code: def finalize(state, block):
      
  
      if state.is_METROPOLIS():
          br = state.config['BYZANTIUM_BLOCK_REWARD']
          nr = state.config['BYZANTIUM_NEPHEW_REWARD']
      else:
          br = state.config['BLOCK_REWARD']
          nr = state.config['NEPHEW_REWARD']
          
      delta = int(br + nr * len(block.uncles))
      state.delta_balance(state.block_coinbase, delta)
  
      udpf = state.config['UNCLE_DEPTH_PENALTY_FACTOR']
  
      for uncle in block.uncles:
          r = int(br * (udpf + uncle.number - state.block_number) // udpf)
          state.delta_balance(uncle.coinbase, r)
  
      if state.block_number - \
              state.config['MAX_UNCLE_DEPTH'] in state.recent_uncles:
          del state.recent_uncles[state.block_number -
                                  state.config['MAX_UNCLE_DEPTH']]
docs: Apply rewards and commit.