A Guide to Solana Development for Ethereum Developers

This guide explores the core differences between building on Ethereum and Solana, providing a clear pathway for developers to transition between these ecosystems. For those with an Ethereum background, Solana presents a distinct architectural approach and a unique toolset. This resource equips you with the foundational knowledge and practical steps needed to start developing on Solana effectively.

Understanding Solana's Core Architectural Differences

The most significant shift for Ethereum developers is Solana's account model. This design is intentional, engineered to leverage the multiple cores in modern hardware. As computing continues to offer more cores at lower costs, Solana's architecture parallelizes transaction processing. This fundamental difference enables optimizations like local fee markets and vastly increased throughput.

The Account Model: A Paradigm Shift

On Solana, everything is an account—a data object with specific modification rules. This includes smart contracts, known as "programs." Unlike Ethereum, where a smart contract bundles its execution logic and state storage, Solana programs are stateless. They contain only the logic and must have all necessary state passed into them via accounts for execution.

Ethereum Example: Stateful Contract
A typical Solidity counter contract maintains its own state variable.

contract Counter {
    int private count = 0;
    function incrementCounter() public { count += 1; }
    function getCount() public view returns (int) { return count; }
}

Solana Example: Stateless Program
In Solana (using the Anchor framework in Rust), the state is held in a separate account.

#[program]
pub mod counter_anchor {
    use super::*;
    pub fn increment(ctx: Context<Increment>) -> Result<()> {
        ctx.accounts.counter.count += 1;
        Ok(())
    }
}

#[derive(Accounts)]
pub struct Increment<'info> {
    #[account(mut)]
    pub counter: Account<'info, Counter>,
}

#[account]
pub struct Counter {
    count: u64,
}

Here, the increment function receives a counter account and modifies the count value stored within it. The program itself holds no persistent state.

Key Benefits of the Solana Model

This separation of logic and state offers major advantages, most notably program reusability. On Ethereum, deploying a new ERC-20 token requires redeploying the entire contract code. On Solana, the Token Program is deployed once. New tokens are created by initializing new mint accounts that reference this single, universal program. This eliminates redundant code deployment and associated costs. You can even create a new token with a single CLI command using the Solana Program Library, no Rust coding required.

👉 Explore advanced token creation methods

Local Fee Markets and Parallel Execution

Solana's parallel execution enables localized fee markets. Transactions are processed concurrently based on the accounts they interact with. If one application, like a popular NFT mint, experiences high demand, only transactions involving its specific accounts face higher fees. Other network activities, such as a USDC transfer, remain unaffected by this localized congestion and continue to enjoy low, predictable costs. This contrasts sharply with Ethereum's global fee market, where one popular application can increase gas costs for everyone.

A Deep Dive into Solana's Transaction Mechanics

How Fees Are Structured

Solana fees are divided into three components:

• Base Fee: A fixed cost per signature in a transaction (5,000 lamports each). This creates economic pressure on the network's most compute-intensive operation: signature verification. Half of this fee is burned; the other half rewards validators.
• Priority Fee: An optional fee to prioritize a transaction, calculated as compute units * compute unit price. Similar to gas on Ethereum, compute units measure a transaction's resource consumption. Like the base fee, priority fees are split between burning and validator rewards.
• Rent: A deposit, not a fee, required to maintain account storage on the network. It's based on the amount of data stored. Crucially, this SOL can be recovered by closing the account and freeing the storage space.

Transaction Composition and Validation

A Solana transaction comprises:

• Instructions: The smallest unit of execution logic, akin to individual function calls in a smart contract.
• Accounts: An array of accounts the instructions will read from or write to.
• Signatures: One or more signatures authorizing the transaction.
• Recent Blockhash: A recent block identifier used to prevent transaction replay and ensure timeliness.

A single transaction can contain multiple instructions, allowing developers to chain operations atomically without building a custom smart contract. If any instruction fails, the entire transaction reverts, and only the transaction fee is paid. Transactions are valid for approximately 150 blocks after the blockhash is retrieved, preventing old transactions from being executed much later.

Understanding Transaction Limitations

Solana imposes compute limits to maintain network performance:

Additional caps prevent any single account from being overloaded with writes in a single block, protecting the integrity of local fee markets. Furthermore, the call depth limit is set to 4, effectively eliminating reentrancy attacks—a common security concern in Ethereum development.

The Absence of a Mempool

Solana does not have a traditional mempool. Instead, validators forward transactions to the next few leaders in the scheduled sequence. This design reduces the overhead of gossiping transaction pools across the entire network. Priority fees are still used to order transactions for processing by these leaders.

Navigating the Solana Developer Ecosystem

Programming Languages and Tools

While Ethereum development is dominated by Solidity, Solana smart contracts are primarily written in Rust. The Anchor Framework provides a suite of tools that make Rust development more accessible for EVM developers by abstracting away common complexities.

For teams wishing to stay with Solidity, Neon EVM offers a compatibility layer, allowing you to deploy Solidity code on Solana using familiar tools like Hardhat or Foundry. However, this approach may limit composability with native Solana programs.

On the client side, robust SDKs are available for popular languages, offering comparable functionality to Ethereum's web3.js or ethers.js libraries.

Finding and Verifying Smart Contract Code

In the EVM world, Etherscan is the standard for verifying contract code. On Solana, this capability is newer. Explorers like Solana FM allow you to view the code of a program if it was deployed using a verifiable build process. You can typically find a "Verification" tab on a program's page to inspect its source code and assess its safety before interaction.

Key Development Differences: PDAs, Upgradability, and Signers

Several concepts require a mental model shift:

• Program Derived Addresses (PDAs): PDAs replace mappings for storing key-value pairs on-chain. They are deterministically derived addresses that do not have a private key, allowing programs to sign for them. They are used to create structured data accounts owned by a program.
• Default Upgradability: Solana programs are upgradeable by default by the deployer. A CLI command can make a program immutable, after which it can never be changed, similar to a finalized contract on Ethereum.
• Multiple Signers: There is no direct equivalent to msg.sender. A Solana transaction can have multiple signers. Your logic must check which specific accounts have signed the transaction, as the transaction sender may not be the fee payer.

Practical Migration: Porting a Voting DApp from Ethereum to Solana

Let's translate a simple Ethereum voting contract to Solana to see these concepts in action.

Original Solidity Contract:

contract Voting {
    mapping (bytes32 => uint256) public votesReceived;
    bytes32[] public candidateList;

    constructor(bytes32[] memory candidateNames) { candidateList = candidateNames; }

    function voteForCandidate(bytes32 candidate) public {
        require(validCandidate(candidate));
        votesReceived[candidate] += 1;
    }
    function totalVotesFor(bytes32 candidate) public view returns (uint256) {
        require(validCandidate(candidate));
        return votesReceived[candidate];
    }
    function validCandidate(bytes32 candidate) public view returns (bool) {
        for(uint i = 0; i < candidateList.length; i++) {
            if (candidateList[i] == candidate) return true;
        }
        return false;
    }
}

Key Steps for the Solana Program (Anchor):

1. Ownership Check: Implement an onlyOwner pattern using a require_keys_eq! macro to secure the initialization function.
2. State Management: Replace the mapping with a Candidate account struct and use PDAs. The seed for the PDA is the candidate's name.
3. Logic: The vote_for_candidate instruction increments the votes_received field in the respective Candidate PDA account.
4. Validation: The validCandidate check is handled naturally; voting for a non-existent PDA (candidate) will cause the transaction to fail.
5. Reading Data: The totalVotesFor function is implemented off-chain by querying the Candidate account data using a client-side script.

This practical exercise demonstrates how core Ethereum concepts map to Solana's architecture, using PDAs for state management and off-chain data retrieval.

👉 Discover more strategies for cross-chain development

Frequently Asked Questions

What is the biggest conceptual difference for an Ethereum developer learning Solana?
The most significant shift is understanding Solana's stateless program and separate account model. On Ethereum, contract logic and state are combined. On Solana, programs (smart contracts) are pure logic, and all state is stored in separate accounts that are passed into the program during execution. This enables parallel processing and reusability.

How do I handle something like a mapping or an array in Solana?
You use Program Derived Addresses (PDAs). A PDA is deterministically generated from a set of seeds (e.g., a string "vote" and a user's public key) and the program ID. This creates a unique address where data can be stored and retrieved, functionally similar to a key-value mapping but implemented differently.

Are Solana programs upgradeable?
Yes, by default, the program deployer can upgrade the code. This is similar to using a proxy pattern on Ethereum but is built-in. Developers can choose to finalize a program, making it immutable permanently, which is a recommended step for final production deployments.

Is there a direct equivalent to msg.sender in Solana?
No. A Solana transaction can have multiple signers. You must check the specific signer accounts within your program logic to implement authentication. The Signer account type in Anchor validates that the account signed the transaction.

What tools can I use to test and deploy Solana programs?
The Solana CLI is the core tool for deployment. For testing, you can use Solana Playground (an online IDE) or set up a local development environment with a test validator. The Anchor Framework provides a comprehensive suite for testing Rust programs, similar to Foundry/Hardhat.

How do gas fees compare between Ethereum and Solana?
Solana's fees are typically fractions of a cent due to its high throughput and local fee markets. While Ethereum's fees can be high and volatile during network congestion, Solana's fees remain low and predictable for transactions not competing for specific, congested resources.