hood// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;
import {Ownable2Step, Ownable} from "openzeppelin-contracts/contracts/access/Ownable2Step.sol";
import {IERC20} from "openzeppelin-contracts/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol";
import {ISlopFactory, ISlopPair, IWETH} from "./interfaces.sol";
/// @title GraduationMigrator — seeds a DEX pool at graduation and holds the LP
/// as PROTOCOL-OWNED LIQUIDITY (POL).
/// @notice When a token graduates on the launchpad, its contract-locked reserve
/// tokens + the paired ETH from the curve are deposited here into a new
/// SlopPair. The resulting LP tokens are minted TO THIS CONTRACT and
/// **there is deliberately no function that can transfer, burn, or
/// remove them** — the liquidity is permanent. The protocol earns swap
/// fees forever as the LP position's claim on the pool's reserves grows
/// with volume; it never sells into holders (see docs/monetization.md,
/// docs/roadmap.md — the "POL, not a sellable allocation" model).
///
/// This is the intentional design point vs. taking a raw token
/// allocation: POL cannot be dumped, deepens the market, and aligns the
/// protocol with holders. Audit note: the absence of any LP-exit path is
/// a feature — verify no code path moves `pair` LP out of this contract.
contract GraduationMigrator is Ownable2Step {
using SafeERC20 for IERC20;
ISlopFactory public immutable factory;
address public immutable WETH;
/// @notice Launchpads permitted to trigger migration (set by owner).
mapping(address => bool) public isLaunchpad;
struct Position {
address pair;
uint256 liquidity; // LP minted to this contract (permanent)
uint256 ethSeeded;
uint256 tokensSeeded;
uint64 migratedAt;
address creator; // attributed ON-CHAIN at graduation (from the launchpad)
}
mapping(address token => Position) public positions;
address[] public allMigrated;
event LaunchpadSet(address indexed launchpad, bool allowed);
event Migrated(
address indexed token,
address indexed pair,
uint256 tokenAmount,
uint256 ethAmount,
uint256 liquidity
);
error NotLaunchpad();
error AlreadyMigrated();
error NothingToMigrate();
error PairAlreadyExists();
error NoLiquidityMinted();
constructor(address owner_, address factory_, address weth_) Ownable(owner_) {
factory = ISlopFactory(factory_);
WETH = weth_;
}
function setLaunchpad(address launchpad, bool allowed) external onlyOwner {
isLaunchpad[launchpad] = allowed;
emit LaunchpadSet(launchpad, allowed);
}
/// @notice Called by an authorized launchpad at graduation. The launchpad must
/// have APPROVED this migrator for `tokenAmount` of `token` (pulled via
/// transferFrom below) and sends the paired ETH as msg.value. Creates +
/// seeds a FRESH TOKEN/WETH pool and locks the LP here as POL.
/// @param creator the token's creator, attributed on-chain here at graduation
/// (immutable once recorded) so the FeeSplitter can pay their post-grad
/// share with no owner key ever setting who earns.
/// @dev "Seed at final curve price" (founder decision 2026-07-11): we seed the
/// pool organically with the 200M reserve + the FULL raised ETH — no
/// chosen/arbitrary price, no ETH diverted out of the pool. The pool
/// therefore opens NEAR the curve's final spot price; the small residual
/// (the curve prices against virtual reserves, the pool against real
/// reserves) opens the pool a hair ABOVE the last curve price, so it
/// favors exiting holders, never the protocol. All raised ETH becomes
/// permanent POL depth. Audit note: verify no path removes that ETH.
function migrate(address token, uint256 tokenAmount, address creator)
external
payable
returns (address pair, uint256 liquidity)
{
if (!isLaunchpad[msg.sender]) revert NotLaunchpad();
if (positions[token].pair != address(0)) revert AlreadyMigrated();
if (tokenAmount == 0 || msg.value == 0) revert NothingToMigrate();
// audit C-1: the graduation pair MUST be freshly created HERE. Factory pair
// creation is gated to this migrator, so no attacker-controlled pre-seeded /
// skewed pool can exist for `token`; this guard is belt-and-suspenders —
// we NEVER mint into a pre-existing pool (which would let its LPs siphon the
// seeded liquidity via v2's excess-donation on mint).
if (factory.getPair(token, WETH) != address(0)) revert PairAlreadyExists();
pair = factory.createPair(token, WETH);
require(ISlopPair(pair).totalSupply() == 0, "GraduationMigrator: pair not fresh");
// Pull the reserve tokens from the launchpad. Using a pull (transferFrom)
// rather than assuming a prior push means a reverting migration rolls back
// ATOMICALLY — the launchpad keeps the tokens and can retry (finalizeMigration).
IERC20(token).safeTransferFrom(msg.sender, address(this), tokenAmount);
// Seed the fresh pool: both sides in, LP minted to THIS contract (POL). On a
// fresh pool, mint sets the price from exactly these amounts (no skew), so
// the pool opens at the curve's final price and the migrator receives the
// full first-mint LP.
IERC20(token).safeTransfer(pair, tokenAmount);
IWETH(WETH).deposit{value: msg.value}();
IWETH(WETH).transfer(pair, msg.value);
liquidity = ISlopPair(pair).mint(address(this));
if (liquidity == 0) revert NoLiquidityMinted();
positions[token] = Position({
pair: pair,
liquidity: liquidity,
ethSeeded: msg.value,
tokensSeeded: tokenAmount,
migratedAt: uint64(block.timestamp),
creator: creator
});
allMigrated.push(token);
emit Migrated(token, pair, tokenAmount, msg.value, liquidity);
}
// ---- views (POL is transparent + on-chain) ----
function migratedCount() external view returns (uint256) {
return allMigrated.length;
}
function pairOf(address token) external view returns (address) {
return positions[token].pair;
}
/// @notice The creator attributed on-chain at graduation. Read by the
/// FeeSplitter to route the post-graduation creator fee share. Zero if
/// the token has not graduated through this migrator.
function creatorOf(address token) external view returns (address) {
return positions[token].creator;
}
/// @notice Current redeemable value of the protocol's permanent LP position,
/// for transparency/reporting. This value grows as swap fees accrue;
/// the protocol never actually redeems it.
function polValue(address token) external view returns (uint256 tokenAmt, uint256 ethAmt) {
Position memory p = positions[token];
if (p.pair == address(0)) return (0, 0);
ISlopPair pair = ISlopPair(p.pair);
uint256 supply = pair.totalSupply();
if (supply == 0) return (0, 0);
(uint112 r0, uint112 r1,) = pair.getReserves();
(uint256 rToken, uint256 rEth) =
pair.token0() == token ? (uint256(r0), uint256(r1)) : (uint256(r1), uint256(r0));
tokenAmt = p.liquidity * rToken / supply;
ethAmt = p.liquidity * rEth / supply;
}
}[
{
"type": "constructor",
"inputs": [
{
"name": "owner_",
"type": "address",
"internalType": "address"
},
{
"name": "factory_",
"type": "address",
"internalType": "address"
},
{
"name": "weth_",
"type": "address",
"internalType": "address"
}
],
"stateMutability": "nonpayable"
},
{
"name": "AlreadyMigrated",
"type": "error",
"inputs": []
},
{
"name": "NoLiquidityMinted",
"type": "error",
"inputs": []
},
{
"name": "NotLaunchpad",
"type": "error",
"inputs": []
},
{
"name": "NothingToMigrate",
"type": "error",
"inputs": []
},
{
"name": "OwnableInvalidOwner",
"type": "error",
"inputs": [
{
"name": "owner",
"type": "address",
"internalType": "address"
}
]
},
{
"name": "OwnableUnauthorizedAccount",
"type": "error",
"inputs": [
{
"name": "account",
"type": "address",
"internalType": "address"
}
]
},
{
"name": "PairAlreadyExists",
"type": "error",
"inputs": []
},
{
"name": "SafeERC20FailedOperation",
"type": "error",
"inputs": [
{
"name": "token",
"type": "address",
"internalType": "address"
}
]
},
{
"name": "LaunchpadSet",
"type": "event",
"inputs": [
{
"name": "launchpad",
"type": "address",
"indexed": true,
"internalType": "address"
},
{
"name": "allowed",
"type": "bool",
"indexed": false,
"internalType": "bool"
}
],
"anonymous": false
},
{
"name": "Migrated",
"type": "event",
"inputs": [
{
"name": "token",
"type": "address",
"indexed": true,
"internalType": "address"
},
{
"name": "pair",
"type": "address",
"indexed": true,
"internalType": "address"
},
{
"name": "tokenAmount",
"type": "uint256",
"indexed": false,
"internalType": "uint256"
},
{
"name": "ethAmount",
"type": "uint256",
"indexed": false,
"internalType": "uint256"
},
{
"name": "liquidity",
"type": "uint256",
"indexed": false,
"internalType": "uint256"
}
],
"anonymous": false
},
{
"name": "OwnershipTransferStarted",
"type": "event",
"inputs": [
{
"name": "previousOwner",
"type": "address",
"indexed": true,
"internalType": "address"
},
{
"name": "newOwner",
"type": "address",
"indexed": true,
"internalType": "address"
}
],
"anonymous": false
},
{
"name": "OwnershipTransferred",
"type": "event",
"inputs": [
{
"name": "previousOwner",
"type": "address",
"indexed": true,
"internalType": "address"
},
{
"name": "newOwner",
"type": "address",
"indexed": true,
"internalType": "address"
}
],
"anonymous": false
},
{
"name": "WETH",
"type": "function",
"inputs": [],
"outputs": [
{
"name": "",
"type": "address",
"internalType": "address"
}
],
"stateMutability": "view"
},
{
"name": "acceptOwnership",
"type": "function",
"inputs": [],
"outputs": [],
"stateMutability": "nonpayable"
},
{
"name": "allMigrated",
"type": "function",
"inputs": [
{
"name": "",
"type": "uint256",
"internalType": "uint256"
}
],
"outputs": [
{
"name": "",
"type": "address",
"internalType": "address"
}
],
"stateMutability": "view"
},
{
"name": "creatorOf",
"type": "function",
"inputs": [
{
"name": "token",
"type": "address",
"internalType": "address"
}
],
"outputs": [
{
"name": "",
"type": "address",
"internalType": "address"
}
],
"stateMutability": "view"
},
{
"name": "factory",
"type": "function",
"inputs": [],
"outputs": [
{
"name": "",
"type": "address",
"internalType": "contract ISlopFactory"
}
],
"stateMutability": "view"
},
{
"name": "isLaunchpad",
"type": "function",
"inputs": [
{
"name": "",
"type": "address",
"internalType": "address"
}
],
"outputs": [
{
"name": "",
"type": "bool",
"internalType": "bool"
}
],
"stateMutability": "view"
},
{
"name": "migrate",
"type": "function",
"inputs": [
{
"name": "token",
"type": "address",
"internalType": "address"
},
{
"name": "tokenAmount",
"type": "uint256",
"internalType": "uint256"
},
{
"name": "creator",
"type": "address",
"internalType": "address"
}
],
"outputs": [
{
"name": "pair",
"type": "address",
"internalType": "address"
},
{
"name": "liquidity",
"type": "uint256",
"internalType": "uint256"
}
],
"stateMutability": "payable"
},
{
"name": "migratedCount",
"type": "function",
"inputs": [],
"outputs": [
{
"name": "",
"type": "uint256",
"internalType": "uint256"
}
],
"stateMutability": "view"
},
{
"name": "owner",
"type": "function",
"inputs": [],
"outputs": [
{
"name": "",
"type": "address",
"internalType": "address"
}
],
"stateMutability": "view"
},
{
"name": "pairOf",
"type": "function",
"inputs": [
{
"name": "token",
"type": "address",
"internalType": "address"
}
],
"outputs": [
{
"name": "",
"type": "address",
"internalType": "address"
}
],
"stateMutability": "view"
},
{
"name": "pendingOwner",
"type": "function",
"inputs": [],
"outputs": [
{
"name": "",
"type": "address",
"internalType": "address"
}
],
"stateMutability": "view"
},
{
"name": "polValue",
"type": "function",
"inputs": [
{
"name": "token",
"type": "address",
"internalType": "address"
}
],
"outputs": [
{
"name": "tokenAmt",
"type": "uint256",
"internalType": "uint256"
},
{
"name": "ethAmt",
"type": "uint256",
"internalType": "uint256"
}
],
"stateMutability": "view"
},
{
"name": "positions",
"type": "function",
"inputs": [
{
"name": "token",
"type": "address",
"internalType": "address"
}
],
"outputs": [
{
"name": "pair",
"type": "address",
"internalType": "address"
},
{
"name": "liquidity",
"type": "uint256",
"internalType": "uint256"
},
{
"name": "ethSeeded",
"type": "uint256",
"internalType": "uint256"
},
{
"name": "tokensSeeded",
"type": "uint256",
"internalType": "uint256"
},
{
"name": "migratedAt",
"type": "uint64",
"internalType": "uint64"
},
{
"name": "creator",
"type": "address",
"internalType": "address"
}
],
"stateMutability": "view"
},
{
"name": "renounceOwnership",
"type": "function",
"inputs": [],
"outputs": [],
"stateMutability": "nonpayable"
},
{
"name": "setLaunchpad",
"type": "function",
"inputs": [
{
"name": "launchpad",
"type": "address",
"internalType": "address"
},
{
"name": "allowed",
"type": "bool",
"internalType": "bool"
}
],
"outputs": [],
"stateMutability": "nonpayable"
},
{
"name": "transferOwnership",
"type": "function",
"inputs": [
{
"name": "newOwner",
"type": "address",
"internalType": "address"
}
],
"outputs": [],
"stateMutability": "nonpayable"
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| Token | Symbol | Balance | Price | Value |
|---|---|---|---|---|
| no token holdings | ||||
| Block | Age | Parent Transaction Hash | Type | Method | From | To | Value | |
|---|---|---|---|---|---|---|---|---|
| no internal transactions found for this address yet (traced blocks + on-demand) | ||||||||
| Type | Age | Block | Details |
|---|---|---|---|
| no cross-chain L1↔L2 transactions for this address | |||
| Transaction Hash | Method | Block | Age | From | To | Amount | Token | ||
|---|---|---|---|---|---|---|---|---|---|
| no token transfers for this address yet | |||||||||
| Txn Hash | Age | Event | Topics / Data |
|---|---|---|---|
| 0x32666a…d33314 | 34 days agoTue, 14 Jul 2026 19:15:30 UTC | 0x8be007…57e0 | [0] 0x000000000000…91b068a4 [1] 0x000000000000…876cfc17 |
| 0x7f9639…a65973 | 34 days agoTue, 14 Jul 2026 19:06:55 UTC | 0x38d16b…2700 | [0] 0x000000000000…91b068a4 [1] 0x000000000000…876cfc17 |
| 0xfc80b3…f23527 | 34 days agoTue, 14 Jul 2026 19:06:50 UTC | 0x6bce71…850a | [0] 0x000000000000…bec83ca5 data: 0x000000000000000000…00000001 |
| 0x5c4777…373989 | 34 days agoTue, 14 Jul 2026 19:06:44 UTC | 0x8be007…57e0 | [0] 0x000000000000…00000000 [1] 0x000000000000…91b068a4 |
| Transaction Hash | Method | Block | Age | From | To | Type | Item | ||
|---|---|---|---|---|---|---|---|---|---|
| no NFT transfers for this address yet | |||||||||
| Transaction Hash | Method ? | Block | Age | From | To | Amount | Txn Fee ? | ||
|---|---|---|---|---|---|---|---|---|---|
| 0x32666a…d33314 | acceptOwnership | 9,773,574 | 34 days agoTue, 14 Jul 2026 19:15:30 UTC | 0x988d…fc17 | IN | GraduationMigrator | $0.000 ETH | 0.00000150 | |
| 0x7f9639…a65973 | transferOwnership | 9,768,430 | 34 days agoTue, 14 Jul 2026 19:06:55 UTC | 0x132d…68a4 | IN | GraduationMigrator | $0.000 ETH | 0.00000252 | |
| 0xfc80b3…f23527 | setLaunchpad | 9,768,386 | 34 days agoTue, 14 Jul 2026 19:06:50 UTC | 0x132d…68a4 | IN | GraduationMigrator | $0.000 ETH | 0.00000253 |