Hedera Set September 16 for Mainnet Access and Opened Mirror-Node Code

Hedera Hashgraph announced on August 29, 2019 that it would open its mainnet beta to the public on September 16, allowing users to create accounts and developers to build applications on the network. The company also said it had open-sourced its mirror-node software, giving outside operators a way to retain and query the ledger’s transaction history without participating in consensus.

The combination mattered because it separated three concepts that cryptocurrency projects often compressed into a single launch claim: public access, access to source code and control of consensus. Hedera was preparing to let the public use its ledger, and it had opened an important data component, but its consensus nodes would remain permissioned.

Public access was not permissionless consensus

Hedera described its network on August 29 as public but permissioned. Anyone would be able to build after the scheduled opening, while only approved organizations could operate the nodes that ordered transactions and maintained consensus. The company presented unrestricted node operation as a future objective rather than a feature available on August 29 or promised for September 16.

Mirror nodes occupied a different role. Hedera said they would receive consensus decisions and ledger state, allowing operators to construct transaction records and choose what information to retain. They would not vote in consensus, and their operation would not give an outside party authority over the main network.

Open-sourcing that software therefore improved independent access to network data, but it did not decentralize consensus by itself. That distinction was institutionally important for developers evaluating whether Hedera’s governance and operating model matched the familiar assumptions attached to public blockchains.

HBAR distribution was part of the security design

The scheduled opening also would begin distribution of HBAR, Hedera’s native asset, to participants in Simple Agreements for Future Tokens. Hedera said those offerings had raised $124 million in 2018 and described a 15-year distribution program intended to broaden ownership gradually.

In a separate August 29 statement, co-founder Mance Harmon said the initial release at open access was expected to represent 3.18% of a total supply of 50 billion HBAR, or approximately 1.59 billion tokens. Hedera expected 7.53% of the supply to have been released by the end of 2019 under the schedule then in effect.

Those were company plans, not completed distributions on August 29. The figures also did not establish a market price, circulating market capitalization or level of trading liquidity. HBAR’s release was scheduled to begin only when open access commenced.

Hedera argued that gradual distribution was necessary because its intended proof-of-stake system weighted consensus influence by stake. The company’s position was that opening node operation before ownership had become sufficiently dispersed could make concentrated control easier. That security rationale was a contemporaneous project claim; the August 29 materials did not independently prove that the release schedule would produce broad ownership or prevent manipulation.

A measured protocol rollout

For September 16, Hedera advertised three initial services: cryptocurrency transfers, smart contracts and file storage. It said cryptocurrency transfers would be throttled at 10,000 transactions per second, while smart-contract and file services would begin at 10 transactions per second. These were announced operating limits and performance intentions, not independently measured production throughput on August 29.

Independent contemporaneous reporting confirmed the planned opening, mirror-node release, fundraising figure and extended token-distribution schedule. The defensible event-day conclusion remained narrower than a completed network launch: Hedera had fixed a public-access date, opened an observational component of its software and disclosed how cautiously it intended to release HBAR, while consensus operation remained restricted and real-world usage had yet to be demonstrated.