Integrate an Exchange


The objective of this document is to provide a brief overview of how to integrate with the EVM-Compatible MAP Relay Chain. For teams that already support ETH, supporting the MAP Relay Chain is as straightforward as spinning up an MAP Relay Chain node (atlas) (which has the same API as go-ethereum) and populating MAP Relay Chain ID (22776) when constructing transactions.

Integration using MAP Relay Chain Endpoints

Running an atlas node

you can get it from source code or release versin.

from source code:

// make sure the golang env

git clone
cd atlas
git checkout release_v1
make atlas

then start a node with the RPC service on the background,use ./build/bin/atlas -h get more details.

./build/bin/atlas --datadir ./data --gcmode "archive" --syncmode "full" --port 28360 --v5disc --http --http.addr "" --http.api eth,web3,net,debug,txpool,header,istanbul --http.corsdomain "*" --http.vhosts "*" 

Interacting with the Atlas

Interacting with the Atlas node is identical to interacting with go-ethereum. You can find the reference material for Atlas API here.

Please note that personal_ namespace is turned off by default. To turn it on, you need to pass the appropriate command line .

Java SDK and Web3.js

you can use the Java SDK and web3.js libs interacting with the atlas.

If you plan on extracting data from the Atlas into your own systems using golang, we recommend using our custom ethclient.

Constructing transactions

MAP Relay chain transactions are identical to standard EVM transactions with one exceptions::

They must be signed with MAP Relay Chain ChainID (22776).

For development purposes, MAP Relay Chain supports all the popular tooling for Ethereum,like as MetaMask and Remix,Truffle and Hardhat, so developers familiar with Ethereum and Solidity can feel right at home.

We are compatible with the improvement of Ethereum eip1559, and set the minimum base fee to 100GWei.

ps: MAP Relay Chain consensus provides fast and irreversible finality with 5 seconds. To query the most up-to-date finalized block, query any value (i.e. block, balance, state, etc.) with the latest parameter.

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