EngagementDrivenConverter (AMM)

The EngagementDrivenConverter is the current AMM that pairs the rewards token (YCR) to the value token (YCE). The rate is driven by network engagement (an internal X parameter that adjusts with activity), not a pure constant-product curve. Every swap still pays a 2% fee that is permanently burned, keeping YCR structurally deflationary.

This contract replaces the legacy YCEYCRPool (0x288b3e…51b1). The function names are the same; the read surface differs — see below.


Address	`0xb7646654d1fd946e8a8bc32b5786a571be5925f2`
Pair	YCR ↔ YCE
Type	Engagement-driven (`X = currentXWad()`)
Burn on swap	2% of input
Initial seed	50M YCR / 2M YCE
Rate floor / ceiling	25 YCR/YCE / 1000 YCR/YCE

Read methods

`reserves() → (uint256 r_ycr, uint256 r_yce)`

Returns both reserves at once. Both values are in wei (1e18 base).

`currentXWad() → uint256`

Current engagement-driven price parameter (1e18-scaled). Lower X means cheaper YCE in YCR terms; rises with engagement. Bounded by ammMinRate=25 and ammMaxRate=1000.

`quoteYCRForYCE(uint256 ycrIn) → uint256`

Returns how much YCE the user would receive for ycrIn YCR, after the 2% burn. Pure view.

`quoteYCEForYCR(uint256 yceIn) → uint256`

Returns how much YCR the user would receive for yceIn YCE, after the 2% burn.

Write methods

`swapYCRForYCE(uint256 ycrIn, uint256 minYceOut) → uint256`

Swap ycrIn YCR for at least minYceOut YCE. Pre-conditions: caller must have called YCR.approve(converter, ycrIn) first. Reverts:

InsufficientOutput() — quote below minYceOut
TransferFailed() — approval missing or balance too low

`swapYCEForYCR(uint256 yceIn, uint256 minYcrOut) → uint256`

Swap yceIn YCE for at least minYcrOut YCR. Same approval requirement on the YCE side.

Mobile integration example

import { ethers } from "ethers";

const CONVERTER = "0xb7646654d1fd946e8a8bc32b5786a571be5925f2";
const YCR       = "0x6afd8143a2d213067a31abe5adf0d458a0df532b";

const ycr = new ethers.Contract(YCR, [
  "function approve(address,uint256) returns (bool)",
  "function allowance(address,address) view returns (uint256)",
], wallet);

const conv = new ethers.Contract(CONVERTER, [
  "function swapYCRForYCE(uint256,uint256) returns (uint256)",
  "function quoteYCRForYCE(uint256) view returns (uint256)",
  "function reserves() view returns (uint256, uint256)",
  "function currentXWad() view returns (uint256)",
], wallet);

const amountIn = ethers.parseEther("100"); // 100 YCR

if ((await ycr.allowance(wallet.address, CONVERTER)) < amountIn) {
  await (await ycr.approve(CONVERTER, amountIn, { gasLimit: 120_000n, type: 0 })).wait();
}

const expected = await conv.quoteYCRForYCE(amountIn);
const minOut   = expected * 99n / 100n; // 1% slippage

const tx = await conv.swapYCRForYCE(amountIn, minOut, { gasLimit: 250_000n, type: 0 });
const receipt = await tx.wait();
console.log("swapped, status:", receipt.status);

Burn mechanism

Each swap burns 2% of the input token. The burn flows through BurnManager and emits a Burn(address token, uint256 amount, Source source) event. Track totals via YCR.totalBurned() / YCE.totalBurned().

​Read methods

​reserves() → (uint256 r_ycr, uint256 r_yce)

​currentXWad() → uint256

​quoteYCRForYCE(uint256 ycrIn) → uint256

​quoteYCEForYCR(uint256 yceIn) → uint256

​Write methods

​swapYCRForYCE(uint256 ycrIn, uint256 minYceOut) → uint256

​swapYCEForYCR(uint256 yceIn, uint256 minYcrOut) → uint256

​Mobile integration example

​Burn mechanism

Read methods

`reserves() → (uint256 r_ycr, uint256 r_yce)`

`currentXWad() → uint256`

`quoteYCRForYCE(uint256 ycrIn) → uint256`

`quoteYCEForYCR(uint256 yceIn) → uint256`

Write methods

`swapYCRForYCE(uint256 ycrIn, uint256 minYceOut) → uint256`

`swapYCEForYCR(uint256 yceIn, uint256 minYcrOut) → uint256`

Mobile integration example

Burn mechanism