Module near_sdk::env

Blockchain-specific methods available to the smart contract. This is a wrapper around a low-level BlockchainInterface. Unless you know what you are doing prefer using env::* whenever possible. In case of cross-contract calls prefer using even higher-level API available through callback_args, callback_args_vec, ext_contract, Promise, and PromiseOrValue.

Constants

BLOCKCHAIN_INTERFACE	Low-level blockchain interface wrapped by the environment. Prefer using env::* and testing_env for interacting with the real and fake blockchains.
STORAGE_PRICE_PER_BYTE	Price per 1 byte of storage from mainnet genesis config. TODO: will be using the host function when it will be available.

Functions

account_balance	The balance attached to the given account. This includes the attached_deposit that was attached to the transaction
account_locked_balance	The balance locked for potential validator staking.
attached_deposit	The balance that was attached to the call that will be immediately deposited before the contract execution starts
block_index	Current block index.
block_timestamp	Current block timestamp, i.e, number of non-leap-nanoseconds since January 1, 1970 0:00:00 UTC.
current_account_id	The id of the account that owns the current contract.
epoch_height	Current epoch height.
input	The input to the contract call serialized as bytes. If input is not provided returns None.
is_valid_account_id	Returns true if the given account ID is valid and false otherwise.
keccak256	Hashes the random sequence of bytes using keccak256.
keccak512	Hashes the random sequence of bytes using keccak512.
log	Log the UTF-8 encodable message.
panic	Terminates the execution of the program with the UTF-8 encoded message.
predecessor_account_id	The id of the account that was the previous contract in the chain of cross-contract calls. If this is the first contract, it is equal to signer_account_id.
prepaid_gas	The amount of gas attached to the call that can be used to pay for the gas fees.
promise_and	Creates a new promise which completes when time all promises passed as arguments complete.
promise_batch_action_add_key_with_full_access
promise_batch_action_add_key_with_function_call
promise_batch_action_create_account
promise_batch_action_delete_account
promise_batch_action_delete_key
promise_batch_action_deploy_contract
promise_batch_action_function_call
promise_batch_action_stake
promise_batch_action_transfer
promise_batch_create
promise_batch_then
promise_create	Creates a promise that will execute a method on account with given arguments and attaches the given amount and gas.
promise_result	If the current function is invoked by a callback we can access the execution results of the promises that caused the callback.
promise_results_count	If the current function is invoked by a callback we can access the execution results of the promises that caused the callback. This function returns the number of complete and incomplete callbacks.
promise_return	Consider the execution result of promise under promise_idx as execution result of this function.
promise_then	Attaches the callback that is executed after promise pointed by promise_idx is complete.
random_seed	Get random seed from the register.
read_register	Reads the content of the register_id. If register is not used returns None.
register_len	Returns the size of the register. If register is not used returns None.
set_blockchain_interface	Replaces the current low-level blockchain interface accessible through env::* with another low-level blockchain interfacr that implements BlockchainInterface trait. In most cases you want to use testing_env! macro to set it.
setup_panic_hook	Setups panic hook to expose error info to the blockchain.
sha256	Hashes the random sequence of bytes using sha256.
signer_account_id	The id of the account that either signed the original transaction or issued the initial cross-contract call.
signer_account_pk	The public key of the account that did the signing.
state_exists	Returns true if the contract state exists and false otherwise.
state_read	Load the state of the given object.
state_write
storage_byte_cost
storage_get_evicted	Reads the most recent value that was evicted with storage_write or storage_remove command.
storage_has_key	Checks if there is a key-value in the storage.
storage_read	Reads the value stored under the given key.
storage_remove	Removes the value stored under the given key. If key-value existed returns true, otherwise false.
storage_usage	Current total storage usage of this smart contract that this account would be paying for.
storage_write	Writes key-value into storage. If another key-value existed in the storage with the same key it returns true, otherwise false.
take_blockchain_interface	Removes and returns the current low-level blockchain interface accessible through env::*. It is not meant to be used by the contract developers directly. In most cases you want to use testing_env! macro for your use cases.
used_gas	The gas that was already burnt during the contract execution (cannot exceed prepaid_gas)
validator_stake	For a given account return its current stake. If the account is not a validator, returns 0.
validator_total_stake	Returns the total stake of validators in the current epoch.
value_return	Sets the blob of data as the return value of the contract.