Meta Transaction

A meta-transaction is essentially an operation that fulfils a fee payment in proxy. Address1 gives the transaction to be sent to Address2. And Address2 signs the information related to the fee deducti

Built Meta Transaction

• Obtain the original rawTransaction information.

• Parse raw transaction to get fields like nonce, gasprice, gaslimit, from address, to address, value, data, etc.

• Take the above fields, as well as the fee discount percentage and other fields, and encode them in RLP format as follows for example.

List result = new ArrayList();

result.add(RlpString.create(nonce));

result.add(RlpString.create(gasPrice));

result.add(RlpString.create(gasLimit));

result.add(RlpString.create(receiveAddress));

result.add(RlpString.create(value));

result.add(RlpString.create(data));

result.add(RlpString.create(sendAddress));

result.add(RlpString.create(feePercent));

result.add(RlpString.create(blockNumber));

result.add(RlpString.create(chainId));

RlpList rlpList = new RlpList(result);

this.rlpEncodeData = RlpEncoder.encode(rlpList);

• Sign the above data by the fee proxy address.

• Replace the data filed in the original transaction with the signed data and re-encode it as rawTransaction.

• Broadcast rawTransaction to blockchain；