Emerging Chains and Relay Bridge Expansion: Which Blockchain Networks Should Be Bridged Next and Why

A developer building on Solana faces a practical constraint: assets live in one ecosystem, but liquidity and users are fragmented across Ethereum, Polygon, Arbitrum, and other established networks. Moving tokens between chains currently requires multiple hops, high slippage, or custodial risk. A multi-chain protocol that can move tokens, stablecoins, and NFTs efficiently across emerging Layer 1 networks would unlock billions in locked capital and reduce friction for users who operate across multiple ecosystems. The question is not whether additional chains should be supported, but which ones offer sufficient liquidity depth, validator security, and user adoption to justify the engineering effort and security audits required for safe expansion.

The bridge protocol landscape has shifted from centralized custodians holding wrapped assets to non-custodial infrastructure using validator sets and multi-party signature aggregation. This reduces counterparty risk but introduces new constraints: expansion to a new chain requires sufficient validators to run nodes, enough liquidity to handle realistic transfer volumes, and sufficient transaction fees to make bridging economical rather than prohibitively expensive. Relay Bridge currently serves Ethereum, BNB Chain, Polygon, Avalanche, Arbitrum, Optimism, and Fantom—a set of networks chosen for their liquidity, security maturity, and developer activity. Evaluating which networks should be added next requires examining network effects, TVL concentration, user behavior, and the economic incentives that keep validators and liquidity providers engaged.

Why Solana must become a priority bridge target

Solana has established itself as the largest ecosystem outside Ethereum, with transaction volumes, active wallets, and DeFi TVL that rival many Layer 2 networks. Yet Solana operates on separate tokenomics, different validator infrastructure, and its own token standard. Bridging to Solana is not a matter of adding another EVM chain; it requires supporting a fundamentally different runtime environment. The economic case is strong: Solana hosts gaming applications, NFT markets, and DeFi protocols with billions in locked value that remain isolated from Ethereum liquidity pools and Polygon gaming ecosystems.

The challenge is technical and economic. Solana’s validator set is already decentralized with roughly 2,000 active validators, but running a bridge validator on Solana carries different infrastructure costs and operational complexity than running nodes on Ethereum or Arbitrum. A bridge protocol needs enough validators to secure the cross-chain messaging without creating a centralized bottleneck. Solana’s fast finality—approximately 400 milliseconds—is an advantage for settlement speed, but it requires bridge validators to handle rapid state changes and maintain consensus across two separate validator sets simultaneously.

Liquidity concentration is the second constraint. Most Solana liquidity is held in native Solana tokens (SOL) and projects built directly on Solana such as Marinade Finance or Magic Eden NFTs. To make bridging useful, sufficient amounts of stablecoins, wrapped Ethereum, and wrapped Polygon tokens must exist on Solana, either through existing bridges or through Relay Bridge’s own liquidity routing. If a user bridges USDC from Ethereum to Solana but cannot easily convert it back to SOL or native Solana applications, the bridge creates friction rather than reducing it.

The path forward for Solana support is conditional on three factors: validators willing to operate Solana nodes at competitive rates, sufficient stablecoin and wrapped-asset liquidity on Solana to make routing efficient, and user demand demonstrating that cross-chain movement between Solana and Ethereum/Layer 2 ecosystems is frequent enough to justify the operational overhead. If those conditions are met, Solana becomes the natural fourth-priority chain after the current seven networks.

Cosmos and interoperability chains: different constraints, different rewards

Cosmos represents a different architectural choice: a modular blockchain framework built for interoperability through the Inter-Blockchain Communication (IBC) protocol. Networks like Osmosis, Juno, and Celestia are Cosmos-based chains with their own validator sets, token economics, and communities. Unlike Solana, which is a single high-throughput network, Cosmos is a heterogeneous ecosystem where each chain makes its own security and governance decisions.

The strategic appeal is clear: Cosmos chains already prioritize cross-chain liquidity through IBC, and their communities actively explore connections to Ethereum and other Layer 1 networks. An application on Osmosis might need to access Ethereum liquidity without going through centralized exchanges, and a DeFi protocol on Juno might benefit from users bridging assets in from Avalanche or Arbitrum. However, the integration complexity is substantially higher. IBC communication works between Cosmos chains natively, but connecting Relay Bridge (which uses Ethereum-compatible validator signatures and multi-party aggregation) to Cosmos chains requires either a new validator set specifically for Cosmos, or a relay infrastructure that can translate between IBC and Relay’s signing model.

Cosmos chains also introduce validator concentration risk in a different way. Many Cosmos chains have smaller validator sets (often 50–100 active validators compared to Ethereum’s thousands or Solana’s 2,000+), which means that operating a bridge validator on a smaller Cosmos chain might represent a meaningful percentage of the total validator set. That concentration can be acceptable if the chain has sufficient security through alternative means (such as Celestia’s data availability guarantees or Osmosis’s DeFi-specific security assumptions), but it must be evaluated explicitly rather than assumed.

The liquidity question for Cosmos is also distinct. Many Cosmos chains have strong native DeFi ecosystems but smaller TVL compared to Ethereum or Polygon. A bridge that enables moving ATOM, OSMO, or JUNO to other chains could be valuable for users who want to diversify or access specific opportunities on Ethereum. However, the reverse direction—moving assets from Ethereum into Cosmos—requires sufficient incentives and applications to justify the user’s effort and risk. The bridge becomes most valuable when both directions have active use cases.

NEAR Protocol and application-specific chains: betting on developer adoption

NEAR Protocol positions itself as a user-friendly blockchain with simplified onboarding, human-readable account names, and a focus on developer experience. Unlike Solana’s high throughput or Cosmos’s modular vision, NEAR emphasizes abstraction layers that reduce the cognitive load on new users. This makes NEAR potentially valuable for consumer applications, gaming, and DAOs that prioritize accessibility over raw throughput.

From a bridge perspective, NEAR presents a moderate liquidity challenge and a high potential-value scenario. Currently, NEAR’s TVL is substantially smaller than Solana or Ethereum, but the network supports gaming applications and NFT projects that could benefit from cross-chain bridging. A user playing a game built on NEAR might want to convert earned tokens into stablecoins or Ethereum-based assets; conversely, an NFT collector might want to bridge valuable digital assets from Ethereum into a NEAR-based game or marketplace.

NEAR’s validator infrastructure is also more accessible than Solana’s high-speed requirements. Running a NEAR validator node involves lower hardware demands and simpler operational setup compared to maintaining Solana validator infrastructure. This could lower the cost of acquiring validators for a bridge, making NEAR expansion more economically feasible than initially apparent. However, this advantage only materializes if sufficient validators are willing to operate NEAR bridge nodes, and that depends on realistic expectations about bridging volume and associated rewards.

The wildcard for NEAR is developer adoption. If gaming applications and consumer-facing platforms built on NEAR attract significant user bases, bridging becomes urgent. If adoption plateaus, supporting NEAR becomes a speculative bet on future growth rather than a response to current demand. This suggests a phased approach: establish initial bridge support with a smaller validator set and observe usage patterns, then expand validator participation and liquidity if volumes justify the investment.

Layer 2 consolidation and the case for strategic selectivity

Relay Bridge already supports Arbitrum and Optimism, the two largest Ethereum Layer 2 networks by TVL and user activity. A natural question emerges: should Relay Bridge also support StarkNet, Linea, Scroll, Manta, and other emerging Layer 2s? The answer is more nuanced than raw TVL metrics suggest, because Layer 2 expansion involves different constraints than Layer 1 expansion.

Layer 2s all settle to Ethereum and use Ethereum’s validator security as their foundation. This means that bridge validators do not need to maintain separate consensus for each Layer 2; instead, they can monitor Layer 2 states through Ethereum blocks and respond accordingly. This lowers the operational complexity substantially. However, each Layer 2 uses different state commitment schemes, rollup compression, and finality timings. Arbitrum’s AnyTrust validator model, Optimism’s sequencer, and StarkNet’s STARK proofs all require different verification logic within the bridge protocol.

The more important constraint is liquidity fragmentation. If bridge support is added to ten different Layer 2s but user demand concentrates on Arbitrum and Optimism, then supporting the other eight layers dilutes liquidity and increases slippage across all routes. A user bridging to a low-liquidity Layer 2 might pay double the gas costs in slippage compared to bridging to Arbitrum or Optimism. This creates a vicious cycle: low liquidity makes bridging expensive, which discourages users, which prevents liquidity from accumulating.

The strategic approach for Layer 2 expansion is therefore conditional on demonstrated demand, not preemptive coverage. Relay Bridge should monitor which Layer 2s attract substantial DeFi TVL, gaming activity, or institutional users, and add bridge support once usage patterns indicate that cross-chain movement is frequent enough to support liquidity routing efficiently. This aligns with the blockchain bridge design principle of optimizing for real demand rather than maximizing theoretical coverage.

Measuring market readiness: the three-factor framework

Deciding which chains Relay Bridge should support next requires a systematic evaluation framework beyond informal speculation. Three factors provide measurable signals of market readiness: liquidity depth, validator availability, and user transaction volume patterns across existing bridges.

Liquidity depth is the most fundamental constraint. A chain is bridge-ready when it hosts sufficient stablecoin liquidity (at minimum, $50–100 million in USDC, USDT, and DAI across major DeFi venues) and sufficient wrapped-asset liquidity (bridged versions of major tokens already operating on the destination chain). This ensures that a user can actually use bridged assets for something meaningful rather than receiving tokens that cannot be traded, lent, or exchanged without paying prohibitive slippage. Current bridge activity to Solana provides a useful baseline: if Solana’s existing bridges (Wormhole, Allbridge, and others) handle consistent daily volume in the range of $10–50 million, then Solana is already sufficiently liquid to support another bridge protocol.

Validator availability is the second signal. A chain becomes operationally feasible for Relay Bridge when at least 15–25 independent validators express interest in running bridge nodes and meeting required uptime and attestation responsibilities. This number balances security (sufficient decentralization to prevent single-node failure) with operational efficiency (manageable validator set size). Conversations with existing validators on Relay Bridge’s current networks, and with node operators on candidate chains, provide direct input into feasibility.

User demand patterns constitute the third factor. This includes monitoring bridge traffic on existing multi-chain protocols, surveying developers and users on which chains they want access to from Relay Bridge’s current network set, and analyzing DeFi transaction flows to identify where capital is moving and why. If a developer building on Polygon consistently needs to access Cosmos assets, or if a gaming protocol on Arbitrum wants to bridge rewards to Solana, those concrete use cases provide stronger signals than abstract market projections.

The case for strategic expansion versus breadth coverage

Some bridge protocols pursue maximalist coverage: support as many chains as possible, regardless of liquidity depth or user demand. This approach has marketing appeal (more chains equals broader reach) but creates operational problems. Every additional chain increases validator infrastructure costs, introduces new security audit requirements for the bridge’s smart contracts on that chain, and requires ongoing maintenance as the chain’s protocol evolves. If liquidity is thin on the added chain, users experience poor execution, which damages the protocol’s reputation and discourages future use.

The alternative is strategic expansion: add chains only when clear demand, sufficient liquidity, and validator interest align. This approach prioritizes depth of liquidity routing and quality of execution over breadth of network coverage. Users experience better prices, faster settlements, and fewer failed transactions, which builds trust and encourages higher volume. Higher volume creates stronger economic incentives for validators and liquidity providers, which attracts more participation, which further improves execution. The network effects compound in the right direction.

Relay Bridge’s current network selection reflects this philosophy. Rather than supporting thirty chains at minimal liquidity, it serves seven networks chosen for their liquidity depth, mature validator infrastructure, and active developer communities. Expansion to Solana, NEAR, or Cosmos should follow the same principle: add support when the market is actually ready, not when marketing opportunity suggests it might be someday.

Users and developers can monitor Relay Bridge’s expansion plans through the official project resources at sites.google.com/mywalletcryptous.com/relay-bridge-official-site/, where roadmap updates and technical requirements for new chain support are published. This transparency allows the community to understand the criteria being applied and provide feedback on which chains should be prioritized.

Interoperability as network effect infrastructure

The deepest insight about multi-chain bridging is that the bridge itself is infrastructure for network effects. A bridge that connects two chains enables value transfer, but a bridge that connects seven chains enables complex routing: value can move between any two chains through multiple paths, competition between routes reduces fees and slippage, and developers can compose applications across chains more easily.

This network-effect logic creates an expansion strategy distinct from simple chain coverage. Solana expansion would be valuable because Solana is large enough that connecting it to Relay Bridge’s existing seven networks creates substantial new routing possibilities. It would enable Ethereum liquidity to flow into Solana applications more efficiently, and Solana-native assets to access Ethereum DeFi. The value created by this connection is real and measurable in the reduction of slippage, fees, and counterparty risk.

Conversely, adding a small Layer 2 with $10 million in TVL to Relay Bridge’s network might add complexity without creating proportional value. The new chain cannot route volume to existing networks in a way that improves outcomes for users on those networks, because the small chain has too little liquidity to absorb large trades. The bridge becomes a burden rather than an asset.

This suggests that the highest-value expansion targets are already identifiable: Solana (for its size and isolation from current Relay networks), NEAR (for developer experience and gaming potential), and perhaps one established Cosmos chain (for IBC interoperability and Eastern hemisphere developer communities). Other chains should be evaluated on the same framework, but these three represent the clearest case for market readiness and maximum network effect value creation.

Timeline and governance considerations for new chain support

Adding a new chain to Relay Bridge requires time and community alignment. The technical process typically involves weeks of development (implementation of the new chain’s state verification, validator coordination, and SDK support), security audits (which can take 4–8 weeks depending on complexity), testnet deployment (to verify behavior under realistic conditions), validator recruitment and training, and liquidity bootstrap arrangements with market makers.

This timeline suggests that major expansion decisions should be made six to nine months in advance of desired launch. If Solana support is desired in Q3 2025, conversations with validators and liquidity providers should begin in Q4 2024, with development starting shortly thereafter. This pacing also allows the bridge team to communicate clearly with the community about engineering progress and to adjust timelines if unexpected complexities emerge.

Governance of the expansion process matters for protocol credibility. If decisions about new chain support are made opaquely by a small team, users may worry that growth is driven by deals or marketing rather than genuine market demand. A transparent process—publicly announced evaluation criteria, community input periods, and clear reasoning for decisions to add or defer chains—builds confidence that Relay Bridge is prioritizing real utility rather than chasing coverage metrics.

The long-term vision for Relay Bridge should be a blockchain interoperability protocol that becomes the default choice for efficient cross-chain asset movement because it executes well rather than because it offers marginally more network coverage. That reputation is earned through disciplined expansion, quality execution, and community trust—not through maximalist ambition.

Thank you for reading!