Sign EVM transactions with mnemonic and optional bip44 path

Example

const mnemonic = 'all all all all all all all all all all all all'

const transaction = {
    to: `0x8a65ac0e23f31979db06ec62af62b132a6df4741`,
    data: `0x12345c0e23f31979db06ec62af62b132a6df4741`,
    gasLimit: 200000,
    gasPrice: `0x123`,
    value: '0x456',
    chainId: 1,
}

const message = 'Message to sign'

await signTx(transaction, mnemonic)
=
0xf8648082012383030d40948a65ac0e23f31979db06ec62af62b132a6df47418201238025a03ab47df7bc1fbc3c491fb35d0261b085ae9840c4ecfe72a2e29543045cd82c2fa003833f1220a80b11ad6eb6b55068604612bedf91dd5480f594aeb1efa0612e4a

await getAddress(mnemonic)
=
0x73d0385f4d8e00c5e6504c6030f47bf6212736a8

await getPrivateKey(mnemonic)
=
759e46263f1505994d11142d70027975c9b9fef15489b09bd987eb8a31aba0db

await signMessage(message, mnemonic)
=
0xb12c2106ce0983e5fb271b06d23f8e6c17dc3f05a1db17e9bcb4f925fd84157021a1ef392780ac19995eeca7f01851260b7c7fcd09a8f6dd80f3604107b9a48a1c

// custom hd path
await getAddress(mnemonic, `m/44'/60'/0'/0/1`)
=
0xfa01a39f8abaeb660c3137f14a310d0b414b2a15

// validating valid bip39 mnemonic
await validateMnemonic(mnemonic)
=
true