Solana

In 2017 Anatoly Yakovenko sketched a ledger whose SHA-256 sequence could prove that time had elapsed and place messages in order. The white paper carried his name, but the working network emerged from divided roles: Raj Gokal joined in December 2017 to build the company, and former Qualcomm colleagues Greg Fitzgerald and Stephen Akridge arrived in early 2018.

Fitzgerald persuaded Yakovenko to replace the C prototype with Rust and released an early open-source implementation. Akridge argued that GPUs could verify signatures in parallel. Their company briefly used the name Loom, then chose Solana after the California beach where the Qualcomm colleagues had surfed.

Proof of History repeatedly hashes one output into the next. Because producing the sequence is sequential but checking recorded samples can be parallelized, a leader can insert transaction identifiers into an order other nodes can verify. It tells the network that event A came before event B and that computation occurred between them.

It does not vote a fork into truth. SOL-backed validators replay blocks and cast stake-weighted votes. Tower BFT uses the PoH clock to enforce increasing lockouts, making it costly for a validator to reverse an earlier vote. Mainnet Beta began on March 16, 2020 with this combination of clock, leader schedule, parallel runtime and proof-of-stake consensus.

Before launch, Solana reported more than 50,000 transactions per second on a GPU-equipped testnet of over 200 physically distinct nodes. The qualifiers are part of the fact. It was a 2019 testnet benchmark, and later RPC interfaces would explicitly separate all transactions from non-vote transactions over a sample window.

On September 14, 2021, bots around the Grape Protocol sale flooded the network. Memory exhaustion crashed validators, consensus stopped and the cluster remained offline for 17 hours. Operators coordinated a restart; the Foundation reported that no funds were lost. The recovery demonstrated social and operational coordination, while the halt showed that high peak capacity did not guarantee liveness under pathological load.

The next year brought different failures rather than one reusable diagnosis. April’s seven-hour outage followed roughly six million inbound transactions per second—attempted traffic, not completed user TPS. June exposed a durable-nonce bug. September combined duplicate blocks with a fork-selection edge case. In February 2024 a LoadedPrograms cache loop stopped finalization for about five hours; engineers shipped v1.17.20 and validators restarted from an agreed slot.

The Foundation’s November 2022 fact sheet documents 58,024,833 SOL in settled sales to FTX/Alameda: Foundation tranches of 4 million, 12 million and 34,524,833 SOL, plus a 7.5 million-SOL Solana Labs sale to Alameda Research Ventures. Another Labs sale of 61,853 SOL was marked not yet settled. The 12 million tranche was scheduled for monthly unlocks through September 2027, the 34,524,833 tranche was scheduled through January 2028, and the 7.5 million tranche was scheduled to unlock on March 1, 2025. Those dates made the bankruptcy estate’s exposure a supply question as well as a reputational one.

The Foundation separately disclosed about US$1 million of cash or equivalents trapped on FTX.com, no SOL custodied there, and holdings of roughly 3.24 million FTX shares, 3.43 million FTT and 134.54 million SRM. Those losses and token sales explain the ecosystem’s exposure without turning FTX into the operator of Solana consensus. The chain did not suffer a notable uptime or security incident during the bankruptcy week; projects, liquidity and confidence absorbed the shock instead.

The outages made software lineage a security question. In 2024 former Solana Labs engineers formed Anza and forked the original validator into Agave. Governance of the repository moved to a new firm, but Agave remained a continuation of the same code family; an organizational split alone could not remove common-mode defects.

Independent implementations were the deeper change. The August 13, 2026 Foundation changelog listed Agave v4.2.0, full Firedancer Mainnet v1.1.4 and hybrid Frankendancer Mainnet v0.1105.40200. The August 28 update then listed Firedancer Mainnet v26.08.2, Agave v4.3.0-beta.2 and a newer Frankendancer testnet build. Firedancer documentation explains that Frankendancer retains Agave components. These versions prove active alternatives, not equal stake adoption; new clients also bring their own bugs and operating work.

Every transaction pays SOL. Current documentation sets a 5,000-lamport base fee per signature, half burned and half paid to the block producer, plus an optional priority fee paid to that validator. Delegated SOL weights consensus votes and receives inflationary rewards after commission.

The published inflation path began at 8% annually, declines 15% each year and approaches 1.5%. That schedule is not a promised staking yield: the return also depends on how much SOL is active, validator uptime and commission. Solana’s engineering story therefore ends where it runs each day—with operators deciding which client to trust and holders deciding which validator receives their stake.