General description for predefined scripts

readme.md

1. Implement a set of predefined verification fuctions. These fuctions signature should be like this

fn(address, stdTx, ...parameters){
}

2. Add a new transaction type. With the new transaction, each address can specify on what transaction, execute which verification functions and corresponding parameters:

|key                                 | value          | type      |
|------------------------------------| -------------- |-----------|
|"func"+address+transactionType      | function names |[]string   |
|"param"+address+transactionType     | parameter list |[][]string |

3. In checkTx, iterate all Involved Addresses and do these operations:

• According to transaction type and address, get all function names which need to be executed and corresponding parameters.
• Execute each fuction with its corresponding parameters.
• Once a verification fuctions fails, all subsequent checks will be aborted, and the tx will be marked as failed.