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Infrastructure

Mobile Wallet Adapter (MWA)

An open protocol and SDK that defines a local communication channel (via Android intents and a localhost WebSocket) between mobile dApps and Solana wallet apps installed on the same device, allowing dApps to request transaction signing and message signing without exposing private keys. MWA v2 supports authorization scoping, chain-agnostic signing, and session caching, and is the standard integration layer used by Phantom, Solflare, and other mobile Solana wallets.

IDmobile-wallet-adapterAliasMWA
Plain meaning

Plain meaning

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An open protocol and SDK that defines a local communication channel (via Android intents and a localhost WebSocket) between mobile dApps and Solana wallet apps installed on the same device, allowing dApps to request transaction signing and message signing without exposing private keys. MWA v2 supports authorization scoping, chain-agnostic signing, and session caching, and is the standard integration layer used by Phantom, Solflare, and other mobile Solana wallets.

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Technical context

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RPCs, validators, snapshots, indexing, and network plumbing.

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Mobile Wallet Adapter (MWA) (mobile-wallet-adapter)
Category: Infrastructure
Definition: An open protocol and SDK that defines a local communication channel (via Android intents and a localhost WebSocket) between mobile dApps and Solana wallet apps installed on the same device, allowing dApps to request transaction signing and message signing without exposing private keys. MWA v2 supports authorization scoping, chain-agnostic signing, and session caching, and is the standard integration layer used by Phantom, Solflare, and other mobile Solana wallets.
Aliases: MWA
Related: Solana Mobile, Wallet Adapter
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Concept graph

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Branch

Solana Mobile

A hardware and software initiative by Solana Labs producing Android smartphones (Saga, Chapter 2) with a secure element-backed seed vault for private key storage, a curated dApp store for Solana applications, and the Mobile Wallet Adapter protocol for standardized wallet-dApp communication on mobile. The Solana Mobile Stack (SMS) enables native mobile dApps to interact with on-device wallets without browser extensions or QR code scanning, targeting the mobile-first crypto user base.

Open term
Branch

Wallet Adapter

A TypeScript/JavaScript library maintained by Solana Labs (now under the Anza umbrella) that provides a unified interface and React context for connecting to and interacting with browser extension wallets (Phantom, Backpack, Solflare, etc.) using the Wallet Standard. It abstracts wallet-specific APIs behind a common connect/disconnect/signTransaction/sendTransaction interface, allowing dApps to support all compliant wallets without custom per-wallet integration code.

Wallet Standard
Open term
Next concepts to explore

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Infrastructure

Solana Mobile

A hardware and software initiative by Solana Labs producing Android smartphones (Saga, Chapter 2) with a secure element-backed seed vault for private key storage, a curated dApp store for Solana applications, and the Mobile Wallet Adapter protocol for standardized wallet-dApp communication on mobile. The Solana Mobile Stack (SMS) enables native mobile dApps to interact with on-device wallets without browser extensions or QR code scanning, targeting the mobile-first crypto user base.

Open term
Infrastructure

Wallet Adapter

A TypeScript/JavaScript library maintained by Solana Labs (now under the Anza umbrella) that provides a unified interface and React context for connecting to and interacting with browser extension wallets (Phantom, Backpack, Solflare, etc.) using the Wallet Standard. It abstracts wallet-specific APIs behind a common connect/disconnect/signTransaction/sendTransaction interface, allowing dApps to support all compliant wallets without custom per-wallet integration code.

Open term
Infrastructure

Priority Fee API

An RPC API (primarily Helius's getPriorityFeeEstimate) that calculates optimal priority fee recommendations based on real-time network congestion and historical fee data. Priority fees are priced in microlamports per compute unit. The API returns tiered estimates (low, medium, high, very high) to help developers balance cost and confirmation speed.

Open term
Infrastructure

logsSubscribe

A WebSocket subscription method that streams transaction log messages in real time as transactions are processed by the cluster, filterable by 'all' (every transaction), 'allWithVotes' (including vote transactions), or a specific program public key. It is the lowest-latency way for bots and monitoring systems to react to on-chain events emitted via Solana's msg! macro or Anchor's emit! macro without running a full validator or Geyser plugin.

Open term
Commonly confused with

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Infrastructurewallet-adapter

Wallet Adapter

A TypeScript/JavaScript library maintained by Solana Labs (now under the Anza umbrella) that provides a unified interface and React context for connecting to and interacting with browser extension wallets (Phantom, Backpack, Solflare, etc.) using the Wallet Standard. It abstracts wallet-specific APIs behind a common connect/disconnect/signTransaction/sendTransaction interface, allowing dApps to support all compliant wallets without custom per-wallet integration code.

Open term
Infrastructuresolana-mobile

Solana Mobile

A hardware and software initiative by Solana Labs producing Android smartphones (Saga, Chapter 2) with a secure element-backed seed vault for private key storage, a curated dApp store for Solana applications, and the Mobile Wallet Adapter protocol for standardized wallet-dApp communication on mobile. The Solana Mobile Stack (SMS) enables native mobile dApps to interact with on-device wallets without browser extensions or QR code scanning, targeting the mobile-first crypto user base.

AliasSMSAliasSaga
Open term
Infrastructurewallet-standard

Wallet Standard

A chain-agnostic TypeScript interface specification (maintained at github.com/wallet-standard/wallet-standard) that defines how browser-based wallets register themselves, expose supported features, and implement signing operations via a globally discoverable window object. On Solana, wallets implement the Solana-specific feature set (solana:signTransaction, solana:signMessage, etc.), allowing any compliant dApp using Wallet Adapter to enumerate and use installed wallets without hard-coded wallet detection logic.

Open term
Related terms

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Infrastructuresolana-mobile

Solana Mobile

A hardware and software initiative by Solana Labs producing Android smartphones (Saga, Chapter 2) with a secure element-backed seed vault for private key storage, a curated dApp store for Solana applications, and the Mobile Wallet Adapter protocol for standardized wallet-dApp communication on mobile. The Solana Mobile Stack (SMS) enables native mobile dApps to interact with on-device wallets without browser extensions or QR code scanning, targeting the mobile-first crypto user base.

Open term
Infrastructurewallet-adapter

Wallet Adapter

A TypeScript/JavaScript library maintained by Solana Labs (now under the Anza umbrella) that provides a unified interface and React context for connecting to and interacting with browser extension wallets (Phantom, Backpack, Solflare, etc.) using the Wallet Standard. It abstracts wallet-specific APIs behind a common connect/disconnect/signTransaction/sendTransaction interface, allowing dApps to support all compliant wallets without custom per-wallet integration code.

Open term
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Infrastructure

RPC (Remote Procedure Call)

The JSON-RPC 2.0 protocol interface through which clients communicate with Solana nodes to query chain state, submit transactions, and subscribe to events. Solana exposes a rich set of HTTP and WebSocket endpoints (e.g., getAccountInfo, sendTransaction) that abstract direct peer-to-peer network participation, making RPC the primary integration point for wallets, dApps, and indexers.

Open term
Infrastructure

RPC Node

A Solana full node that stores ledger state and serves JSON-RPC and WebSocket requests from clients without participating in consensus or voting. RPC nodes must replay every transaction to maintain an accurate account state database, and high-throughput deployments typically run dedicated RPC nodes with large SSDs, high RAM (256 GB+), and high-bandwidth network connections to handle concurrent client load without impacting validator performance.

Open term
Infrastructure

RPC Methods

The enumerated JSON-RPC endpoints exposed by Solana nodes, covering account queries (getAccountInfo, getMultipleAccounts, getProgramAccounts), block and transaction retrieval (getBlock, getTransaction), cluster metadata (getEpochInfo, getSlot, getVersion), and transaction submission (sendTransaction, simulateTransaction). Methods accept a Commitment parameter (processed, confirmed, finalized) to control the recency-vs-safety tradeoff of returned data.

Open term
Infrastructure

getAccountInfo

An RPC method that returns the complete on-chain state of a single account identified by its base-58 public key, including its lamport balance, owner program, executable flag, rent epoch, and raw data payload encoded as base64 or base58. It is the most fundamental read primitive in Solana development and is called at the specified commitment level, with the data field being null if the account does not exist.

Open term