We focus on the relationship among SLOAD opcode and YUL’s offset and slot codes. We will learn how to use the Sload opcode and YUL’s offset and slot codes together. We have 4 values . Once our values are uint256, they cover one slot in the storage. We use…

We focus on SLOAD Opcode and how storage works in EVM. SLOAD Storage is the area where we store state variables on EVM. It is not a temporary space like Memory. This space has (2²⁵⁶)-1 slots, each slot is 32 bytes (256 bits). If a state variable is uint256, 1 slot…

We start this section with memory, one of the most important databases of EVM. I try to explain how MSTORE opcode is working. MSTORE Opcode First you should read the memory layout page. offset: offset in the memory in bytes. (Byte position on the memory where you will start placing the value) …

SHA3, CALLDATA, CALLDATALOAD, CALLVALUE, CODESIZE and GASLIMIT new opcodes. Today, in the fifth lesson of our series, as you can guess, we will dive into more boring and difficult opcode topics. SHA3 Opcode Keccak256 encrypts the desired(we want it) part of the data in memory. For this reason, we must first save…

We are continuing to progress in opcode business. In this lesson you will learn many new opcodes. These are MOD, EXP, LT,GT, EQ, ISZERO, SHL,SHR and BYTE MOD Opcode It gives the remaining value in the division operation on the stack. First we enter the value 2 and then the value 7…

We dealt with MSTORE8, MLOAD and Return opcodes in this lesson. MSTORE8 We use the MSTORE opcode for storing 32-byte value to write in the memory. However MSTORE8 opcode is used for storing 1-byte value to write in the memory. We can write 32 bytes and 1 byte of data to…

Time to learn the bytecode introduction block of the all solidity contracts. What is the mystery behind this fucking 3 opcodes ? PUSH1 0x80 PUSH1 0x40 MSTORE When you start to analyse a contract, you will see that the opcodes start as follows. PUSH1 0x80 PUSH1 0x40 MSTORE We can…

We will perform various manipulations on the largest number on the EVM. Thanks to this study, you will better understand the working (clock) logic of EVM. The largest maximum value and ADD Opcode We have “1” in the stack and we add the largest maximum value you can send to EVM is 32 bytes sized value. …

It’s time to learn what the basic opcodes are. If you learn these opcodes, you can dominate the long bytecode sequences. You would like to understand ADD, SUB, POP,DIV and MUL opcodes. Welcome ! Each opcode will be shown both visually and in code implementation. What is the LIFO ? First of all, you should…