logsomething

Overview

The purpose of the logsomething smart contract is to provide a service such that a user can log something to the blockchain by storing it in the smart contract's table.

Parties Involved

Logger

Logger refers to the party creating or deleting a log from the smart contract's table.

Smart Contract Account

Smart Contract Account refers to the party who can set the dependency account names. This is the account the smart contract is set to.

Functionalities

• a logger can create a log
• a logger can delete a log

Actions

createlog

Definition

ACTION createlog(name who, string what);

Parameters

who
This is the account who is creating the log.

what
This is the content being logged.

Checks

• who has signed logsomething's most recent EULA, if it exists
• who has appropriate keys for who account

Results

This action creates a log with the specified content.

deletelog

Definition

ACTION deletelog(uint64_t log_id, name who);

Parameters

log_id
This is the id of the log being deleted.

who
This is the account who is deleting the log.

Checks

• who has appropriate keys for who account
• who has signed logsomething's most recent EULA, if it exists
• log_id exists
• who is the account who created the log

Results

This action deletes a log with the specified id.

setdep

Definition

ACTION setdep(vector<name> smart_contract_dependency_actual_names);

Parameters

smart_contract_dependency_actual_names
This is the id of the log being deleted.

Checks

• the Smart Contract Account has appropriate keys for the Smart Contract Account
• smart_contract_dependency_actual_names and smart_contract_dependency_expected_names (this is an internal const set by the developer) have the same length

Results

This action sets the actual names of the smart contract dependencies.

Tables

log

Definition

TABLE log
{
    uint64_t id;
    name who;
    string what;
    time_point_sec when;
    uint64_t primary_key() const { return id; }
    uint64_t by_who() const { return who.value; }
};
typedef multi_index<name("log"), log, indexed_by<name("bywho"), const_mem_fun<log, uint64_t, &log::by_who>>> log_index;

Parameters

id
This is the id of the log table. This is the primary key for the row.

who
This is the account who created the log.

what
This is the content of the log.

when
This is the time stamp of when the log was created.

dependency

Definition

TABLE dependency
{
    vector<name> expected;
    vector<name> actual;
};
typedef singleton<name("dependency"), dependency> dependency_index;

Parameters

expected
This is the expected list of account names for smart contract dependencies.

actual
This is the actual list of account names for smart contract dependencies.