66 terms, A to Z: the assets, the rails, the standards, and the principles behind non-custodial settlement. Each definition ends with how U.CASH applies it and where to go next.
Address poisoning is a scam where an attacker sends a dust transaction from a lookalike a…
An allowlist is a transfer rule enforced at the token level: addresses on the list may ho…
Anti-money-laundering rules require businesses that move money to know their customers, m…
An atomic swap completes both legs of a trade or none of them. The mechanism (hash time-l…
A batch payout is many transfers submitted as one operation: a payroll run, a marketplace…
A batch send disperses one balance to many recipients in a single on-chain transaction: a…
A block explorer is the read interface to a blockchain: paste an address, transaction, or…
A bridge moves assets between blockchains. The canonical pattern locks or burns the asset…
A buyer reference is the identifier a payer puts on a bank-rail transfer so the recipient…
A central bank digital currency is the sovereign liability version of a token: the centra…
A chargeback is a card payment unwound after the fact: the cardholder disputes, the netwo…
A checkout embed is payment infrastructure as a drop-in: a snippet or component that rend…
A cold wallet is key storage that has never touched a network: keys generated and held on…
A confirmation policy is the rule for when a blockchain payment counts as paid: how many…
A cross-chain swap trades asset A on chain X for asset B on chain Y in one flow: the trad…
A decentralized exchange trades assets on-chain against liquidity pools rather than throu…
DEX routing is the machinery that turns 'I want A for B' into the cheapest legal path thr…
ERC-20 is the token standard of Ethereum and every EVM chain: a common interface (transfe…
A fiat on-ramp is the bridge from traditional money to crypto: card or bank in, token out…
A fiat peg is a commitment to hold a token's price to a national currency: one token, one…
Freeze authority is the on-chain power to halt a token's transfers for a given account or…
Gas is the price of changing a blockchain's state: every transfer, swap, and mint bids fo…
A hot wallet holds keys on a connected device: a browser extension, a phone, a server. Co…
HTTP 402 is 'Payment Required': a status code the web specified in the 1990s and never us…
The International Securities Identification Number: a twelve-character code that uniquely…
Know-your-customer is the identity layer regulated finance requires: who holds what, veri…
A Layer 2 is a network that settles to another chain (the Layer 1) while executing transa…
Lightning is Bitcoin's second layer for instant payments: channels between parties hold f…
A liquidity pool is a smart contract holding two (or more) assets that anyone can trade a…
The mempool is the waiting room: transactions broadcast to the network but not yet in a b…
A merchant account is the bank-side account a business needs to take card payments: the b…
Mint authority is the power to create new units of a token. On networks with program-leve…
A multisig wallet requires several keys to agree before funds move: two of three, three o…
A non-custodial service moves value without ever holding it: the platform routes, matches…
An off-ramp is the bridge back: crypto in, bank money out. On-ramps get the headlines, bu…
An oracle is the pipe between the chain and the world outside it: a price feed, a sports…
A payment link is a URL that is an invoice: open it and the payment surface is there, amo…
A payment processor is the company that moves card transactions for you: authorization, s…
A payment rail is the plumbing that moves value from a payer to a payee: ACH and SWIFT be…
Point of sale is where the customer pays in person: historically the till, now any screen…
A pre-IPO token tracks the value of shares in a private company held by a Special Purpose…
A price feed is the stream of prices that a tokenized asset, a checkout, or a settlement…
Proof of stake secures a chain by making validators lock value (stake) that is slashed if…
Reconciliation is matching money that arrived to the invoice, order, or ledger line it be…
A seed phrase is the master key in human form: twelve or twenty-four words from which a w…
Settlement finality is the moment a payment stops being reversible: the state where the m…
A webhook is the server-to-server tap on the shoulder: when an event happens, payment see…
Slippage is the gap between the price you were quoted and the price you got: your own tra…
A smart contract is a program deployed on a chain that anyone can call and no one can uni…
A special purpose vehicle is a legal entity created for one narrow job: in tokenized asse…
SPL token is the original token standard of the Solana blockchain: the equivalent of ERC-…
A stablecoin is a token engineered to hold the price of a reference asset, almost always…
A peg family is the set of tokens that track the same reference: the ten USD tokens, the…
A testnet is the dress rehearsal: the same rules, the same tooling, tokens worth nothing,…
Minting is issuance: the act that brings new tokens into existence, recorded on-chain, au…
A token standard is the interface contract every token on a chain follows: ERC-20 on EVM…
Token-2022 is Solana's programmable token standard: everything the classic SPL token does…
Tokenized gold is a token that represents a claim on allocated physical gold held in a va…
Tokenized silver is a claim on allocated silver in vaults that trades as a blockchain tok…
A tokenized stock is a blockchain token that tracks the price of an equity share: Apple a…
TRC-20 is the token standard of Tron: the EVM-style interface (Tron's virtual machine is…
The unspent transaction output is Bitcoin's accounting atom: coins exist as discrete outp…
A web3 name is a human-readable address for a wallet: you.u instead of 0x7f3a9c...42f1. N…
A white-label checkout is a payment flow that runs on a platform's machinery but presents…
A wrapped token is an asset represented on a chain it was not born on: Bitcoin locked in…
An extended public key is the watch-only half of a hierarchical wallet: from one xpub, a…