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README.md.old3
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README.md.old3
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minimal upgradable proxy (slot 0)
---
### create upgradable proxy contract
```
# store logic address to slot of proxy contract
PUSH20 <logicAddress> [logicAddress]
RETURNDATASIZE [slot0 logicAddress]
SSTORE [] => storage(slot0 => logicAddress)
# return deployedCode
PUSH1 0x1a [0x1a]
PUSH1 0x21 [0x21 0x1a]
RETURNDATASIZE [00 0x21 0x1a]
CODECOPY [] ==> memory(0x00~0x1a: 0x21~0x3b(deployedCode1stPart))
PUSH1 0x1a [0x1a]
RETURNDATASIZE [00 0x1a]
RETURN
# proxy contract (deployedcode)
CALLDATASIZE [calldatasize]
RETURNDATASIZE [00 calldatasize]
RETURNDATASIZE [00 00 calldatasize]
CALLDATACOPY [] ==> memory(00~calldatasize => codedata)
RETURNDATASIZE [00]
RETURNDATASIZE [00 00]
RETURNDATASIZE [00 00 00]
CALLDATASIZE [calldatasize 00 00 00]
RETURNDATASIZE [00 calldatasize 00 00 00]
RETURNDATASIZE [00 00 calldatasize 00 00 00]
SLOAD [logicAddress 00 calldatasize 00 00 00]
GAS [gas logicAddress 00 calldatasize 00 00 00]
DELEGATECALL [result 00]
RETURNDATASIZE [returnDataSize result 00]
DUP3 [00 returnDataSize result 00]
DUP1 [00 00 returnDataSize result 00]
RETURNDATACOPY [result 00] => memory(00~RETURNDATASIZE => RETURNDATA)
RETURNDATASIZE [returnDataSize result 00]
DUP3 [00 returnDataSize result 00]
DUP3 [result 00 returnDataSize result 00]
PUSH1 0x18 [0x18 result 00 returnDataSize result 00]
JUMPI [00 returnDataSize result 00]
REVERT [result 00]
JUMPDEST [00 returnDataSize result 00]
RETURN [result 00]
```
* bytecode
replace `yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy` to a address of 20bytes before deploying contract
```
73yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy3d55601a60213d39601a3df3363d3d373d3d3d363d3d545af43d82803e3d8282601857fd5bf3
```
* deployedcode
wherein the bytes at indices 10 - 41 (inclusive) are replaced with the 32 byte slot of the master after created
```
363d3d373d3d3d363d3d545af43d82803e3d8282601857fd5bf3
```