[Post HCU] Upgrade Migration contract on the service account and deploy AccountV2Migration

[janezpodhostnik]

Context

A stub of the Migration contract should already exist on the service account because of #358. After the HCU the migration contract needs to be updated, but before it can be updated its dependency AccountV2Migration needs to be deployed to the service account.

After this we can enable on the fly migrations by setting the batch size on the AccountV2Migration contract (admin).

Transactions

Deploy AccountV2Migration

• transaction: deploy contract
• authorizer: service account
• arguments: the contract from https://github.com/onflow/flow-go/blob/4ce667d618ffa2ad54013afc8858473a361745a4/fvm/accountV2Migration/AccountV2Migration.cdc

Upgrade Migration

• transaction: upgrade contract
• authorizer: service account
• arguments: the contract from https://github.com/onflow/flow-go/blob/4ce667d618ffa2ad54013afc8858473a361745a4/fvm/migration/Migration.cdc

(Optional) Set AccountV2Migration migration batch size

• transaction:

import AccountV2Migration from 0xe467b9dd11fa00df

transaction(batchSize: UInt64, maxAddressIndex: UInt64) {
    prepare(signer: auth(Storage) &Account) {
        let admin = signer.storage
            .borrow<&AccountV2Migration.Admin>(
                from: AccountV2Migration.adminStoragePath
            )
            ?? panic("missing account V2 migration admin resource")
        admin.setBatchSize(batchSize)
        admin.setMaxAddressIndex(maxAddressIndex)
    }
}

• authorizer: service account
• arguments: batchSize and maxAddressIndex provided by @j1010001

[j1010001]

Updated Tx for triggering the migration:

import AccountV2Migration from 0xe467b9dd11fa00df

transaction {
    prepare(signer: auth(Storage) &Account) {
        let admin = signer.storage
            .borrow<&AccountV2Migration.Admin>(
                from: AccountV2Migration.adminStoragePath
            )
            ?? panic("missing account V2 migration admin resource")
        admin.setBatchSize(BATCH_SIZE)
        admin.setMaxAddressIndex(ACCOUNT_ID)
    }
}

[j1010001]

I'll provide the parameters before we start of the HCU.
We will likely set the batch size twice - first time to 10, monitor the impact on the system transaction duration and then increase it to 100.

[janezpodhostnik]

updated the transaction @j1010001