Glossary OS

Plain meaning

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A tool or application that monitors and displays the value of your cryptocurrency holdings across multiple wallets, chains, and DeFi positions in one place. Portfolio trackers pull on-chain data via RPC and indexer APIs to show token balances, NFT collections, LP positions, staking rewards, and transaction history. Popular Solana portfolio trackers include Step Finance, Sonar Watch, and AssetDash. Most work by simply connecting a public wallet address.

Mental model

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Technical context

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Wallets, signing flows, dApps, and key management concepts.

Why builders care

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Portfolio Tracker (portfolio-tracker)
Category: Web3
Definition: A tool or application that monitors and displays the value of your cryptocurrency holdings across multiple wallets, chains, and DeFi positions in one place. Portfolio trackers pull on-chain data via RPC and indexer APIs to show token balances, NFT collections, LP positions, staking rewards, and transaction history. Popular Solana portfolio trackers include Step Finance, Sonar Watch, and AssetDash. Most work by simply connecting a public wallet address.
Related: Indexer, Wallet, DeFi (Decentralized Finance)

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Concept graph

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These branches show which concepts this term touches directly and what sits one layer beyond them.

Branch

Indexer

A specialized off-chain service that continuously ingests on-chain data (typically via a Geyser plugin or RPC polling) and stores it in a queryable database optimized for complex lookups, aggregations, and historical queries that the RPC node's account-state store cannot efficiently serve. Indexers power DAS APIs, portfolio trackers, analytics dashboards, and DEX order-history features by transforming Solana's append-only ledger into relational or document-oriented schemas with fast secondary indexes.

Geyser Plugin DAS (Digital Asset Standard) API

Open term

Branch

Wallet

Software or hardware that manages cryptographic keys and enables users to sign transactions, view balances, and interact with dApps. Hot wallets (Phantom, Solflare, Backpack) are internet-connected for convenience. Cold wallets (Ledger, Trezor) store keys offline for security. Wallets don't actually 'hold' tokens—they hold the private keys that control on-chain accounts.

Keypair Wallet Adapter

Open term

Branch

DeFi (Decentralized Finance)

Financial services built on blockchain smart contracts that operate without traditional intermediaries (banks, brokers). DeFi includes lending, borrowing, trading, insurance, and derivatives. Key properties: permissionless (anyone can participate), composable (protocols can be combined), transparent (open-source, auditable). Solana DeFi TVL has exceeded $5B, led by Jupiter, Raydium, Marinade, and Kamino.

AMM (Automated Market Maker)Lending Protocol

Open term

Next concepts to explore

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Infrastructure

Indexer

A specialized off-chain service that continuously ingests on-chain data (typically via a Geyser plugin or RPC polling) and stores it in a queryable database optimized for complex lookups, aggregations, and historical queries that the RPC node's account-state store cannot efficiently serve. Indexers power DAS APIs, portfolio trackers, analytics dashboards, and DEX order-history features by transforming Solana's append-only ledger into relational or document-oriented schemas with fast secondary indexes.

Open term

Web3

Wallet

Software or hardware that manages cryptographic keys and enables users to sign transactions, view balances, and interact with dApps. Hot wallets (Phantom, Solflare, Backpack) are internet-connected for convenience. Cold wallets (Ledger, Trezor) store keys offline for security. Wallets don't actually 'hold' tokens—they hold the private keys that control on-chain accounts.

Open term

Web3

DeFi (Decentralized Finance)

Financial services built on blockchain smart contracts that operate without traditional intermediaries (banks, brokers). DeFi includes lending, borrowing, trading, insurance, and derivatives. Key properties: permissionless (anyone can participate), composable (protocols can be combined), transparent (open-source, auditable). Solana DeFi TVL has exceeded $5B, led by Jupiter, Raydium, Marinade, and Kamino.

Open term

Web3

Probably Nothing

A heavily ironic phrase meaning the exact opposite — that something is very significant. Used when sharing a bullish signal, major partnership announcement, or notable on-chain activity that the speaker believes is underappreciated by the broader market. The sarcastic framing invites engagement and implies the audience should pay close attention.

Open term

Related terms

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Glossary entries become useful when they are connected. These links are the shortest path to adjacent ideas.

Infrastructureindexer

Indexer

A specialized off-chain service that continuously ingests on-chain data (typically via a Geyser plugin or RPC polling) and stores it in a queryable database optimized for complex lookups, aggregations, and historical queries that the RPC node's account-state store cannot efficiently serve. Indexers power DAS APIs, portfolio trackers, analytics dashboards, and DEX order-history features by transforming Solana's append-only ledger into relational or document-oriented schemas with fast secondary indexes.

Open term

Web3wallet-general

Wallet

Software or hardware that manages cryptographic keys and enables users to sign transactions, view balances, and interact with dApps. Hot wallets (Phantom, Solflare, Backpack) are internet-connected for convenience. Cold wallets (Ledger, Trezor) store keys offline for security. Wallets don't actually 'hold' tokens—they hold the private keys that control on-chain accounts.

Open term

Web3defi-general

DeFi (Decentralized Finance)

Financial services built on blockchain smart contracts that operate without traditional intermediaries (banks, brokers). DeFi includes lending, borrowing, trading, insurance, and derivatives. Key properties: permissionless (anyone can participate), composable (protocols can be combined), transparent (open-source, auditable). Solana DeFi TVL has exceeded $5B, led by Jupiter, Raydium, Marinade, and Kamino.

Open term

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Web3

The vision of a decentralized internet built on blockchain technology, where users own their data, identity, and digital assets. Web1 was read-only (static pages), Web2 is read-write (platforms like social media), Web3 is read-write-own (permissionless, user-sovereign). Web3 applications use wallets instead of logins and smart contracts instead of centralized servers.

Open term

Web3

dApp (Decentralized Application)

An application with its backend logic running on a blockchain as smart contracts rather than centralized servers. dApps typically have a traditional web frontend that interacts with on-chain programs via RPC. Users authenticate with wallets instead of username/password. Examples: Uniswap (Ethereum DEX), Jupiter (Solana DEX), Magic Eden (NFT marketplace).

Open term

Web3

Wallet

Software or hardware that manages cryptographic keys and enables users to sign transactions, view balances, and interact with dApps. Hot wallets (Phantom, Solflare, Backpack) are internet-connected for convenience. Cold wallets (Ledger, Trezor) store keys offline for security. Wallets don't actually 'hold' tokens—they hold the private keys that control on-chain accounts.

Open term

Web3

Seed Phrase (Mnemonic)

A 12 or 24-word human-readable backup of a wallet's master private key, generated using BIP-39 standard. The seed phrase can deterministically regenerate all derived keypairs (BIP-44 derivation paths). Losing the seed phrase means permanently losing access to all associated accounts. Never share, photograph, or store seed phrases digitally in plain text.

Open term