| CIP | Title | Authors | Comments-URI | Status | Type | Created | License |
|---|---|---|---|---|---|---|---|
11 |
Staking key chain for HD wallets |
Sebastien Guillemot <sebastien@emurgo.io>, Matthias Benkort <matthias.benkort@iohk.io> |
Active |
Standards |
2020-11-04 |
CC-BY-4.0 |
Starting with the Shelley hardfork, Cardano makes use of both the UTXO model and the account model. To support both transaction models from the same master key, we allocate a new chain for CIP1852
The term "account" is unfortunately an overloaded term so we clarify all its uses here
BIP44 uses the term "account" as one derivation level to mean the following
This level splits the key space into independent user identities, so the wallet never mixes the coins across different accounts. To differentiate this from other usage, we sometimes refer to it as an
account'(the bip32 notation) or a BIP44 Account.
Blockchains like Ethereum does not use the UTXO model and instead uses the Account model for transactions.
Generally it's best to only use a cryptographic key for a single purpose, and so it's best to make the staking key be separate from any key used for UTXO addresses.
Recall that CIP1852 specifies the following derivation path
m / purpose' / coin_type' / account' / chain / address_index
We set chain=2 to indicate the staking key chain. Keys in this chain MUST follow the accounting model for transactions and SHOULD be used for reward addresses
We RECOMMEND wallets only use address_index=0 for compatibility with existing software. This also avoids the need for staking key discovery.
Wallets that use multiple staking keys are REQUIRED to use sequential indexing with no gaps. This is to make detection of mangle addresses (addresses where the payment key belongs to the user, but the staking key doesn't) easier.
Note: an observer looking at the blockchain will be able to tell if two staking keys belong to the same user if they are generated from the same wallet with different address_index values because the payment keys inside the base addresses will be the same.
recovery phrase
prevent company field green slot measure chief hero apple task eagle sunset endorse dress seed
private key (including chaincode) for m / 1852' / 1815' / 0' / 2 / 0
b8ab42f1aacbcdb3ae858e3a3df88142b3ed27a2d3f432024e0d943fc1e597442d57545d84c8db2820b11509d944093bc605350e60c533b8886a405bd59eed6dcf356648fe9e9219d83e989c8ff5b5b337e2897b6554c1ab4e636de791fe5427
reward address (with network_id=1)
stake1uy8ykk8dzmeqxm05znz65nhr80m0k3gxnjvdngf8azh6sjc6hyh36
This CIP is licensed under CC-BY-4.0