Starknet Snap API

With the Starknet Snap installed, dapps can use the Starknet Snap API to interact with users' Starknet accounts (for example, to send transactions).

note

You can also communicate with the Starknet network using the Starknet API.

starkNet_createAccount

Deploys an account contract.

Parameters

• addressIndex: integer - (Optional) Specific address index of the derived key in BIP-44.
• deploy: boolean - (Optional) Indicate whether to include send the deploy transaction for the account contract. The default is false.
• chainId: string - (Optional) ID of the target Starknet network. The default is the Starknet Goerli testnet.

Returns

The response from Starknet's gateway/add_transaction API endpoint.

Example

Request

await window.ethereum.request({
  method: "wallet_invokeSnap",
  params: {
    snapId: "npm:@consensys/starknet-snap",
    request: {
      method: "starkNet_createAccount",
      "params": {
        "addressIndex": 1,
        "deploy": true,
        "chainId": "0x1"
      },
    },
  },
})

Result

{
  "transaction_hash": "0x05a56e2d52c817161883f50c441c3228cfe54d9f84b5b5b8b1c8b8e0e6f7e6d8",
  "address": "0xb60e8dd61c5d32be8058bb8eb970870f07233155"
}

starkNet_displayPrivateKey

Extracts the private key from the deployed Starknet account and displays it in MetaMask.

Parameters

• userAddress: string - Address of the account contract.
• chainId: string - (Optional) ID of the target Starknet network. The default is the Starknet Goerli testnet.

Returns

Always returns null for security reasons. The private key is only shown in the MetaMask pop-up window.

Example

Request

await window.ethereum.request({
  method: "wallet_invokeSnap",
  params: {
    snapId: "npm:@consensys/starknet-snap",
    request: {
      method: "starkNet_displayPrivateKey",
      params: {
        userAddress: "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
        chainId: "0x1"
      },
    },
  },
})

Result

null

starkNet_estimateAccountDeployFee

Gets the estimated gas fee for deploying an account contract.

Parameters

• addressIndex: integer - (Optional) Specific address index of the derived key in BIP-44.
• chainId: string - (Optional) ID of the target Starknet network. The default is the Starknet Goerli testnet.

Returns

The response from Starknet's feeder_gateway/estimate_fee API endpoint.

Example

Request

await window.ethereum.request({
  method: "wallet_invokeSnap",
  params: {
    snapId: "npm:@consensys/starknet-snap",
    request: {
      method: "starkNet_estimateAccountDeployFee",
      params: {
        addressIndex: 0,
        chainId: "0x1"
      },
    },
  },
})

Result

{
  "suggestedMaxFee": "1000000000000000",
  "overallFee": "900000000000000",
  "gasConsumed": "1000000",
  "gasPrice": "1000000000",
  "unit": "wei",
  "includeDeploy": true
}

starkNet_estimateFee

Gets the estimated gas fee for calling a method on any contract.

Parameters

• contractAddress: string - Address of the target contract.
• contractFuncName: string - Target function name of the contract.
• contractCallData: string - (Optional) Call data for the target function with , as a separator.
• senderAddress: string - Address of the sender.
• chainId: string - (Optional) ID of the target Starknet network. The default is the Starknet Goerli testnet.

Returns

The response from Starknet's feeder_gateway/estimate_fee API endpoint.

Example

Request

await window.ethereum.request({
  method: "wallet_invokeSnap",
  params: {
    snapId: "npm:@consensys/starknet-snap",
    request: {
      method: "starkNet_estimateFee",
      params: {
        contractAddress: "0x5B38Da6a701c568545dCfcB03FcB875f56beddC4",
        contractFuncName: "transfer",
        contractCallData: "0x456...,0x789...,100",
        senderAddress: "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
        chainId: "0x1"
      },
    },
  },
})

Result

{
  "suggestedMaxFee": "1000000000000000",
  "overallFee": "900000000000000",
  "gasConsumed": "1000000",
  "gasPrice": "1000000000",
  "unit": "wei",
  "includeDeploy": false
}

starkNet_extractPublicKey

note

This method is integrated into get-starknet.

Extracts the public key from a Starknet account address.

Parameters

• userAddress: string - Address of the account contract.
• chainId: string - (Optional) ID of the target Starknet network. The default is the Starknet Goerli testnet.

Returns

The public key of the given account address (can be different from the actual signer).

Example

Request

await window.ethereum.request({
  method: "wallet_invokeSnap",
  params: {
    snapId: "npm:@consensys/starknet-snap",
    request: {
      method: "starkNet_extractPublicKey",
      params: {
        userAddress: "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
        chainId: "0x1"
      },
    },
  },
})

Result

"0x04bfcab3b7ca7e8b3f3b62b2f7f77e9e4b68080bbf8f0f4a1c8f890864d2c7c1d3c45d8b2e3f5f1c27dfeea4c2f5733e90bfc7484e2a690aa9b8ac4559d2e6a8d7"

starkNet_getErc20TokenBalance

Gets the user's current balance of an ERC-20 token.

Parameters

• tokenAddress: string - Address of the ERC-20 token contract.
• userAddress: string - Address of the user account.
• chainId: string - (Optional) ID of the target Starknet network. The default is the Starknet Goerli testnet.

Returns

The token balance in hexadecimal.

Example

Request

await window.ethereum.request({
  method: "wallet_invokeSnap",
  params: {
    snapId: "npm:@consensys/starknet-snap",
    request: {
      method: "starkNet_getErc20TokenBalance",
      params: {
        tokenAddress: "0x5B38Da6a701c568545dCfcB03FcB875f56beddC4",
        userAddress: "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
        chainId: "0x1"
      },
    },
  },
})

Result

"0x3e8"

starkNet_getStoredUserAccounts

Gets a list of stored user accounts that are either initialized or initializing.

Parameters

chainId: string - (Optional) ID of the target Starknet network. The default is the Starknet Goerli testnet.

Returns

The list of the stored user accounts.

Example

Request

await window.ethereum.request({
  method: "wallet_invokeSnap",
  params: {
    snapId: "npm:@consensys/starknet-snap",
    request: {
      method: "starkNet_getStoredUserAccounts",
      params: {
        chainId: "0x1"
      },
    },
  },
})

Result

[
  {
    "address": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
    "addressIndex": 0,
    "publicKey": "0x04bfcab3b7ca7e8b3f3b62b2f7f77e9e4b68080bbf8f0f4a1c8f890864d2c7c1d3c45d8b2e3f5f1c27dfeea4c2f5733e90bfc7484e2a690aa9b8ac4559d2e6a8d7",
    "addressSalt": "0x789...",
    "deployTxnHash": "0x05a56e2d52c817161883f50c441c3228cfe54d9f84b5b5b8b1c8b8e0e6f7e6d8",
    "derivationPath": "m/44'/9004'/0'/0/0",
    "chainId": "0x1"
  },
  // ... more accounts
]

starkNet_getTransactions

Gets the transaction records from a sender address.

Parameters

• senderAddress: string - Address of the sender.
• contractAddress: string - (Optional) Address of the called contract.
• pageSize: integer - (Optional) Page size when calling the Voyager get "api/txns" endpoint. Options are 10, 25, and 50. The default is 10.
• txnsInLastNumOfDays: integer - (Optional) Number of past days of transaction records to be fetched from Voyager. The default is 5.
• withDeployTxn: boolean - (Optional) Indicates whether to include the deploy transaction of the sender's account contract. The default is false.
• onlyFromState: boolean - (Optional) Indicates whether to only retrieve transaction records that are stored in Snap state, that is, those in RECEIVED, PENDING, ACCEPTED_ON_L2, or REJECTED state. The default is false.
• chainId: string - (Optional) ID of the target Starknet network. The default is the Starknet Goerli testnet.

Returns

The list of the transaction records.

Example

Request

await window.ethereum.request({
  method: "wallet_invokeSnap",
  params: {
    snapId: "npm:@consensys/starknet-snap",
    request: {
      method: "starkNet_getTransactions",
      params: {
        senderAddress: "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
        contractAddress: "0x5B38Da6a701c568545dCfcB03FcB875f56beddC4",
        pageSize: 25,
        txnsInLastNumOfDays: 7,
        withDeployTxn: true,
        onlyFromState: false,
        chainId: "0x1"
      },
    },
  },
})

Result

[
  {
    "txnHash": "0x05a56e2d52c817161883f50c441c3228cfe54d9f84b5b5b8b1c8b8e0e6f7e6d8",
    "txnType": "invoke",
    "senderAddress": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
    "contractAddress": "0x5B38Da6a701c568545dCfcB03FcB875f56beddC4",
    "contractFuncName": "transfer",
    "contractCallData": ["0x789...", "100"],
    "status": "ACCEPTED_ON_L2",
    "failureReason": null,
    "eventIds": ["0xdef..."],
    "timestamp": 1234567890,
    "chainId": "0x1"
  },
  // ... more transactions
]

starkNet_getTransactionStatus

Gets the status of a transaction.

Parameters

• transactionHash: string - Hash of the target transaction.
• chainId: string - (Optional) ID of the target Starknet network. The default is the Starknet Goerli testnet.

Returns

The status of the transaction.

Example

Request

await window.ethereum.request({
  method: "wallet_invokeSnap",
  params: {
    snapId: "npm:@consensys/starknet-snap",
    request: {
      method: "starkNet_getTransactionStatus",
      params: {
        transactionHash: "0x05a56e2d52c817161883f50c441c3228cfe54d9f84b5b5b8b1c8b8e0e6f7e6d8",
        chainId: "0x1"
      },
    },
  },
})

Result

"ACCEPTED_ON_L2"

starkNet_getValue

Calls a VIEW method on any contract.

Parameters

• contractAddress: string - Address of the target contract.
• contractFuncName: string - Target function name of the contract.
• contractCallData: string - (Optional) Call data for the target function with , as a separator.
• chainId: string - (Optional) ID of the target Starknet network. The default is the Starknet Goerli testnet.

Returns

The response from Starknet's feeder_gateway/call_contract API endpoint.

Example

Request

await window.ethereum.request({
  method: "wallet_invokeSnap",
  params: {
    snapId: "npm:@consensys/starknet-snap",
    request: {
      method: "starkNet_getValue",
      params: {
        contractAddress: "0x5B38Da6a701c568545dCfcB03FcB875f56beddC4",
        contractFuncName: "balanceOf",
        contractCallData: "0x456...",
        chainId: "0x1"
      },
    },
  },
})

Result

{
  "result": ["1000"]
}

starkNet_recoverAccounts

note

This method is integrated into get-starknet.

Recovers deployed user accounts from the seed phrase of MetaMask based on BIP-44.

Parameters

• startScanIndex: integer - (Optional) Starting address index of the derived key in BIP-44. The default is 0.
• maxScanned: integer - (Optional) Maximum number of addresses to scan during the recovery process. The default is 1.
• maxMissed: integer - (Optional) Maximum number of uninitialized addresses hit during the recovery process. The default is 1.
• chainId: string - (Optional) ID of the target Starknet network. The default is the Starknet Goerli testnet.

Returns

The list of the scanned user accounts during the recovery process.

Example

Request

await window.ethereum.request({
  method: "wallet_invokeSnap",
  params: {
    snapId: "npm:@consensys/starknet-snap",
    request: {
      method: "starkNet_recoverAccounts",
      params: {
        startScanIndex: 0,
        maxScanned: 5,
        maxMissed: 2,
        chainId: "0x1"
      },
    },
  },
})

Result

[
  {
    "address": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
    "addressIndex": 0,
    "publicKey": "0x04bfcab3b7ca7e8b3f3b62b2f7f77e9e4b68080bbf8f0f4a1c8f890864d2c7c1d3c45d8b2e3f5f1c27dfeea4c2f5733e90bfc7484e2a690aa9b8ac4559d2e6a8d7",
    "addressSalt": "0x789...",
    "deployTxnHash": "0x05a56e2d52c817161883f50c441c3228cfe54d9f84b5b5b8b1c8b8e0e6f7e6d8",
    "derivationPath": "m/44'/9004'/0'/0/0",
    "chainId": "0x1"
  },
  // ... more accounts
]

starkNet_sendTransaction

Signs and sends a transaction.

Parameters

• contractAddress: string - Address of the target contract.
• contractFuncName: string - Target function name of the contract.
• contractCallData: string - (Optional) Call data for the target function with , as a separator.
• senderAddress: string - Address of the sender.
• maxFee: string - (Optional) Maximum gas fee allowed from the sender. If not specified, the maximum fee is automatically calculated.
• chainId: string - (Optional) ID of the target Starknet network. The default is the Starknet Goerli testnet.

Returns

The response from Starknet's gateway/add_transaction API endpoint.

Example

Request

await window.ethereum.request({
  method: "wallet_invokeSnap",
  params: {
    snapId: "npm:@consensys/starknet-snap",
    request: {
      method: "starkNet_sendTransaction",
      params: {
        contractAddress: "0x5B38Da6a701c568545dCfcB03FcB875f56beddC4",
        contractFuncName: "transfer",
        contractCallData: "0x456...,0x789...,100",
        senderAddress: "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
        maxFee: "1000000000000000",
        chainId: "0x1"
      },
    },
  },
})

Result

{
  "transaction_hash": "0x05a56e2d52c817161883f50c441c3228cfe54d9f84b5b5b8b1c8b8e0e6f7e6d8"
}

starkNet_signMessage

note

This method is integrated into get-starknet.

Signs a typed data message.

Parameters

• typedDataMessage: string - JSON representation of the typed data to be signed.
• signerAddress: string - Address of the signer.
• chainId: string - (Optional) ID of the target Starknet network. The default is the Starknet Goerli testnet.

Returns

The signed hash of typed data.

Example

Request

await window.ethereum.request({
  method: "wallet_invokeSnap",
  params: {
    snapId: "npm:@consensys/starknet-snap",
    request: {
      method: "starkNet_signMessage",
      params: {
        typedDataMessage: "{ ... }",
        signerAddress: "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
        chainId: "0x1"
      },
    },
  },
})

Result

"1234567890,9876543210"

starkNet_upgradeAccContract

Upgrades an account contract.

Parameters

• contractAddress: string - Address of the target contract.
• maxFee: string - (Optional) Maximum gas fee allowed from the sender. If not specified, the maximum fee is automatically calculated.
• chainId: string - (Optional) ID of the target Starknet network. The default is the Starknet Goerli testnet.

Returns

The response from Starknet's gateway/call_contract API endpoint.

Example

Request

await window.ethereum.request({
  method: "wallet_invokeSnap",
  params: {
    snapId: "npm:@consensys/starknet-snap",
    request: {
      method: "starkNet_upgradeAccContract",
      params: {
        contractAddress: "0x5B38Da6a701c568545dCfcB03FcB875f56beddC4",
        maxFee: "1000000000000000",
        chainId: "0x1"
      },
    },
  },
})

Result

{
  "transaction_hash": "0xdef..."
}

starkNet_verifyMessage

Verifies a signed typed data message.

Parameters

• typedDataMessage: string - JSON representation of the original typed data message to be verified.
• signerAddress: string - Address of the signer.
• signature: string - Signature of the typed data message.
• chainId: string - (Optional) ID of the target Starknet network. The default is the Starknet Goerli testnet.

Returns

true if the signature is verified, false otherwise.

Example

Request

await window.ethereum.request({
  method: "wallet_invokeSnap",
  params: {
    snapId: "npm:@consensys/starknet-snap",
    request: {
      method: "starkNet_verifyMessage",
      params: {
        typedDataMessage: "{ ... }",
        signerAddress: "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
        signature: "1234567890,9876543210",
        chainId: "0x1"
      },
    },
  },
})

Result

true