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Delegate call

Do caller need to declare same variable as in callee

When A delegate call B, A does not need to explicitly declare variables as in B. The value at the same storage slot as in B was changed.

Test contracts: /delegate-slot

• SlotCallee.sol declare variable number at slot 0.
• SlotCaller.sol do not declare any variable.
  • When Caller call Callee to update value of number, slot 0 in Caller is changed.

Do delegate call selfdestruct destroy caller or callee

Test contracts: /delegate-selfdestruct

• SelfdestructCallee: has the function selfdelete that call selfdestruct
• SelfdestructCaller: delegate call to selfdelete
  • The contract was destroyed is the caller

Upgradeable

Deploy StorageTransparent:

• Deployer: 0x7500d14588Aca06855b635B30D360C29575A8F27

• When deploy, 2 tx:

  1. Tx1: create contract 0x057A0BC4569a0f89AACD79e6f1eC74BCbB499da3: implemetation
  2. Tx2: create contract 0x10993CA8b451e3fb16bf792747805bdc5f9213A7: proxy address. Proxy contract call Implementation contract to do initialize function

• The address returned: 0x10993CA8b451e3fb16bf792747805bdc5f9213A7

• Verify contract, we found proxy admin: 0xD44EdeB629D717A0D572aa3998953Df636491549. Call it functions:

  • getProxyAdmin(0x10993CA8b451e3fb16bf792747805bdc5f9213A7) => 0xD44EdeB629D717A0D572aa3998953Df636491549
  • getProxyImplementation(0x10993CA8b451e3fb16bf792747805bdc5f9213A7) => 0x057A0BC4569a0f89AACD79e6f1eC74BCbB499da3
  • owner: 0x7500d14588Aca06855b635B30D360C29575A8F27

After verifying: only implementation verified, proxy contract did not

Upgrade StorageTransparent:

• Call 2 tx:
  1. Deploy new implementation contract at 0x4A40AF81437fDF812fF4c88f01447f9281e3dE39
  2. Call upgrade of proxyAdmin to update implementation address of Proxy contract

Deploy StorageUUPS:

• Deployer: 0x7500d14588Aca06855b635B30D360C29575A8F27

• When deploy, 2 tx:

  1. Tx1: create contract 0x34452629C72552792eba4a118e66916f6B43fC32: implemetation
  2. Tx2: create contract 0x5477f95E9b57297b136589ea5c79F9D56EDfbDf8: proxy address.

• Verify contract

Upgrade StorageUUPS:

• Call 2 tx:
  1. Deploy new implementation contract at 0xBC952cb995a7307c94b59D8a2306fcE2e838383d
  2. Call upgradeTo of Proxy to update implementation address of Proxy contract