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Use the Aptos CLI with Ledger

The aptos tool can be used with your Ledger device to sign any transaction. This is the most secure way to sign transactions, as your private key never leaves your device.

NOTE: It is highly recommended to use Ledger Nano S Plus or Ledger Nano X devices. The Ledger Nano S device has very limited memory and may not be able to sign most of the transactions. If you are trying to sign a transaction that is too big for your device to handle, you will get an error Wrong raw transaction length.

Blind Signing​

Before you begin, make sure you have Blind Signing enabled on your Ledger device. Otherwise, you will not be able to sign transactions. Blind Signing - confirming a smart contract interaction you can’t verify through a human-readable language.

Create a new Ledger profile​

In order to interact with your Ledger device, you must first create a new profile. This profile will be used to store your Ledger public key, and will be used to sign transactions.

$ aptos init --profile myprofile --ledger
Configuring for profile myprofile
Choose network from [devnet, testnet, mainnet, local, custom | defaults to devnet]

No network given, using devnet...
Please choose an index from the following 5 ledger accounts, or choose an arbitrary index that you want to use:
[0] Derivation path: m/44'/637'/0'/0'/0' (Address: 59836ba1dd0c845713bdab34346688d6f1dba290dbf677929f2fc20593ba0cfb)
[1] Derivation path: m/44'/637'/1'/0'/0' (Address: 21563230cf6d69ee72a51d21920430d844ee48235e708edbafbc69708075a86e)
[2] Derivation path: m/44'/637'/2'/0'/0' (Address: 667446181b3b980ef29f5145a7a2cc34d433fc3ee8c97fc044fd978435f2cb8d)
[3] Derivation path: m/44'/637'/3'/0'/0' (Address: 2dcf037a9f31d93e202c074229a1b69ea8ee4d2f2d63323476001c65b0ec4f31)
[4] Derivation path: m/44'/637'/4'/0'/0' (Address: 23c579a9bdde1a59f1c9d36d8d379aeefe7a5997b5b58bd5a5b0c12a4f170431)
0
Account 59836ba1dd0c845713bdab34346688d6f1dba290dbf677929f2fc20593ba0cfb has been already found on-chain

---
Aptos CLI is now set up for account 59836ba1dd0c845713bdab34346688d6f1dba290dbf677929f2fc20593ba0cfb as profile myprofile!  Run `aptos --help` for more information about commands
{
  "Result": "Success"
}

In the above, we have created a new profile called myprofile and have chosen to use the first Ledger account (index 0) to sign transactions. If there is a certain index account you would like to use, you are welcome to use it.

After the above command, a new profile will be created in ~/.aptos/config.yml and will look like the following:

myprofile:
  public_key: "0x05a8ace09d1136181029be3e817de3619562b0da2eedbff210e2b2f92c71be70"
  account: 59836ba1dd0c845713bdab34346688d6f1dba290dbf677929f2fc20593ba0cfb
  rest_url: "https://api.devnet.aptoslabs.com"
  faucet_url: "https://faucet.devnet.aptoslabs.com"
  derivation_path: "m/44'/637'/0'/0'/0'"

Notice that the above stores the derivation path instead of private key. This is because the private key is stored on your Ledger device, and is never exposed to the aptos tool.

Publish a package with Ledger​

Once you have created a profile, you can use it to publish a package. The aptos tool will prompt you to confirm the transaction on your Ledger device. Note: Make sure that you are on the same directory as where your move module is located:

$ aptos move publish --profile myprofile --named-addresses hello_blockchain=myprofile
Compiling, may take a little while to download git dependencies...
INCLUDING DEPENDENCY AptosFramework
INCLUDING DEPENDENCY AptosStdlib
INCLUDING DEPENDENCY MoveStdlib
BUILDING Examples
package size 1755 bytes
Do you want to submit a transaction for a range of [139600 - 209400] Octas at a gas unit price of 100 Octas? [yes/no] >
yes
{
  "Result": {
    "transaction_hash": "0xd5a12594f85284cfd5518d547d084030b178ee926fa3d8cbf699cc0596eff538",
    "gas_used": 1396,
    "gas_unit_price": 100,
    "sender": "59836ba1dd0c845713bdab34346688d6f1dba290dbf677929f2fc20593ba0cfb",
    "sequence_number": 0,
    "success": true,
    "timestamp_us": 1689887104333038,
    "version": 126445,
    "vm_status": "Executed successfully"
  }
}

After the above command, you will be prompted to confirm the transaction on your Ledger device. Once you confirm, the transaction will be submitted to the network. Note: Make sure you have Blind Signing enabled on your Ledger device. Otherwise, you will not be able to sign transactions. Blind Signing - confirming a smart contract interaction you can’t verify through a human-readable language.

Common Errors​

Error: Wrong raw transaction length​

Your raw transaction or package size is too big. Currently, the Aptos ledger app can only support up to 20kb transaction. If you are using a Ledger Nano S, the supported transaction size will be even smaller.

{
  "Error": "Unexpected error: Error - Wrong raw transaction length"
}

Error: Ledger device is locked​

Make sure your Ledger device is unlocked and you have Aptos app opened

{
  "Error": "Unexpected error: Error - Ledger device is locked"
}