Package - @sec-block/secjs-datahandler

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SECDataHandler

This package uses leveldb to store and handle data from SEC blockchain, this repository includes operations to four databases:

Token Block Chain Database
Transaction Block Chain Database
Account Database
Product Database

The databases contain following methods:

TokenBlockChainDB

Kind: global class

TokenBlockChainDB
- new TokenBlockChainDB(config)
- .writeTokenBlockToDB(tokenData, callback) ⇒ None
- .isTokenBlockChainDBEmpty(callback) ⇒ None
- .getTokenBlockChainDB(callback) ⇒ None
- .getTokenBlockFromDB(blockHashArray, callback) ⇒ None
- .getTokenChain(minBlockNumber, maxBlockNumber, callback) ⇒ None
- .delBlocksFromHeight(blockHeight, callback) ⇒ None
- .addUpdateBlock(pos, blockArray, callback) ⇒ None
- .findTxForUser(userAddress, callback) ⇒ None
- .findTx(userAddress, callback) ⇒ None

AccountDB

Kind: global class

AccountDB
- new AccountDB(config)
- .writeUserInfoToAccountDB(accDataList, callback) ⇒ None
- .readUserInfofromAccountDB(accNameList) ⇒ Promise Object
- .isAccountDBEmpty(callback) ⇒ None
- .getAccountDB(callback) ⇒ None
- .isAccountInAccountDB(accName, callback) ⇒ None

ProductDB

Kind: global class

ProductDB
- new ProductDB(config)
- .writeTxBlockToDB(txData, callback) ⇒ None
- .isProductDBEmpty(callback) ⇒ None
- .getProductDB(callback) ⇒ None

TokenBlockChainDB Methods

new TokenBlockChainDB(config)

Param	Type	Description
config	`Object`	contains the relative path for storing database

tokenBlockChainDB.writeTokenBlockToDB(tokenData, callback) ⇒ `None`

Write single token block or full token chain data to database

Kind: instance method of TokenBlockChainDB

Param	Type	Description
tokenData	`Array, Object`	single token block data or full token block chain data
callback	`function`	callback function, returns error if exist

tokenBlockChainDB.isTokenBlockChainDBEmpty(callback) ⇒ `None`

Check whether the token block chain database is empty

Kind: instance method of TokenBlockChainDB

Param	Type	Description
callback	`function`	callback function, callback arguments (err, emptyFlag)

tokenBlockChainDB.getTokenBlockChainDB(callback) ⇒ `None`

Get all the block datas from token block chain database

Kind: instance method of TokenBlockChainDB

Param	Type	Description
callback	`function`	callback function, callback arguments (err, block object array)

tokenBlockChainDB.getTokenBlockFromDB(blockHashArray, callback) ⇒ `None`

Get token blocks according to block hash values

Kind: instance method of TokenBlockChainDB

Param	Type	Description
blockHashArray	`String, Array`	block hash values, string or array format
callback	`function`	callback function, callback arguments (err, block object array)

tokenBlockChainDB.getTokenChain(minBlockNumber, maxBlockNumber, callback) ⇒ `None`

Get token block chain data, from number 'minBlockNumber' to number 'maxBlockNumber'

Kind: instance method of TokenBlockChainDB

Param	Type	Description
minBlockNumber	`Integer`	minimum block number
maxBlockNumber	`Integer`	maximum block number
callback	`function`	callback function, callback arguments (err, block object array)

tokenBlockChainDB.delBlocksFromHeight(blockHeight, callback) ⇒ `None`

Delete blocks which have a higher height than the input 'blockHeight' argument

Kind: instance method of TokenBlockChainDB

Param	Type	Description
blockHeight	`Integer`	blocks with larger height will be deleted from database
callback	`function`	callback function, callback arguments (err)

tokenBlockChainDB.addUpdateBlock(pos, blockArray, callback) ⇒ `None`

Add new blocks from a specific position if the blocks does not exist
Update old blocks from a specific position if the blocks already exist

Kind: instance method of TokenBlockChainDB

Param	Type	Description
pos	`Integer`	block add/update starting position
blockArray	`Array`	array of block data(json object)
callback	`function`	callback function, callback arguments (err)

tokenBlockChainDB.findTxForUser(userAddress, callback) ⇒ `None`

Find all previous transactions for a user

Kind: instance method of TokenBlockChainDB

Param	Type	Description
userAddress	`String`	user account address
callback	`function`	callback function, callback arguments (txArray, err)

tokenBlockChainDB.findTx(txHash, callback) ⇒ `None`

Find a previous transactions for a user by transaction hash

Kind: instance method of TokenBlockChainDB

Param	Type	Description
txHash	`String`	transaction hash
callback	`function`	callback function, callback arguments (txArray, err)

AccountDB Methods