Function db_lookup 

pub(crate) fn db_lookup(
    ctx: FunctionEnvMut<'_, Env>,
    ptr: WasmPtr<u8>,
    ptr_len: u32,
) -> i64

Lookup an on-chain database handle from its name. If it exists, push it to the list of db_handles.

Returns the index of the DbHandle in the db_handles Vector on success. Otherwise, returns an error value.

This function can be called from any ContractSection.

Permissions

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