[blockchain] Add methods for getValidatorKeys & getBlockSignerKeys (#7)

* [blockchain] Add methods for getValidatorKeys & getBlockSignerKeys

* [blockchain] Update documentation for new methods

* [test] Fix blockchain test ordering

pyhmy/blockchain.py

@@ -480,6 +480,30 @@ def get_block_signers(block_num, endpoint=_default_endpoint, timeout=_default_ti
     return rpc_request('hmy_getBlockSigners', params=params, endpoint=endpoint, timeout=timeout)['result']
 
 
+def get_block_signer_keys(block_num, endpoint=_default_endpoint, timeout=_default_timeout) -> list:
+    """
+    Get list of block signer public bls keys for specific block number
+
+    Parameters
+    ----------
+    block_num: int
+        Block number to get signer keys for
+    endpoint: :obj:`str`, optional
+        Endpoint to send request to
+    timeout: :obj:`int`, optional
+        Timeout in seconds
+
+    Returns
+    -------
+    list
+        List of bls public keys that signed the block
+    """
+    params = [
+        str(hex(block_num))
+    ]
+    return rpc_request('hmy_getBlockSignerKeys', params=params, endpoint=endpoint, timeout=timeout)['result']
+
+
 def get_validators(epoch, endpoint=_default_endpoint, timeout=_default_timeout) -> dict:
     """
     Get list of validators for specific epoch number
@@ -504,6 +528,30 @@ def get_validators(epoch, endpoint=_default_endpoint, timeout=_default_timeout)
     return rpc_request('hmy_getValidators', params=params, endpoint=endpoint, timeout=timeout)['result']
 
 
+def get_validator_keys(epoch, endpoint=_default_endpoint, timeout=_default_timeout) -> list:
+    """
+    Get list of validator public bls keys for specific epoch number
+
+    Parameters
+    ----------
+    epoch: int
+        Epoch to get list of validator keys for
+    endpoint: :obj:`str`, optional
+        Endpoint to send request to
+    timeout: :obj:`int`, optional
+        Timeout in seconds
+
+    Returns
+    -------
+    list
+        List of bls public keys in the validator committee
+    """
+    params = [
+        epoch
+    ]
+    return rpc_request('hmy_getValidatorKeys', params=params, endpoint=endpoint, timeout=timeout)['result']
+
+
 def get_bad_blocks(endpoint=_default_endpoint, timeout=_default_timeout) -> list:
     """
     Get list of bad blocks in memory of specific node

tests/sdk-pyhmy/test_blockchain.py

@@ -142,3 +142,15 @@ def test_get_bad_blocks(setup_blockchain):
     pytest.skip("Known error with hmy_getCurrentBadBlocks")
     bad_blocks = _test_blockchain_rpc(blockchain.get_bad_blocks)
     assert isinstance(bad_blocks, list)
+
+@pytest.mark.run(order=21)
+def test_get_validator_keys(setup_blockchain):
+    keys = _test_blockchain_rpc(blockchain.get_validator_keys, test_epoch_number)
+    assert isinstance(keys, list)
+    assert len(keys) > 0
+
+@pytest.mark.run(order=22)
+def test_get_block_signer_keys(setup_blockchain):
+    keys = _test_blockchain_rpc(blockchain.get_block_signer_keys, test_block_number)
+    assert isinstance(keys, list)
+    assert len(keys) > 0