The Marscoin Technical Roadmap

Introduction

A roadmap for a cryptocurrency designed for Mars cannot be driven by market cycles, competitive pressure, or the feature du jour. It must be driven by physics, by the constraints of interplanetary settlement, and by an unwavering commitment to the properties that will matter when the blockchain is operating 225 million kilometers from its nearest peer.

This document describes the technical direction of the Marscoin protocol: what has been implemented, what is planned, and — critically — why each decision serves the ultimate mission of providing reliable financial and governance infrastructure for a permanent human settlement on Mars.

Block Time: 123 Seconds

Marscoin targets a block time of approximately 123 seconds. This is not an arbitrary number.

A Mars solar day (sol) is 24 hours, 37 minutes, and 22.663 seconds — roughly 88,775 Earth seconds. Dividing a sol by 24 yields a Mars hour; dividing further by 60 yields a Mars minute of approximately 61.65 Earth seconds. Marscoin’s 123-second block interval is intentionally close to two Mars minutes.

The rationale extends beyond symbolism. A 2-minute block time offers faster first-confirmation than Bitcoin’s 10 minutes or Litecoin’s 2.5 minutes, which matters enormously for point-of-sale transactions in a small settlement. It also provides more granular timestamping for the governance functions — voting, logbook entries, resource tracking — built on top of the chain. At the same time, 123 seconds is long enough to avoid the excessive orphan rates and bandwidth overhead that plague chains with sub-minute block intervals.

For a detailed analysis of this design choice, see Block Time: The Mars Minute.

ASERT Difficulty Adjustment

What It Is

ASERT (Absolutely Scheduled Exponentially Rising Targets) is a per-block difficulty adjustment algorithm that calculates the ideal difficulty for every single block based on elapsed time since a fixed anchor point. It replaced the legacy windowed difficulty adjustment at block 3,000,000 in July 2024.

Why It Matters

The legacy difficulty algorithm — inherited from Litecoin — recalculated difficulty every N blocks. This created oscillation problems: hash power surges would spike difficulty, causing miners to leave, which dropped difficulty, attracting miners back. The sawtooth pattern made block times erratic and created exploitation windows for hash-raiders who could game the discrete adjustment boundaries.

ASERT eliminates these problems entirely. Because difficulty adjusts continuously — every single block — there is no lag, no oscillation, and no window to exploit. When hash power increases, difficulty rises immediately. When it decreases, difficulty drops immediately. The result is remarkably stable block times regardless of how volatile the mining landscape becomes.

This was essential preparation for merged mining, which introduces large and rapid fluctuations in effective hash power as Scrypt mining pools add and drop Marscoin as an auxiliary chain.

For the full technical specification, see The ASERT Difficulty Algorithm.

Anti-ASIC Philosophy and the RandomX Discussion

The Principle

Marscoin uses the Scrypt hashing algorithm, which is memory-hard and thus more resistant to ASIC domination than SHA-256. This is a deliberate choice rooted in a core principle: the hardware that secures the Mars blockchain should be general-purpose hardware that serves other functions in a resource-constrained settlement.

On Mars, every kilogram of payload matters. Shipping purpose-built ASIC mining rigs — devices that do nothing except compute hashes — is an extravagant use of precious cargo capacity. General-purpose computers, on the other hand, can serve as mining nodes, scientific workstations, communication terminals, and governance platforms simultaneously. The same hardware that processes a transaction can analyze a soil sample or render a habitat design.

The Current State

Scrypt ASICs do exist, and they dominate Litecoin mining. This means Marscoin’s Scrypt PoW is no longer truly ASIC-resistant in practice. However, the activation of merged mining (AuxPoW) in 2025 means that Marscoin benefits from the existing Scrypt ASIC infrastructure without requiring independent ASIC investment — miners securing Litecoin simultaneously secure Marscoin at no additional cost.

The RandomX Option

The community has discussed a potential future transition to RandomX, the Proof of Work algorithm used by Monero. RandomX is designed to be optimally efficient on general-purpose CPUs, making it genuinely ASIC-resistant — not merely memory-hard, but architecturally optimized for the instruction sets of commodity processors.

For Mars, this has compelling advantages:

Any computer can mine. No specialized hardware required.
CPU mining is egalitarian. One processor, one fair share of hash power.
Multi-purpose hardware. The same CPUs that mine Marscoin run the settlement’s other software.

The trade-off is that a RandomX transition would break merged mining compatibility with Litecoin, requiring Marscoin to secure its own hash rate independently. This is acceptable — even desirable — once the Mars settlement has its own computing infrastructure. But during the current Earth-based phase, where merged mining provides security far beyond what Marscoin could achieve alone, the transition is premature.

The current position: RandomX remains a strong candidate for the Mars-phase algorithm, with a transition planned for when independent Mars-based mining becomes viable.

Merged Mining as a Bridge Strategy

The Problem

As a small-cap Scrypt chain, Marscoin’s native hash rate provides limited security. A sufficiently motivated attacker with access to Litecoin-scale mining hardware could mount a 51% attack with relatively modest resources.

The Solution

In February 2025, Marscoin activated AuxPoW (Auxiliary Proof of Work) at block 3,145,555, enabling merged mining with Litecoin and other Scrypt chains. Through a partnership with Longpool, Marscoin now benefits from approximately 2 TH/s of network hash rate — security that would be impossible to achieve independently.

The Bridge Philosophy

Merged mining is explicitly understood as a bridge strategy, not a permanent architecture. The logic is straightforward:

Earth phase (now): Marscoin is a small chain vulnerable to hash-rate attacks. Merged mining borrows security from larger networks. Cost: zero additional energy. Benefit: orders-of-magnitude security improvement.
Transition phase (pre-settlement): As Mars settlement approaches, the protocol parameters are finalized and hardened. Merged mining continues to provide security while the community prepares for independence.
Mars phase (post-settlement): Once computing infrastructure exists on Mars, Marscoin transitions to independent mining — potentially on RandomX — secured by the settlement’s own hardware. The 4-to-24-minute light-speed delay makes merged mining with Earth impractical anyway.

This staged approach allows Marscoin to be maximally secure today while preserving the flexibility to adapt when conditions change. For the full technical details, see Merged Mining & AuxPoW.

Rejection of SegWit and RBF

SegWit (Segregated Witness)

SegWit separates transaction signatures from transaction data, enabling higher throughput and the Lightning Network. Many Bitcoin-derived chains have adopted it. Marscoin has not, and the decision is deliberate.

The primary concern is complexity. SegWit introduces a new transaction format, a new address format, and a significant increase in consensus-critical code complexity. For a chain that must eventually operate with limited developer resources on Mars — where debugging a consensus bug could be catastrophic — simplicity is a survival trait.

Additionally, SegWit’s primary benefit (enabling Lightning Network) addresses a scaling problem that Marscoin does not currently face. With 2-minute block times and modest transaction volume, the base layer provides sufficient throughput for the foreseeable future.

RBF (Replace-By-Fee)

RBF allows a sender to replace an unconfirmed transaction with a higher-fee version. This is useful for fee markets but fundamentally undermines zero-confirmation transaction reliability.

For a small Mars settlement, zero-confirmation transactions are critically important. When a settler buys supplies at the habitat store, the merchant needs to trust that the unconfirmed transaction will be mined. RBF introduces the possibility that the sender replaces the transaction after receiving the goods — a form of double-spending that, while detectable, creates friction and erodes trust in a small community where social cohesion matters.

Marscoin’s position: first-seen-first-valid. The first version of a transaction broadcast to the network is the one that will be mined. Period. This preserves the practical utility of zero-confirmation transactions for everyday commerce.

Dynamic Block Sizes (Planned)

The Problem

Fixed block sizes create a cliff: either there is room for the next transaction, or there is not. When blocks are consistently full, a fee market emerges, and transactions compete for limited space. This is acceptable for a store-of-value chain like Bitcoin but unacceptable for a chain designed to handle governance votes, research logbook entries, resource tracking, and daily commerce for an entire settlement.

The Approach

Marscoin is evaluating dynamic block size algorithms that allow the maximum block size to grow and shrink based on demand, with economic incentives (miner penalties) that prevent abuse. The leading candidates are variants of the algorithms used by Monero and Bitcoin Cash, adapted for Marscoin’s specific parameters.

The design goals are:

No hard cap that creates fee market cliffs. Blocks should accommodate legitimate demand.
Economic resistance to bloat. Miners should face costs for producing excessively large blocks, preventing spam attacks.
Predictable growth. The maximum block size should track actual usage, not speculative capacity.
Simplicity. The algorithm must be understandable and auditable by a small team.

This feature is in the research and specification phase, with implementation targeted for a future protocol upgrade.

Privacy Vision

Why Privacy Matters on Mars

In a settlement of dozens to hundreds of people, financial privacy is not a luxury — it is a social necessity. If every transaction is fully transparent on a public ledger, and the community is small enough that wallet addresses are easily linked to individuals, then everyone knows everyone else’s financial activity. This creates social pressure, enables coercion, and undermines the individual sovereignty that cryptocurrency is supposed to protect.

The Approach

Marscoin’s privacy roadmap is built around CoinShuffle and its successors — a class of decentralized mixing protocols that provide transaction privacy without requiring a trusted third party.

CoinShuffle is already integrated into the Martian Republic’s governance system for ballot privacy. The long-term vision extends this to general-purpose transaction privacy:

CoinShuffle for voting: Already implemented. Ballots are encrypted and shuffled so that the tally is verifiable but individual votes are secret.
CoinShuffle for transactions: Planned. Optional mixing that allows users to break the linkage between sender and recipient addresses.
Confidential transactions: Under research. Cryptographic techniques that hide transaction amounts while preserving verifiability.

The key constraint is that privacy features must not compromise auditability for community resource management. A Mars settlement will need transparent accounting for shared resources (water, power, oxygen) even as it provides privacy for personal transactions. Finding this balance is an active area of research.

End-of-Rewards Transition Plan

The Problem

Marscoin’s block reward schedule is designed so that all ~39.57 million MARS (39,569,900 to be precise) will have been mined by approximately 2025. After the final reward is issued, miners receive only transaction fees as compensation. If fees are insufficient to incentivize mining, hash rate drops, and the network becomes vulnerable.

The Strategy

The transition plan operates on multiple levels:

Merged mining absorbs the cost. Because Marscoin is mined alongside Litecoin via AuxPoW, miners do not need Marscoin block rewards to justify their energy expenditure. Litecoin rewards cover the cost; Marscoin fees are a bonus.
Governance transactions generate baseline fees. The Martian Republic’s voting, logbook, and registry functions create a steady stream of fee-bearing transactions independent of speculative trading volume.
Fee market development. As the ecosystem grows and block space becomes more valuable, natural fee pressure will emerge. Dynamic block sizes (see above) ensure this remains manageable.
Community mining incentives. The Marscoin Foundation maintains a reserve that can be used to subsidize mining during any transition period where fees alone are insufficient.

The end-of-rewards transition is not a crisis — it is a planned phase change that merged mining and governance-driven transaction volume make manageable.

Implementation Timeline

Phase	Status	Key Milestones
ASERT Difficulty	Active (July 2024)	Block 3,000,000 activation
Merged Mining (AuxPoW)	Active (Feb 2025)	Block 3,145,555 activation, Longpool partnership
End of Block Rewards	Complete (~2025)	Final reward issued, fee-only era
Dynamic Block Sizes	Research	Algorithm selection, specification
CoinShuffle Transactions	Research	Protocol specification, privacy-auditability balance
RandomX Evaluation	Discussion	Benchmarking, transition planning
Mars-Phase Independence	Future	Independent mining, Mars-optimized parameters

Guiding Principles

Every decision on this roadmap is evaluated against five principles:

Simplicity over cleverness. Complex systems fail in ways that complex systems cannot predict. On Mars, a consensus bug is an existential threat to the settlement’s financial infrastructure. The protocol must be simple enough for a small team to fully understand and maintain.
Transaction finality over flexibility. When a transaction is broadcast, it should be final. No RBF, no ambiguity, no second-guessing. A Mars economy needs the reliability of cash, not the uncertainty of pending authorizations.
General-purpose hardware over specialized hardware. Every device on Mars should do as many jobs as possible. Mining should not require devices that serve no other purpose.
Sovereignty over convenience. Features that increase dependence on Earth-based infrastructure are rejected, even if they offer short-term benefits. The goal is a chain that can operate independently on Mars.
Proven technology over novel technology. Marscoin adopts innovations only after they have been battle-tested on other networks. ASERT was proven on Bitcoin Cash. Merged mining was proven on Namecoin. CoinShuffle was proven in academic research. Mars is no place for untested code.

This roadmap is a living document maintained by the Marscoin Foundation. Technical decisions are made through community discussion on GitHub and Discord. The roadmap reflects the current consensus of the development team and active contributors as of April 2026.