On this page
Fees & the tXDS coin
The coin#
| Mainnet coin | XDS (no mainnet exists yet) |
| Testnet / dev coin | tXDS |
| Decimals | 18 |
| Smallest unit | "dev": 1 XDS = 10¹⁸ dev (the same ratio as ETH to wei) |
How fees work (EIP-1559)#
xDEVS Chain uses Ethereum's EIP-1559 fee model, so wallets estimate fees exactly as on Ethereum.
- Every block has a base fee that rises when blocks are more than half full and falls when they are less than half full, by at most 12.5% per block.
- The base fee never drops below a minimum of 0.1 gwei (an anti-spam floor).
- Users add a priority fee (tip) on top.
Where the fee goes#
| Part | Destination |
|---|---|
| Base fee × gas used, 80% | Burned |
| Base fee × gas used, 20% | Treasury contract (0x…1002), spent on grants and public goods by governance |
| Priority fee (tip) | The block producer's fee recipient (--fee-recipient on the dev node) |
This split works today on the dev chain. Under heavy use the burn can exceed new issuance, making the supply deflationary.
Dev chain values#
From the built-in dev genesis:
| Parameter | Value |
|---|---|
| Initial base fee | 1 gwei |
| Minimum base fee | 0.1 gwei |
| Elasticity (target = gas limit / 2) | 2 |
| Max change denominator (12.5%) | 8 |
| Burn share | 8,000 bps (80%) |
| Block gas limit | 30,000,000 |
| Block time | 2 s |
On the dev node, the default --fee-recipient is the zero address, so tips go there unless you set one.
Governance#
On the public networks, the FeeConfig contract (0x…1003) holds parameters such as the gas limit, minimum base fee and burn share, and only Governance (a stake-weighted vote plus a timelock) can change them. FeeConfig is built and tested but not yet wired into the dev genesis.
Planned: local fee markets (Phase 5)#
On Ethereum, one popular mint makes everyone pay more. xDEVS Chain plans local fee markets: if a single contract uses more than 25% of block gas, transactions to it pay an extra local base fee that rises and decays like EIP-1559, while everyone else keeps paying the normal fee. The price will be exposed through xdevs_localFee(address). The first version is keyed by the top-level to address only.
Planned: gas sponsorship#
Apps can pay their users' gas through the paymaster, and an example paymaster accepts approved stablecoins. These are built as contracts; using them on a network needs the predeploys and an ERC-4337 bundler.
Planned testnet supply#
These numbers are from the implementation plan and apply to the future public testnet only. Mainnet tokenomics will be designed separately, with legal advice.
| Genesis supply | 1,000,000,000 tXDS |
| Issuance | 7% in year 1, −1% per year, floor 2%, paid as staking rewards |
| Burn | 80% of base fees |
| Genesis allocation | Share |
|---|---|
| Faucet & community reserve | 30% |
| Ecosystem grants | 25% |
| Treasury (governance) | 20% |
| Core development | 15% |
| Genesis validators' stake | 5% |
| Reserve (incentivized testnet) | 5% |