Mantle

Preview chain. Sauce supports transactions on Ethereum, Base, Arc and Solana, and the testnets Arc Testnet, Base Sepolia, Ethereum Sepolia, Solana Devnet and Solana Testnet only. On Mantle a program compiles (sauce compile) and the reads work (sauce globals, sauce price, sauce pools), and sauce simulate runs wherever the release is deployed on the chain, but the sauce command and the MCP server build and send no transaction: sauce tx, sauce run and sauce pot --deploy are refused, naming this chain and the supported chains: the last section shows the refusal and how to request this chain.

Fact	Value
Support	preview: compile and read; no transaction is built or sent
Slug (`--chain`)	`mantle`
Chain id	5000
Kind	EVM
Name in a program	`Mantle`
In TypeScript	`import { Mantle } from "@eco-incorp/sauce"`: its tokens and protocol namespaces are properties of it
Native coin	MNT (MNT), 18 decimals
Sauce	the engine, Kitchen and Routers, at the same addresses on every EVM chain: Deployments

In a program

Compiled with --chain mantle, a program names Mantle’s tokens and contracts with no import; the same file compiled for another chain resolves each name there, or fails where the chain does not have it.

function main() {
  // `USDT0` is Mantle's USDT0: `0x779Ded0c9e1022225f8E0630b35a9b54bE713736`.
  const held = USDT0.balanceOf(pot);
  // `Token(address)` is any other ERC-20, and works for a symbol's address too.
  require(Token(USDT0).balanceOf(pot) == held);
}

Tokens

Symbol	Address	Decimals
`USDT0`	`0x779Ded0c9e1022225f8E0630b35a9b54bE713736`	6

Protocols

The registry records no protocol deployment on this chain.

Requesting support

On Mantle, sauce tx, sauce run and sauce pot --deploy exit with status 1 before they reach an endpoint or read a key. The first line sauce tx prints is:

sauce tx: building the cook transaction is refused: it involves mantle (Mantle, chain id 5000), a preview chain. The sauce command and its MCP server build and send transactions only on Ethereum, Base, Arc and Solana, and the testnets Arc Testnet, Base Sepolia, Ethereum Sepolia, Solana Devnet and Solana Testnet. On a preview chain they build and send none. A program still compiles there and globals, price, pools and pot's prediction still read; simulate runs wherever the release is deployed on the chain, and says so where it is not.

To request Mantle, contact Eco through Support and community, naming the chain and its id (Mantle, 5000) and what you want to run there.

Next steps

Chains: every other chain, with its support.
Names and registries: how a name in a program becomes an address on the chain it is compiled for.
Glossary: the words these pages use, in plain terms.

Start here

Integration guides

Language reference

SauceScript libraries

Runtime and security

Troubleshooting and production

Chains and protocols

@eco-incorp/sauce

@eco-incorp/sauce-compiler

In a program

Tokens

Protocols

Requesting support

Next steps

​In a program

​Tokens

​Protocols

​Requesting support

​Next steps

In a program

Tokens

Protocols

Requesting support

Next steps