Rabby Wallet: Limitations Beyond EVM – Why Bitcoin and Solana Aren’t Supported

An Ethereum user with a diversified portfolio faces a practical constraint: they hold assets across multiple blockchains—some Ethereum and Layer 2 tokens, some Solana-based NFTs, and some Bitcoin in cold storage. A single browser extension that manages all of them would simplify recovery phrase management and reduce extension bloat. Yet opening Rabby Wallet reveals that it explicitly does not support Bitcoin or Solana, only Ethereum and EVM-compatible networks. That limitation is not an oversight or a roadmap item for future development; it reflects a deliberate architectural choice made by the wallet developers.

Understanding why that choice exists, and what trade-offs it enables, is essential for users evaluating whether Rabby is sufficient for their needs or whether a multi-chain strategy requires additional wallets. The answer involves blockchain architecture, cryptographic models, transaction mechanics, and the different security assumptions that distinguish EVM chains from Bitcoin and Solana. A wallet designed for one environment may not be able to meaningfully support another without either compromising its design principles or duplicating functionality that would be better handled by specialized tools.

Why Rabby Wallet is built exclusively for EVM networks

The Ethereum Virtual Machine (EVM) is a standardized execution environment that defines how transactions are processed, state is updated, and accounts are derived from private keys. Every EVM-compatible chain—Arbitrum, Optimism, Polygon, Avalanche, Base, and dozens of others—follows the same account model and signing mechanism. A single wallet implementation can support all of them because the underlying cryptography and account derivation are identical. A user’s Ethereum address, derived from a single BIP-39 recovery phrase using a specific derivation path, produces the same account identifier on every EVM chain.

Rabby Wallet leverages this uniformity by implementing a single codebase that manages accounts, signs transactions, and interacts with smart contracts across all EVM networks. The wallet’s transaction simulation feature, for example, reads contract ABIs and token transfers to show the user the expected balance changes before they approve any transaction. That simulation logic works the same way on Ethereum mainnet, Arbitrum, Optimism, and Polygon because the transaction format, execution rules, and state-reading mechanisms are standardized. Extending that feature to a non-EVM chain would require reimplementing simulation logic, parsing different transaction formats, and handling chain-specific quirks—essentially building a second wallet inside the same application.

The self-custodial model that Rabby emphasizes also depends on direct account control. Users never hand private keys to the wallet provider; instead, they sign transactions locally using a recovery phrase or imported private key. That design works because EVM chains have a consistent signature verification mechanism: ECDSA (Elliptic Curve Digital Signature Algorithm) with Keccak-256 hashing. A transaction signed with that mechanism is valid on every EVM network. Bitcoin and Solana use different signing schemes and account derivation paths, which means a user’s Bitcoin private key does not correspond to a Solana address, and neither can be used for Ethereum. The wallet would need to manage separate key hierarchies for each chain, which complicates recovery, backup, and key rotation.

Rabby’s automatic network detection is another example of EVM-specific design. When a user connects to a dapp through rabby wallet browser extension, the wallet can automatically switch to the correct network because the dapp signals its chain ID through the Ethereum JSON-RPC standard. Bitcoin does not have an equivalent mechanism; Solana’s JSON-RPC is different enough that the same detection logic does not apply. Adding support for those networks would require writing separate code paths, handling different error states, and testing each chain independently—adding maintenance burden that conflicts with Rabby’s focus on EVM security and efficiency.

Bitcoin’s UTXO model and address derivation are fundamentally different

Bitcoin uses an unspent transaction output (UTXO) model rather than an account balance model. When a user receives Bitcoin, they are not adding to an account balance on a shared ledger; instead, they are receiving control over a discrete piece of Bitcoin that was output by a previous transaction. To spend that Bitcoin, a user must reference the previous transaction, prove ownership of the output through a cryptographic signature, and create a new transaction that moves the value elsewhere. Each output becomes an input to the next transaction.

This model has profound implications for wallet design. An EVM wallet displays a single account balance because all tokens held by that account are tracked in smart contract state. A Bitcoin wallet must track discrete UTXOs, track which ones have been spent, and ensure that the user does not attempt to spend the same output twice. Rabby Wallet’s interface assumes it is managing account balances across multiple tokens and chains; adapting that interface to display and manage UTXOs would require a different architectural approach. The transaction creation process is also different: EVM transactions have a single „to“ address and a single amount, while Bitcoin transactions can have multiple inputs and outputs, each potentially going to different destinations. A user might consolidate several small UTXOs into one, or split a large UTXO into several smaller pieces for different purposes. Rabby’s transaction preview system would need to be rebuilt to handle that complexity.

Bitcoin’s address derivation is also incompatible with Ethereum. Bitcoin uses BIP-32 hierarchical deterministic (HD) wallets with specific derivation paths defined by BIP-44, and it supports multiple address formats: legacy (P2PKH), segwit (P2WPKH), and native segwit (P2WPKH-v0). Each format is derived from the same master seed using different paths, and each has different implications for transaction size and fee efficiency. An Ethereum wallet that imported a BIP-39 recovery phrase could theoretically derive the corresponding Bitcoin address using the BIP-44 path, but doing so correctly requires understanding these distinctions. A user might accidentally use a legacy address when a native segwit address would reduce fees by 30 percent, or mix address formats in ways that expose transaction patterns to chain analysis. Rabby’s strength is precise, correct implementation for EVM; adding Bitcoin support correctly would mean encoding all of that complexity and potentially confusing users who are accustomed to Rabby’s simpler model.

Bitcoin’s fee market is also separate from gas pricing on EVM chains. Bitcoin fees are based on transaction byte size and current network congestion, expressed in satoshis per byte. EVM chains use a gas model where different operations consume different amounts of gas, and the total fee is gas used multiplied by a gas price. A wallet that manages both would need to explain these different fee mechanisms clearly and help users estimate fees accurately for each chain. A user accustomed to Rabby’s gas estimation might assume they can predict Bitcoin transaction costs using the same reasoning, leading to either overpayment or unconfirmed transactions.

Solana’s account model and parallel processing create separate requirements

Solana superficially resembles an account-based blockchain like Ethereum: accounts hold balances, transactions modify state, and users sign with private keys. But the similarity ends quickly. Solana uses a different cryptographic scheme for account derivation—Ed25519 rather than Keccak-256—which means a recovery phrase that produces an Ethereum account does not produce the same Solana account. A wallet supporting both chains must either maintain separate recovery phrases for each, require the user to manually specify which derivation path to use, or derive accounts on different paths and display them distinctly. All three approaches introduce complexity that undermines the simplicity Rabby aims for.

Solana’s transaction model is also distinctly different. Solana transactions are not processed by a single validator sequentially; instead, they are distributed to different validators who process them in parallel on different parts of the account space. This creates an entirely different architecture for nonce management, transaction ordering, and failure modes. An Ethereum transaction is confirmed or reverted; a Solana transaction might be processed partially, with some instructions succeeding and others failing, and then re-executed if the user includes additional signers. A wallet designed for Ethereum’s sequential, all-or-nothing model would struggle to represent Solana’s more complex execution semantics to a user. Rabby’s transaction preview would need to account for parallelism, instruction-level failures, and account contention in ways that the current EVM-focused implementation cannot handle.

Solana’s fee structure is also independent. While Ethereum uses a dynamic gas model with base fees, priority fees, and MEV protection mechanisms, Solana charges a flat fee per transaction plus additional fees for account creation or state modifications. The two models are sufficiently different that displaying fees in a unified way would either be inaccurate or require separate explanations for each chain. A user managing tokens across both chains would need to understand that a simple Ethereum transfer and a simple Solana transfer have completely different cost dynamics.

Solana’s programming model and instruction format are also incompatible with Ethereum’s smart contract approach. While both support composable transactions and complex interactions, a Solana transaction explicitly lists all accounts it will access and requires them to be specified in advance, whereas an Ethereum transaction can discover new accounts dynamically through contract execution. This difference affects how a wallet displays what a transaction will do. Rabby’s simulation shows expected balance changes by executing the transaction on a local blockchain copy and reading the result. Solana requires knowledge of account access patterns before execution, which means simulation would need to be implemented differently or would provide less information.

Multi-chain wallets introduce separate maintenance and security costs

Adding Bitcoin and Solana support to Rabby would not simply mean writing code for two additional chains. Each new chain requires integration with its blockchain, which means running or connecting to nodes, implementing chain-specific RPC methods, handling chain-specific error conditions, and testing against real network activity. A bug in Bitcoin integration could cause users to send funds to invalid addresses or lose access to UTXOs entirely. A bug in Solana integration could result in botched transactions or leaked account information. The testing burden multiplies with each chain, and the developer team’s ability to respond to chain-specific issues diminishes as the scope expands.

Security assumptions also diverge across chains. Bitcoin’s security model assumes miners will not collude to rewrite history, and the longest valid chain is the canonical version. Solana’s security model assumes that validators will properly execute transactions in parallel and reach consensus on state. Ethereum’s model assumes that a sufficient number of validators will process state changes consistently. A wallet that supports all three must understand which assumptions apply to each chain and surface the relevant risks to users. A user might understand that Ethereum transactions are finalized within minutes, but assume that Solana transactions are similarly fast without realizing that Solana can experience longer finality gaps or chain restarts in rare conditions. A wallet that does not clearly distinguish these risks can give false confidence.

The recovery and backup process also becomes more complex. Rabby currently asks users to save a single BIP-39 recovery phrase that controls all of their Ethereum and EVM assets across multiple networks. Adding Bitcoin and Solana means that the same phrase might or might not control assets on those chains, depending on which derivation path the wallet uses. If a user exports their recovery phrase and imports it elsewhere, they need to know whether the second wallet will find the same accounts. A mismatch could lead to lost funds or the belief that a backup is invalid when it is simply using a different derivation path. Rabby’s strength is that it handles this correctly for EVM; expanding to other chains without carefully documenting the recovery procedure could introduce critical user experience failures.

The practical approach: Rabby as part of a multi-wallet strategy

For users with significant holdings across multiple chains, the most reliable approach is to use Rabby Wallet for EVM assets and maintain separate, specialized wallets for Bitcoin and Solana. This is not a limitation of Rabby so much as a recognition that different chains are best managed by tools designed specifically for their architecture. A Bitcoin wallet such as BlueWallet, Sparrow, or a hardware wallet like Ledger is specifically designed to handle UTXO management, fee calculation, address formats, and recovery procedures for Bitcoin. A Solana wallet such as Phantom or Solflare is built to handle Solana’s account model, instruction format, and transaction semantics. Rabby excels at its specific domain: EVM networks and the dapps that run on them.

Using multiple wallets does introduce some additional overhead. A user must manage multiple recovery phrases or use a hardware wallet that can derive keys for all chains. They cannot move funds between chains within a single interface; instead, they must use a bridge or exchange service, which introduces counterparty risk and fees. However, this approach also provides clarity: each wallet is transparent about what it supports and how it works, and users develop a mental model of which tool is appropriate for each chain. An EVM wallet user can confidently use Rabby Wallet for all Ethereum, Arbitrum, Polygon, and similar assets, while knowing that Bitcoin and Solana require different tools.

For users who prefer consolidated key management, a hardware wallet provides a useful middle ground. Devices such as Ledger or Trezor can derive accounts on Bitcoin, Ethereum, Solana, and dozens of other chains from a single recovery phrase. These devices handle the complexity of different cryptographic schemes and account derivation paths, and they allow users to sign transactions from multiple specialized software wallets (Rabby for Ethereum, Phantom for Solana, Sparrow for Bitcoin) while keeping the private keys on the hardware device. This approach combines the security of hardware signing with the convenience of specialized wallet interfaces for each chain.

Bridge protocols and wrapped assets offer another option for users who want to consolidate liquidity. A user can lock Bitcoin on a bridge protocol and receive a wrapped version (such as WBTC or tBTC) on an EVM chain, then manage the wrapped asset using Rabby Wallet. This approach allows Rabby to manage the asset, but it introduces bridge risk: the wrapped asset is only as secure as the bridge protocol, and converting back to native Bitcoin requires trusting the bridge to release the locked collateral. For large or long-term holdings, this approach is generally riskier than keeping Bitcoin on its own chain in a dedicated wallet.

When Rabby Wallet’s EVM focus is actually a strength

Focusing exclusively on EVM networks allows Rabby to provide features that a generalist multi-chain wallet cannot. The transaction simulation that shows expected balance changes before signing is possible because Rabby understands the EVM state model completely. A multi-chain wallet would either need to implement simulation for each chain separately, incurring massive complexity, or disable the feature for non-EVM chains, which would reduce security for those assets. By remaining EVM-focused, Rabby can invest in features that matter most to users of Ethereum and Layer 2 protocols.

Security warnings about fake extensions and phishing attacks are also more effective when the scope is narrow. Rabby can clearly communicate which networks it supports and warn users about counterfeit extensions that might claim broader support. A user who sees a „Rabby Wallet“ extension claiming to support Bitcoin should immediately be suspicious, because genuine Rabby does not claim that capability. By maintaining a focused feature set, Rabby makes it easier for users to identify legitimate extensions and avoid malicious imitations.

The automatic network switching and gas estimation features also benefit from EVM focus. Because all EVM networks follow the same standard, Rabby can automatically detect which network a dapp is using and switch to it, and can estimate gas costs accurately across all supported chains. A multi-chain wallet would need different logic for each chain, which means more potential for errors, and the automatic features would either be less reliable or unavailable. Rabby’s approach of doing one thing exceptionally well is preferable to doing many things adequately.

The development and maintenance burden is also significantly lower for an EVM-focused wallet. The Rabby team can deeply understand the ecosystem of EVM dapps, stay current with protocol changes and security improvements, and respond quickly to emerging risks. Expanding to Bitcoin and Solana would require hiring specialists in those chains, maintaining relationships with their node operators and bridges, and keeping up with their respective security and upgrade cycles. That effort would necessarily reduce the time and energy available for improving EVM support, which is where the wallet’s value proposition lies.

Recommended complementary wallets for Bitcoin and Solana

For Bitcoin, Sparrow Wallet and BlueWallet are both strong open-source options that handle UTXO management, address formats, and privacy considerations. Sparrow is particularly useful for users who want coin control and detailed fee management, while BlueWallet emphasizes simplicity and mobile availability. Both can be used with hardware wallets, which is the recommended approach for users with significant Bitcoin holdings.

For Solana, Phantom and Solflare are the dominant specialized wallets. Both are available as browser extensions and mobile apps, can sign transactions directly, and support hardware wallet integration. Phantom tends to have broader dapp integrations and more frequent updates, while Solflare emphasizes open-source code and community governance. Users primarily using Solana for specific protocols or NFTs should evaluate which wallet has the best integration with those dapps.

Users who value simplicity can also use hardware wallets like Ledger or Trezor as their primary key storage, then use Rabby for Ethereum and EVM assets, Phantom or Solflare for Solana, and Sparrow or BlueWallet for Bitcoin. The recovery phrase from the hardware wallet controls all of these, and users never expose private keys to any of the software wallets. This approach is more secure for long-term storage and also the most straightforward for managing diverse portfolios without worrying about separate recovery phrases for each software wallet.

The future of Rabby Wallet and single-chain specialization

The cryptocurrency wallet market is gradually shifting toward accepting that no single wallet can efficiently serve all chains. The most successful recent wallets have chosen to specialize: Phantom for Solana, Phantom for its expansion into Polygon and Bitcoin, and Rabby Wallet for Ethereum and EVM chains. This specialization allows each wallet to provide superior security, simulation, and user experience for its chosen domain. Attempting to be everything usually results in being mediocre at everything.

Rabby Wallet’s commitment to supporting only EVM networks likely will not change, nor should it. The wallet’s strength lies in its precise implementation of EVM features, its security focus, and its integration with dapps built on Ethereum and Layer 2 protocols. Users who need multi-chain support can use Rabby as one component of a broader wallet strategy, complemented by specialized tools for Bitcoin, Solana, and other chains. That layered approach is both more secure and more user-friendly than attempting to consolidate incompatible blockchains into a single interface.

For new users evaluating Rabby Wallet, the limitation to EVM networks should not be viewed as a shortcoming. Instead, it is a signal of serious design thinking. A wallet that understands its constraints and implements within them is more trustworthy than one that claims universal support but handles edge cases poorly. Users whose entire cryptocurrency portfolio is concentrated on Ethereum and EVM Layer 2s can confidently use Rabby as their primary wallet. Those with Bitcoin or Solana holdings should plan to use Rabby as part of a multi-wallet setup, with each wallet chosen for its specific strengths.