        "assetID"   : "2KGdt2HpFKpTH5CtGZjYt5XPWs6Pv9DLoRBhiFfntbezdRvZWP",
        "groupID"   : 0,
        "to"        : "X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
        "from"      : ["X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5"],
        "changeAddr": "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8",
        "username"  : "myUsername",
        "password"  : "myPassword"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X

Example Response:

{
  "jsonrpc": "2.0",
  "result": {
    "txID": "DoR2UtG1Trd3Q8gWXVevNxD666Q3DPqSFmBSMPQ9dWTV8Qtuy",
    "changeAddr": "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8"
  },
  "id": 1
}

wallet.issueTx ​

Send a signed transaction to the network and assume the TX will be accepted. encoding specifies the format of the signed transaction. Can only be hex when a value is provided.

This call is made to the wallet API endpoint:

/ext/bc/X/wallet

Signature:

wallet.issueTx({
    tx: string,
    encoding: string, //optional
}) -> {
    txID: string
}

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     : 1,
    "method" :"wallet.issueTx",
    "params" :{
        "tx":"0x00000009de31b4d8b22991d51aa6aa1fc733f23a851a8c9400000000000186a0000000005f041280000000005f9ca900000030390000000000000001fceda8f90fcb5d30614b99d79fc4baa29307762668f16eb0259a57c2d3b78c875c86ec2045792d4df2d926c40f829196e0bb97ee697af71f5b0a966dabff749634c8b729855e937715b0e44303fd1014daedc752006011b730",
        "encoding": "hex"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X/wallet

Example Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "txID": "NUPLwbt2hsYxpQg4H2o451hmTWQ4JZx2zMzM4SinwtHgAdX1JLPHXvWSXEnpecStLj"
  }
}

wallet.send ​

Send a quantity of an asset to an address and assume the TX will be accepted so that future calls can use the modified UTXO set.

This call is made to the wallet API endpoint:

/ext/bc/X/wallet

Signature:

wallet.send({
    amount: int,
    assetID: string,
    to: string,
    memo: string, //optional
    from: []string, //optional
    changeAddr: string, //optional
    username: string,
    password: string
}) -> {txID: string, changeAddr: string}

• Sends amount units of asset with ID assetID to address to . amount is denominated in the smallest increment of the asset. For AVAX this is 1 nAVAX (one billionth of 1 AVAX.)
• to is the X-Chain address the asset is sent to.
• from are the addresses that you want to use for this operation. If omitted, uses any of your addresses as needed.
• changeAddr is the address any change will be sent to. If omitted, change is sent to one of the addresses controlled by the user.
• You can attach a memo , whose length can be up to 256 bytes.
• The asset is sent from addresses controlled by user username . (Of course, that user will need to hold at least the balance of the asset being sent.)

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"wallet.send",
    "params" :{
        "assetID"   : "AVAX",
        "amount"    : 10000,
        "to"        : "X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
        "memo"      : "hi, mom!",
        "from"      : ["X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5"],
        "changeAddr": "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8",
        "username"  : "userThatControlsAtLeast10000OfThisAsset",
        "password"  : "myPassword"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X/wallet

Example Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "txID": "2iXSVLPNVdnFqn65rRvLrsu8WneTFqBJRMqkBJx5vZTwAQb8c1",
    "changeAddr": "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8"
  }
}

wallet.sendMultiple ​

Send multiple transfers of amount of assetID , to a specified address from a list of owned of addresses and assume the TX will be accepted so that future calls can use the modified UTXO set.

This call is made to the wallet API endpoint:

/ext/bc/X/wallet

Signature:

wallet.sendMultiple({
    outputs: []{
      assetID: string,
      amount: int,
      to: string
    },
    from: []string, //optional
    changeAddr: string, //optional
    memo: string, //optional
    username: string,
    password: string
}) -> {txID: string, changeAddr: string}

• outputs is an array of object literals which each contain an assetID , amount and to .
• from are the addresses that you want to use for this operation. If omitted, uses any of your addresses as needed.
• changeAddr is the address any change will be sent to. If omitted, change is sent to one of the addresses controlled by the user.
• You can attach a memo , whose length can be up to 256 bytes.
• The asset is sent from addresses controlled by user username . (Of course, that user will need to hold at least the balance of the asset being sent.)

Example Call:

curl -X POST --data '{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"wallet.sendMultiple",
    "params" :{
        "outputs": [
            {
                "assetID" : "AVAX",
                "to"      : "X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5",
                "amount"  : 1000000000
            },
            {
                "assetID" : "26aqSTpZuWDAVtRmo44fjCx4zW6PDEx3zy9Qtp2ts1MuMFn9FB",
                "to"      : "X-avax18knvhxx8uhc0mwlgrfyzjcm2wrd6e60w37xrjq",
                "amount"  : 10
            }
        ],
        "memo"      : "hi, mom!",
        "from"      : ["X-avax18jma8ppw3nhx5r4ap8clazz0dps7rv5ukulre5"],
        "changeAddr": "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8",
        "username"  : "username",
        "password"  : "myPassword"
    }
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/X/wallet

Example Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "txID": "2iXSVLPNVdnFqn65rRvLrsu8WneTFqBJRMqkBJx5vZTwAQb8c1",
    "changeAddr": "X-avax1turszjwn05lflpewurw96rfrd3h6x8flgs5uf8"
  }
}

Events ​

Listen for transactions on a specified address.

This call is made to the events API endpoint:

/ext/bc/X/events

Golang Example ​

package main

import (
    "encoding/json"
    "log"
    "net"
    "net/http"
    "sync"

    "github.com/ava-labs/avalanchego/api"
    "github.com/ava-labs/avalanchego/pubsub"
    "github.com/gorilla/websocket"
)

func main() {
    dialer := websocket.Dialer{
        NetDial: func(netw, addr string) (net.Conn, error) {
            return net.Dial(netw, addr)
        },
    }

    httpHeader := http.Header{}
    conn, _, err := dialer.Dial("ws://localhost:9650/ext/bc/X/events", httpHeader)
    if err != nil {
        panic(err)
    }

    waitGroup := &sync.WaitGroup{}
    waitGroup.Add(1)

    readMsg := func() {
        defer waitGroup.Done()

        for {
            mt, msg, err := conn.ReadMessage()
            if err != nil {
                log.Println(err)
                return
            }
            switch mt {
            case websocket.TextMessage:
                log.Println(string(msg))
            default:
                log.Println(mt, string(msg))
            }
        }
    }

    go readMsg()

    cmd := &pubsub.Command{NewSet: &pubsub.NewSet{}}
    cmdmsg, err := json.Marshal(cmd)
    if err != nil {
        panic(err)
    }
    err = conn.WriteMessage(websocket.TextMessage, cmdmsg)
    if err != nil {
        panic(err)
    }

    var addresses []string
    addresses = append(addresses, " X-fuji....")
    cmd = &pubsub.Command{AddAddresses: &pubsub.AddAddresses{JSONAddresses: api.JSONAddresses{Addresses: addresses}}}
    cmdmsg, err = json.Marshal(cmd)
    if err != nil {
        panic(err)
    }

    err = conn.WriteMessage(websocket.TextMessage, cmdmsg)
    if err != nil {
        panic(err)
    }

    waitGroup.Wait()
}