Purpose of this QIP is to initiate development of multi signature wallet support on QRL network, based on finalised specification.
Currently, QRL doesn’t have support to multi-signature wallet address. So to execute any transaction only a proof of signature is required either by the main address or the slave address. Thus the introduction of multi-signature wallet address will fill this gap and will allow multiple authorities to have a transaction from a single wallet once the consent has been established.
In order to create and spend from a multisig wallet new transaction types are required. multisig_create and multisig_spend are the two new transaction types which will be introducted to support multisig wallet.
multisig_create transaction type will be used to create a new multi sig wallet. It will have following input fields other than common transaction fields.
multisig_spend transaction type is to move funds from a multisig wallet to another address which could be a normal qrl address or another multisig address. It will have following input fields other than common transaction fields.
multisig_spend transaction will only be executed once minimum required threshold is met.
MultiSig addresses will be derived by following to maintain the standard QRL address format.
Prefix ‘Q’ + 3 bytes descriptor + hash of (descriptor + txn hash) + last 4 bytes of the hash of (descriptor + previous hash)
Descriptor Format (https://docs.theqrl.org/developers/address/)
|HF||0 .. 3||4||SHA2-256|
|SIG||4 .. 7||4||Signature Scheme|
|P1||8 .. 11||4||Height|
|P2||12 .. 15||4||Address Format|
|P3||16 .. 23||8||Not used|
So a multi sig address generated by multisig_create transaction having transaction hash 5a4c37ef7e5b7cc5a2a58ab730269ed8f4cbf08a005dc3508e31465535e1d6bb will be derived by following
Prefix = ‘Q’
Descriptor = 110000
SHA2_256(Descriptor+Txn hash) = 3674370317e1cac0ca13f896ab5b6472a261ba0d2b2961d3adba1b9060f6e8f7
SHA2_256(Descriptor+Prev Hash) = fe2088fb
MultiSig Address = Q1100003674370317e1cac0ca13f896ab5b6472a261ba0d2b2961d3adba1b9060f6e8f7fe2088fb
The introduction of multisig wallet on QRL Node will need a hard fork, as two new transaction will be introduced in it. Therefore, the changes will not be backward compatible.
Implementation of Multisig wallet is in progress.