dApp 탐색

Dex223

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Dex223: a decentralized exchange for ERC-223 and ERC-20 tokens Dex223 is a decentralized exchange (DEX) on Ethereum built around the ERC-223 token standard. It lets users trade both ERC-223 and ERC-20 tokens, and it includes a converter that wraps any ERC-20 token as ERC-223 and back. The project is led by Dexaran, the author of ERC-223 and founder of Ethereum Commonwealth and Callisto Network. The exchange app is available at app.dex223.io on Ethereum mainnet. Several features are still on testnet or listed as coming soon, so check the current status of each feature before using it with real funds. What it is Most Ethereum tokens follow ERC-20, which uses an approve-then-transfer pattern. A known weakness of ERC-20 is that tokens sent directly to a contract that cannot handle them can be lost permanently. ERC-223 changes the transfer model so a receiving contract is notified and can reject tokens it does not support, which behaves more like sending ether. EIP-223 has Final status in the Ethereum improvement process, although adoption is still limited and it is not backward compatible with ERC-20. Dex223 is designed so that an ERC-20 token and its ERC-223 version can share liquidity, rather than splitting trading between two separate pools. Key features Swaps: trade ERC-20 and ERC-223 tokens from your own wallet. ERC-223 swaps do not need a separate token approval step. The project reports roughly 15% lower gas for ERC-223 swaps than for equivalent ERC-20 swaps. Pools: liquidity providers can add tokens to pools and earn trading fees. Token converter: the converter wraps an ERC-20 token as ERC-223 and unwraps it again. It is based on ERC-7417, a proposal that is still in Review status. Permissionless listing: an auto-listing contract lets anyone list a token without asking the team. Margin trading: an "encapsulated" margin trading design, where lenders set terms and collateral rules without relying on external price oracles. At the time of writing it runs on the Sepolia test app only, and mainnet margin trading and its audit are listed as future milestones. Borrow and lend: shown in the app as coming soon. The D223 token D223 is the project's ERC-223 token on Ethereum, with a maximum supply of 8 billion. The project says token holders are meant to share in trading and listing fees and to vote on platform settings such as fees and listing rules, with some of these functions still rolling out. D223 was sold in presale and public sale rounds from late 2023 through 2024, and BitMart announced a D223 listing in January 2025. No public sale is currently running. This listing does not recommend buying or holding D223. Supported networks and Vaulta Dex223 is live on Ethereum mainnet. The project has named Avalanche, BSC, EOS EVM (now Vaulta EVM), Celo, Base, Optimism, and Arbitrum as planned deployment targets, and says the plan may change. We could not confirm live liquidity on any chain other than Ethereum. Vaulta users should note that the public Vaulta EVM endpoints did not resolve when this listing was checked, so a Vaulta EVM deployment should not be assumed. Security Self-custody: you trade from your own wallet, and no KYC is required to use the contracts. Audits: the project describes its contracts as audited, but we did not find a published external audit report. The roadmap lists internal and external audits, and a separate margin module audit is still pending. Early-stage risk: liquidity is thin compared with large DEXs. Thin liquidity means higher price impact and a greater chance of failed or costly trades. Token risk: anyone can list a token, so a token appearing on Dex223 says nothing about its quality. Verify contract addresses yourself. How to get started Install an Ethereum wallet such as MetaMask and fund it with ETH for gas. Open app.dex223.io, confirm you are on Ethereum mainnet, and connect your wallet. Choose the tokens to swap, review the price impact and gas, and confirm. To try margin trading or other test features, use the separate test app on Sepolia with free test tokens. Pros and cons Pros One of the few DEXs built natively for ERC-223. Converter and shared liquidity between ERC-20 and ERC-223 versions. Permissionless listing and self-custodial trading. Cons Low liquidity and an early, partly testnet feature set. No published external audit report found. ERC-223 has limited wallet and tooling support. Multichain plans have slipped and are not yet confirmed. FAQ Is ERC-223 an official Ethereum standard? Yes. EIP-223 has Final status, though it is far less widely used than ERC-20. Is the D223 token sale still open? No public sale is currently running. Earlier presale and public rounds ran in 2023 and 2024. Is margin trading live? Only on the Sepolia testnet at the time of writing. Sources: Dex223 website, EIP-223, ethereum.org on ERC-223. Disclosure: BlockzHub has previously disclosed receiving financial incentives for educating the Dex223 community about the ERC-223 standard. The Dex223 website also lists Randall Roland, an editor of BlockzHub articles, as a co-founder and strategic advisor of Dex223. This listing is informational and is not financial advice. Please exercise caution. BlockzHub does not assume responsibility for any problems, damages, or losses that may result from using the services described here.

Ledger Hardware Wallet

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Ledger: hardware wallets for self-custody Ledger is a French company, founded in 2014, that makes hardware wallets: small devices that keep your private keys offline and ask you to confirm each transaction on the device itself. Ledger now calls these devices "signers". They work with Ledger's companion app, Ledger Wallet (renamed from Ledger Live in October 2025), and with many third-party wallets, including Anchor for Vaulta (formerly EOS). What it is A hardware wallet separates your keys from the computer or phone you use online. Your device signs a transaction internally and sends only the signature back, so malware on your computer cannot copy the key. If the device is lost or broken, you restore your accounts on a new device with the recovery phrase you wrote down at setup. Ledger devices are non-custodial: Ledger does not hold your keys or your funds. Current device lineup Nano S Plus: entry-level, USB-C, small screen. Nano X: adds Bluetooth and a battery for use with phones. Nano Gen5: launched in October 2025 with a 2.8-inch E Ink touchscreen, Bluetooth, NFC, and USB-C. Flex: larger E Ink touchscreen, Bluetooth and NFC. Stax: the largest curved E Ink touchscreen in the range, Bluetooth, NFC, and wireless charging. The original Nano S is discontinued. Prices change often, so check the official Ledger shop. Key features Secure Element chip: keys live in a certified secure chip. Ledger lists CC EAL6+ for the Nano S Plus, Nano Gen5, Flex, and Stax, and CC EAL5+ for the Nano X. Wide asset support: Ledger says its devices support more than 15,000 assets across 100+ chains, through Ledger Wallet and third-party wallets combined. Ledger Wallet app: manage accounts, install device apps, update firmware, and buy, swap, or stake some assets through partners. Third-party wallets: connect your device to wallets such as MetaMask, Electrum, and Anchor so the keys stay on the Ledger. Ledger Recover (optional): a paid subscription, run with Coincover, that backs up encrypted fragments of your recovery phrase with identity verification. It is opt-in and not required. Security history Ledger's devices have a strong security record, but the company has had incidents worth knowing about: July 2020 data breach: customer contact and shipping details from Ledger's e-commerce and marketing database were leaked. No funds or keys were exposed, but customers were targeted by phishing emails and letters afterward. December 2023 Connect Kit exploit: a malicious version of Ledger's Connect Kit library briefly affected some dApps that used it, draining funds from users who signed malicious transactions. Ledger published an incident report. Ledger Recover debate: the 2023 announcement raised concerns about whether firmware could extract a phrase. Ledger maintains that the feature is opt-in and requires user consent on the device. Using Ledger with Vaulta Install the EOS app on your Ledger through Ledger Wallet. Vaulta uses the same chain and signing format as EOS. Close Ledger Wallet, then open Anchor in a supported browser (Chrome, Edge, or Brave) or the Anchor desktop app. Enable contract data in the EOS app settings so the device can sign A token transfers and other contract actions. Import or create a Vaulta account that uses your Ledger key, then use it with Vaulta dApps such as Unicove. Ledger's own EOS page still uses EOS naming and does not mention Vaulta or A. Ledger Wallet itself does not manage Vaulta accounts, so you need a third-party wallet such as Anchor. Setup and best practices Buy only from the official Ledger shop or authorized resellers, and check the packaging. Download Ledger Wallet only from ledger.com. Write your 24-word recovery phrase on paper or metal. Never type it into a computer, phone, or website, and never share it. Set a PIN and keep firmware up to date. Read every transaction on the device screen before approving, especially contract approvals. Pros and cons Pros Keys stay offline in a certified secure chip. Very broad asset support and many compatible wallets. A range of devices from budget to touchscreen. Works with Vaulta through Anchor. Cons Firmware is closed source, so users must trust Ledger's security reviews. Past data leak and supply-chain incident. Vaulta needs a third-party wallet and extra setup steps. Costs money, unlike software wallets. FAQ Is Ledger Live gone? It was renamed Ledger Wallet in October 2025. It is the same companion app. Can I store A on a Ledger? Yes, by using the EOS app on the device with a Vaulta wallet such as Anchor. Do I need Ledger Recover? No. It is optional. Your recovery phrase alone is enough to restore your wallet. This listing is informational and is not financial advice. Please exercise caution. BlockzHub does not assume responsibility for any problems, damages, or losses that may result from using the services described here.

Blockchain.com

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Blockchain.com: crypto brokerage, self-custody wallet, and explorer Blockchain.com is one of the oldest companies in crypto. It began in 2011 as a Bitcoin block explorer and now offers a custodial trading account, a self-custody DeFi Wallet, an exchange, the Explorer, and rewards products. It is headquartered in London, with a US headquarters in Dallas since November 2025. What it is Blockchain.com combines two different kinds of product in one app, and it matters which one you use: Trading account (custodial): Blockchain.com holds your crypto for you. You can buy, sell, and convert with a bank card or bank transfer, and support can help with account access. In return you trust the company with your funds, and identity verification is required. DeFi Wallet (self-custody): you hold the keys through a recovery phrase. Blockchain.com cannot access or recover your funds. The DeFi Wallet connects to decentralized apps and, since 2026, offers perpetual futures through Hyperliquid and funding by card, Apple Pay, and Google Pay. Key features Buy and sell: purchase crypto with a card or bank transfer in supported countries. Exchange: an order-book exchange at exchange.blockchain.com for more active traders. Rewards: earn products, including fixed-term rewards, on some assets. Rates vary and are not guaranteed, and custodial rewards carry company risk. Explorer: the public block explorer for Bitcoin, Ethereum, and other chains, free to use without an account. Institutional services: custody and staking for businesses. Learning portal: beginner guides on crypto basics. Costs and risks Buying through the trading account usually includes a spread on top of any card or bank fee, so the price you pay can be higher than the market rate shown elsewhere. Network fees apply when you withdraw to an outside wallet. Products such as perpetual futures in the DeFi Wallet use leverage, which can lose more than a small price move would suggest and can lead to liquidation. Rewards products pay variable rates that depend on market conditions. Check the fee summary on each screen before you confirm, and start with small amounts while you learn how each product works. Regulation and company Blockchain.com holds a MiCA licence from Malta's financial regulator, granted in October 2025, covering custody, brokerage, and wallet services across the European Economic Area. Products and features vary by country. Some services are not available in the United States or other regions. In 2026 the company filed confidentially for a US public listing. That does not change how the app works for users. Security Account protection: PIN, biometric login, and two-factor authentication. Use an authenticator app rather than SMS where possible. Back up the DeFi Wallet: write down its recovery phrase offline. If you lose it, Blockchain.com cannot restore that wallet. Know the difference: assets in the trading account are custodial. For long-term holdings you may prefer the DeFi Wallet or a hardware wallet. Phishing: Blockchain.com users are frequent phishing targets. Log in only at blockchain.com, and never share your recovery phrase or 2FA codes. How to get started Download the Blockchain.com app or go to blockchain.com. Sign up with your email, set a strong password, and turn on two-factor authentication. Complete identity verification if you want to use the trading account. Create the DeFi Wallet separately if you want self-custody, and back up its recovery phrase. Use the Explorer to check transactions on public blockchains. Vaulta relevance We found no sign that Blockchain.com supports Vaulta (A) in its trading account or DeFi Wallet. Vaulta users should use a Vaulta wallet such as Anchor, and an exchange that lists A, to move funds in and out. Pros and cons Pros Long history and a well-known free block explorer. Choice of custodial and self-custody products in one app. Regulated in the EU under MiCA. Beginner-friendly buying and selling. Cons The trading account is custodial and requires identity verification. Card purchases and spreads can be costly. Features differ by country, and some are high risk, such as leveraged perpetual futures. No Vaulta (A) support. FAQ Is Blockchain.com a wallet or an exchange? Both. It offers a custodial trading account, a self-custody DeFi Wallet, and an exchange. Does Blockchain.com hold my keys? For the trading account, yes. For the DeFi Wallet, no: you hold the recovery phrase. Can I use the Explorer without an account? Yes. The Explorer is public and free. This listing is informational and is not financial advice. Please exercise caution. BlockzHub does not assume responsibility for any problems, damages, or losses that may result from using the services described here.

SimpleSwap

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SimpleSwap: instant crypto exchange without sign-up SimpleSwap is an instant cryptocurrency exchange service that has operated since 2018. You pick two coins, send the deposit, and receive the other coin at an address you choose. No account is needed for a standard swap, and SimpleSwap does not hold a balance for you. It also offers a fiat-to-crypto purchase option through a payment partner. SimpleSwap supports Vaulta (A), the token that replaced EOS. What it is SimpleSwap is a swap aggregator rather than an order-book exchange. It sources rates from liquidity providers and handles the conversion on your behalf. That makes it simple to use, but it also means you are trusting SimpleSwap and its partners with your funds while a swap is in progress, and compliance checks can pause a swap. It is available on the web and as mobile apps for iOS and Android, plus a direct Android APK download. Key features Large coin list: SimpleSwap says it supports more than 2,800 cryptocurrencies. No sign-up for swaps: an optional account adds history and loyalty features, but it is not required. Fixed or floating rate: a fixed rate is locked for about 20 minutes, and a deposit that arrives late may be refunded or filled at a new rate. A floating rate is an estimate that can move while the swap completes. Buy with a card: purchase around 30 coins with Visa or Mastercard through Mercuryo. The SimpleSwap FAQ lists a Mercuryo fee of about 3.95% plus a SimpleSwap fee of 1%. Card purchases go through Mercuryo's own verification. Loyalty program: the SimpleSwap Coin (SWAP) is used as the internal currency for the loyalty program, with benefits such as cashback for active users. Support: live chat and email support. Vaulta (A) support SimpleSwap lists Vaulta (A) on the Vaulta blockchain. The old EOS listing is marked as delisted, so search for Vaulta or A rather than EOS. When sending A to a Vaulta exchange account or receiving it, always check whether a memo is required, since a missing memo is a common cause of lost or delayed deposits. Security, KYC, and availability Compliance checks: SimpleSwap's AML and KYC policy says it can temporarily freeze any transaction for review and can ask for identity documents, source of funds, or a liveness check when risk triggers appear. Some users report swaps being held for long periods during reviews. Restricted countries: the terms of service exclude users in several jurisdictions, including the United States and its territories and the United Kingdom, among others. Check the current terms of service before you use it. Counterparty risk: while a swap is in progress, your funds are with SimpleSwap and its liquidity providers. Start with a small amount. Company details: the terms do not name a legal entity. App store listings show Simple Swap LTD. How to swap into Vaulta (A) Set up a Vaulta wallet, such as Anchor or Blocksfinity Authenticator, and note your account name. Open SimpleSwap and pick the coin you are sending and Vaulta (A) as the coin you want. Choose a fixed or floating rate and enter your Vaulta account name as the recipient, plus a memo if your destination needs one. Send the exact deposit shown, within the time window for fixed-rate swaps. Track the swap on the status page and confirm the A arrives in your account. Pros and cons Pros Fast, simple swaps without creating an account. Very wide coin coverage, including Vaulta (A). Fixed-rate option for predictable results. Card purchases available through Mercuryo. Cons Not available in the United States, the United Kingdom, and other restricted countries. Swaps can be frozen for compliance review, sometimes for a long time. Card purchases carry noticeably higher fees. Custodial during the swap, with limited public information about the operating company. FAQ Do I need an account? No. Standard swaps work without sign-up. An account is optional. Can I still swap EOS? The EOS listing is marked delisted. Use Vaulta (A), which replaced EOS at a 1:1 ratio in 2025. Is SimpleSwap anonymous? Not in every case. Any swap can be held for KYC review if it triggers risk checks. Disclosure: the SimpleSwap link on this page is a referral link, and BlockzHub may earn a commission when it is used. This listing is informational and is not financial advice. Please exercise caution. BlockzHub does not assume responsibility for any problems, damages, or losses that may result from using the services described here.

Uniswap

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Uniswap: the largest decentralized exchange protocol on Ethereum Uniswap is a decentralized exchange (DEX) protocol that lets anyone swap tokens directly from their own wallet, using liquidity pools instead of an order book. It launched on Ethereum in 2018 and now runs on many networks, including its own layer 2, Unichain. The Uniswap Labs web app at app.uniswap.org is the most common way to use it. What it is Uniswap is an automated market maker (AMM). Liquidity providers deposit pairs of tokens into pools, and traders swap against those pools at a price set by a formula. Providers earn a share of trading fees. Swaps are executed by smart contracts, so you keep custody of your tokens until the moment of the trade. The protocol is governed by holders of the UNI token, who vote on proposals such as fee settings and treasury use. Protocol versions v1 (November 2018): ETH to token pools only. v2 (May 2020): any ERC-20 to ERC-20 pair, price oracles, and flash swaps. v3 (May 2021): concentrated liquidity, letting providers choose a price range for more capital efficiency, and multiple fee tiers. v4 (January 31, 2025): a single "singleton" contract for all pools to cut gas costs, plus hooks: plugins that let developers customize pool behavior, such as dynamic fees or limit orders. Over 150 hooks existed at launch. Key features Swaps: trade thousands of tokens with routing across v2, v3, and v4 pools. Liquidity provision: create or join pools and earn fees, with the risk of impermanent loss. Many networks: Ethereum, Unichain, Arbitrum, Base, Optimism, Polygon, BNB Chain, Avalanche, Celo, Linea, and others, with Solana swaps in the web app. Unichain: an Ethereum layer 2 built for DeFi, live on mainnet since February 2025. Uniswap Wallet: a self-custody mobile and browser wallet from Uniswap Labs. Newer products: Uniswap Labs added features in 2026 such as token auctions in the web app and an Earn product powered by Morpho. Availability can vary by region. Fees and governance In December 2025, UNI holders approved the "UNIfication" proposal with overwhelming support. It switched on protocol fees for a set of pools, using that revenue to buy and burn UNI, and burned 100 million UNI from the treasury. Around the same time, Uniswap Labs set its interface fee to zero. Liquidity provider fees still apply to every swap, and you also pay network gas. Regulation The US Securities and Exchange Commission sent Uniswap Labs a Wells notice in April 2024, then closed its investigation without enforcement action in February 2025. Rules for DeFi still differ by country, and the web app restricts some tokens in some regions. Security Self-custody: you trade from your own wallet, and Uniswap never holds your funds. Token risk: anyone can create a pool for any token, including scams and copycat tokens. Check the contract address, and treat unverified tokens with caution. Approvals: trading ERC-20 tokens requires approvals. Revoke approvals you no longer need. Slippage and MEV: large or illiquid trades can move the price. Set a sensible slippage limit. Phishing: use the real app.uniswap.org address. Fake Uniswap sites and "airdrop" offers are common. How to get started Install a wallet such as MetaMask or the Uniswap Wallet and fund it with the native token for fees. Open app.uniswap.org, connect your wallet, and pick a network. Choose the tokens, enter the amount, and review the quote, price impact, and gas. Approve the token if asked, then confirm the swap in your wallet. Uniswap does not run on Vaulta. To move value between Vaulta and Ethereum, users typically go through a centralized exchange or an instant swap service. Pros and cons Pros Deep liquidity for most Ethereum and EVM tokens. Self-custodial and permissionless. Open-source contracts with a long track record. No interface fee on the Uniswap Labs app. Cons Gas costs on Ethereum mainnet can be high. Anyone can list tokens, so scam tokens appear. Liquidity providers face impermanent loss. No support for Vaulta or other non-EVM chains besides Solana swaps. FAQ Is Uniswap v4 live? Yes. It launched on January 31, 2025. What is Unichain? An Ethereum layer 2 network from Uniswap Labs, live on mainnet since February 2025. Does Uniswap charge a fee? Each pool charges a liquidity provider fee, and some pools now also send a protocol fee to the UNI burn. The Uniswap Labs interface fee is currently zero. Sources: Uniswap v4 announcement, UNIfication proposal, SEC investigation closed. This listing is informational and is not financial advice. Please exercise caution. BlockzHub does not assume responsibility for any problems, damages, or losses that may result from using the services described here.

MetaMask

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MetaMask: self-custody wallet for EVM chains, Solana, and Bitcoin MetaMask is one of the most widely used self-custody crypto wallets. It started in 2016 as an Ethereum browser extension and is now available as an extension and as mobile apps. It holds Ethereum and EVM-chain assets, Solana, and Bitcoin, connects to decentralized apps, and includes built-in swaps and other financial features. You hold the keys: MetaMask cannot access or recover your funds. What it is MetaMask was built by Consensys. In September 2026, Consensys Software Inc. announced it will split into two companies: the existing company becomes MetaMask, focused on the consumer wallet, and a new Consensys takes Linea, the Besu and Teku clients, and the institutional business. The split is expected to finish by the end of 2026. The wallet itself continues as before. MetaMask now uses multichain accounts, where one account manages EVM, Solana, and Bitcoin addresses together. Native Solana support arrived in 2025, and native Bitcoin support followed in December 2025 with native SegWit addresses. Key features Multichain wallet: Ethereum and EVM networks such as Linea, Base, Arbitrum, Optimism, Polygon, and BNB Chain, plus Solana and Bitcoin. You can add other EVM networks manually. dApp connections: connect to DeFi, NFT, and gaming apps and sign transactions. Swaps and bridges: built-in swap and bridge aggregators, with a fee included in the quote. Security alerts: transaction simulation and alerts that warn about known malicious contracts and phishing sites. Hardware wallet support: pair Ledger, Trezor, and other devices so keys stay offline. Snaps: third-party plugins that add features and extra networks. mUSD: MetaMask's own dollar stablecoin, issued by Bridge (a Stripe company) on Ethereum and Linea. MetaMask Card and other services: a payment card for spending crypto, perpetual futures, and yield products. Availability varies by country, and several of these are offered through third parties. Security Secret Recovery Phrase: your 12-word phrase controls every account in the wallet. Write it down offline and never share it. MetaMask staff will never ask for it. Hot wallet risk: keys live on an internet-connected device. For larger amounts, pair a hardware wallet. Signature phishing: malicious sites often ask for token approvals or off-chain signatures that let them drain funds. Read every request and revoke approvals you no longer need. Recent incident: on September 30, 2026, MetaMask disclosed a security incident affecting part of its infrastructure and began exiting its staking validators. It said there was no indication that wallets or customer funds were affected. Check MetaMask's official news page for updates. Rewards and tokens: MetaMask says it has no plans for a MASK token. Treat any "MetaMask token airdrop" as a scam. MetaMask and Vaulta MetaMask does not support native Vaulta (formerly EOS) accounts by default. Two options exist: Vaulta Wallet Snap: Unicove, the Greymass web wallet, publishes a guide to using a MetaMask Snap to sign Vaulta transactions. Vaulta EVM: the EVM layer formerly called EOS EVM uses chain ID 17777 with A as its native token. When this listing was checked, the documented public RPC and explorer addresses did not resolve, so confirm current endpoints in the official Vaulta documentation before adding the network. For everyday Vaulta use, a native Antelope wallet such as Anchor is usually simpler. How to get started Download MetaMask only from metamask.io or the official app stores. Create a new wallet, set a password, and write down your Secret Recovery Phrase offline. Choose your network, fund your account, and keep some native token for fees (for example ETH on Ethereum). Connect to dApps through their "Connect wallet" button and review each request. Pros and cons Pros Supported by nearly every EVM dApp. Now covers Solana and Bitcoin in the same wallet. Built-in security alerts and hardware wallet support. Free to install. Cons Hot wallet, so it is a frequent phishing target. Swap and bridge fees are higher than going direct. Card and financial features depend on your country. No native Vaulta account support without a Snap. FAQ Is MetaMask custodial? No. Your keys are stored encrypted on your device. Does MetaMask support Bitcoin and Solana? Yes, natively, through multichain accounts. Is there a MetaMask token? MetaMask says it has no plans for a MASK token. This listing is informational and is not financial advice. Please exercise caution. BlockzHub does not assume responsibility for any problems, damages, or losses that may result from using the services described here.