Contracts and protocol

Identify Feel.cash launches by chain, contract, onchain launch proof, and public API records. Review supported networks and protocol infrastructure.

Feel.cash markets are designed to be easy to recognize and straightforward to index. The contract address and chain are always the canonical identity of a coin.

Supported chains

Item	Base	Robinhood Chain	Arc	Solana
Chain ID	8453	4663	5042	None; the API reports 1399811149
Default market pair	WETH; USDC is selectable	WETH or the pair recorded for the launch	USDC; EURC and cirBTC are selectable	SOL; USDC and xStocks are selectable
Cash settlement	The user's Cash balance	The user's Cash balance	The user's Cash balance; EURC and cirBTC pairs can pay in the pair asset	The user's Cash balance
Explorer	BaseScan	Blockscout	Arc Explorer	Solscan

The sections below describe Base, Robinhood Chain, and Arc. Solana launches use different infrastructure, described in Solana launches.

Base USDC:

0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Cash, launch payments, Creator Fees, and Referral Fees use this token. A market can trade on another supported chain while payouts still arrive in the user's Cash balance.

Onchain launch proof

Feel.cash launches through Doppler's Airlock contracts. The Airlock and integrator are not two separate proofs: they are two parts of the same creation transaction.

Part	What it proves
Doppler Airlock	The transaction used the expected deployment system on that chain
Feel.cash integrator	The Airlock.create() call recorded Feel.cash as the launch integrator
Airlock Create event	The transaction created the token address being checked

The production integrator recorded in current Feel.cash creation calls is:

0x3879B1Ee8389FfeFb7afd51b1bafb9fAF23d6699

Airlock is chain-specific. The integrator is currently the same across supported EVM chains:

Network	Chain ID	Doppler Airlock	Feel.cash integrator
Base	8453	0x660eAaEdEBc968f8f3694354FA8EC0b4c5Ba8D12	0x3879B1Ee8389FfeFb7afd51b1bafb9fAF23d6699
Robinhood Chain	4663	0xeb7c034704ef8dcd2d32324c1545f62fb4ad0862	0x3879B1Ee8389FfeFb7afd51b1bafb9fAF23d6699
Arc	5042	0x14870a3282bd707b252e3c0f356a68b4c8f6d2ff	0x3879B1Ee8389FfeFb7afd51b1bafb9fAF23d6699

To reproduce the onchain proof for a token:

1. a successful call to the Airlock listed for that chain;

2. the Feel.cash integrator in the decoded Airlock.create() calldata; and

3. the emitted Create event whose asset is the token being indexed.

These checks identify a launch with Feel.cash onchain attribution. They do not show that Feel.cash owns the token or holds user funds, and they are not a contract audit or creator endorsement.

The Airlock is shared infrastructure, and the integrator is an attribution value rather than a permissioned signature. Test or pre-rebrand records can carry the same onchain combination. Before presenting a launch as currently official, reconcile the token with the Feel.cash API and require officialFeelLaunch: true.

The 0x…fee1 signature

Every EVM token contract address begins with 0x. New official Feel.cash launch addresses are mined so the final four characters are fee1:

0x....................................fee1

The dots represent the rest of the 40 hexadecimal address characters; they are not part of the real address. Feel.cash verifies the complete address before broadcasting the launch transaction.

The 0x…fee1 pattern makes official launches easier to spot, but it is not proof on its own. Anyone can attempt to deploy an unrelated address with the same ending.

Always confirm the chain and complete contract address, complete onchain launch proof, pool, and Feel.cash API record.

Current launch configuration

Property	Current default
Token supply	1,000,000,000
Token supply placed in the pool	100%
Creator allocation at launch	0%
Creator LP withdrawal	Not available
Liquidity migration	Disabled; the launch pool is permanent
Starting FDV target	Approximately $10,000
Uniswap v4 LP fee	0%
Trading fee after opening protection	1.5% at the standard creator fee; up to 4% with a custom creator fee
Opening protection	50%, decaying linearly to 1.5% over 15 seconds
Governance module	No-op
Migration module	No-op

Markets use Uniswap v4 liquidity. The entire token supply enters the launch pool, governance and migration are disabled, and the creator cannot withdraw the LP position. The current deployment path uses Doppler/Airlock infrastructure to create the market and record the integrator; indexers do not need to depend on that provider name as the identity of a Feel.cash coin.

What is immutable

The token contract, pool identity, curve, fee configuration, recipients, supply, salt, and integrator are fixed for each launch. Feel.cash cannot retroactively change those rules or replace a coin's contract.

Historical coins keep the configuration they launched with. Read each coin's record rather than applying today's defaults to every supported coin.

Solana launches

Solana coins launch on Raydium LaunchLab under one Feel.cash platform, then graduate automatically to a Raydium liquidity pool.

Item	Value
Launch program (Raydium LaunchLab)	LanMV9sAd7wArD4vJFi2qDdfnVhFxYSUg6eADduJ3uj
Feel.cash platform	Fo1dp1JYQQWgYgAdiZWfmJpA7KRreCdCEyEEVcE1Q2TN, administered by a multisig
Pool program after graduation (Raydium CPMM)	CPMMoo8L3F4NbTegBCKVNunggL7H1ZpdTHKxQB5qKP1C
Token program	Token-2022, TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb

Onchain launch proof on Solana

1. The mint is owned by Token-2022 and ends in fee1, in any letter case (for example …Fee1).

2. The launch pool is the account derived under the launch program from the seed pool, the coin's mint, and the pair's mint.

3. That pool records the Feel.cash platform above as its platform.

As on the EVM chains, this identifies a provenance candidate. Another launcher can name the same platform, and anyone can mine a fee1 ending. Only a matching API record with officialFeelLaunch: true identifies an official Feel.cash launch.

Token configuration

Property	Value
Standard	Token-2022
Supply and decimals	1,000,000,000 with 6 decimals
Mint authority	None; no more coins can be minted
Freeze authority	None; balances cannot be frozen
Transfer fee	None
Extensions	Metadata pointer and token metadata only
Metadata	Name, symbol, and URI stored in the mint itself; the URI is served from ipfs.feel.cash
Creator or team allocation	0%; no vesting or locked supply
Sold on the bonding curve	793,100,000 coins; the rest pairs with the funds raised at graduation
Liquidity after graduation	Locked
Trading fee	1.5% in both phases; split

Why some explorers show mutable metadata

A Solana coin's metadata has an update authority, so some explorers label it “mutable”. That authority is WLHv2UAZm6z4KyaaELi5pjdbJh6RESMva1Rnn8pJVVh, an address controlled by the Raydium launch program. It is not a wallet: neither the creator nor Feel.cash holds a key for it, and neither can change a coin's name, symbol, or image link.

Raydium's published program interface has no instruction that edits a coin's metadata. Raydium can upgrade its own programs, so this depends on Raydium rather than on a guarantee Feel.cash can make.

What is fixed on Solana

The mint address, supply, decimals, pairing, curve, graduation rule, and the absence of mint and freeze authorities are fixed at launch. Feel.cash cannot change them or replace a coin.

Two things sit outside the coin itself: Raydium controls and can upgrade its programs, and an xStock used as a pairing remains under its issuer's controls.

Recommended verification sequence

1. Resolve the coin by chain and contract through the Public API v1.

2. Confirm officialFeelLaunch: true.

3. Confirm the complete contract address and chain ID.

4. Confirm the creation transaction called the chain-specific Doppler Airlock.

5. Decode Airlock.create() and match the production integrator.

6. Match the token to the asset emitted in the Airlock Create event.

7. Inspect the pool and read the coin's own fee and market configuration.

For a Solana coin, replace steps 4 to 6 with the Solana launch proof.