Functions#

storage_read#

Reads data from contract storage at the specified slot and index.

Requirements#

  1. Sub-VM must be in deterministic mode

  2. index + buf_len must not exceed the Storage Slot length

storage_write#

Writes data to contract storage at the specified slot and index.

Requirements#

  1. Sub-VM must be in deterministic mode

  2. Sub-VM must have write storage permission

  3. index + buf_len must not exceed the Storage Slot length

  4. Sub-VM Storage slot must not be locked, unless the sender is in upgraders

get_balance#

Queries the balance of a specified contract address.

Result value is a 32 octets long little-endian unsigned integer

get_self_balance#

Gets the current contract’s balance, adjusted for the current transaction context. It is following: balance_before_transaction + message.value - value_consumed_by_current_tx

Result value is a 32 octets long little-endian unsigned integer

Requirements#

  • Contract must be in deterministic mode

gl_call#

Primary GenLayer WASI SDK function handling most intelligent contract operations. Takes serialized Calldata Encoded message buffer and dispatches to various blockchain operations based on message type.

Parameters: request (calldata buffer), request_len (buffer length), result_fd (output file descriptor)

Returns

  • error_success on success

  • error_inval for invalid requests

  • error_forbidden for permission violations

  • error_insufficient_balance for insufficient balance

See gl_call Messages for the list of available messages.