external_calls.py

# python3 external_calls.py .
# python3 external_calls.py file.sol
# python3 external_calls.py 0xdead
import sys
from slither import Slither
from slither.slithir.operations import HighLevelCall

sl = Slither(sys.argv[1])

for contract in sl.contracts_derived:
  for function in contract.functions_entry_points: # if you only want reentrant functions, use `function.is_reentrant`
    for node in function.nodes:
      for op in node.irs:
        if isinstance(op, HighLevelCall): # if you want to exclude view calls, add `and isinstance(op.function, Function)`
          print(f"External call: {node.source_mapping.content} {node.source_mapping}")

# Other useful APIs:
# Get functions reading from a variable: https://crytic.github.io/slither/slither/core/declarations/contract.html#Contract.get_functions_reading_from_variable
# Get functions writing to a variable: https://crytic.github.io/slither/slither/core/declarations/contract.html#Contract.get_functions_writing_to_variable
# Get state variables read or written in reentrant functions: https://crytic.github.io/slither/slither/core/declarations/contract.html#Contract.state_variables_used_in_reentrant_targets