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Series
In this series , I will be covering topics related to Storage and Memory in Solidity
Let’s first have a look at the Code contract Demo{ uint256 a 1234 // slot 0 uint8 b = 0x12; // slot 1 uint8[6] c = [1,2,3,4,5,6]; // line 4 (slot 2) uint256[2] d = [10,20] // line 5 slot(3 & 4) function getSlotvalue(uint slot) public...
When Storing Dynamic type data , We don’t explicitly store the data in the next immediate slot, instead we only store the address of the slot where the element of that index is , In simpler words we are basically storing the “Pointer” to the actual a...
Let’s look at the architecture of the Memory in EVM. Scratch Space : Ephemeral space to write values ( used for instance by the sha3 opcode) Free Memory Pointer : It contains the address of the last byte accessed in memory . Memory never gets clean...
Alright Let’s Continue from where we left , Previous One : Demystifying Memory in EVM (Part I) Memory Initialization When a contract is executed , the EVM initializes a free memory pointer to 0×80. This is done to provide some space for stack operati...
Introduction Yul is an intermediate language that can be used with Solidity or as a standalone language . It is particularly useful for writing optimized Smart Contract Lets look at some Coding Examples { // Declare variables without specifying t...
Reading a Slot in Yul Lets start with a Coding Example contract offsetAndShifting{ uint128 public a = 22; uint96 public b =15; uint16 public c = 8; uint8 public d = 1; function readValueBySlot(uint256 slot) external view return(b...
