Ability to process one transaction-related entity which contains multiple transaction information

[eanzhao]

Expected Behavior

AElf node will have the ability to handle MultiTransaction message, extract transactions of own chain id, then process these transactions.

Features:

• Add new protobuf type: MultiTransaction
• Add new web API sendMultiTransaction

Development Tasks:

• MultiTransaction type
• sendMultiTransaction web api

[loning]

sendMultiTransaction
What is MultiTransaction，Why not TransactionCollection？

[eanzhao]

sendMultiTransaction What is MultiTransaction，Why not TransactionCollection？

Compared to a collection of transactions, this structure is more like aggregating multiple transactions of the same person into one transaction, which only requires one signature; If it is called a TransactionCollection, each transaction seems to have an independent signature.