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Change keypath derivation logic (#6815) 

While the standard defined by Trezor as the default derivation path here
https://blog.trezor.io/trezor-integration-with-myetherwallet-3e217a652e08
says that it should be `m/44'/60'/0`, in practice they don't have an
implementation of a wallet for Ethereum themselves and refer customers
to MEW.

MEW has a custom implementation of the path derivation logic that allows them to
generate multiple addresses by essentially adding `/0`, `/1` etc to the path.

In my initial implementation of Trezor I didn't take this into
consideration unfortunately and just used the keypath that Trezor
themselves recommended. However, given that it's seemingly standard
practice to append `/0` for a "sub-address" (and this is what we've done
for Ledger as well) it seems like a mistake on my part to not take that
into consideration.

Unfortunately, anyone who has used their Trezor device with Parity
previously would now see a different address when they connect the
Trezor device the next time. The only way they would have to access the
old address is to use an old version, or by going through MEW and
selecting the Ledger keypath.

Also see #6811
This commit is contained in:
Fredrik Harrysson 2017-10-19 11:47:53 +02:00 committed by Arkadiy Paronyan
parent 5281e09828
commit c1288810c6
1 changed files with 2 additions and 2 deletions
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4
hw/src/trezor.rs
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@ -37,8 +37,8 @@ use trezor_sys::messages::{EthereumAddress, PinMatrixAck, MessageType, EthereumT
const TREZOR_VID: u16 = 0x534c;
const TREZOR_PIDS: [u16; 1] = [0x0001]; // Trezor v1, keeping this as an array to leave room for Trezor v2 which is in progress
const ETH_DERIVATION_PATH: [u32; 4] = [0x8000002C, 0x8000003C, 0x80000000, 0]; // m/44'/60'/0'/0
const ETC_DERIVATION_PATH: [u32; 4] = [0x8000002C, 0x8000003D, 0x80000000, 0]; // m/44'/61'/0'/0
const ETH_DERIVATION_PATH: [u32; 5] = [0x8000002C, 0x8000003C, 0x80000000, 0, 0]; // m/44'/60'/0'/0/0
const ETC_DERIVATION_PATH: [u32; 5] = [0x8000002C, 0x8000003D, 0x80000000, 0, 0]; // m/44'/61'/0'/0/0
/// Hardware wallet error.