ASI Alliance Wallet API

This comprehensive resource serves as a detailed reference guide for the ASI Alliance Wallet APIs, providing developers with the essential information to integrate and interact with the ASI Browser Wallet in their decentralized applications (dApps).

This resource covers a wide range of API endpoints, including wallet detection, status checks, network management, account operations, and more. Each API is thoroughly explained with its purpose, parameters, return values, and potential error scenarios. To enhance understanding and facilitate implementation, the document includes practical code snippets and example responses for each API call. This reference is designed to empower developers to leverage the full capabilities of the ASI Alliance Wallet in their blockchain projects, ensuring seamless integration and optimal user experience.

To fully leverage the wallet APIs and ensure direct interaction between the wallet and your dApp, please refer to our example integration app (opens in a new tab).

Detect ASI Alliance Browser Wallet

You can determine whether ASI Alliance Wallet is installed on the user's device by checking window.fetchBrowserWallet.

If window.fetchBrowserWallet returns undefined after the document loads, then the ASI Alliance Browser Wallet is not installed.

There are several ways to wait for the load event to check this. We recommend tracking the document's ready state through an event listener.


async getFetchBrowserWallet(): Promise<FetchBrowserWallet | undefined> {
    if (window.fetchBrowserWallet) {
        return window.fetchBrowserWallet;
    }
 
    if (document.readyState === "complete") {
        return window.fetchBrowserWallet;
    }
 
    return new Promise((resolve) => {
        const documentStateChange = (event: Event) => {
            if (
                event.target &&
                (event.target as Document).readyState === "complete"
            ) {
                resolve(window.fetchBrowserWallet);
                document.removeEventListener("readystatechange", documentStateChange);
            }
        };
 
        document.addEventListener("readystatechange", documentStateChange);
    });
}

Using with Typescript

The @fetchai/wallet-types package has the type definition related to ASI Alliance Browser Wallet.

If you're using TypeScript, run npm install --save-dev @fetchai/wallet-types or yarn add -D @fetchai/wallet-types to install @fetchai/wallet-types.

Then, you can add the @fetchai/wallet-types window to a global window object and register the ASI Alliance Browser Wallet related types.

window.d.ts
import { Window as FetchBrowserWalletWindow } from "@fetchai/wallet-types";
 
declare global {
  // eslint-disable-next-line @typescript-eslint/no-empty-interface
  interface Window extends FetchBrowserWalletWindow {}
}

Legacy Keplr APIs (will be deprecated)

We recognize that Keplr APIs are broadly utilized in most Cosmos dApps.

To assist dApp creators, we support Keplr APIs, allowing them to use their existing logic with the ASI Alliance Wallet. This support facilitates a gradual transition to more advanced APIs of the ASI Browser Wallet.

To access keplr APIs, you can simply refer to the keplr property of the FetchBrowserWallet window object. Something like to the one provided on the left.

To use keplr APIs, refer to the keplr docs (opens in a new tab).


const fetchBrowserWallet = await getFetchBrowserWallet();
const keplr = fetchBrowserWallet.keplr;
 
// Keplr specific features can be accessed now.
await keplr.enable("fetchhub-4");

ASI Alliance Wallet APIs

To access ASI Alliance Wallet APIs, you can simply refer to the wallet property of the FetchBrowserWallet window object.

Something like this:


const fetchBrowserWallet = await getFetchBrowserWallet();
const fetchWallet = fetchBrowserWallet.wallet;
 
// Fetch wallet specific features can be accessed now.
await fetchWallet.status();

Wallet Status

Provides the status of the wallet, indicating whether it is NOTLOADED, EMPTY, LOCKED, or UNLOCKED. Description for each status can be found here .

Params

none

Returns

Promise<WalletStatus>

request
await fetchWallet.status();

result
3 // WalletStatus.UNLOCKED

Unlock Wallet

This initiates a user interaction that unlocks the wallet through a pop-up interface. Upon calling the API, the wallet pop-up requests the wallet password to unlock it.

Params

none

Returns

Promise<void>

request
await fetchWallet.unlockWallet();

Lock Wallet

Locks the wallet keyring and updates the wallet status to LOCKED.

Params

none

Returns

Promise<void>

request
await fetchWallet.lockWallet();

Restore Wallet

This method restores the wallet and provides its status, similar to the status method of the API. This is necessary when there are upgrades to the wallet version and the wallet has to be reloaded. It's recommended to perform this action every time the dApp is initialized. Description for each status can be found here .

Params

none

Returns

Promise<WalletStatus>

request
await window.fetchBrowserWallet.wallet.restoreWallet();

result
await window.fetchBrowserWallet.wallet.restoreWallet();

Enable Permissions

This is used to grant basic permissions to the dApp. Users need to provide these permissions so the dApp can fetch details such as networks and accounts. When this API is called, a popup appears, asking the user for approval.

Params

chainId string (required): The chain id of the chain for which permissions are to be enabled.

request
// Permissions deleted for all networks
await window.fetchBrowserWallet.wallet.disable();
 
// Permissions deleted for ‘fetchhub-4’
await window.fetchBrowserWallet.wallet.disable('fetchhub-4');

Disable Permissions

Deletes permissions granted to an origin. If specific chain IDs are provided, only permissions granted to each specified chain ID are deleted. Otherwise, all permissions granted to the origin are removed, including those not assigned to specific chains.

Params

chainId string (optional): The chain id of the chain for which permissions are to be disabled.

request
// Permissions deleted for all networks
await window.fetchBrowserWallet.wallet.disable();
 
// Permissions deleted for ‘fetchhub-4’
await window.fetchBrowserWallet.wallet.disable('fetchhub-4');

Get Network

Retrieves the current network configuration that the wallet is currently pointing to.

Params

none

Returns

Promise<NetworkConfig>

Further reference documentation is available here: NetworkConfig

Error

If the wallet is locked
If the dApp does not have permission to the networks API.

request
await fetchWallet.networks.getNetwork();

result
{
  "chainId": "dorado-1",
  "chainName": "Dorado",
  "networkType": "cosmos",
  "rpcUrl": "https://rpc-dorado.fetch.ai",
  "restUrl": "https://rest-dorado.fetch.ai",
  "bip44s": [
    {
      "coinType": 118
    }
  ],
  "bech32Config": {
    "bech32PrefixAccAddr": "fetch",
    "bech32PrefixAccPub": "fetchpub",
    "bech32PrefixValAddr": "fetchvaloper",
    "bech32PrefixValPub": "fetchvaloperpub",
    "bech32PrefixConsAddr": "fetchvalcons",
    "bech32PrefixConsPub": "fetchvalconspub"
  },
  "currencies": [
    {
      "type": "native",
      "description": "",
      "display": "",
      "name": "",
      "decimals": 18,
      "denomUnits": [
        {
          "name": "TESTFET",
          "exponent": 18
        },
        {
          "name": "atestfet",
          "exponent": 0
        }
      ]
    },
    {
      "type": "native",
      "description": "",
      "display": "",
      "name": "",
      "decimals": 9,
      "denomUnits": [
        {
          "name": "MOBX",
          "exponent": 9
        },
        {
          "name": "nanomobx",
          "exponent": 0
        }
      ]
    }
  ],
  "feeCurrencies": [
    {
      "type": "native",
      "description": "",
      "display": "",
      "name": "",
      "decimals": 18,
      "denomUnits": [
        {
          "name": "TESTFET",
          "exponent": 18
        },
        {
          "name": "atestfet",
          "exponent": 0
        }
      ]
    },
    {
      "type": "native",
      "description": "",
      "display": "",
      "name": "",
      "decimals": 9,
      "denomUnits": [
        {
          "name": "MOBX",
          "exponent": 9
        },
        {
          "name": "nanomobx",
          "exponent": 0
        }
      ]
    }
  ],
  "stakeCurrency": {
    "type": "native",
    "description": "",
    "display": "",
    "name": "",
    "decimals": 18,
    "denomUnits": [
      {
        "name": "TESTFET",
        "exponent": 18
      },
      {
        "name": "atestfet",
        "exponent": 0
      }
    ]
  },
  "gasPriceStep": {
    "low": 0,
    "average": 5000000000,
    "high": 6250000000
  },
  "features": [
    "cosmwasm",
    "ibc-go",
    "ibc-transfer",
    "wasmd_0.24+",
    "query:/cosmos/bank/v1beta1/spendable_balances"
  ]
}

Switch Network

Add a specified network if it doesn't exist and switch to it. The user will be asked for approval, and all the permissions for the new chain ID will be provided to the dApp.

Params (required)

NetworkConfig

Returns

Promise<void>

Error

If the wallet is locked.
If the dApp does not have permission to the networks API.

request
await fetchWallet.switchToNetwork(networkConfig);

Switch Network By ChainId

Switch to an existing network by chain ID. The user will be asked for approval, and all the permissions for the new chain ID will be provided to the dApp.

Params

chainId string (required): The chain id of the new network to target.

Error

If the wallet is locked
If the dApp does not have permission to the networks API.
If the chain id does not exist.

request
await fetchWallet.networks.switchToNetwork(chainId);

List Networks

List all the currently known networks in the wallet.

Params

none

Returns

Promise<NetworkConfig[]>

Further reference documentation is available here: NetworkConfig

Error

If the wallet is locked
If the dApp does not have permission to the networks API.

request
await fetchWallet.networks.listNetworks();

result
[
  {
    "chainId": "fetchhub-4",
    "chainName": "fetchhub",
    "networkType": "cosmos",
    "rpcUrl": "https://rpc-fetchhub.fetch.ai:443",
    "restUrl": "https://rest-fetchhub.fetch.ai",
    "bip44s": [
      {
        "coinType": 118
      }
    ],
    "bech32Config": {
      "bech32PrefixAccAddr": "fetch",
      "bech32PrefixAccPub": "fetchpub",
      "bech32PrefixConsAddr": "fetchvalcons",
      "bech32PrefixConsPub": "fetchvalconspub",
      "bech32PrefixValAddr": "fetchvaloper",
      "bech32PrefixValPub": "fetchvaloperpub"
    },
    "currencies": [
      {
        "type": "native",
        "description": "",
        "display": "",
        "name": "",
        "coinGeckoId": "fetch-ai",
        "decimals": 18,
        "denomUnits": [
          {
            "name": "FET",
            "exponent": 18
          },
          {
            "name": "afet",
            "exponent": 0
          }
        ]
      },
      {
        "type": "native",
        "description": "",
        "display": "",
        "name": "",
        "decimals": 9,
        "denomUnits": [
          {
            "name": "MOBX",
            "exponent": 9
          },
          {
            "name": "nanomobx",
            "exponent": 0
          }
        ]
      },
      {
        "type": "native",
        "description": "",
        "display": "",
        "name": "",
        "decimals": 9,
        "denomUnits": [
          {
            "name": "NOMX",
            "exponent": 9
          },
          {
            "name": "nanonomx",
            "exponent": 0
          }
        ]
      },
      {
        "type": "native",
        "description": "",
        "display": "",
        "name": "",
        "decimals": 6,
        "denomUnits": [
          {
            "name": "LRN",
            "exponent": 6
          },
          {
            "name": "ulrn",
            "exponent": 0
          }
        ]
      }
    ],
    "feeCurrencies": [
      {
        "type": "native",
        "description": "",
        "display": "",
        "name": "",
        "coinGeckoId": "fetch-ai",
        "decimals": 18,
        "denomUnits": [
          {
            "name": "FET",
            "exponent": 18
          },
          {
            "name": "afet",
            "exponent": 0
          }
        ]
      },
      {
        "type": "native",
        "description": "",
        "display": "",
        "name": "",
        "decimals": 9,
        "denomUnits": [
          {
            "name": "MOBX",
            "exponent": 9
          },
          {
            "name": "nanomobx",
            "exponent": 0
          }
        ]
      },
      {
        "type": "native",
        "description": "",
        "display": "",
        "name": "",
        "decimals": 9,
        "denomUnits": [
          {
            "name": "NOMX",
            "exponent": 9
          },
          {
            "name": "nanonomx",
            "exponent": 0
          }
        ]
      },
      {
        "type": "native",
        "description": "",
        "display": "",
        "name": "",
        "decimals": 6,
        "denomUnits": [
          {
            "name": "LRN",
            "exponent": 6
          },
          {
            "name": "ulrn",
            "exponent": 0
          }
        ]
      }
    ],
    "stakeCurrency": {
      "type": "native",
      "description": "",
      "display": "",
      "name": "",
      "coinGeckoId": "fetch-ai",
      "decimals": 18,
      "denomUnits": [
        {
          "name": "FET",
          "exponent": 18
        },
        {
          "name": "afet",
          "exponent": 0
        }
      ]
    },
    "gasPriceStep": {
      "average": 0.025,
      "high": 0.035,
      "low": 0.025
    },
    "features": [
      "cosmwasm",
      "ibc-go",
      "ibc-transfer",
      "wasmd_0.24+",
      "query:/cosmos/bank/v1beta1/spendable_balances"
    ],
    "chainSymbolImageUrl": "https://raw.githubusercontent.com/chainapsis/keplr-chain-registry/main/images/fetchhub/fet.png"
  },
  ...
]

Current Account

Get the currently selected account in the wallet.

Params

none

Returns

Promise<Account>

Further reference documentation is available here: Account

Error

If the wallet is locked
The dApp does not have permission to access the Accounts API.

request
await fetchWallet.accounts.currentAccount();

result
{
  "name": "test2",
  "algo": "secp256k1",
  "pubKey": {
    "0": 2,
    "1": 133,
    "2": 61,
    "3": 149,
    "4": 34,
    "5": 47,
        ...
  },
  "address": {
    "0": 180,
    "1": 186,
    "2": 122,
    "3": 150,
    "4": 163,
    "5": 23,
        ...
  },
  "bech32Address": "fetch1kja8494rza32y5nh0r8krqcp5ngdq8g994wm50",
  "isNanoLedger": false,
  "isKeystone": false,
  "EVMAddress": "" // This will come if the selected network is an EVM network
}

Switch Account

Change the current active account to the specified address in the parameters. The user will be asked for approval via the wallet popup. All account and signing permissions will be given by default.

Params

address (string): The address to switch to

Returns

Promise<void>

Error

If the wallet is locked
The dApp does not have permission to access the Accounts API.
If the provided address does not exist.

request
await fetchWallet.accounts.switchAccount("fetch1kja8494rza32y5nh0r8krqcp5ngdq8g994wm50);

List Accounts

Allows the user to list the available accounts for the selected network.

Params

none

Returns

Promise<Account[]>

Further reference documentation is available here: Account

Error

If the wallet is locked
The dApp does not have permission to access the Accounts API.

request
await fetchWallet.accounts.listAccounts();

result
[
  {
    "name": "test2",
    "algo": "secp256k1",
    "pubKey": {
      "0": 2,
      "1": 133,
      "2": 61,
      "3": 149,
      "4": 34,
      "5": 47,
            ...
    },
    "address": {
      "0": 180,
      "1": 186,
      "2": 122,
      "3": 150,
      "4": 163,
      "5": 23,
      "6": 98,
      "7": 162,
      "8": 82,
            ...
    },
    "bech32Address": "fetch1kja8494rza32y5nh0r8krqcp5ngdq8g994wm50",
    "isNanoLedger": false,
    "isKeystone": false,
    "EVMAddress": "" // This will come if the selected network is an EVM network
  },
  ...
]

Get Account

Allows the user to look up a specific account by its address.

Params

address (string) required: The address of the account to lookup.

Returns

Promise<Account>

Further reference documentation is available here: Account

Error

If the wallet is locked
The dApp does not have permission to access the Accounts API.
If the provided address does not exist.

request
await fetchWallet.accounts.getAccount("fetch1kja8494rza32y5nh0r8krqcp5ngdq8g994wm50");

result
{
  "name": "test2",
  "algo": "secp256k1",
  "pubKey": {
    "0": 2,
    "1": 133,
    "2": 61,
    "3": 149,
    "4": 34,
    "5": 47,
        ...
  },
  "address": {
    "0": 180,
    "1": 186,
    "2": 122,
    "3": 150,
    "4": 163,
    "5": 23,
        ...
  },
  "bech32Address": "fetch1kja8494rza32y5nh0r8krqcp5ngdq8g994wm50",
  "isNanoLedger": false,
  "isKeystone": false,
  "EVMAddress": ""
}

List Address Book Entries

Get all the address book entries stored in the wallet.

Params

none

Returns

Promise<AddressBookEntry[]>

Further reference documentation is available here: AddressBookEntry

Error

If the wallet is locked
If dApp does not have permission to access the address book.

request
await fetchWallet.addressBook.listEntries();

result
[
  {
    "address": "fetch1w2thz2rfv63yufy6qxssu7vaq80j50rtxwt243",
    "memo": "Personal account",
    "name": "acc 1"
  },
  {
    "address": "fetch1kja8494rza32y5nh0r8krqcp5ngdq8g994wm50",
    "memo": "Checking account",
    "name": "acc 2"
  }
]

Add Address Book Entry

Adds an address book entry to the wallet.

Params

AddressBookEntry

Returns

Promise<void>

Error

If the entry address already exists in the address book.
The wallet is locked.
If the dApp does not have permission to access the address book.

request
await fetchWallet.addressBook.addEntry({
  "address": "fetch1w2thz2rfv63yufy6qxssu7vaq80jxxxxxxxxx"
  "memo": "This is my testing account",
  "name": "Account 3"
});

Update Address Book Entry

Updates an existing address book entry (memo or name) in the wallet by address.

Params

AddressBookEntry

Returns

Promise<void>

Error

If the entry address does not exist in the address book.
The wallet is locked.
If the dApp does not have permission to access the address book.

request
await fetchWallet.addressBook.updateEntry({
  "address": "fetch1w2thz2rfv63yufy6qxssu7vaq80jxxxxxxxxx",
  "memo": "This is a modified memo",
  "name": "test account 4"
});

Delete Address Book Entry

Deletes a specified address from the address book.

Params

address (string) required

Returns

Promise<void>

Error

If the entry address does not exist in the address book.
The wallet is locked.
If the dApp does not have permission to access the address book.

request
await window.fetchBrowserWallet.wallet.addressBook.deleteEntry("fetch1w2thz2rfv63yufy6qxssu7vaq80jxxxxxxxxx");

Sign Amino

Signs a transaction using the Amino format.

Params

chainId (string): The chain ID of the target blockchain.
signer (string): The address of the signer.
StdSignDoc (object): The sign document containing transaction details.

Further reference documentation is available here: StdSignDoc
signOptions (KeplrSignOptions): Additional signing options (default is an empty object).
- preferNoSetFee (boolean) optional
- preferNoSetMemo (boolean) optional
- disableBalanceCheck (boolean) optional

Returns

Promise<AminoSignResponse>

Further reference documentation is available here: AminoSignResponse

Error

If chainId or Signer does not exist.
If the dApp does not have permissions for signing API.

request
const signer = "fetch1w2thz2rfv63yufy6qxssu7vaq80j50rtxwt243";
const signDoc = {
  "chain_id": "",
  "account_number": "0",
  "sequence": "0",
  "fee": {
    "gas": "0",
    "amount": [
 
    ]
  },
  "msgs": [
    {
      "type": "sign/MsgSignData",
      "value": {
        "signer": signer,
        "data": "aGVsbG8=" //Buffer.from("hello").toString("base64")
      }
    }
  ],
  "memo": ""
};
 
const response = await fetchWallet.signing.signAmino("dorado-1", signer, signDoc);

response
{
  "signed": {
    "account_number": "0",
    "chain_id": "",
    "fee": {
      "amount": [
 
      ],
      "gas": "0"
    },
    "memo": "",
    "msgs": [
      {
        "type": "sign/MsgSignData",
        "value": {
          "data": "aGVsbG8=",
          "signer": "fetch1w2thz2rfv63yufy6qxssu7vaq80j50rtxwt243"
        }
      }
    ],
    "sequence": "0"
  },
  "signature": {
    "pub_key": {
      "type": "tendermint/PubKeySecp256k1",
      "value": "AxJkltEn3Tivz4gltmcqNUn6eJm/b2u8zsGn3m0KOd2U"
    },
    "signature": "ycTOgfNGLFwMsCmxm9vBnuog+cdj4fs8WBEOpw2IXhoSuWkPSgWzEGHgMBxShLzTywoWaApaJqztIturE96EKw=="
  }
}

Sign Direct/Protobuf

Sign transactions directly without using Amino encoding. Signs Proto-encoded StdSignDoc (StdSignDoc )

Params

chainId (string): The chain ID of the target blockchain.
signer (string): The address of the signer.
signDoc (object): The sign document containing transaction details. a. bodyBytes (Uint8Array | null) optional : The body bytes of the transaction. b. authInfoBytes (Uint8Array | null) optional : The authorization info bytes of the transaction. c. chainId (string | null) optional : The chain ID of the transaction. d. accountNumber (Long | null) optional : The account number of the transaction.
signOptions (KeplrSignOptions): Additional signing options (default is an empty object).

Returns

Promise<DirectSignResponse>

Further reference documentation is available here: DirectSignResponse

Error

If chainId or Signer does not exist.
If the dApp does not have permissions for signing API.

request
const signer = "fetch1w2thz2rfv63yufy6qxssu7vaq80j50rtxwt243";
const signDoc = {
  bodyBytes: new Uint8Array([1, 2, 3, 4]), // Mock body bytes
  authInfoBytes: new Uint8Array([5, 6, 7, 8]), // Mock auth info bytes
  chainId: "dorado-1",
  accountNumber: Long.fromNumber(0), // Mock account number};
}
 
const response = await fetchWallet.signing.signDirect("dorado-1", signer, signDoc);

response
{
  "signed": {
    "bodyBytes": "...",
    "authInfoBytes": "...",
    "chainId": "...",
    "accountNumber": "..."
  },
  "signature": {
    "pub_key": {
      "type": "tendermint/PubKeySecp256k1",
      "value": "..."
    },
    "signature": "..."
  }
}

Sign Arbitrary Message

This can be used to sign any arbitrary message to prove ownership of an account.

Params

chainId (string): The chain ID of the network.
signer (string): The address of the account signing the transaction.
data (string | Uint8Array): The data to be signed

Returns

Promise<***StdSignature***>

Further reference documentation is available here: StdSignature

request
await fetchWallet.signing.signArbitrary(
    "dorado-1",
    "fetch1kja8494rza32y5nh0r8krqcp5ngdq8g994wm50",
    "hello"
);

response
{
  "pub_key": {
    "type": "tendermint/PubKeySecp256k1",
    "value": "AoU9lSIv+Zf7+gSjlikKQqNhYp0o1H72A5XFgoJW1yvL"
  },
  "signature": "BZZOpR6HPO7Eskzo7fB5LTsTPKRcOyJ4lOYY95fMsM1Vo9myKMkVU694g3CndUhLA6KgHOwlZwAiGqqCT/6+Fw=="
}

Verify Arbitrary Message

Verifies a signature made via the signArbitrary API.

Params

chainId The target chain id
signer The target signer
data The data that should have been signed
signature The signature to verify

Returns

Promise<boolean>

True if the signature is verified, otherwise false.

request
await fetchWallet.signing.signArbitrary(
    "dorado-1",
    "fetch1kja8494rza32y5nh0r8krqcp5ngdq8g994wm50",
    "hello",
    {
        "pub_key": {
            "type": "tendermint/PubKeySecp256k1",
            "value": "AoU9lSIv+Zf7+gSjlikKQqNhYp0o1H72A5XFgoJW1yvL"
        },
        "signature": "BZZOpR6HPO7Eskzo7fB5LTsTPKRcOyJ4lOYY95fMsM1Vo9myKMkVU694g3CndUhLA6KgHOwlZwAiGqqCT/6+Fw=="
    }
);

response
true

Get Offline Signer

Get a signer capable of either Direct or Amino signing methods.

Params

chainId: The targeted chain id.

Returns

Promise<OfflineDirectSigner | OfflineAminoSigner>

A CosmJS compatible signer.

Type description:

OfflineDirectSigner
- getAccounts()
  
  Get AccountData array from wallet. Rejects if not enabled.
  
  Returns Promise<readonly AccountData[]>
- signDirect(signerAddress: string, signDoc: SignDoc)
  
  Sign transactions directly without using Amino encoding.
OfflineAminoSigner
- getAccounts()
  
  Get AccountData array from wallet. Rejects if not enabled.
  
  Returns *Promise<readonly AccountData[]>*
- signAmino(signerAddress: string, signDoc: StdSignDoc)
  
  Request signature from whichever key corresponds to provided bech32-encoded address. Rejects if not enabled.

request
await fetchWallet.signing.getOfflineSigner(chainId);

Get Offline Amino Signer

Get a signer capable of Amino signing methods.

Params

chainId: The targeted chain id.

Returns

Promise<OfflineAminoSigner>

A CosmJS compatible amino signer.

Type description:

OfflineAminoSigner
- getAccounts()
  
  Get AccountData array from wallet. Rejects if not enabled.
  
  Returns Promise<readonly AccountData[]>
- signAmino(signerAddress: string, signDoc: StdSignDoc)
  
  Request signature from whichever key corresponds to provided bech32-encoded address. Rejects if not enabled.

request
await fetchWallet.signing.getOfflineAminoSigner(chainId);

Get Offline Direct Signer

Get a signer capable of Direct signing methods.

Params

chainId: The targeted chain id.

Returns

Promise<OfflineDirectSigner>

A CosmJS compatible direct signer.

Type description:

OfflineDirectSigner
- getAccounts()
  
  Get AccountData array from wallet. Rejects if not enabled.
  
  Returns Promise<readonly AccountData[]>
- signDirect(signerAddress: string, signDoc: SignDoc)
  
  Sign transactions directly without using Amino encoding.

request
await fetchWallet.signing.getOfflineDirectSigner(chainId);

Sign Ethereum

This method signs Ethereum transactions or Arbitrary messages using the current chainId and current wallet account.

Params

data (string | Uint8Array): The data that needs to be signed
type (EthSignType ): The type of Ethereum signature.

Returns

Promise<Uint8Array>

Signature in uint8array format.

Example request: EthSignType.MESSAGE
await fetchWallet.signing.signEthereum("hello", EthSignType.MESSAGE);

Example response: EthSignType.MESSAGE
{
  "0": 164,
  "1": 222,
  "2": 173,
  "3": 32,
  "4": 98,
  "5": 213,
  "6": 72,
...
}

Example request: EthSignType.TRANSACTION
const encoder = new TextEncoder();
const valueInWei = ethers.parseEther(value ? value : "0.000001").toString();
const rawTx = {
    to: "0x16eb926F78A1b557A1FC5Da62ceBC1b9b6F6ccf2",
    value: ethers.hexlify(ethers.toUtf8Bytes(valueInWei)),
    nonce: 0,
    chainId: 11155111,
    gasLimit: ethers.hexlify(ethers.toUtf8Bytes("21000")),
};
 
const signData = await fetchWallet.signing.signEthereum(
    encoder.encode(JSON.stringify(rawTx)),
    EthSignType.TRANSACTION
);

Example response: EthSignType.TRANSACTION
{
  "0": 248,
  "1": 109,
  "2": 128,
  "3": 128,
  "4": 133,
  "5": 50,
  "6": 49,
  "7": 48,
  "8": 48,
  "9": 48,
...
}

Events

The wallet emits certain window events that can be useful to update the data shown in the dApp. Currently there are 3 events emitted.

Status Changed

fetchwallet_walletstatuschange

When the status of the wallet changes as described here (from the wallet or the dApp), the dApp can react accordingly to the updated status. For example, if the wallet is locked, the dApp can show a screen that allows unlocking the wallet. Once unlocked, the dApp can use this event to fetch all the required data like account and network details.


window.addEventListener("fetchwallet_walletstatuschange", () => {
    console.log("Wallet status is changed. You may need to update the screen to reflect the new status")
})

Network Changed

fetchwallet_networkchange

This event is emitted when the network is changed in the wallet (either from the wallet or from the dApp). When the network is switched in the wallet, the bech32 address and other network-specific parameters change as well. It's a good idea to listen for this event and update the network parameters accordingly.


window.addEventListener("fetchwallet_networkchange", () => {
    console.log("Wallet network is changed. You may need to refetch network info")
})

Account Changed

fetchwallet_keystorechange

When the user switches their key store/account after the webpage has received the information on the key store/account the key that the webpage is aware of may not match the selected key in the wallet which may cause issues in the interactions.

To prevent this from happening, when the key store/account is changed, the wallet emits a fetchwallet_keystorechange event to the webpage's window. You can request the new key/account based on this event listener.


window.addEventListener("fetchwallet_keystorechange", () => {
    console.log("Wallet network is changed. You may need to refetch keyring data")
})

Types

WalletStatus


enum EthSignType {
        // The wallet accounts are not yet loaded.
    NOTLOADED = 0,
    // There are no accounts configured in the wallet yet.
    EMPTY = 1,
    // Wallet is locked.
    LOCKED = 2,
    // Wallet is unlocked and ready to use.
    UNLOCKED = 3
}

NetworkConfig

chainId (string)

The chain id of the network name.
chainName (string)

The human-readable name for the network.
networktype (“cosmos” | “evm”)

The network type.
rpcUrl (string)

The base RPC used for interacting with the network.
grpUrl (string) optional

Cosmos only, optional: The URL to the GRPC interface for the network.
restUrl (string) optional deprecated

Cosmos only, optional: The URL to the REST or LCD interface.
type ( “mainnet” | “testnet”) optional

The type of the network, i.e. is it a main network or using for testing.
status (“alpha” | “beta” | “production”) optional

The status or maturity of the network. i.e. is it production quality or not.
bip44s (BIP44[])

The set of BIP44 configurations used for determining HD wallets. A valid configuration must have at least only entry in this list. The first entry in this list is considered the primary BIP44 configuration. Additional BIP44 configurations are also permitted.
- BIP44 (object)
  - coinType (number)
    
    The coin type value to be appended into the HD Path.
bech32Config (Bech32Config)

Cosmos only, required: The Bech32 prefixes that are required for the network.
- Bech32Config (object)
  - bech32PrefixAccAddr (string)
  - bech32PrefixAccPub (string)
  - bech32PrefixValAddr (string)
  - bech32PrefixValPub (string)
  - bech32PrefixConsAddr (string)
  - bech32PrefixConsPub (string)
currencies (array[Currency])

The complete set of currencies that are known for the network.
- Currency (type)
  
  NativeCurrency | IBCCurrency | CW20Currency | ERC20Currency
  
  these above currencies are all derived from BaseCurrency and have few extra properties of their own.
  - BaseCurrency
    - type (string)
      
      “native” | “cw20” | “erc20” | “ibc”
    - description (string) optional
      
      An optional description for the currency.
    - denomUnits (DenomUnit[])
      
      The set of units that are applicable for this currency.
      - DenomUnit (object)
        
        name (string)
        
        The name of the unit.
        
        exponent (number)
        
        The exponent for the number of units in the form 10^(exponent).
        
        aliases (array[string]) optional
        
        An optional set of aliases for the unit.
    - display (string)
      
      The display name for the currency.
    - name (string)
      
      The canonical name for the currency.
    - decimals (number)
      
      The decimals of the currency
    - coinGeckoId (string) optional
      
      This is used to fetch asset’s fiat value from coingecko. You can get id from here (opens in a new tab).
    - imageUrl (string) optional
      
      The optional URL for the currency image.
  Extra properties in:
  - NativeCurrency
    
    a native currency.
    - denom (string)
      
      The canonical denomination for the currency.
  - IBCCurrency
    
    An IBCCurrency is the currency that is sent from the other chain via IBC. This will be handled as similar to the native currency. However, additional information is required about the IBC channels and paths that were used.
    - paths (array[IbcPath])
      
      The IBC paths associated with this currency.
      
      portId (string)
      
      The IBC port id.
      
      channelId (string)
      
      The IBC channel id.
    - originChainId (string | undefined)
      
      The chain id that the currency is from if known.
    - originCurrency (NativeCurrency | CW20Currency | undefined)
      
      The origin currency if known.
  - CW20Currency
    
    CW20 (contract based) currency.
    - contractAddress (string)
      
      The contract address for the currency.
  - ERC20Currency
    - contractAddress (string)
      
      The contract address for the currency.
feeCurrencies (array[NativeCurrency])

The subset of the currencies that are allows for paying fees.
stakeCurrency (NativeCurrency)

The native currency that is allowed for staking.
gasPriceStep (gas price config object) optional

The gas price configuration for the network.
features (array[string])

Set of features enabled for the network.
explorerUrl (string) optional

Explorer url for the network.
chainSymbolImageUrl (string) optional

Network logo.

Account

address (Uint8Array)

The address of the account.
pubKey (Uint8Array)

The public key of the account.
name (string)

The name of the account.
algo (string)

The algo used for the account.
bech32Address (string)

The bech32Address of the account.
EVMAddress (string)

The Hex Address of the account.
isNanoLedger (boolean)

Is Nano Ledger account.
isKeystone (boolean)

Is Keystone account.

AddressBookEntry

address (string)

The representation is chain specific. For example in the case of the Fetch chain it should be bech32 encoded and should have the prefix fetch.
name (string)

The human-readable name associated with the address.
memo (string)

The human-readable memo associated with the address.

StdSignDoc

chain_id (string)
account_number (string)
sequence (string)
timeout_height (string) optional
fee (stdFee)
- amount (Coin[])
  - denom (string)
  - amount (string)
- gas (string)
- payer (string) optional
- granter (string) optional
- feePayer (string) optional
msgs (Msg[])
memo (string)

AminoSignResponse

signed (StdSignDoc)
signature (StdSignature)
- pub_key (PubKey)
  - type (string)
  - value (string)
- Signature (string)

DirectSignResponse

signed (SignDoc)
- bodyBytes: (Uint8Array)
- authInfoBytes: (Uint8Array)
- chainId: (string)
- accountNumber: (Long)
signature (StdSignature)
- pub_key (PubKey)
  - type (string)
  - value (string)
- Signature (string)

StdSignature

pub_key (PubKey)
- type (string)
- value (string)
Signature (string)

EthSignType


enum EthSignType {
    MESSAGE = "message",
    TRANSACTION = "transaction",
    EIP712 = "eip-712"
}

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Functions API