1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108
use ckb_occupied_capacity::Result as CapacityResult; use crate::{core::Capacity, packed, prelude::*}; impl packed::Script { pub fn occupied_capacity(&self) -> CapacityResult<Capacity> { Capacity::bytes(self.args().raw_data().len() + 32 + 1) } } impl packed::CellOutput { pub fn occupied_capacity(&self, data_capacity: Capacity) -> CapacityResult<Capacity> { Capacity::bytes(8) .and_then(|x| x.safe_add(data_capacity)) .and_then(|x| self.lock().occupied_capacity().and_then(|y| y.safe_add(x))) .and_then(|x| { self.type_() .to_opt() .as_ref() .map(packed::Script::occupied_capacity) .transpose() .and_then(|y| y.unwrap_or_else(Capacity::zero).safe_add(x)) }) } pub fn is_lack_of_capacity(&self, data_capacity: Capacity) -> CapacityResult<bool> { self.occupied_capacity(data_capacity) .map(|cap| cap > self.capacity().unpack()) } } impl packed::CellOutputBuilder { pub fn build_exact_capacity( self, data_capacity: Capacity, ) -> CapacityResult<packed::CellOutput> { Capacity::bytes(8) .and_then(|x| x.safe_add(data_capacity)) .and_then(|x| self.lock.occupied_capacity().and_then(|y| y.safe_add(x))) .and_then(|x| { self.type_ .to_opt() .as_ref() .map(packed::Script::occupied_capacity) .transpose() .and_then(|y| y.unwrap_or_else(Capacity::zero).safe_add(x)) }) .map(|x| self.capacity(x.pack()).build()) } } impl packed::CellOutputVec { pub fn total_capacity(&self) -> CapacityResult<Capacity> { self.as_reader() .iter() .map(|output| { let cap: Capacity = output.capacity().unpack(); cap }) .try_fold(Capacity::zero(), Capacity::safe_add) } } #[cfg(test)] mod tests { use crate::{ core::{capacity_bytes, Capacity}, packed, prelude::*, }; #[test] fn script_occupied_capacity() { let testcases = vec![ (vec![], 32 + 1), (vec![0], 1 + 32 + 1), (vec![1], 1 + 32 + 1), (vec![0, 0], 2 + 32 + 1), ]; for (args, ckb) in testcases.into_iter() { let script = packed::Script::new_builder().args(args.pack()).build(); let expect = Capacity::bytes(ckb).unwrap(); assert_eq!(script.occupied_capacity().unwrap(), expect); } } #[test] fn min_cell_output_capacity() { let lock = packed::Script::new_builder().build(); let output = packed::CellOutput::new_builder().lock(lock).build(); assert_eq!( output.occupied_capacity(Capacity::zero()).unwrap(), capacity_bytes!(41) ); } #[test] fn min_secp256k1_cell_output_capacity() { let lock = packed::Script::new_builder() .args(vec![0u8; 20].pack()) .build(); let output = packed::CellOutput::new_builder().lock(lock).build(); assert_eq!( output.occupied_capacity(Capacity::zero()).unwrap(), capacity_bytes!(61) ); } }