Cross-Chain Transfer

How to Transfer ELA to ESC

• Use compile ELA-Client

• Create topup transaction: ./ela-cli wallet -t create --deposit eth_address(ETH address) --amount recharge_value(amount ela units) --fee recharge_fee(fee ela units)

• Sign transaction: ./ela-cli wallet -t sign --file to_be_signed.txn -p yourpassword(your keystore password)

• Send transaction: ./ela-cli wallet -t send --file ready_to_send.txn

How to Withdraw ETH to ELA

• Sse node console: node

• Use contract code:

Web3 = require("web3");
// set web3 uri
web3 = new Web3("http://127.0.0.1:20636");
// set withdraw contract
contract = new web3.eth.Contract([{"constant":false,"inputs":[{"name":"_addr","type":"string"},{"name":"_amount","type":"uint256"},{"name":"_fee","type":"uint256"}],"name":"receivePayload","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_addr","type":"string"},{"indexed":false,"name":"_amount","type":"uint256"},{"indexed":false,"name":"_crosschainamount","type":"uint256"},{"indexed":true,"name":"_sender","type":"address"}],"name":"PayloadReceived","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_sender","type":"address"},{"indexed":false,"name":"_amount","type":"uint256"},{"indexed":true,"name":"_black","type":"address"}],"name":"EtherDeposited","type":"event"}]);
// set eth account address
contract.options.address = deploy_contract_address;
// set account contract keystore info
acc = web3.eth.accounts.decrypt(keystore_content, ketstore_password);   
// call receivePayload function，params：(ELA main chain address，amount(In ela up to convert wei 10000000000)，fee)
cdata  = contract.methods.receivePayload(ELA_address, withdraw_amount, fee).encodeABI();
// gas minimum is 3000000，gasPrice is any value
tx = {data: cdata, to: contract.options.address, from: acc.address, gas: "3000000", gasPrice: "20000000000"};
// send transaction amount(use receivePayload function amount)
tx.value = withdraw_amount;
acc.signTransaction(tx).then((res)=>{
   console.log("coming");
   stx = res;
   console.log(stx.rawTransaction);
   web3.eth.sendSignedTransaction(stx.rawTransaction).then(console)});

Note:

• ELA testnet server Deploy Contract Address:

0x491bC043672B9286fA02FA7e0d6A3E5A0384A31A

• ELA mainnet server Deploy Contract Address:

0xC445f9487bF570fF508eA9Ac320b59730e81e503