Provider API#

What is injected provider API?#

The OKX Injected Providers API is based on a JavaScript model and is embedded by OKX into the websites users access. DApps projects can utilize this API to request user account information, retrieve data from the connected blockchain, and assist users in signing messages and transactions.

connect#

okxwallet.bitcoin.connect()

Description

Connect wallet

Parameters

None

Return value

• Promise - object
  • address - string: address of current account
  • publicKey - string: public key of current account

Example

const result = await okxwallet.bitcoin.connect()
// example
{
  address: 'bc1pwqye6x35g2n6xpwalywhpsvsu39k3l6086cvdgqazlw9mz2meansz9knaq',
  publicKey: '4a627f388196639041ce226c0229560127ef9a5a39d4885123cd82dc82d8b497'
}

requestAccounts#

Description

okxwallet.bitcoin.requestAccounts()

Connect the current account

Parameters

None

Return value

• Promise - string[]: address of current account

Example

try {
  let accounts = await okxwallet.bitcoin.requestAccounts();
  console.log('connect success', accounts);
} catch (e) {
  console.log('connect failed');
}
// example
['tb1qrn7tvhdf6wnh790384ahj56u0xaa0kqgautnnz'];

getAccounts#

okxwallet.bitcoin.getAccounts()

Description

Get the address of current account

Parameters

None

Return value

• Promise - string[]: address of current account

Example

try {
  let res = await okxwallet.bitcoin.getAccounts();
  console.log(res);
} catch (e) {
  console.log(e);
}
// example
['tb1qrn7tvhdf6wnh790384ahj56u0xaa0kqgautnnz'];

getNetwork#

okxwallet.bitcoin.getNetwork()

Description

Get network

Parameters

None

Return value

• Promise - string: the network

Example

try {
  let res = await okxwallet.bitcoin.getNetwork();
  console.log(res);
} catch (e) {
  console.log(e);
}
// example
livenet;

getPublicKey#

okxwallet.bitcoin.getPublicKey()

Description

Get the public key of current account

Parameters

None

Return value

• Promise - string: public key

Example

try {
  let res = await okxwallet.bitcoin.getPublicKey();
  console.log(res)
} catch (e) {
  console.log(e);
}
// example
03cbaedc26f03fd3ba02fc936f338e980c9e2172c5e23128877ed46827e935296f

getBalance#

okxwallet.bitcoin.getBalance()

Description

Get BTC balance

Parameters

None

Return value

• Promise - object
  • confirmed - number: the confirmed satoshis
  • unconfirmed - number: the unconfirmed satoshis
  • total - number: the total satoshis

Example

try {
  let res = await okxwallet.bitcoin.getBalance();
  console.log(res)
} catch (e) {
  console.log(e);
}
// example
{
  "confirmed":0,
  "unconfirmed":100000,
  "total":100000
}

getInscriptions#

okxwallet.bitcoin.getInscriptions()

Description

List inscriptions of current account

Parameters

• cursor - number: (optional) offset, starting from 0. The default value is 0.
• size - number: (optional) number per page. The default value is 20.

Return value

• Promise - object
  • total - number: the total count
  • list - object[]:
    • inscriptionId - string: the ID of inscription
    • inscriptionNumber - string: the number of inscription
    • address - string: the address of inscription
    • outputValue - string: the output value of inscription
    • contentLength - string: the content length of inscription
    • contentType - number: the content type of the inscription
    • timestamp - number: the block time of the inscription
    • offset - number: the offset of inscription
    • output - string: the identification of the utxo where the current inscription is located
    • genesisTransaction - string: the transaction ID of the genesis transaction
    • location - string: the txid and vout of current location

Example

try {
  let res = await okxwallet.bitcoin.getInscriptions(0, 20);
  console.log(res)
} catch (e) {
  console.log(e);
}
// example
{
  "total":10,
  "list":[
    {
      inscriptionId: '6037b17df2f48cf87f6b6e6ff89af416f6f21dd3d3bc9f1832fb1ff560037531i0',
      inscriptionNumber: 55878989,
      address: 'bc1q8h8s4zd9y0lkrx334aqnj4ykqs220ss735a3gh',
      outputValue: 546,
      contentLength: 53,
      contentType: 'text/plain',
      timestamp: 1705406294,
      location: '6037b17df2f48cf87f6b6e6ff89af416f6f21dd3d3bc9f1832fb1ff560037531:0:0',
      output: '6037b17df2f48cf87f6b6e6ff89af416f6f21dd3d3bc9f1832fb1ff560037531:0',
      offset: 0,
      genesisTransaction: '02c9eae52923fdb21fe16ee9eb873c7d66fe412a61b75147451d8a47d089def4'
    }
  ]
}

sendBitcoin#

okxwallet.bitcoin.sendBitcoin(toAddress, satoshis, options)

Description

Send BTC

Parameters

• toAddress - string: the address to send
• satoshis - number: the satoshis to send
• options - object: (optional)
  • feeRate - number: the network fee rate

Return value

• Promise - string: transaction hash

Example

try {
  let txid = await okxwallet.bitcoin.sendBitcoin(
    'tb1qrn7tvhdf6wnh790384ahj56u0xaa0kqgautnnz',
    1000
  );
  console.log(txid);
} catch (e) {
  console.log(e);
}

send#

okxwallet.bitcoin.send({ from, to, value, satBytes })

Description

Send BTC (supports memo parameter)

Parameters

• from - string: the BTC address of the currently connected wallet
• to - string: addresses that accept BTC
• value - string: amount of BTC sent
• satBytes - string (optional): custom rate
• memo - string: (optional) specify the content of outputs OP_RETURN. Example
• memoPos - number: (optional) specify the output position of outputs OP_RETURN. If a memo is provided, the memoPos must be specified, otherwise the memo will not take effect.

Return value

• Promise - object
  • txhash: transaction hash

Example

const result = await window.okxwallet.bitcoin.send({
  from: 'bc1p4k9ghlrynzuum080a4zk6e2my8kjzfhptr5747afzrn7xmmdtj6sgrhd0m',
  to: 'bc1plklsxq4wtv44dv8nm49fj0gh0zm9zxewm6ayzahrxc8yqtennc2s9udmcd',
  value: '0.000012',
});

// example
{
  txhash: 'd153136cd74512b69d24c68b2d2c715c3629e607540c3f6cd3acc1140ca9bf57';
}

sendInscription#

okxwallet.bitcoin.sendInscription(address, inscriptionId, options)

Description

Send inscription

Parameters

• address - string: the receiver address

• inscriptionId - string: Inscriptions ID + protocol, default is Ordinals NFT if no transmission protocol, currently only support Ordinals and Atomicals Association

  Protocol	Description
  Ordinals	Ordinals Protocol
  Atomicals	Atomicals Protocol

• options - object: (optional)

  • feeRate - number: the network fee rate

Return value

• Promise - string: transaction hash

Example

// send Ordinals NFT
try {
  let txid = await okxwallet.bitcoin.sendInscription(
    'tb1q8h8s4zd9y0lkrx334aqnj4ykqs220ss7mjxzny',
    'e9b86a063d78cc8a1ed17d291703bcc95bcd521e087ab0c7f1621c9c607def1ai0',
    { feeRate: 15 }
  );
  console.log(
    'send Ordinal NFT to tb1q8h8s4zd9y0lkrx334aqnj4ykqs220ss7mjxzny',
    { txid }
  );
} catch (e) {
  console.log(e);
}

// send Atomicals NFT
try {
  let txid = await okxwallet.bitcoin.sendInscription(
    'tb1q8h8s4zd9y0lkrx334aqnj4ykqs220ss7mjxzny',
    'ab12349dca49643fcc55c8e6a685ad0481047139c5b1af5af85387973fc7ceafi0-Atomicals',
    { feeRate: 15 }
  );
  console.log(
    'send Atomicals NFT to tb1q8h8s4zd9y0lkrx334aqnj4ykqs220ss7mjxzny',
    { txid }
  );
} catch (e) {
  console.log(e);
}

transferNft#

okxwallet.bitcoin.transferNft({ from, to, data })

Description

Send inscription

Parameters

• from - string: the BTC address of the currently connected wallet

• to - string: addresses that accept NFTs or BRC-20 tokens

• data-string | string[]: indicates the sent NFT tokenId + protocol. If the NFT is an array, multiple NFT are transferred in batches. If no transmission protocol is used, the default NFT is Ordinals NFT. Currently, only Ordinals and Atomicals are supported

  Protocol	Description
  Ordinals	Ordinals Protocol
  Atomicals	Atomicals Protocol

Return value

• Promise - object
  • txhash - string: transaction hash

Example

// send Ordinals NFT
try {
  let res = await window.okxwallet.bitcoin.transferNft({
    from: 'bc1p8qfrmxdlmynr076uu28vlszxavwujwe7dus0r8y9thrnp5lgfh6qu2ctrr',
    to: 'bc1p8qfrmxdlmynr076uu28vlszxavwujwe7dus0r8y9thrnp5lgfh6qu2ctrr',
    data: [
      '2f285ba4c457c98c35dcb008114b96cee7c957f00a6993690efb231f91ccc2d9i0-Ordinals',
      '2f2532f59d6e46931bc84e496cc6b45f87966b149b85ed3199265cb845550d58i0-Ordinals',
    ],
  });
  console.log(res);
} catch (e) {
  console.log(e);
}
// example
{
  txhash: 'df409c3ce3c4d7d840b681fab8a3a5b8e32b1600636cc5409d84d2c06365a5fc';
}

// send Atomicals NFT
try {
  let res = await window.okxwallet.bitcoin.transferNft({
    from: 'bc1p8qfrmxdlmynr076uu28vlszxavwujwe7dus0r8y9thrnp5lgfh6qu2ctrr',
    to: 'bc1p8qfrmxdlmynr076uu28vlszxavwujwe7dus0r8y9thrnp5lgfh6qu2ctrr',
    data: [
      'ab12349dca49643fcc55c8e6a685ad0481047139c5b1af5af85387973fc7ceafi0-Atomicals',
    ],
  });
  console.log(res);
} catch (e) {
  console.log(e);
}
// example
{
  txhash: 'df409c3ce3c4d7d840b681fab8a3a5b8e32b1600636cc5409d84d2c06365a5fc';
}

signMessage#

okxwallet.bitcoin.signMessage(signStr[, type])

Description

Sign message

Parameters

• signStr - string: requires signed data
• type - string: (optional) "ecdsa" | "bip322-simple". The default value is "ecdsa". (Note: For app versions below 6.51.0, only “ecdsa” is available. For app versions equal to or above 6.51.0, all parameter types are available.)

Return value

• Promise - string: the signing result

Example

const signStr = 'need sign string';
const result = await window.okxwallet.bitcoin.signMessage(signStr, 'ecdsa')
// example
INg2ZeG8b6GsiYLiWeQQpvmfFHqCt3zC6ocdlN9ZRQLhSFZdGhgYWF8ipar1wqJtYufxzSYiZm5kdlAcnxgZWQU=

pushTx#

okxwallet.bitcoin.pushTx(rawTx)

Description

Push transaction

Parameters

• rawTx - string: rawtx to push

Return value

• Promise - string: transaction hash

Example

try {
  let txid = await okxwallet.bitcoin.pushTx('0200000000010135bd7d...');
  console.log(txid);
} catch (e) {
  console.log(e);
}

splitUtxo#

okxwallet.bitcoin.splitUtxo({ from, amount })

Description

Spliting UTXO and initializing OKX Wallet

Splitting is required by the signature algorithm

Parameters

• object
  • from - string: the BTC address of the currently connected wallet
  • amount - number: (optional) the amount of splits. The default value is 2.

Return value

• Promise - {utxos: array}: UTXOs and signatures

Example

try {
  let { utxos } = await window.okxwallet.bitcoin.splitUtxo({
    from: 'bc1pkrym02ck30phct287l0rktjjjnapavkl2qhsy78aeeeuk3qaaulqh90v6s',
  });
  console.log(utxos);
} catch (e) {
  console.log(e);
}
// example
{
  utxos: [
    {
      txId: '1e0f92720ef34ab75eefc5d691b551fb2f783eac61503a69cdf63eb7305d2306',
      vOut: 0,
      amount: 546,
      rawTransaction: 'xxxx',
    },
    {
      txId: '1e0f92720ef34ab75eefc5d691b551fb2f783eac61503a69cdf63eb7305d2306',
      vOut: 1,
      amount: 546,
      rawTransaction: 'xxxx',
    },
  ];
}

inscribe#

okxwallet.bitcoin.inscribe({ type, from, tick, tid })

Description

Inscribe transferable BRC-20

Parameters

• type - number: transaction types. Details are shown in the table below.

  Type	Description
  51	Default value. Inscription of a BRC-20 transfer

• from - string: the BTC address of the currently connected wallet

• tick - string: BRC-20 token name (from on-chain)

Return value

• Promise - string: transaction hash that reveals the transaction

Example

try {
  let txid = await okxwallet.bitcoin.inscribe({
    from: 'bc1pkrym02ck30phct287l0rktjjjnapavkl2qhsy78aeeeuk3qaaulqh90v6s',
    tick: 'ordi',
  });
  console.log(txid);
} catch (e) {
  console.log(e);
}

mint#

okxwallet.bitcoin.mint({ type, from, inscriptions })

Description

Universal inscriptions that support the Ordinal protocol

This method supports batch inscribing

Parameters

• type - number: the type of inscribed transaction to be sent. Please refer to the table below for details.

  Type	Description
  60	BRC-20 deploy inscription
  50	BRC-20 mint inscription
  51	BRC-20 transfer inscription
  62	Image inscription. The image needs to be converted into a hexadecimal string representation of the image byte stream.
  61	Plain text

• from - string: the BTC address of the currently connected wallet

• inscriptions - object[]: the array of inscriptions where each array item is an object type with its respective fields and meanings as shown in the table below:

  Field	Type	Default	Description
  contentType	string	"text/plain;charset=utf-8"	The type of content to be inscribed, represented by a MIME type value. As for the Ordinals protocol specifications, please refer to: https://docs.ordinals.com/inscriptions.html for details.
  body	string	No	The content being inscribed

  the contentType and body parameters passed in for different inscription types:

  Inscription Type	Content Type	Body
  image inscription	eg. "image/png", "image/jpeg"	The image needs to be converted into a hexadecimal string representation of the image byte stream
  BRC-20	"text/plain;charset=utf-8"	Simply convert it to a string using JSON.stringify
  plain text	"text/plain;charset=utf-8"	Directly pass in plain text

Return value

• Promise - object: tts fields and their meanings are shown below:
  • commitTx - string: the hash value of the commit transaction during inscription
  • revealTxs - string[]: the hash value of the reveal transaction during inscription. For batch inscriptions, it corresponds to the hash value of each reveal transaction separately.
  • commitTxFee - number: the network fee spent on the commit transaction
  • revealTxFees - number[]: the network fee spent on the reveal transaction. If it's a batch inscription, it corresponds to the network fee of each reveal transaction separately.
  • commitAddrs - string[]: the "to" address of the commit transaction, i.e., the delegate address
  • feeRate - number: network fee rate
  • size - number: the size of the inscription

Example

okxwallet.bitcoin.mint({
    type: 61,
    from: 'bc1p4k9ghlrynzuum080a4zk6e2my8kjzfhptr5747afzrn7xmmdtj6sgrhd0m',
    inscriptions: [{
        contentType: 'text/plain;charset=utf-8',
        body: 'hello'
    }, {
        contentType: 'text/plain;charset=utf-8',
        body: 'world'
    }]
})

// response
{
    "commitAddrs": [
        "bc1p9trqtf68gfeq3f3hlktaapp0eapufh02ly8dr6swfwffflvncncqwvtuen",
        "bc1p5ttl7q2mpvfhjq3wqffka4c05sv5jcfphcl5qeuj0pmsx7evfhcqhm60rk"
    ],
    "commitTx": "453e126346bbaaef0aaaa208acd3426cd14a39f825bd76cb8d9892957e2a5bda",
    "revealTxs": [
        "526ff04e4ba34617ee28826412bdc8e22484890635320f880c5ec50f10d6b189",
        "0f65f79456a59b3e0cd4ef00e279d0d6da57582e114eafbada95b51759a845b2"
    ],
    "commitTxFee": 1379,
    "revealTxFees": [
        973,
        973
    ],
    feeRate: 80,
    size: 546,
}

signPsbt#

okxwallet.bitcoin.signPsbt(psbtHex[, options])

Description

Signing psbt: this will traverse all inputs that match the current address to sign.

Parameters

• psbtHex - string: hexadecimal string representation of the partially signed bitcoin transaction (PSBT) that needs to be signed.

const txInputs: utxoInput[] = [];
txInputs.push({
      txId: "1e0f92720ef34ab75eefc5d691b551fb2f783eac61503a69cdf63eb7305d2306",
      vOut: 2,
      amount: 341474,
      address: "tb1q8h8....mjxzny",
      privateKey: "0s79......ldjejke",
      publicKey: "tb1q8h8....mjxzny",
      bip32Derivation: [
          {
              "masterFingerprint": "a22e8e32",
              "pubkey": "tb1q8h8....mjxzny",
              "path": "m/49'/0'/0'/0/0",
          },
      ],
  });

• options
  • autoFinalized - boolean: whether to finalize psbt after signing — the default is true
  • toSignInputs - array:
    • index - number: which input to sign
    • address - string: (at least specify either an address or a public key) which corresponding private key to use for signing
    • publicKey - string: (at least specify either an address or a public key) which corresponding private key to use for signing
    • sighashTypes - number[]: (optional) sighashTypes
    • disableTweakSigner - boolean :(optional) when signing and unlocking Taproot addresses, the tweakSigner is used by default for signature generation. Enabling this allows for signing with the original private key.

Return value

• Promise - string: the hex string of the signed psbt

Example

try {
  let res = await okxwallet.bitcoin.signPsbt('70736274ff01007d....', {
    autoFinalized: false,
    toSignInputs: [
      {
        index: 0,
        address: 'tb1q8h8....mjxzny',
      },
      {
        index: 1,
        publicKey: 'tb1q8h8....mjxzny',
        sighashTypes: [1],
      },
      {
        index: 2,
        publicKey: '02062...8779693f',
      },
    ],
  });
  console.log(res);
} catch (e) {
  console.log(e);
}

okxwallet.bitcoin.signPsbt('xxxxxxxx', {
  toSignInputs: [{ index: 0, publicKey: 'xxxxxx', disableTweakSigner: true }],
  autoFinalized: false,
});

signPsbts#

okxwallet.bitcoin.signPsbts(psbtHexs[, options])

Description

Signing psbts: this will traverse all inputs that match the current address to sign.

Parameters

• psbtHexs - string[]: the hex strings of psbts to sign

const txInputs: utxoInput[] = [];
txInputs.push({
      txId: "1e0f92720ef34ab75eefc5d691b551fb2f783eac61503a69cdf63eb7305d2306",
      vOut: 2,
      amount: 341474,
      address: "tb1q8h8....mjxzny",
      privateKey: "0s79......ldjejke",
      publicKey: "tb1q8h8....mjxzny",
      bip32Derivation: [
          {
              "masterFingerprint": "a22e8e32",
              "pubkey": "tb1q8h8....mjxzny",
              "path": "m/49'/0'/0'/0/0",
          },
      ],
  });

• options - object[]: the options of signing psbts
  • autoFinalized - boolean: whether to finalize psbts after signing — the default is true
  • toSignInputs - array:
    • index - number: which input to sign
    • address - string: (at least specify either an address or a public key) which corresponding private key to use for signing
    • publicKey - string: (at least specify either an address or a public key) which corresponding private key to use for signing
    • sighashTypes - number[]: (optional) sighashTypes

Return value

• Promise - string[]: the hex strings of the signed psbts

Example

try {
  let res = await okxwallet.bitcoin.signPsbts([
    '70736274ff01007d...',
    '70736274ff01007d...',
  ]);
  console.log(res);
} catch (e) {
  console.log(e);
}

pushPsbt#

okxwallet.bitcoin.pushPsbt(psbtHex)

Description

Push psbt transaction

Parameters

• psbtHex - string: the hex string of psbt to push

Return value

• Promise - string: transaction hash

Example

try {
  let res = await okxwallet.bitcoin.pushPsbt('70736274ff01007d....');
  console.log(res);
} catch (e) {
  console.log(e);
}

sendPsbt#

okxwallet.bitcoin.sendPsbt(txs, from)

Description

Push psbt transaction

Parameters

• txs - array: tx of psbts to publish
• from - string: the BTC address of the currently connected wallet

Return value

• Promise - array: transaction hash

Example

okxwallet.bitcoin.sendPsbt(
  [
    {
      itemId: 'xxxxx0', //Batch unique identification, no duplicates within multiple transactions
      signedTx: '70736274ff01007d....', //  Signature string
      type: 52, // BRC-20 52 or NFT 20
      extJson: {
        //Split utxo transactions, not transmitted
        // NFTID
        inscription:
          '885441055c7bb5d1c54863e33f5c3a06e5a14cc4749cb61a9b3ff1dbe52a5bbbi0',
      },
    },
    {
      itemId: 'xxxxx1', //Batch unique identifier
      signedTx: '70736274ff01007d....', //  Signature string or PSBT to be linked
      type: 52, // BRC-20 52 or NFT 20
      dependItemId: ['xxxxx0 '], //The dependent transaction itemId. If there is no dependency, this field may not be passed
      extJson: {
        // NFTID
        inscription:
          '885441055c7bb5d1c54863e33f5c3a06e5a14cc4749cb61a9b3ff1dbe52a5bbbi0',
      },
    },
  ],
  from
)[
  // response
  ({ xxxxx0: 'txId1' }, { xxxxx1: 'txId2' }) //Failure txId returns null
];

accountChanged#

Description

OKX Wallet allows you to seamlessly manage multiple accounts from a single extension or mobile application. Whenever you switch accounts, OKX Wallet will send an accountChanged event.

If you switch accounts while still connected to the application, and if the new account has placed the application on the allowlist, you will remain connected and OKX Wallet will pass the public key of the new account:

Usage

window.okxwallet.bitcoin.on('accountChanged', (addressInfo) => {
  console.log(addressInfo);
  // example
  {
    "address": "bc1pwqye6x35g2n6xpwalywhpsvsu39k3l6086cvdgqazlw9mz2meansz9knaq",
    "publicKey": "4a627f388196639041ce226c0229560127ef9a5a39d4885123cd82dc82d8b497",
    "compressedPublicKey": "034a627f388196639041ce226c0229560127ef9a5a39d4885123cd82dc82d8b497"
  }
});

accountsChanged#

Description

The accountsChanged will be emitted whenever the user's exposed account address changes.

Usage

window.okxwallet.bitcoin.on('accountsChanged', (accounts) => {
  console.log(accounts)[
    // example
    'tb1qrn7tvhdf6wnh790384ahj56u0xaa0kqgautnnz'
  ];
});