Function db_lookup 

pub fn db_lookup(
    contract_id: ContractId,
    db_name: &str,
) -> GenericResult<DbHandle>

Open an existing on-chain database instance for the given contract. A contract is able to read any on-chain database.

Returns a DbHandle which is used with methods for reading and writing.

Permissions

• ContractSection::Deploy
• ContractSection::Metadata
• ContractSection::Exec
• ContractSection::Update