Forgotten ΞTH

IDEX v1 IDEX launched in October 2017 as the first hybrid DEX combining off-chain order matching with onchain settlement. Originally branded as Aurora, it grew to process over 4 million orders per day during the ICO boom. IDEX v1 was superseded by v2 in fall 2020.

EtherDelta v2 EtherDelta launched July 12, 2016 as the first widely-used DEX for ERC-20 tokens. It became the go-to venue for ICO token trading in 2017, peaking at ~$10M daily volume. On December 20, 2017, attackers hijacked its DNS to steal $1.4M from users. In November 2018, the SEC charged its creator with operating an unregistered exchange, the first such action against a DEX.

Token.Store Launched July 30, 2017 as a fully onchain DEX with both onchain order matching and settlement. Processed over 500,000 transactions across 100,000+ accounts and later expanded to EOS. The anonymous team shut it down on June 22, 2020, publishing a farewell citing the rise of AMMs like Uniswap as having made order-book DEXs obsolete.

EtherDelta v1 An earlier iteration of the EtherDelta exchange (December 2016). Multiple contract versions were deployed, each requiring users to manually withdraw and redeposit. Superseded by the well-known v2 contract at 0x8d12A197.

SingularX SingularX (by SingularDTV) launched November 2017 as a DEX for their blockchain entertainment economy. Based on EtherDelta's architecture, it saw over $3M in 24h volume during the CENNZ listing. SingularDTV rebranded to Breaker in 2019 but failed to deliver on its decentralized Netflix vision.

Unknown DEX An unverified EtherDelta-style DEX contract from September 2017. The protocol behind this contract has not been identified. The source code is not published on Etherscan but follows the standard deposit/withdraw pattern.

Decentrex An EtherDelta-fork DEX that was notably served directly from GitHub Pages (circa 2017). Minimal presence online, one of many EtherDelta forks from the 2017-2018 era that attracted small trading communities.

Joyso Launched in Taiwan, May 2018 after a March 2018 ICO, combining off-chain matching with onchain settlement. Partnered with CoolBitX to offer the first cold-storage DEX trading experience.

ETHEN A decentralized exchange for ERC-20 tokens, founded in 2018 and headquartered in Saint Petersburg, Russia. Used a custom contract design with a direct balances mapping rather than the standard EtherDelta token-tracking pattern.

Bitcratic An EtherDelta-style DEX with off-chain orderbook and onchain settlement (2018). One of the more active EtherDelta forks during the post-ICO trading boom.

EtherC Claimed to be the first DEX with gas-free trading via its ETHERCToken (EET) reimbursement system (2018). An unusual approach where gas costs were subsidized through the platform's own token.

EnclavesDex A DEX and early liquidity aggregator on Ethereum (June 2018) that routed trades through both its own order book and EtherDelta. An early precursor to the aggregator model later popularized by 1inch.

ENS Old Registrar The original .eth registrar launched May 4, 2017 (Star Wars Day) after an earlier March launch was aborted due to a bug. Used Vickrey sealed-bid auctions where winning bids were locked in deed contracts. Replaced by the permanent registrar on May 4, 2019; names not migrated by May 2020 returned to the pool, but deed deposits can still be reclaimed via releaseDeed().

Trend (TND) Trend (TND) ran a 2018 ICO via the OpenZeppelin RefundableCrowdsale + CryptoHuntIco template. Soft cap missed, the contract finalized into refund mode, and ~28 ETH still sits in the sibling RefundVault. Single-tx claim: claimRefund() on the crowdsale returns your original deposit.

Global ICO Token (GLIF) Global ICO Token (GLIF) reused the OpenZeppelin RefundableCrowdsale + CryptoHuntIco template for its 2018 sale. Soft cap missed (raised ~896 ETH, refunded most), ~16 ETH still sits unclaimed in the sibling RefundVault. Standard claimRefund() returns your deposit.

CryptoHunt (CH) CryptoHunt is a blockchain treasure-hunting game whose 2018 ICO didn't reach its soft cap. The contract is the canonical CryptoHuntIco source — OpenZeppelin RefundableCrowdsale pattern, public claimRefund() routing to the sibling RefundVault. ~10 ETH still claimable.

Alttradex (ATXT) Alttradex Token (ATXT) ran an October 2017 ICO using the OpenZeppelin RefundableCrowdsale + CryptoHuntIco template. Soft cap missed; finalize() routed the vault into refund mode. ~5 ETH still in the sibling RefundVault. Single-tx claimRefund() returns your deposit.

Etcetera (ERA) Etcetera (ERA) was a 2018 ICO that used the OpenZeppelin RefundableCrowdsale + CryptoHuntIco template. The sale didn't reach its goal; the contract is in refund mode. ~5 ETH still in the sibling RefundVault waiting for stragglers.

Enkronos Token (ENK) EnkronosToken (ENK) — 2018 ICO via the OpenZeppelin RefundableCrowdsale + CryptoHuntIco template. Soft cap missed. ~1 ETH still in the sibling RefundVault. Standard claimRefund() returns your original deposit.

DeskBell (DBT) DeskBell Token (DBT) ran a 2018 ICO via the OpenZeppelin RefundableCrowdsale (DeskBellPresale) template. Soft cap missed; ~4 ETH still sits in the sibling RefundVault. Standard single-tx claimRefund() returns your deposit.

Quintessence (QST) Quintessence Token (QST) — 2018 ICO using the OpenZeppelin RefundableCrowdsale (DeskBellPresale-bytecode) template. ~1.5 ETH still in the sibling RefundVault. Standard claimRefund() returns your deposit.

Deck Coin (DEK) Deck Coin (DEK) — 2017 ICO using the OpenZeppelin RefundableCrowdsale template. Soft cap missed. ~1.2 ETH still in the sibling RefundVault. Standard claimRefund() returns your deposit.

Tokpie (TKP) Tokpie (TKP) — exchange-token ICO from 2018 using the OpenZeppelin RefundableCrowdsale template. The crowdsale didn't reach its soft cap; ~1.2 ETH still sits in the sibling RefundVault. Standard claimRefund() returns your original deposit.

GlobalSpy (SPY) GlobalSpy (SPY) — 2018 ICO using the OpenZeppelin RefundableCrowdsale template. ~1 ETH still in the sibling RefundVault. Standard claimRefund() returns your original deposit.

BigToken (BTK) BigToken (BTK) ran a 2018 ICO via the BigTokenCrowdSale (OpenZeppelin RefundableCrowdsale variant). Soft cap missed (raised ~927 ETH, refunded most). ~6 ETH still in the sibling RefundVault. Standard claimRefund() returns your deposit.

WINiota (WIT) WINiota Token (WIT) — June 2018 ICO whose crowdsale bytecode is identical to the FNT (Friend Network) RefundableCrowdsale. Soft cap missed; ~5 ETH still in the sibling RefundVault. Standard claimRefund() returns your deposit.

Grapevine (GVINE) Grapevine (GVINE) Crowdsale — 2018 ICO using the OpenZeppelin RefundableCrowdsale template. Soft cap missed; ~1 ETH still in the sibling RefundVault. Standard claimRefund() returns your deposit.

IRB Tokens (IRB) IRB Tokens ran a 2018 pre-crowdsale via the OpenZeppelin RefundableCrowdsale template. Soft cap missed, the contract finalized into refund mode, and ~5 ETH still sits in the sibling RefundVault for the long tail of contributors. Standard single-tx claim: claimRefund() on the crowdsale returns your deposit through the vault.

CamToken (CAM) CamToken ran a 2018 ICO via the OpenZeppelin RefundableCrowdsale template. Soft cap missed and the contract finalized into refund mode; ~3 ETH still sits in the sibling RefundVault. Single-tx claim: call claimRefund() on the crowdsale and the vault returns your original deposit.

LINDA Token (Presale) LINDA (LNDA) ran a two-stage 2018 token sale: a presale and a main sale, both using the OpenZeppelin RefundableCrowdsale template against the same LINDA token. The presale missed its soft cap and ~3 ETH still sits in this presale RefundVault. Standard claimRefund() returns your deposit.

LINDA Token (Main Sale) The main sale stage of LINDA (LNDA), deployed alongside a separate presale contract. The main sale also missed its soft cap and finalized into refund mode; ~2.7 ETH still sits in the sibling RefundVault. Standard claimRefund() returns your deposit.

Monoreto (MNR) Monoreto ran its 2018 ICO via the OpenZeppelin RefundableCrowdsale template. Soft cap was missed and the contract finalized into refund mode; ~2.5 ETH still sits in the sibling RefundVault. Standard single-tx claim: claimRefund() on the crowdsale returns your original ETH through the vault.

Unverified ICO Refund (79c5) An unverified 2018 ICO crowdsale built on the OpenZeppelin RefundableCrowdsale template. Source is not published, but bytecode-level selectors match the canonical pattern, and Tenderly simulation confirms claimRefund() works for current depositors. ~1.5 ETH still sits in the sibling RefundVault.

TREECHAIN NETWORK (TREECOIN) TREECHAIN NETWORK ran a 2018 ICO via the OpenZeppelin RefundableCrowdsale template. Soft cap missed and the contract finalized into refund mode; 1 ETH remains in the sibling RefundVault for a single straggler. Standard claimRefund() returns the deposit.

Lendsbay Token (LBT) Lendsbay (LBT) ran a 2018 ICO via the OpenZeppelin RefundableCrowdsale template. Soft cap missed; ~0.85 ETH still in the sibling RefundVault. Standard claimRefund() returns your deposit.

FURT COIN (FRT) FURT COIN ran a 2018 ICO via the OpenZeppelin RefundableCrowdsale template. Soft cap missed; ~0.7 ETH still in the sibling RefundVault for two contributors. Standard claimRefund() returns your deposit.

Kryptopy Token (KPY) Kryptopy (KPY) ran a 2018 ICO via the OpenZeppelin RefundableCrowdsale template. Soft cap missed; ~0.6 ETH still in the sibling RefundVault. Standard claimRefund() returns your deposit.

DigitizeCoin Presale (DTZ) DigitizeCoin (DTZ) ran a 2018 presale built on the OpenZeppelin RefundableCrowdsale template. The contract uses a 3-arg TokenPurchase event variant (PallyCoin family) but the refund flow is canonical. Soft cap missed and the contract finalized into refund mode; ~1.1 ETH still sits in the sibling RefundVault. Standard claimRefund() returns your deposit.

PallyCoin (PAL) Merunas Grincalaitis's December 2017 PallyCoin ICO used a custom RefundableCrowdsale where claimRefund() requires the depositor to STILL HOLD their full PAL allocation (the call also burns the original PAL via token.refundTokens). Soft cap missed; ~43 ETH remains in the RefundVault. ~40.6 ETH is claimable by 35 stragglers who never sold their PAL; ~2.7 ETH is locked for users who sold some tokens (Neufund-style token gating).

PallyCoin Fork (PAL2) A 2018 PallyCoin fork by Manoj Patidar reusing the same RefundableCrowdsale + token-gated refund pattern, against a separate PAL2 token (0xca16d101). Soft cap missed; ~3.77 ETH still in the RefundVault, all claimable by 5 stragglers who still hold their full PAL2 allocation. Standard claimRefund() returns your deposit; you must hold PAL2 ≥ tokensBought.

ForegroundTokenSale (DEAL) Foreground's November 2017 DEAL token sale used a custom finite-state crowdsale (Prepared → Configured → Started → Ended → Finalized → Refunding) and held ETH directly in the crowdsale contract — no separate vault. The sale ended in the Refunding state and ~12.15 ETH still sits in the contract. Single-tx claim: claimRefund() reads purchases[msg.sender].weiBalance and transfers it back. No token gating.

VuePayTokenSale (VUP) VuePay's October 2017 VUP token sale used a custom crowdsale that holds ETH directly in the contract. Soft cap missed and the owner enabled refunds (allowRefund flag). ~1.21 ETH remains for 4 contributors. Single-tx claim: claimRefund() reads ETHContributed[msg.sender] and transfers it back.

ChickenChef Abandoned SushiSwap-MasterChef-style yield farm from the 2020 DeFi summer. Pool 0 accepts direct WETH stakes. The farm went silent in late 2024 and ~48 WETH still sits in the contract for 7 stakers. Single-tx claim: emergencyWithdraw(0) returns your full WETH stake. Skips reward minting (which often breaks first in abandoned chains).

GovTreasurer Abandoned MasterChef-style yield farm. Pool 2 is the WETH staking pool, holding ~19 WETH for 21 stakers. Dormant since late 2023. Single-tx claim: emergencyWithdraw(2) returns your full WETH stake.

MysteryMan Abandoned MasterChef-style farm. Pool 0 accepts direct WETH stakes; ~4 WETH sits in the contract for 2 stakers. Single-tx claim: emergencyWithdraw(0) returns your full WETH stake.

MasterStar Abandoned MasterChef-style farm. Pool 0 accepts direct WETH stakes; one staker holds the full claimable 3 WETH. (The contract also holds an additional 0.1 WETH that was sent directly to the contract address and is not user-claimable.) Single-tx claim: emergencyWithdraw(0) returns your full WETH stake.

BDPMaster Abandoned MasterChef-style farm. Pool 1 accepts direct WETH stakes; ~1.74 WETH sits in the contract for 8 stakers. The standard withdraw() flow is BROKEN — the contract tries to mint BDPToken rewards, but BDPToken's minter role was revoked, so withdraw() reverts. Use emergencyWithdraw(1) instead — it skips reward minting and returns your stake cleanly.

Ahoolee Token Sale Ahoolee's September 2017 ICO. The sale collected ~581 ETH against a 3,030 ETH soft cap and finalized in refund mode. 191 ETH still sits in the contract waiting for the long tail of stragglers — 107 of 323 contributors haven't called refund() yet. Single-tx claim: refund() on the contract returns your original ETH deposit.

TruckHash Token Sale TruckHash's 2018 ICO missed its soft cap; owner enabled refundAllowed mode. Per-user balance lives in weiBalances(addr). Public refund() returns the deposit; no further admin action needed.

Jincor Token ICO Jincor's late-2017 ICO did not reach soft cap; refund mode is automatic. Per-user balance is tracked in deposited(addr); public refund() returns the deposit and emits Refunded(holder, amount).

AgroTechFarm Crowdsale AgroTechFarm's 2018 crowdsale failed; the owner switched state to Refunding. Per-user balance is in balances(addr). Public refund() returns the deposit while the contract is in Refunding state.

Luckchemy Crowdsale Luckchemy's 2018 ICO finished without hitting soft cap. Per-user balance is in deposits(addr); public refund() returns the deposit.

HONG HONG is a 2016 token-creation contract with a built-in ICO refund path. The verified source tracks each contributor's original ETH in weiGiven and refundMyIcoInvestment() returns that tracked deposit while the fund remains unlocked. The balance file is reconstructed from creation/refund events and filtered to wallets that still hold HONG units required by the contract.

ArbitrageETHStaking August 2018 PoWH3D-style staking pool. Users sent ETH and paid a 2% fee that boosted the pool's globalFactor. Single-tx claim: withdrawAll() returns msg.sender's accumulated balance.

VLB Token Velix.AI ran its December 2017 ICO via the OpenZeppelin RefundableCrowdsale pattern. The sale missed its 5,000 ETH soft cap (raised ~4,900 ETH), the contract finalized into refund mode, and most depositors clawed back over the following months. ~81 ETH still sits in the sibling RefundVault waiting for the long tail of stragglers. Single-tx claim: claimRefund() on the crowdsale delegates to the vault and returns your original deposit.

VLB / Lino A Wings-incubated 2018 ICO that reused the same VLB-style RefundableCrowdsale code. The USD-denominated soft cap was missed, the contract finalized into refund mode, and ~17 ETH remained in the sibling RefundVault unclaimed. Same single-tx pattern: claimRefund() on the crowdsale returns your deposit through the vault.

Friend Network Token FriendNetwork ran a 2018 ICO with a 25,000 ETH minimum cap. Only ~3,700 ETH was raised, finalize() routed the contract into refund mode, and ~16 ETH still sits in the sibling RefundVault for buyers who never came back to claim. Standard OZ pattern: claimRefund() on the crowdsale and the vault sends your original ETH back.

Confideal Confideal was a smart contract platform letting non-technical users create and manage escrow deals on Ethereum without coding. Conducted an ICO in November 2017 for the CDL token, with a Bittrex listing deal. Included an arbitration module for dispute resolution. Failed to gain adoption and went inactive by 2019.

DADA Collectible A collaborative digital art platform. Deployed its "Creeps & Weirdos" NFT collection on October 5, 2017, after CryptoPunks but before CryptoKitties. Featured 108 unique pieces by 30 artists and was the first NFT project to implement artist royalties coded directly into the smart contract, using a modified CryptoPunks contract.

MoonCatRescue Deployed August 9, 2017, one of the earliest NFTs on Ethereum, before the term "NFT" or ERC-721 existed. Features 25,440 generative pixel art cats with a proof-of-work minting mechanism. Only 3,365 cats were rescued in 2017; on March 12, 2021 crypto-archaeologists rediscovered it and all remaining 19,000+ cats were rescued within hours. Note: ~100 ETH from the genesis cat is permanently stuck at address(0) due to a contract bug. Users with pending adoption requests must cancel them to reclaim escrowed ETH.

Fomo3D Long Players buy keys that reset a countdown timer; the last buyer wins the jackpot. Round 1 ended August 2018 paying 10,469 ETH (~$2.8M), won via a block-stuffing attack that prevented competing transactions. At peak, the contract held over $43M. Note: the isHuman modifier means smart contract wallets cannot withdraw, only EOAs.

Fomo3D Quick A faster-round variant of Fomo3D (2018) with shorter countdown durations. Same key-purchase mechanic and dividend system as Fomo3D Long. Note: isHuman modifier, so smart contract wallets cannot withdraw.

Fomo3D Short Another variant of Fomo3D (2018). Same core mechanics: key purchases, countdown timer, dividend distribution. Note: isHuman modifier, so smart contract wallets cannot withdraw.

FoMo3Dshort v2 An independent FoMo3D Short clone deployed July 20, 2018, distinct from the canonical 0x52083b1a deploy. Standard PlayerBook key-purchase / countdown / dividend mechanics. ~137 ETH remained in player vaults. Note: isHuman modifier.

FoMo3Dlong v2 A FoMo3D Long clone deployed August 6, 2018, distinct from the canonical 0xA62142 deploy. Partially insolvent: the largest player vault exceeds the contract balance and cannot be withdrawn, but ~110 smaller players can claim ~7.7 ETH combined. Note: isHuman modifier.

FoMoJP A Japanese-themed FoMo3D fork from July 31, 2018. Standard plyr_/getPlayerInfoByAddress/withdraw ABI. ~76 ETH still in player vaults. Note: isHuman modifier.

F3DPLUS A FoMo3D variant deployed July 22, 2018, branding itself as a "PLUS" version with the standard PlayerBook mechanics. ~35 ETH in player vaults. Note: isHuman modifier.

SnowStorm A FoMo3D fork deployed July 29, 2018 with the standard key-buy / countdown / vault mechanics. ~35 ETH in player vaults. Note: isHuman modifier.

SnowStorm B A second SnowStorm deployment (July 29, 2018) with identical bytecode to the primary contract. ~25 ETH in player vaults. Note: isHuman modifier.

Fomo A minimally-named FoMo3D fork deployed August 20, 2018. Standard PlayerBook ABI and isHuman gating. ~15 ETH in player vaults.

CryptoPhunks Marketplace CryptoPunks-style marketplace deployed December 2021 for the CryptoPhunks NFT collection (a flipped-pixel parody by NotLarvaLabs). Sale proceeds and outbid bids accumulate in pendingWithdrawals; sellers and outbid bidders call withdraw() to pull their ETH out. ~107 ETH still waiting.

CryptoCats Marketplace A late-2017 marketplace contract for the CryptoCats NFT collection — one of the early CryptoPunks clones. Sale proceeds and outbid bids accrue in pendingWithdrawals; sellers and outbid bidders call withdraw() (no args). ~45 ETH still in the contract.

CryptoCats v2 March 2018 CryptoCats deployment (contractVersion==2, predecessor of the v3 marketplace at 0x19c320b4). withdraw() drains your pendingWithdrawals balance from buyCat() sales. The contract holds ~44 ETH but only ~9 ETH is user-claimable; the rest accumulated from getCat() calls in 2021 and is permanently stuck due to a bug v3 explicitly fixed.

LD3D Official An August 2018 FoMo3D fork branded "LD3D Official" — standard PlayerBook key-buy mechanics with plyr_/getPlayerInfoByAddress/withdraw. ~87 ETH remained in player vaults. Note: isHuman modifier — only EOAs can withdraw.

Bingo4Beast Long Official An August 2018 FoMo3D-derivative game (B4B token). Non-standard player enumeration (plyr_(uint256) reverts with a custom guard) but the rest of the FoMo3D ABI works — getPlayerInfoByAddress + withdraw. ~120 ETH still in player vaults.

Bingo4Beast Long Official (deploy 2) Second deployment of the Bingo4Beast B4B game (August 2018). Partially insolvent: only ~57% of contract balance (56 ETH) is recoverable across 571 holders — claim amounts wei-exact verified via Tenderly trace, since getPlayerInfoByAddress returns inflated round-mask values that exceed actual withdraw() payouts.

FoMo3D Ultra August 2018 FoMo3D-derivative "Ultra" variant (unverified source). withdraw() works for individual player vaults — ~163 holders can claim ~131 ETH combined. The remaining ~338 ETH lives in round-end jackpot/community pots not mapped to per-user balances. Claim amounts wei-exact verified via Tenderly.

SpankChain Auction December 2017 Dutch auction for the SPANK token (the SpankChain adult-entertainment platform). 463 ETH still in the contract — 100% recoverable across 105 buyers; the largest single buyer is owed ~287 ETH. Source unverified, so per-address refund amounts are wei-exact computed via debug_traceCall on each holder.

Presale Pool (LINO/HEALP/Bulleon) An early-2018 ICO presale pool (unverified) holding ~91 ETH from 65 contributors plus tokens from Lino Network, Etheal, and Bulleon. Per-contributor refund computed wei-exact via debug_traceCall.

Presale Pool (OMG/Streamr/VIU) A 2017 Cintix-style ICO presale pool (unverified) using `contribute(address)`. Holds ~42 ETH plus tokens from OMG Network, Streamr (XDATA), and VIU. One large contributor accounts for the full refund. 100% coverage via debug_traceCall.

Status Buyer June 2017 SNT (Status Network Token) ICO pooled-buy contract. Holds ~76 ETH from 14 contributors who never withdrew their share. withdraw() returns the contributor's pro-rata refund. Wei-exact verified via debug_traceCall.

Presale Pool 0x48c128 An early-2018 ICO presale pool (unverified) holding ~98 ETH for 7 contributors. withdrawAll() returns each contributor's full deposit; 100% recoverable, wei-exact verified via debug_traceCall.

Presale Pool 0xff2c68 A May 2018 ICO presale pool (unverified) holding 50 ETH for one large contributor. withdrawAll() returns the full deposit; 100% recoverable.

SAW Games Pass A 2022 NFT mint contract (verified ERC-721) where the contract owner accumulated 39 ETH in mint proceeds and never called withdraw(). 1 holder (the owner) can recover 100%.

Presale Pool 0xb9906c An April 2018 ICO presale pool (unverified) — small remaining balance after most contributors withdrew. 2.5 ETH recoverable across 2 holders via withdrawAll().

Presale Pool 0xd6770a A mid-2018 ICO presale pool (unverified) holding ~37 ETH across 23 contributors. withdrawAll() returns each contributor's deposit; 100% recoverable, wei-exact verified.

Presale Pool 0x796dbc A 2018 ICO presale pool (unverified) holding ~35 ETH for 3 contributors. withdrawAll() returns each deposit; 100% recoverable.

Presale Pool 0x50c19f A 2018 ICO presale pool (unverified) holding ~34 ETH for 2 large contributors. withdrawAll() returns each deposit; 100% recoverable.

Presale Pool 0x6f40d9 A 2018 ICO presale pool (unverified) holding ~28 ETH across 285 contributors — the largest by holder count in this batch. withdrawAll() returns each deposit; 100% recoverable.

Ambassadors Fund A 2019 OpenZeppelin PaymentSplitter holding 17.5 ETH across 12 fund-share holders. release(address) pays each beneficiary their pro-rata share. Pass your own address to release().

JustHodlIt A 2018 ICO contribution pool (unverified). 8 contributors can claim 16 ETH via withdrawAll() (78% — the rest is admin/fee buckets, not user-claimable).

GameFair A 2018 gambling/redemption contract (unverified). Partially insolvent — 4 holders can claim 14 ETH against 13 ETH of contract balance via redeem(). Late redeemers will revert.

IBC Lottery An August 2018 IBC-themed lottery game (unverified). 8 holders can claim 12.4 ETH via withdraw() — 97% coverage.

Contribution Pool A 2017 contribution pool holding 10.6 ETH for one large contributor. withdraw() returns the full deposit.

EtherDelta v0 The earliest EtherDelta contract, deployed around August 2016 using Solidity v0.3.6, one of the very first DEX contracts on Ethereum, deployed just months after the DAO hack. The team iterated through multiple versions (Oct 2016, Feb 2017) before the well-known v2; each upgrade required manual migration.

Neufund EtherToken Founded in 2016 in Berlin, Neufund conducted the world's first public offering of tokenized equity on Ethereum in November 2018. Deployed over EUR 20M in capital for 11,000 investors from 123 countries; flagship case Greyp Bikes completed the full cycle from tokenization to Porsche acquisition. Shut down January 17, 2022 after years of regulatory uncertainty with BaFin.

Neufund Neufund ran two ICBM LockedAccount escrows: a v1 contract from Nov 2017 (0xb1E4675f...) and a post-ICBM v2 contract from Nov 2018 (0xea4df6f4...) that received migrations from v1. Each holds per-investor ETH-T against a separate EtherToken and tracks a Neumark (NEU) burn debt. All 540-day lock periods expired in 2019. To recover ETH: approveAndCall on NEU targeting the user's specific LockedAccount (burns NEU + returns ETH-T in one tx), then withdraw ETH-T from the matching EtherToken. The site auto-detects which contract a user belongs to.

DigixDAO DigixDAO launched in March 2016 as one of Ethereum's first DAOs, raising 466,648 ETH in a crowdsale that filled its hard cap in just 12 hours. The DAO funded development of Digix's gold-backed DGX token, but after years of limited adoption, token holders voted 97% in favor of dissolution via Project Ragnarok in January 2020. The Acid refund contract was deployed in March 2020, allowing any DGD holder to permanently burn their tokens for a pro-rata share of the treasury at roughly 0.193 ETH per DGD.

Tessera: Party of Living Dead Fractional Art (later Tessera) fractionalized NFTs into ERC-20 tokens. When a buyout auction completed, fraction holders could burn tokens for proportional ETH via cash(). Tessera shut down in May 2023; the frontend is dead but contracts remain functional.

Tessera: Dingaling BAYC Sweep Fractional Art (later Tessera) fractionalized NFTs into ERC-20 tokens. When a buyout auction completed, fraction holders could burn tokens for proportional ETH via cash(). Tessera shut down in May 2023; the frontend is dead but contracts remain functional.

Tessera: ZombieCats Fractional Art (later Tessera) fractionalized NFTs into ERC-20 tokens. When a buyout auction completed, fraction holders could burn tokens for proportional ETH via cash(). Tessera shut down in May 2023; the frontend is dead but contracts remain functional.

Kyber FeeHandler Kyber Network v1 (Katalyst) distributed ETH trading fees to KNC stakers who voted in governance epochs. Kyber has since migrated to KyberSwap with a different architecture. The old staking UI is dead, but the FeeHandler contract still holds unclaimed epoch rewards with no expiration.

NuCypher WorkLock NuCypher launched a WorkLock distribution in September 2020, where participants deposited ETH to receive NU tokens. ETH was refundable after completing staking work. NuCypher merged with Keep Network to form Threshold Network in 2022, and the staking requirement was removed, so all participants now qualify for a full refund regardless of work completed.

Bancor Old ETH Token Bancor launched June 2017 with a then-record $153M ICO and deployed the first-ever automated market maker contracts on Ethereum, inventing bonding curves and liquidity pool tokens before "DeFi" was coined. On July 9, 2018, attackers stole 25,000 ETH (~$12.5M) via a compromised upgrade wallet. This is the legacy ETH wrapper from Bancor's early architecture.

SwitchDex An EtherDelta-fork DEX by Switch.ag (2019), notable for being active from 2019-2024 with 8,000+ trades, unusually long-lived for an order-book DEX in the AMM era.

Coinchangex An EtherDelta-fork DEX (2018) that shut down around March 2020. Processed a moderate volume of trades during the ICO token trading era.

SwissCryptoExchange A whitelisted EtherDelta-fork DEX (2018). Unusual in that deposits required whitelist approval, but the withdraw function is permissionless. Anyone with a balance can withdraw.

LSCX The DEX component of Lescovex, a Spanish platform for issuing and trading Ethereum financial contracts (October 2018). Part of a broader ecosystem that included tokenized securities and smart contract templates.

Bitcratic v1 The original Bitcratic contract before the team migrated to a newer version. Users who didn't move their funds to the updated contract still have balances here.

MarketPlace An EtherDelta-fork DEX from the 2017-2018 era. One of dozens of exchanges that cloned EtherDelta's open-source smart contract to launch competing trading platforms.

Bitox An EtherDelta-fork DEX that also offered airdrop aggregation services (2018). Combined token trading with a directory of active ERC-20 airdrops.

ED Fork (0xc513) An unverified EtherDelta v2 fork. Source code not published on Etherscan but bytecode matches the standard pattern.

Ethernext An EtherDelta-fork DEX from the 2017-2018 era. One of dozens of exchanges that cloned EtherDelta's open-source smart contract to launch competing trading platforms.

SeedDex v2 An EtherDelta-fork DEX from the 2017-2018 era. One of dozens of exchanges that cloned EtherDelta's open-source smart contract to launch competing trading platforms.

SeedDex v3 An EtherDelta-fork DEX from the 2017-2018 era. One of dozens of exchanges that cloned EtherDelta's open-source smart contract to launch competing trading platforms.

PolarisDEX An EtherDelta-fork DEX from the 2017-2018 era. One of dozens of exchanges that cloned EtherDelta's open-source smart contract to launch competing trading platforms.

Ethmall An EtherDelta-fork DEX from the 2017-2018 era. One of dozens of exchanges that cloned EtherDelta's open-source smart contract to launch competing trading platforms.

ExToke A fee-free DEX for ERC-20 tokens (2018) that planned to add an ICO launchpad feature. Conducted its own token sale but failed to gain traction.

AlgoDEX An EtherDelta-fork DEX from the 2017-2018 era. One of dozens of exchanges that cloned EtherDelta's open-source smart contract to launch competing trading platforms.

nDEx An EtherDelta-fork DEX from the 2017-2018 era. One of dozens of exchanges that cloned EtherDelta's open-source smart contract to launch competing trading platforms.

EDex An EtherDelta-fork DEX from the 2017-2018 era. One of dozens of exchanges that cloned EtherDelta's open-source smart contract to launch competing trading platforms.

TradexOne An EtherDelta-fork DEX from the 2017-2018 era. One of dozens of exchanges that cloned EtherDelta's open-source smart contract to launch competing trading platforms.

Afrodex An EtherDelta-fork DEX from the 2017-2018 era. One of dozens of exchanges that cloned EtherDelta's open-source smart contract to launch competing trading platforms.

ReadyPlayerONE Deployed July 2018, a Fomo3D fork named after the Ernest Cline novel and Spielberg film. Same key-purchase countdown mechanic where the last buyer before the timer expires wins the pot. Note: isHuman modifier, so smart contract wallets cannot withdraw.

Last Winner A Fomo3D-style gambling game deployed in 2018, also known as "Last Winner", one of the largest Fomo3D clones by total ETH volume. Players purchase keys that extend a countdown timer; when the timer runs out, the last buyer wins the pot. Unclaimed dividends and affiliate earnings remain withdrawable. Note: isHuman modifier, so smart contract wallets cannot withdraw.

FoMo3D Lightning One of the earliest Fomo3D clones, deployed July 2018 within weeks of the original. A speed-round variant of the countdown-timer game where rounds resolved faster than standard Fomo3D. Note: isHuman modifier, so smart contract wallets cannot withdraw.

Etheropt Old The first decentralized options exchange on Ethereum (early 2016), from the creator of EtherDelta. Offered vanilla call and put options on ETH/USD using Poloniex and Coindesk data verified by Reality Keys. Entirely autonomous with no owner and no fees. Shut down in late 2016.

GandhiJi was a P3D clone (2018) themed around Indian independence. Direct fork of PoWH3D with identical 10% buy/sell fee mechanics. 8,800+ holders. Fully autonomous, no owner.

Zethr was a P3D-style casino token (2018) where holders "be the house." Users pick dividend rates (2-33%). Includes slots and other casino games. This is the token contract holding user dividends.

Zethr Casino was the main Zethr casino bankroll contract (2018). Holds house funds and player dividends from casino games.

EthPyramid was the original Ethereum dividend/pyramid token (early 2018), predating PoWH3D. Later rebranded to EthPhoenix.

FoMoGame was a Fomo3D clone (2018). Same countdown/key-buying mechanics with player vaults.

PoWH3D A self-aware Ponzi-style token game (February 2018) rewritten after the original PoWH was drained of 200+ ETH via an integer overflow bug. Every buy and sell of P3D tokens incurs a 10% fee distributed to all existing holders. At peak held 16,000 ETH (~$6.4M). Spawned thousands of forks including Fomo3D.

Lido AnchorVault Lido's stETH→Anchor Protocol (Terra) integration, shut down after the May-2022 Terra/LUNA collapse via Lido DAO Proposal 29. bETH (bonded ETH) holders on Ethereum can redeem 1:1 for stETH by calling withdraw() — no approval needed, as the vault holds the bETH burner role. Balances are read live from the bETH token and are stETH-denominated (~1:1 with ETH). bETH locked in the Wormhole bridge and held by exchanges or other contracts is excluded as non-claimable.

P4RTY DAO Vault P4RTY DAO Vault was a 2018 dividend vault from p4rty.io. Users staked P4RTY tokens, and ETH sent to the vault was distributed pro-rata to stakers. The frontend is gone, but accumulated ETH dividends remain withdrawable via withdraw(); staked P4RTY itself is not unstaked by this vault.

POWM Proof of Weak Math, deployed April 2018 during the first wave of P3D clones. Named as a jab at PoWL, an earlier clone with a coding error that broke its dividend math. Featured a 20% fee and briefly held over 4,000 ETH.

POOH Deployed April 2018, POOH branded itself as "the most honest P3D clone" and an "honest proof of cloning." Same 10% buy/sell fee mechanics as PoWH3D, hosted at number2.io.

PoWTF Short for "Proof of World Trade Francs," deployed April 2018. Named after a fictional stablecoin jokingly proposed by Vitalik Buterin. Featured higher fees than standard P3D: 20% on buys and 25% on sells.

Hourglass Clone A An unnamed PoWH3D fork deployed April 2018, using the same Hourglass dividend token contract with no meaningful modifications. One of dozens of near-identical clones launched during the P3D craze.

Hourglass Clone B Another unbranded Hourglass contract deployed April 2018. A direct copy of the PoWH3D source code with identical 10% buy/sell fees distributed to token holders.

LOCKEDiN Deployed April 2018, LOCKEDiN was a PoWH3D fork that emphasized the "lock in your ETH for dividends" angle. Standard Hourglass mechanics where every transaction fee is split among all existing token holders.

StrongHold A PoWH3D clone from April 2018 that branded itself as a safer, more resilient version of the P3D dividend model. Used the same autonomous contract mechanics with no owner and no self-destruct.

Hourglass Clone C Deployed April 2018 at the peak of the PoWH3D clone wave. An unmodified copy of the Hourglass dividend contract where holding tokens earns a share of all future buy and sell fees.

Hourglass Clone D Yet another April 2018 Hourglass fork, part of the rapid proliferation of P3D clones that flooded Ethereum in spring 2018. Identical dividend token mechanics with 10% fees on every transaction.

P4D A PoWH3D clone from 2018. Standard Hourglass dividend mechanics where ETH deposits mint tokens and trading fees generate passive income for holders.

UnKoin A PoWH3D clone from April 2018 with a play on "unknown coin." Standard Hourglass dividend mechanics where ETH deposits mint tokens and all trading activity generates passive income for holders.

AceDapp Deployed October 2019, a late-era PoWH3D clone that launched well after most P3D forks had already lost their user bases. Standard Hourglass dividend mechanics with 10% buy/sell fees.

CryptoMinerToken was a dividend-yielding PoWH3D clone (September 2018) hosted at minertoken.cloud, with customized fee tiers: 10% deposit, 4% withdrawal, 1% transfer, and 33% referral rewards.

BlueChip was a PoWH3D clone (September 2019) implementing the standard 10% fee-sharing dividend mechanism where trading activity generates ETH rewards for token holders.

REV1 Deployed May 2018, REV1 was an early PoWH3D fork from the second month of the P3D clone wars. Straightforward dividend token where 10% of every buy and sell is redistributed to holders.

POTJ Proof of Trevon James, launched April 2018, was a PoWH3D fork with higher fees (20% buys, 25% sells) themed around a crypto YouTube personality involved in the BitConnect case.

LYNIA A gaming and gambling platform deployed August 2018 that combined PoWH3D-style dividend tokens with provably fair on-chain games. Has an isHuman modifier, so smart contract wallets cannot withdraw.

BlackGoldEthereum was a dividend-based PoWH3D clone (July 2020) designed to provide passive income to token holders through a buy/sell/reinvestment mechanism. The project website blackgoldethereum.club is no longer accessible.

ProofOfCraigGrant Deployed April 2018, a meme-themed PoWH3D fork named after Craig Grant, one of BitConnect's most prominent YouTube promoters. Part of a series of personality-themed P3D clones alongside Proof of Trevon James.

SportCrypt was a peer-to-peer decentralized sports betting exchange (January 2018) with zero fees and no KYC requirements. Later rebranded to Degens and received a MakerDAO community grant to accept DAI alongside ETH.

DailyDivs was a PoWH3D clone (October 2018) offering daily dividend distributions to token holders through a 10% buy/sell fee. Has an isHuman modifier, so smart contract wallets cannot withdraw.

ProofOfCommunity A May 2018 PoWH3D fork that rebranded the dividend token concept around community ownership. Same underlying Hourglass mechanics where all transaction fees are split among existing holders.

BitConnect Token Deployed June 2019, a PoWH3D clone that borrowed the BitConnect name a year and a half after the original lending platform collapsed. Standard dividend token mechanics; unrelated to the actual BitConnect project.

Eightherbank A November 2019 PoWH3D fork with a banking theme. Uses the Hourglass dividend model with an isHuman modifier, so smart contract wallets cannot withdraw.

Nexgen Deployed June 2019, a PoWH3D clone that positioned itself as a next-generation dividend token. Identical Hourglass mechanics to P3D with 10% fees on buys and sells.

DiamondDividend A November 2019 PoWH3D fork using diamond-themed branding for the standard Hourglass dividend model. Holders earn ETH from all future transaction fees proportional to their token balance.

E25 Booster Deployed February 2019, a PoWH3D clone with a modified fee structure hinted at by its "25" branding. Has an isHuman modifier, so smart contract wallets cannot withdraw.

BitConnect v2 The second in a series of BitConnect-themed PoWH3D clones, deployed June 2019. Reused the infamous brand name purely for attention; standard P3D dividend token under the hood.

ETHPlatinum Deployed November 2021, one of the last PoWH3D clones ever created on Ethereum mainnet. By this point gas fees made the P3D dividend model largely impractical for small deposits.

DivsNetwork A July 2020 PoWH3D fork that framed itself as a dividend distribution network. Fully autonomous contract with no owner, running the same Hourglass token model as every other P3D clone.

EtherCenter Deployed July 2019, EtherCenter was a PoWH3D fork that added no meaningful features over the original. Standard 10% fee on every transaction, distributed pro rata to all token holders.

RedChip An October 2019 PoWH3D clone that borrowed stock market terminology. "Red chip" refers to mainland China companies listed in Hong Kong. Standard Hourglass dividend mechanics beneath the branding.

CxxMain Deployed November 2019 with a cryptic name that may reference C++ programming. A PoWH3D fork with unmodified Hourglass contract code and the same fee-redistribution mechanics.

FamilyOnlyToken An August 2020 PoWH3D fork with an invitation-only theme suggested by its name. Same Hourglass dividend model where ETH deposits mint tokens and every trade generates passive income for all holders.

SPW Deployed June 2020, SPW was a minimal PoWH3D clone with no discernible branding or website. Pure Hourglass dividend contract mechanics.

ETHDIAMOND A July 2020 PoWH3D clone using diamond-hands imagery. Identical dividend token contract to P3D. Buy and sell fees are pooled and shared among all token holders automatically.

Ethershares Deployed December 2018, Ethershares framed P3D-style token ownership as "shares" in an ETH revenue pool. Standard Hourglass mechanics with no technical differences from the original.

TwelveHourToken An October 2018 PoWH3D fork, possibly named to suggest rapid dividend accumulation. Uses the same Hourglass contract where transaction fees are continuously redistributed to token holders.

Neutrino81 Deployed March 2019 with a physics-inspired name. A PoWH3D fork using the same autonomous dividend token contract with no owner, no admin keys, just the Hourglass buy/sell fee loop.

HourglassX A December 2018 PoWH3D fork that wore the "Hourglass" name openly. The original P3D contract was called Hourglass internally. Standard dividend mechanics with 10% transaction fees.

FairExchange Deployed October 2018, FairExchange pitched the PoWH3D dividend model as a "fair" alternative to centralized exchanges. Under the surface, identical Hourglass contract code.

POMDA A June 2018 PoWH3D fork whose name likely riffs on "Proof of Mass Dividend Accumulation" or similar. Vanilla Hourglass contract: ETH in, tokens out, dividends from all activity.

DecentEther Deployed August 2020 during DeFi Summer, though it had nothing to do with DeFi, just another PoWH3D clone running the old Hourglass dividend model on a chain now dominated by Uniswap and Compound.

BitConnect v3 The third BitConnect-branded PoWH3D fork, deployed October 2019. By this point the BitConnect name was the subject of SEC enforcement actions, but clone deployers kept reusing it.

Furious A July 2020 PoWH3D clone with an aggressive name but stock-standard mechanics. Same autonomous Hourglass contract where buy/sell fees are distributed to all token holders in perpetuity.

EtherDiamond Deployed July 2020, a sibling to ETHDIAMOND with nearly identical branding. Both are straight PoWH3D forks where token holders earn a cut of every future transaction.

Hourglass Clone E An October 2019 unnamed Hourglass fork, one of several unbranded P3D copies deployed with no website or community, just the raw contract on Ethereum.

CryptoSurge Deployed October 2019 with a name evoking price surges. A PoWH3D fork using the proven Hourglass mechanics where buying tokens costs a 10% fee that goes straight to existing holders.

Hourglass Clone F A November 2018 unbranded Hourglass contract. Deployed during the crypto winter bear market when ETH had fallen over 90% from its peak, yet P3D clones were still appearing.

UPower Deployed July 2018, UPower was a PoWH3D fork from the summer of the P3D craze. Standard dividend token. Deposit ETH, receive tokens, earn from every future transaction on the contract.

Hourglass Clone G A May 2018 unbranded Hourglass fork, one of the earliest nameless P3D copies. Deployed during the peak month of clone activity when dozens of identical contracts appeared on Ethereum.

RedChip v2 The second iteration of RedChip, deployed October 2019 alongside its predecessor. Another PoWH3D fork with the same dividend token mechanics repackaged under a stock-market-inspired name.

OmniDex Deployed August 2018, OmniDex distinguished itself with 18% dividends, masternodes, and 0% transfer fees, tweaking the standard P3D formula. Despite the "DEX" name, it was a dividend token, not an exchange.

SPW v2 The second SPW contract, deployed September 2020. A relaunch of the original SPW using the same PoWH3D Hourglass mechanics with no apparent changes.

Bounties Network was a decentralized bounty platform (December 2017) built by ConsenSys for open-source work and freelance tasks on Ethereum. Bounty issuers who never killed or fulfilled their bounties still have ETH locked in the StandardBounties v1 contract.

Age of Dinos was an NFT Dutch auction (2024). Bidders who overpaid above the clearing price have unclaimed ETH refunds available via claimAndRefund().

PersonaBid was an NFT raffle auction (2024). Bidders who were not selected or overbid have unclaimed ETH refunds available via claimAndRefund().

Maker W-ETH The original Wrapped Ether contract predating the canonical WETH9. Solved the fundamental problem that native ETH couldn't be used in ERC-20 smart contracts, enabling early DEXs like OasisDEX and Radar Relay. Deprecated when the community converged on WETH9 in late 2017.

Old WETH An early Wrapped Ether contract deployed in June 2016, one of the first attempts at wrapping native ETH into an ERC-20 token. Users deposited ETH and received WETH tokens 1:1. Predates both Maker W-ETH and the canonical WETH9. Over 3,200 ETH remains wrapped.

Aave v1 Aave v1 launched in January 2020 as the first version of the Aave lending protocol. Users deposited ETH and received aETH interest-bearing tokens that automatically accrued yield. The protocol migrated to v2 in December 2020 and v3 in March 2022, but the original UI dropped v1 support. Users can still redeem aETH tokens for ETH by calling redeem() on the aETH contract.

Augur v1 Augur launched in July 2018 as Ethereum's first decentralized prediction market protocol. Users could create markets on real-world events, trade outcome shares, and earn fees as market creators. The protocol migrated to v2 in August 2020, but 771 ETH remains locked in the original Cash contract backing unfilled orders, unclaimed market creator fees, and unredeemed winning shares.

Ethfinex Trustless Ethfinex Trustless launched in September 2018 as a non-custodial DEX backed by Bitfinex. Users deposited ETH into WrapperLockEth contracts, receiving ETHW tokens for off-chain order matching via the 0x protocol. The platform rebranded to DeversiFi in 2019, then migrated to StarkEx L2 in 2020, and rebranded again to rhino.fi in 2022. The original wrapper contracts are abandoned but fully functional — all time locks expired years ago, so depositors can withdraw directly without any third-party signature.

Ethfinex Trustless v2 Ethfinex Trustless launched in September 2018 as a non-custodial DEX backed by Bitfinex. Users deposited ETH into WrapperLockEth contracts, receiving ETHW tokens for off-chain order matching via the 0x protocol. The platform rebranded to DeversiFi in 2019, then migrated to StarkEx L2 in 2020, and rebranded again to rhino.fi in 2022. The original wrapper contracts are abandoned but fully functional — all time locks expired years ago, so depositors can withdraw directly without any third-party signature.

Avastars Avastars was an NFT project (2020) that allowed users to mint generative avatar NFTs. Users deposited ETH into the minting contract as a prepayment balance, which was drawn down as they minted. The project is defunct since September 2021, but the minting contract still holds unspent deposit balances.

Unknown DEX (0x5995) An anonymous EtherDelta-style order-book DEX deployed in July 2019. Featured deposit/withdraw for ETH and ERC-20 tokens, off-chain order matching, and onchain settlement. The contract is unverified with no known website or team. Activity ceased in March 2020. Standard withdraw function remains fully operational.

Switcheo BrokerV2 Switcheo Network launched in 2019 as a cross-chain DEX supporting Ethereum, NEO, and EOS. The BrokerV2 contract held user ETH deposits for order matching. Switcheo pivoted to Carbon Network (Cosmos L2) and abandoned the Ethereum contract. The owner zeroed the withdrawal delay in April 2023, enabling instant self-service withdrawals via a 2-step announce + withdraw flow.

KeeperDAO / Rook launched October 2020 as an on-chain liquidity underwriter backed by 3AC, Polychain and Pantera. Depositors earned yield from flash-loan fees and MEV arbitrage, receiving kTokens (kETH, kwETH) as LP shares. The project rebranded to Rook in late 2021 and wound down in 2022; the treasury was liquidated in April 2023 after a governance "rage quit". The LiquidityPoolV2 contract is still live and un-paused — current kETH holders receive ~1.08 ETH per kETH and kwETH holders ~1.05 WETH per kwETH, reflecting the final MEV yield accrued before shutdown.

Pop Finance Pop Finance launched in late 2020 as a WETH yield farm with a genesis staking pool. Users deposited WETH to earn POP token rewards. The project went defunct within months — the frontend is offline and the POP token worthless. All deposited WETH remains fully withdrawable with no time locks or token requirements.

Gnosis DutchX The DxMgnPool was a WETH pooling contract for the Gnosis DutchX decentralized auction mechanism, deployed in May 2019. Users deposited WETH which was pooled into DutchX auctions to earn MGN (magnolia) tokens. The DutchX protocol was deprecated and superseded by CoW Protocol. All auction proceeds have been returned to the pool and are withdrawable by original depositors.

Hegic V1 Pool Hegic ETH Pool v1.1 was the liquidity pool backing ETH call and put options on the Hegic protocol. Liquidity providers deposited native ETH and received writeETH tokens representing their pool share. The protocol migrated to newer versions and v1.1 is deprecated. All option locks have been released — writeETH holders can withdraw their proportional share of the pool.

Hegic V1 Call Hegic V1 launched in 2021 as a peer-to-pool options protocol. Liquidity providers deposited WETH into the call options pool and received ERC-721 tranche NFTs representing their share. The protocol migrated to V2/V3 and the V1 pool is deprecated. All lockup periods have expired — tranche owners can withdraw their proportional share of the remaining pool liquidity.

Shrimp Finance Shrimp Finance launched in September 2020 during DeFi Summer as a Synthetix StakingRewards fork. Users staked WETH to earn SHRIMP governance tokens. The project went defunct within weeks — the frontend is offline, the SHRIMP token worthless, and the team vanished. All staked WETH remains fully withdrawable via exit() with no time locks or token requirements.

Bee2 Finance Bee2 Finance launched in September 2020 during DeFi Summer as a Synthetix StakingRewards fork. Users staked WETH to earn BEE governance tokens. The project went defunct within weeks — the frontend is offline and the BEE token worthless. All staked WETH remains fully withdrawable via exit() with no time locks or token requirements.

Kitten Finance Kitten Finance launched in September 2020 during DeFi Summer as a Synthetix StakingRewards fork. Users staked WETH to earn KIF governance tokens. The project went defunct within weeks — the frontend is offline and the KIF token worthless. All staked WETH remains fully withdrawable via exit() with no time locks or token requirements.

Yam Finance v1 Yam Finance v1 launched in August 2020 as one of the first DeFi Summer yield farms. Users staked WETH to earn YAM tokens. The v1 contract had a rebase bug and the project migrated to v2/v3, abandoning this pool. All staked WETH remains fully withdrawable via exit().

Spaghetti Money Spaghetti Money launched in August 2020 during DeFi Summer as a yield farm fork. Users staked WETH to earn PASTA tokens. The project went defunct within days. All staked WETH remains fully withdrawable via exit().

Doki Doki Finance Doki Doki Finance launched in 2020 as a DeFi yield farm. Users staked WETH to earn DOKI tokens. The project is defunct. All staked WETH remains withdrawable via withdraw().

CoFiX Staking CoFiX (Computable Finance) launched in October 2020. Users staked CoFi tokens and earned WETH rewards. The project is defunct. Unclaimed WETH rewards are claimable via getReward().

Pickle Staking v1 Pickle Finance v1 staking let users stake tokens to earn WETH rewards. Pickle migrated to v2 and Arbitrum, abandoning this pool. Unclaimed WETH is claimable via getReward().

Opyn v2 Gamma Opyn v2 Gamma was the first major decentralized options protocol on Ethereum, launched in late 2020. Holders of expired in-the-money WETH-collateralized oTokens can redeem their share of the underlying collateral. The protocol went silent in early 2022 — these are forgotten redemption claims from 2,613 holders across 38 oToken series. Each holder may have multiple oToken positions; the claim batches them into one Controller.operate() call.

Opyn v1 Opyn v1 launched in early 2020 as one of Ethereum's first decentralized options protocols. Vault owners deposited ETH as collateral to write put options. After option expiry, vault owners can call redeemVaultBalance() on each oToken contract to reclaim their ETH collateral. The original frontend no longer supports v1 contracts.

Celer Payment Channels Celer was a state-channel protocol launched in 2019 that let users make off-chain micropayments through a hub-and-spoke network of liquidity nodes. Celer pivoted to cBridge cross-chain bridging in 2021 and took the official CelerPay UI offline; the contracts were never paused. Users who opened channels and never cooperatively settled can still recover their deposits through the unilateral path: call intendWithdraw, wait 10,000 blocks (~1.4 days) for the dispute window, then call confirmWithdraw. The counterparty can veto during the window, but Celer's own OSP node stopped serving channel-veto signals after the cBridge migration.

Mesa / Gnosis Protocol v1 Mesa was the precursor to CowSwap (Gnosis Protocol v1), a batch-auction DEX deployed in 2020. Users deposited tokens to trade and had to explicitly withdraw to retrieve them. The contract has been dormant since early 2022 but the 2-step withdraw path (requestWithdraw → wait one batch → withdraw) is still permissionless.

UMA Yield Dollar UMA's ExpiringMultiParty contracts let users deposit WETH as collateral to mint synthetic tokens (yUSD, uUSDrBTC, uUSDrETH). All contracts expired in 2020-2021 and the UMA frontend no longer supports v1 settlement. Sponsors can reclaim excess collateral and synthetic token holders can redeem their share via settleExpired() on each EMP contract.

Unagii ETH Vault Unagii was a Yearn-style vault protocol (2021) where users deposited ETH and received uETH shares. The protocol deployed ETH into yield strategies but went dormant in late 2022. The vault is immutable and unpaused with 0% withdrawal fee. Users can burn uETH shares to reclaim proportional ETH via withdraw().

Veil Ether ETH wrapper from Veil, a prediction market built on Augur and 0x that shut down in July 2019. Users deposited ETH and received Veil Ether tokens for use on the platform. The tokens can still be unwrapped 1:1 for ETH.

GavCoin An early Ethereum bonding curve token created in 2015. Users deposited ETH and received GavCoin tokens at a price determined by the bonding curve. Token holders can refund their tokens for ETH at their original purchase price.

Vader Protocol Vader Protocol was a DeFi liquidity protocol with its own stablecoin (USDV). After the protocol wound down, unclaimed WETH remains in a merkle distribution contract. Users can claim their share by providing a valid merkle proof. The original claim UI is offline but proofs are preserved.

Yearn v1 yWETH Yearn Finance launched the v1 yWETH vault in August 2020 as one of the first wrapped-token yield vaults. Users deposited WETH and received yWETH shares representing proportional ownership of the vault. The yearn.fi frontend dropped v1 vault support, leaving share holders without an interface. The vault is unpaused and immutable, and all WETH sits directly in the vault (no active strategy), so yWETH holders can still redeem their shares for the underlying WETH at the current pricePerFullShare.

X2Y2 Fee Sharing X2Y2 launched in February 2022 as an NFT marketplace competing with OpenSea. Stakers locked X2Y2 tokens into the FeeSharingSystem to earn a share of marketplace WETH fees. The x2y2.io frontend went offline and the project is dormant. The staking contract remains unpaused and immutable — stakers can claim accrued WETH rewards at any time via harvest(), or unstake their tokens and claim simultaneously via withdraw(shares, true).

X2Y2 Presale Alongside the February 2022 X2Y2 launch, a signer-gated presale sold 1,000 staking shares at 1.5 ETH each and paid a proportional share of marketplace WETH fees to participants over a one-year staking window. Staking ended in February 2023 and the x2y2.io frontend went offline. The contract is unpaused and immutable — presale participants with remaining X2Y2 tokens can call harvest() to claim pending WETH rewards at any time. Depositors who already withdrew their X2Y2 tokens forfeited future harvests by design.

Metadrop: Anata In April 2022, Metadrop ran a sealed-bid auction for the Anata NFT collection (1,920 items). Bidders above the clearing price won NFTs; the difference between their bid and the clearing price is refundable via a merkle-gated claim. 120 bidders have never claimed their refund (197.33 ETH). The on-chain root is frozen and matching proofs were reconstructed from archived Metadrop frontend JS.

Metadrop: Webaverse In August 2022, Metadrop ran a sealed-bid auction for the Webaverse metaverse NFT collection (7,870 items). Bidders above the clearing price won NFTs; the difference between their bid and the clearing price is refundable via a merkle-gated claim. Webaverse went dormant late 2023. 90 bidders have never claimed their refund (134.15 ETH). The on-chain root is frozen and matching proofs were reconstructed from archived Metadrop frontend JS.

Tokemak v1 tWETH Tokemak launched its v1 reactor system in August 2021 — the ETH pool (EthPool) accepted WETH and minted tWETH shares 1:1 with WETH. Tokemak rebranded to Auto Finance in 2024 and the v1 reactor UI was retired. The contract is unpaused and tWETH holders can still exit via a 2-step flow: requestWithdrawal queues the amount at the current manager cycle, and withdraw pays out the WETH after the manager rolls cycles (~weekly). Holders with a matured pending request can call step 2 directly.

Euler Redemptions After the March 2023 Euler exploit, recovered funds were distributed via a one-shot merkle-drop contract. Each depositor index pays out a basket of WETH, DAI, USDC, COMP, and other tokens proportional to pre-exploit holdings. The euler-redemption-scripts repository was archived June 2024 with 1,638 indices still unclaimed. The contract is unpaused and the merkle root is final — anyone who never returned to claim can still call claimAndAgreeToTerms with their original index and proof. Each claim sends the entire token basket in a single tx.

Gnosis Auction Gnosis Auction (EasyAuction) is a batch auction platform launched by Gnosis in 2021 for fair token launches. Bidders submitted WETH orders; orders below the clearing price are refunded. The gnosis-auction.eth.limo frontend is dead but the contract is immutable with no deadline. Unfilled and partially-filled orders can still be claimed via claimFromParticipantOrder(auctionId, orders[]) — one call per auction.

Nomad Bridge Recovery After the August 2022 Nomad bridge exploit, a fraction of the drained funds were returned to a recovery Accountant contract. Affected depositors received one ERC-721 NFT per token they held pre-hack (WETH, USDC, USDT, DAI, FRAX, WBTC, CQT, FXS). Each NFT can be redeemed independently via recover(tokenId) for its pro-rata share of the current pool. Two requirements: the caller must own the NFT AND be on the contract's allowList (KYC-gated by the Nomad team). The Nomad dashboard is discontinued but the contract is permissionless for allowlisted holders. Roughly 95% of the claimable WETH is held by allowlisted addresses that have never called recover.

PresalePool 2018 A 2018 ICO presale pooling contract built on the Cintix-style PresalePool template, used to aggregate ETH from many small contributors so the group could meet a presale's high minimum allocation. The underlying presale was cancelled and the project's multisig refunded the raised ETH back to the pool, which was then placed into Refund state. Most contributors withdrew during the original distribution window; a handful never returned to claim their share.

MCDEX ETH-PERP MCDEX's early ETH-PERP market entered settled mode after the original trading UI disappeared. Traders with positive settlement margin can still call settle() directly to receive their remaining ETH collateral.

Quantfury QDT Quantfury's QDT contract keeps an ETH payout pool backing outstanding QDT tokens. Holders can still redeem remaining QDT for ETH through sellTokens(uint256).

Monolith TKN Holder The Monolith TKN token can still burn TKN against the legacy Token Holder contract to claim its proportional ETH backing. The old wallet and project frontend no longer surface this path for dormant holders.

EKS EKS contract, a PoWH-style dividend token. Holders with remaining tokens or dividends can still exit through the public exit() path, which sells their tokens and withdraws accrued ETH.

TweetMarket TweetMarket accepted ETH-backed bids on tweet IDs in 2020. The site is gone, but current high bidders can still recover locked bids after the lockup period by calling cancel(tweetID) for each active bid.

Treasure Treasure is a PoWH-style token with separate dividend and sale-withdraw accounting. Holders can claim dividends, sell tokens, and then withdraw ETH credited by the sale path through the legacy contract.

Celer EthPool Celer's early EthPool wrapper accepted native ETH and tracked balances internally. The old CelerPay interface is retired, but holders can still call withdraw(uint256) to unwrap their remaining ETH balance.

ETH Staking Rewards This legacy staking contract accrued native ETH rewards for token stakers. Stakers with remaining accounting balances can call receiveReward(address(0)) to collect pending ETH without unstaking first.

EpikStaking EpikStaking is a legacy EPIK Prime staking rewards contract. The contract is live and unpaused; stakers with accrued native ETH rewards can claim them directly.

Meme Limited Collections Meme Limited Collections split marketplace and pool fees into per-recipient pending withdrawal balances. Artists and controllers with old accrued fees can still call withdrawFee() to receive their ETH.

Foundation FETH Foundation was an NFT marketplace launched in 2021 where bidders deposited ETH into FETH (the marketplace's escrow wrapper) before placing offers. Foundation officially shut the platform offline on April 27, 2026 with no recovery UI for idle FETH balances. The contracts remain live and unpaused; every lockup has now expired, so a single withdrawAvailableBalance() call returns the holder's entire balance as ETH.

FEG Wrapped ETH FEG ecosystem ETH wrapper from 2020 — a reflection-style token where deposits and withdrawals each take a 1% fee, with most fees permanently locked in the contract by design. The FEG team migrated focus to BSC and never operated an Ethereum-side UI for fETH redemption (Defillama lists Fegex Ethereum TVL = 0). Holders call withdraw(amount) to receive 99% of their fETH balance as ETH. Note: holders that are smart contracts without payable receive() will revert because withdraw() uses transfer() (2300 gas).

Futurists Auction Splitter Foundation's "Futurists" 2021 NFT auction proceeds went into an OpenZeppelin PaymentSplitter with 4 hardcoded shareholders (97/1/1/1 shares). Each shareholder can call release(account) to receive their pro-rata cut; the function is permissionless so anyone can trigger payment to a registered shareholder.

WETH10 Andre Cronje's 2020 WETH10 wrapper — proposed successor to canonical WETH9. Never reached significant adoption. Holders call withdraw(uint256) to burn WETH10 and receive ETH 1:1.

MicroETH MicroETH (μETH) is a 2018 ETH wrapper at the 1:1e-6 ratio. Holders call withdraw(uint256 ueth) to burn μETH and receive ETH at the fixed ratio. Note: contract holders without payable receive() will revert because withdraw uses transfer (2300 gas).

Confinale Token Confinale 2018-era ETH-pegged wrapper. Holders call withdraw(uint256 _AmountConf) to burn tokens and receive a proportional ETH share (balanceOf × contract.balance / totalSupply).

Opyn Crab Strategy V2 Opyn's Squeeth Crab Strategy V2 was a delta-neutral yield product. The strategy entered a shutdown state; each crab token is now redeemable for a proportional share of contract ETH via withdrawShutdown(uint256 _crabAmount). Single-step, permissionless.

Collective Canvas Collaborative on-chain generative art project from 2021. Each minted layer earns a share of all subsequent mint fees. NFT owner calls withdraw(tokenId, amount) to claim their accumulated ETH share for each owned tokenId.

Keep Network Bonding Keep Network's KeepBonding contract held operator-staked ETH as collateral for tBTC v1 signing groups. Operators withdraw via withdraw(amount, operator); ETH lands at the operator's pre-set beneficiary, not the caller. Sign with the operator key.

OpenGSN RelayHub v1 OpenZeppelin's original meta-transaction relay hub (2019). Holds dApp deposits and accumulated relay-operator fees. Withdraw via withdraw(amount, dest); msg.sender must equal the balance holder.

Tribe Redeemer Post-shutdown redemption for Tribe DAO. TRIBE token holders can redeem for a proportional share of a 4-token basket (stETH, LQTY, FOX, DAI). Two-step: approve TRIBE → call redeem(to, amount). Only DAI counts on the v2 hero counter.

Gro UST Compensation Gro Protocol compensated addresses hit by the May-2022 UST/Terra depeg with PWRD, its USD stablecoin, vested over two years via a merkle claim contract. Vesting finished 31 May 2024, so every eligible address can now claim its full remaining allocation in a single tx — initialClaim(proof, amount) for first-time claimers, claim() for those who started but stopped. PWRD is redeemable ~1:1 to USDC via Gro's withdraw handler; only USDC counts on the v2 hero counter.