Blockchain & Web3 Development Company in Dallas

Contract count and audit depth set the number on a Dallas-Fort Worth smart contract build. A scoped EVM token launch (ERC-20 with vesting, fee logic, and a simple staking contract) is a six to ten week engagement including Foundry test suite, Slither and Mythril passes, deployment scripts, and a Safe multisig setup. A mid-complexity protocol (custom AMM, lending market, RWA tokenisation contract, ERC-4337 paymaster) typically runs twelve to twenty-two weeks. A full DeFi or tokenisation platform adds a multi-contract system, frontend, indexer, admin console, and audit prep. Third-party audits from Trail of Bits, Spearbit, OpenZeppelin, ChainSecurity, or Halborn are paid directly to the audit firm and typically add USD $40,000 to $250,000 depending on scope and lines of code. We give fixed-fee proposals after a one-week paid discovery, not open T and M.

Texas applies the Money Services Act (Texas Finance Code Chapter 151) to most fiat on/off-ramps that custody customer funds, including USD-to-crypto exchanges, fiat-backed stablecoin issuers, and custodial wallets that move dollars. The Texas Department of Banking has issued guidance (Supervisory Memorandum 1037, last revised 2023) clarifying which digital asset business models trigger licensure. Non-custodial wallets, DEXs that never touch fiat, and pure smart-contract products generally fall outside, but the analysis is fact-specific. Codazz does not give legal advice — we coordinate with Texas counsel (Reed Smith Dallas, Holland & Knight Dallas, Winstead Dallas, and crypto-specialist boutiques) and build the product so the engineering does not contradict the regulatory posture. Federal BSA/FinCEN MSB registration usually runs in parallel for any custodial flow.

Texas HB 1666 (effective September 1, 2023) requires digital asset service providers that custody customer assets for Texas residents to maintain a customer-liability ratio of at least 1:1 and to publish periodic attestations. We implement Merkle-tree proof-of-reserves modelled on the post-FTX industry standards (Kraken, Coinbase, Binance attestations), with an on-chain commitment so each customer can verify their balance was included without revealing balances to other users. Liabilities are pulled from the exchange ledger, assets are proven on-chain via signed messages or zk-SNARK attestation for cold-wallet UTXOs, and the gap is reconciled in a public report. Armanino, Mazars, and Marcum have historically signed off on the financial-statement portion. The Texas Department of Banking does not currently certify a specific PoR methodology, so we document our approach against the AICPA SOC 1 framework so an examiner can read it without back-translation.

DFW-adjacent miners (Riot Rockdale, Riot Corsicana, the post-Argo Helios site, Marathon Texas facilities, smaller West Texas operators) compete on ERCOT real-time and ancillary-services revenue as much as on hashprice. We build telemetry stacks that pull from Foundry USA Pool, Antpool, Luxor, and Braiins APIs into a self-hosted MQTT or Kafka pipeline, store time-series in TimescaleDB or InfluxDB, and surface Four Coincident Peak (4CP) shutdown signals from ERCOT settlement-point pricing feeds. Demand-response automation cuts hashrate within 60 to 90 seconds when ERCOT scarcity prices exceed a configured threshold, with manual overrides for mining-pool payout cycles. Integration with battery storage and behind-the-meter generation (where present) is scoped separately. We have built against ASIC firmware from Bitmain (Antminer S19/S21), MicroBT (Whatsminer M50/M60), and Canaan.

Pick the chain by the buyer, not by founder aesthetics. JPMorgan Chase Plano contributes to the Onyx/Kinexys stack (Quorum, a permissioned EVM fork) and is the natural counterparty for any tokenised collateral or interbank settlement pilot. AT&T supply-chain and prepaid pilots usually land on Hyperledger Fabric or a permissioned EVM for ecosystem control. Toyota Motor North America Plano pilots have used Hyperledger and public EVM Layer 2s depending on the use case. For public-chain corporate tokenisation (tokenised treasuries, on-chain settlement of trade receivables), Base, Polygon PoS, Avalanche C-Chain, and Ethereum mainnet for the highest-value settlements are the realistic shortlist. Solana enters the conversation for high-throughput consumer payments. We help the client pick on three criteria: regulatory posture, counterparty fit, and engineering depth of the available auditor and wallet ecosystem.

Internal pre-audit is non-negotiable. We run Foundry test suites with branch coverage above 95 percent on critical paths, Slither and Mythril static analysis, Echidna or Foundry invariant fuzzing on state machines, and Manticore symbolic execution for sensitive functions. A written threat model covers reentrancy, integer overflow (Solidity 0.8+ helps but is not sufficient — unchecked blocks reintroduce risk), oracle manipulation, MEV and sandwich attacks, signature replay across chains, ERC-20 transfer-fee tokens breaking arithmetic, and admin key compromise. External audits from Trail of Bits, Spearbit, OpenZeppelin, ChainSecurity, Halborn, or Quantstamp are scoped by lines of code and complexity, typically two to six weeks. Post-deployment we set Tenderly or OpenZeppelin Defender alerts on anomalous flows and a Safe multisig with timelocks (24 to 72 hours typical) on privileged functions.

SB 1859 prohibits Texas state agencies from using a federal central bank digital currency for any payment to or from the agency, and clarifies that a CBDC is not legal tender for state purposes. The practical effect on private-sector design is narrow but real: any product that proposes to route state agency payments through a CBDC rail is non-viable in Texas, and product copy that conflates stablecoins with CBDCs creates legal review friction. We treat USDC, USDT, PYUSD, and bank-issued tokenised deposits (JPM Coin / Kinexys, Citi Token Services) as private-sector stablecoin and tokenised-deposit categories, fully separate from CBDC. Texas UCC Article 12 (adopted via HB 4474) governs digital asset transfers under Texas commercial law and is the relevant regime for most private-sector tokenisation work, not the CBDC posture.

A scoped RWA tokenisation pilot for a DFW fintech, RIA, or family office (tokenised treasuries, private credit, or real estate fractions) takes sixteen to twenty-eight weeks from kickoff to a Reg D 506(c) or Reg S launch, assuming counsel of record for the offering and a chosen transfer agent partner (Securitize, Tokeny, Polymath, or an in-house equivalent). Weeks 1 to 4 are regulatory scoping with counsel and the chosen issuer agent. Weeks 5 to 14 are smart contract development, frontend, and KYC/AML integration (Persona, Sumsub, Jumio, Civic). Weeks 15 to 20 are audit and remediation. Weeks 21 onward are testnet pilot, accredited investor onboarding, and mainnet launch. Public chain selection (Base, Ethereum, Avalanche, Polygon, Provenance) is driven by transfer-agent integration and target investor distribution, not engineering preference.