Multisig helper functions

[arjanz]

To initiate and finalize multisig extrinsics, the following helper functions are available:

# Define the multisig account by supplying its signatories and threshold
keypair_alice = Keypair.create_from_uri('//Alice', ss58_format=substrate.ss58_format)

multisig_account = substrate.generate_multisig_account(
    signatories=[
        keypair_alice.ss58_address, 
        '5FHneW46xGXgs5mUiveU4sbTyGBzmstUspZC92UhjJM694ty', 
        '5FLSigC9HGRKVhB9FiEo4Y3koPsNmBmLJbpXg2mp1hXcS59Y'
    ], 
    threshold=2
)

Then initiate the multisig extrinsic by providing the call and a keypair of one of its signatories:

call = substrate.compose_call(
    call_module='System',
    call_function='remark_with_event',
    call_params={
        'remark': 'Multisig test'
    }
)

extrinsic = substrate.create_multisig_extrinsic(call, keypair_alice, multisig_account, era={'period': 64})
receipt = substrate.submit_extrinsic(extrinsic, wait_for_inclusion=True)

Then a second signatory approves and finalizes the call by providing the same call to another multisig extrinsic:

# Define the multisig account by supplying its signatories and threshold
keypair_charlie = Keypair.create_from_uri('//Charlie', ss58_format=substrate.ss58_format)

multisig_account = substrate.generate_multisig_account(
    signatories=[
        keypair_charlie.ss58_address, 
        '5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY', 
        '5FLSigC9HGRKVhB9FiEo4Y3koPsNmBmLJbpXg2mp1hXcS59Y'
    ], 
    threshold=2
)

extrinsic = substrate.create_multisig_extrinsic(call, keypair_charlie, multisig_account, era={'period': 64})
receipt = substrate.submit_extrinsic(extrinsic, wait_for_inclusion=True)

The call will be executed when the second and final multisig extrinsic is submitted, condition and state of the multig will be checked on-chain during processing of the multisig extrinsic.