bip39-create-accounts

BIP39 Create Accounts

This code snippet demonstrates how to generate multiple ECDSA accounts on Hedera using a BIP-39 seed phrase. It outputs a .env file in the current working directory (cwd) intended for use in this or other code snippets/ tutorials/ workshops.

Run the following command:

node ./create-accounts.js

This will generate multiple EVM addresses from a BIP39 seed phrase, and then prompt you with the following:

Do you wish to overwrite "/Users/user/code/hedera/hedera-code-snippets/bip39-create-accounts/.env"? (y/N):

If you answer y:

OK, .env file written to "/Users/user/code/hedera/hedera-code-snippets/bip39-create-accounts/.env".`

If you answer otherwise:

'OK, .env file contents output to console instead.

Code

• @ethersproject/hdnode is imported as ethersHdNode
• ethersHdNode.fromMnemonic is used to parse the BIP39 seed phrase and the derivation path
• TransferTransaction is imported from the Hedera SDK
• A single transfer transaction that transfers HBAR (addHbarTransfer) from the operator account to each of the generated EVM addresses is signed by the operator account and submitted to the network
• A .env file is constructed as a string based on the outcome of ethersHdNode.fromMnemonic and TransferTransaction
• node:readline is used to prompt whether to allow the .env file to be overwritten

References

• Stackoverflow: How can I use Hedera JS SDK to generate a set of ECDSA key-pairs based on a BIP-39 seed phrase and a custom derivation path? - https://stackoverflow.com/q/76002731/194982
• Adapted from original implementation in:
  • Hedera Docs: Hedera Smart Contracts Workshop - Setup - Step B4: Fund several Hedera EVM accounts - https://docs.hedera.com/hedera/tutorials/smart-contracts/hscs-workshop/setup#step-b4-fund-several-hedera-evm-accounts
  • Github demo repo: https://github.com/hedera-dev/hedera-smart-contracts-workshop/blob/main/intro/generate-evm-accounts.js