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add DapperStorageRent to a few templates, update tests#98

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andrewdamelio wants to merge 2 commits intomainfrom
add-DapperStorageRent-to-tempates
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add DapperStorageRent to a few templates, update tests#98
andrewdamelio wants to merge 2 commits intomainfrom
add-DapperStorageRent-to-tempates

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@andrewdamelio
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DapperStorageRent -> https://github.com/dapperlabs/dapper-flow-contracts/tree/main/dapper-storage-rent

Adding DapperStorageRent to a few templates for later useage when we launch DapperStorageRent.

@andrewdamelio andrewdamelio requested a review from a team as a code owner November 15, 2022 13:40
@andrewdamelio andrewdamelio self-assigned this Nov 15, 2022
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@satyamakgec satyamakgec left a comment

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I think we need need to add test cases for the dapperStorageRent contract and need transactions for the same as well.

@@ -0,0 +1,77 @@
import FungibleToken from "./FungibleToken.cdc"

pub contract PrivateReceiverForwarder {

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I don't understand why we need this contract? can't we directly transfer the funds to the address capability? because it also holds the capability for the same.

Maybe I am missing something here ?

}

// 0.06 = 6MB of storage, or ~20k NBA TS moments
privateForwardingSenderRef!.sendPrivateTokens(address,tokens:<-vaultRef!.withdraw(amount: REFUEL_AMOUNT))

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This doesn't make sure that the user would receive the 0.06 FLOW in the given account as the user can have a different receiver capability of different accounts in the private forwarder resource.

/// @param batchSize: Int to set the batch size of the cleanup
pub fun cleanExpiredRefilledAccounts(_ batchSize: Int) {
var index = 0
while index < batchSize && self.RefilledAccounts.length > index {

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This is incorrect as it would only allow running the loop half times than the given batchSize.

If the given batchSize is 10, this loop will run 5 times because of self.RefilledAccounts.length also decreases when you remove the index.

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nice catch!! working on a fix

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@satyamakgec updated method to the below, thoughts?

  pub fun cleanExpiredRefilledAccounts(_ batchSize: Int) {
    var index = 0
    var refilledAccountsToCleanup: [Address] = [];
    var refilledAccountsLength = self.refilledAccounts.length
    while index < batchSize && index < refilledAccountsLength {
      if self.refilledAccountInfos[self.refilledAccounts[index]] != nil &&
        getCurrentBlock().height - self.refilledAccountInfos[self.refilledAccounts[index]]!.atBlock > self.refillRequiredBlocks {
        refilledAccountsToCleanup.append(self.refilledAccounts[index])
      }
      index = index + 1
    }

    for account in refilledAccountsToCleanup {
        if let idx = self.refilledAccounts.firstIndex(of: account) {
          self.refilledAccounts.remove(at: idx)
          self.refilledAccountInfos.remove(key: account)
        }
    }
  }

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We can avoid the below for loop as we can move the removed statements of the array in the while loop. We need only these 2 statements.

var refilledAccountsLength = self.refilledAccounts.length
while index < batchSize && index < refilledAccountsLength {

}

// If the user is below the threshold PrivateReceiverForwarder will send 0.06 Flow tokens for about 6MB of storage
if high - low < self.StorageRentRefillThreshold {

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Remember that the value of self.StorageRentRefillThreshold should be greater than the txn cost of the tryRefil transaction.


/// DapperStorageRent
/// Provide a means for accounts storage TopUps. To be used during transaction execution.
pub contract DapperStorageRent {

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Is it essential to have the prefix of the name Dapper?

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No, not essential, but was thinking it gave some good context to its relationship to BloctoStorageRent

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Hmm.. I think it is better to remove and not use the company name as the prefix. Instead, we can go with a generic contract name to avoid some "XYZ" reasons. We can rename it to Refueler or something like that.

@andrewdamelio
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@satyamakgec thanks Satyam -- i'll go through these today and get back to you with some feedback also

@onflow onflow deleted a comment from satyamakgec Dec 2, 2022
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2 participants