Presale & Crowdsale Contracts
Multi-stage presale smart contracts with per-stage pricing, soft and hard caps, min/max contribution limits, whitelist and Merkle-proof allowlists, referral payouts and automatic claim or refund logic.
Solidity · Rust · EVM & Beyond
Smart Contract Development Company
We are a smart contract development company that writes audited Solidity and Rust contracts for presales, token vesting, staking and custom tokens — gas-optimized, covered by fuzz and invariant tests, and prepared for third-party audit from the first commit. You get verified source on-chain and full ownership handed to your multisig.
Standard contracts from $499, deployed in 24–48h · Fixed-price quotes within 24 hours · NDA on request
0smart contracts deployed to mainnet
0exploits across our contract stack
0test coverage on our core presale & vesting stack
0blockchains we deploy and verify on
01 — Contracts we write
Solidity development services for every launch stage
From the token itself to the presale that funds it and the staking that retains holders — one team writes, tests and deploys the entire contract layer.
Token Vesting & Locking
On-chain token vesting contracts with cliffs, linear or milestone release, revocable grants and team/advisor locks — the schedule investors verify on the explorer instead of trusting a spreadsheet.
Staking & Reward Distribution
Staking smart contracts with flexible and locked pools, time-weighted reward accrual, early-exit penalties and auto-compounding — reward math that stays solvent no matter how many wallets stake.
ERC-20 / 721 / 1155 Tokens
Standards-compliant tokens with custom logic: transfer taxes, burn and reflection mechanics, supply caps, permit (EIP-2612) approvals, anti-bot launch guards and role-based minting.
Upgradeable & Proxy Patterns
UUPS and Transparent proxy implementations with storage-layout checks, initializer protection and a timelocked admin — so you can ship fixes without giving anyone a silent upgrade backdoor.
Custom DeFi Mechanics
Fee routers, buyback-and-burn engines, bonding curves, revenue sharing and treasury automation — modeled first, then implemented with invariant tests that prove the math holds under attack.
02 — Engineering standards
Written like the audit already started
Most contract exploits trace back to shortcuts taken weeks before launch. Our workflow removes the shortcuts.
The engineering bar on every contract
Whether it's a 24-hour token deployment from our premade base or a multi-week custom DeFi protocol, the same standards apply. Nothing reaches mainnet on our watch without passing all of them.
- Foundry & Hardhat test suites — unit tests for every state transition, mainnet-fork tests for integrations
- Fuzz & invariant testing — randomized inputs and protocol invariants (supply, solvency, access) checked across thousands of runs
- Static analysis — Slither and solhint in CI; every warning resolved or documented, never silenced
- Full NatSpec documentation — so auditors, integrators and your next dev team read intent, not just code
- Gas profiling & optimization — storage packing, custom errors, calldata over memory, unchecked math where provably safe
- Multisig + timelock ownership — privileged functions behind your Safe multisig, upgrades behind a public timelock
/// @notice Tokens claimable by `beneficiary` right now. function releasable(address beneficiary) public view returns (uint256) { Grant memory g = grants[beneficiary]; if (block.timestamp < g.start + g.cliff) return 0; uint256 elapsed = block.timestamp - g.start; uint256 vested = elapsed >= g.duration ? g.total : (g.total * elapsed) / g.duration; // Never releases more than vested minus claimed. return vested - g.released; }
# Audit readiness — before handing off [x] Frozen scope, tagged commit, locked deps [x] 100% branch coverage on core paths [x] Slither: 0 high / 0 medium open findings [x] Invariants documented per contract [x] Deployment scripts + testnet addresses [x] Threat model & privileged-role matrix [x] NatSpec on every external function // Clean handoff = shorter audit = lower bill.
Audit preparation that saves weeks and thousands
Auditors bill by scope and time. Code that arrives with tests, documentation and a clean static-analysis report gets audited faster, cheaper and with fewer re-review rounds. We prepare every codebase as if CertiK, Hacken or SolidProof opens it tomorrow.
- When you need one — any contract holding third-party funds: presales, staking pools, treasuries. A simple standard token can often launch on internal review alone
- What it costs — typically five figures for a presale or staking suite at a reputable firm; complex protocols run higher
- What we handle — auditor selection and scheduling, scoping calls, answering findings, implementing fixes and verifying the final report matches deployed bytecode
- What you get — a public audit badge investors actually check before contributing to a presale
03 — How we work
From spec to verified mainnet contract
A fixed process with a fixed price. Security decisions happen at the start, not as patches at the end.
01
Specification & threat modeling Day 1
We turn your requirements into a written spec: state machines, roles, invariants and failure modes. Every privileged function gets a documented owner and a reason to exist — this document later becomes the auditor's map.
02
Implementation with tests Days 2–7
Contracts are written in Solidity (or Rust for Solana) on OpenZeppelin foundations, with unit, fork, fuzz and invariant tests growing alongside the code — not bolted on after.
03
Internal review & static analysis Week 2
A second senior engineer reviews every line against the threat model. Slither, solhint and gas profiling run in CI; findings are fixed, re-tested and logged in the audit-readiness report.
04
External audit coordination Optional
For contracts that will hold investor funds, we scope and schedule a third-party audit with CertiK, Hacken or SolidProof, respond to findings, ship fixes and get the final report published under your project's name.
05
Deployment, verification & handover Launch
Scripted deployment to mainnet, exact-match source verification on the explorer, and ownership transferred to your multisig with a timelock on any upgrade path. You leave with the repo, the keys and zero dependencies on us.
04 — Know what you're deploying
Custom contract stack vs. the shortcuts
A forked contract or a no-code deployer gets you on-chain fast — and leaves you explaining inherited bugs, bloated gas and locked-in fees to your investors later.
| Our contract stack | Forked / copied contract | No-code deployer | |
|---|---|---|---|
| Security review | Internal review + audit prep | Inherits unknown bugs | Generic, unreviewed for you |
| Custom logic | Anything you can spec | Whatever the fork had | Preset options only |
| Gas cost | Profiled & optimized | Legacy patterns, dead code | One-size-fits-all overhead |
| Verified source | Exact-match + NatSpec | Often mismatched or missing | Usually verified |
| Upgrade path | UUPS / Transparent + timelock | Rarely — redeploy & migrate | None |
| Ownership handover | Your multisig, no backdoors | Hidden owner functions common | Platform retains hooks / fees |
| Support after launch | Same team, same-day | You're on your own | Ticket queue at best |
05 — Guide
What does a smart contract development company do?
A smart contract development company designs, writes, tests and deploys the on-chain code that moves your token and your investors' money. That covers more than typing Solidity: a serious team specifies the system first, models the ways it can be attacked, writes the contract against those constraints, proves behavior with fuzz and invariant tests, and only then deploys — verified, documented and owned by your multisig. On EVM chains a deployed contract is immutable unless you planned an upgrade path, so mistakes are not patched, they are exploited. That single fact is why contract engineering is priced and staffed differently from ordinary web development.
In practice the work clusters around launches: a token contract, a presale website and its crowdsale contract, vesting for the team and early rounds, and a staking platform to retain holders after listing. We build each piece as part of one coherent system, so the presale knows about the vesting schedule and the staking pool knows about the token's tax logic.
How much does smart contract development cost?
Pricing follows complexity and risk. A standard token contract deployed from our premade, audited base starts at $499 — taxes, supply caps and anti-bot guards are configured, not rebuilt, and standard deployments go live within 24–48 hours; see our dedicated token development service for details. Presale, vesting and staking suites, where the contract custodies investor funds and needs deeper testing, range from $999 to $4,900, with fully custom contracts taking 1–2 weeks. Novel DeFi mechanics — bonding curves, custom reward math, protocol treasuries — are quoted per spec and land higher, because the math has to be modeled and proven before it is implemented. A third-party audit, when the contract holds public money, is a separate line item — typically five figures — paid to the audit firm.
Be wary of quotes far below these ranges. They usually mean a copied contract with the variable names changed — no tests, no gas optimization, and whatever vulnerabilities the original carried.
Audit vs. review — what your investors expect
An internal review, static analysis and a strong test suite catch most defects — and every contract we ship gets all three. An independent audit from CertiK, Hacken or SolidProof adds an outside adversary and a public report, and for a public raise that badge has become table stakes: experienced presale investors check for it before connecting a wallet. Our position is simple. Contracts that hold third-party funds should be audited; a standard token behind a well-tested stack often doesn't need one on day one. We prepare every codebase to audit-ready standard regardless, so adding the badge later is a scheduling decision, not a rewrite. And if your roadmap extends past launch into a full dApp, the same audited contract layer carries straight into it.
06 — FAQ
Smart contract development, answered
A standard ERC-20 or BEP-20 token contract deployed from our premade, audited base starts at $499. Presale, vesting and staking contract suites range from $999 to $4,900 depending on mechanics and chains. Novel DeFi systems — bonding curves, custom reward math, cross-chain logic — are quoted individually and cost more. Every quote is fixed-price and includes tests, deployment and source verification.
Standard deployments from our premade, audited base — token contracts and stock presale, vesting or staking suites — go live within 24–48 hours. Custom contracts typically take 1–2 weeks including fuzz testing and internal review; complex DeFi protocols take longer. If you book a third-party audit, add the auditor's queue time — usually 1–4 weeks — which we schedule in parallel with development.
We perform internal security review, static analysis with Slither, and fuzz plus invariant testing on every contract — but an internal review is not a substitute for an independent audit. For public raises we coordinate third-party audits with CertiK, Hacken or SolidProof, handle the auditor's questions, and fix every finding before mainnet deployment.
Solidity for all EVM chains — Ethereum, BNB Chain, Polygon, Arbitrum, Base, Optimism and Avalanche — plus Rust for Solana programs and FunC/Tact for TON. Our tooling is Foundry and Hardhat with OpenZeppelin libraries as the base layer, so the same contract suite can be deployed and verified across 14 networks.
Yes. We regularly inherit half-finished or buggy codebases from freelancers: we review the code, reproduce the issue in a test, then patch or refactor. If the contract is already deployed and not upgradeable, a fix means redeploying a corrected version and migrating state — we script that migration and verify balances match before switchover. The same applies to staking platforms built on flawed reward math.
Always. Every contract we deploy is source-verified on Etherscan, BscScan, Arbiscan, Basescan or the relevant explorer, with exact-match compiler settings and full NatSpec documentation. Investors can read the code, check ownership and confirm vesting schedules themselves — unverified bytecode is a red flag no serious presale can afford.
You do — completely. The repository, deployment scripts and tests are transferred to your organization, and contract ownership is handed to your multisig at delivery. We retain no admin keys, upgrade rights or backdoors. For upgradeable contracts we recommend a timelock in front of the proxy admin so every upgrade is publicly visible before it executes.
Ready when you are
Ship contracts your auditors will compliment
Send us your spec or your tokenomics. We'll reply with a fixed price, a timeline and a concrete security plan — usually within a few hours.
Free consultation · Fixed-price quotes · NDA on request