exercism · 0xNeshi · Aug 4, 2025 · Aug 4, 2025 · Aug 4, 2025 · Aug 4, 2025
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
@@ -38,7 +38,7 @@ jobs:
       - name: Getting scarb
         uses: software-mansion/setup-scarb@v1
         with:
-          scarb-version: "2.9.2"
+          scarb-version: "2.12.0"
 
       - name: Verify all exercises
         env:
@@ -56,7 +56,7 @@ jobs:
       - name: Getting scarb
         uses: software-mansion/setup-scarb@v1
         with:
-          scarb-version: "2.9.2"
+          scarb-version: "2.12.0"
 
       - name: Format
         run: ./bin/format_exercises.sh --check

diff --git a/.tool-versions b/.tool-versions
@@ -1 +1 @@
-scarb 2.9.2
+scarb 2.12.0
diff --git a/README.md b/README.md
@@ -59,7 +59,7 @@ _Thoughtful suggestions will likely result faster & more enthusiastic responses
 
 ## Testing
 
-Tests currently use Cairo v2.9.2 (included with Scarb v2.9.2).
+Tests currently use Cairo v2.12.0 (included with Scarb v2.12.0).
 
 To test all exercises, run `./bin/verify-exercises`.
 This command will iterate over all exercises and check to see if their exemplar/example implementation passes all the tests.

diff --git a/bin/verify-exercises b/bin/verify-exercises
@@ -60,6 +60,8 @@ for exercise_path in $exercises; do
     tmp_dir=$(mktemp -d)
     trap 'rm -rf $tmp_dir' EXIT INT TERM
 
+    cp ".tool-versions" "$tmp_dir"
+
     # copy the exercise to the temporary directory
     contents_to_copy=(
         "src"

diff --git a/exercises/concept/airport-robot/Scarb.toml b/exercises/concept/airport-robot/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
diff --git a/exercises/concept/airport-robot/tests/airport_robot.cairo b/exercises/concept/airport-robot/tests/airport_robot.cairo
@@ -1,4 +1,4 @@
-use airport_robot::{Italian, French, say_hello};
+use airport_robot::{French, Italian, say_hello};
 
 #[test]
 fn test_say_hello_italian_name_without_spaces() {

diff --git a/exercises/concept/annalyns-infiltration/Scarb.toml b/exercises/concept/annalyns-infiltration/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
diff --git a/exercises/concept/annalyns-infiltration/tests/annalyns_infiltration.cairo b/exercises/concept/annalyns-infiltration/tests/annalyns_infiltration.cairo
@@ -1,4 +1,4 @@
-use annalyns_infiltration::{can_fast_attack, can_spy, can_signal_prisoner, can_free_prisoner};
+use annalyns_infiltration::{can_fast_attack, can_free_prisoner, can_signal_prisoner, can_spy};
 
 // The following tests are for the `can_fast_attack` function.
 

diff --git a/exercises/concept/calculator-conundrum/Scarb.toml b/exercises/concept/calculator-conundrum/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
diff --git a/exercises/concept/chrono-realms-chrono-chain/.meta/exemplar.cairo b/exercises/concept/chrono-realms-chrono-chain/.meta/exemplar.cairo
@@ -15,7 +15,7 @@ pub impl ChronoChainImpl of ChronoChainTrait {
         let mut span = arr.span();
         while let Option::Some(value) = span.pop_back() {
             chain = ChronoChain::Link((*value, BoxTrait::new(chain)));
-        };
+        }
 
         chain
     }

diff --git a/exercises/concept/chrono-realms-chrono-chain/Scarb.toml b/exercises/concept/chrono-realms-chrono-chain/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
diff --git a/exercises/concept/chrono-realms-chrono-chain/tests/chrono_realms_chrono_chain.cairo b/exercises/concept/chrono-realms-chrono-chain/tests/chrono_realms_chrono_chain.cairo
@@ -1,4 +1,4 @@
-use chrono_realms_chrono_chain::{ChronoChainTrait, ChronoChain};
+use chrono_realms_chrono_chain::{ChronoChain, ChronoChainTrait};
 
 const U32_MAX: u32 = 0xFFFFFFFF;
 
@@ -139,7 +139,7 @@ fn build_large_array() {
         assert_eq!(value, count);
         count += 1;
         chrono_chain = next.unbox();
-    };
+    }
 
     match chrono_chain {
         ChronoChain::End => (),
@@ -225,6 +225,6 @@ fn array_in_range(range: core::ops::Range<u32>) -> Array<u32> {
     let mut arr = array![];
     for elem in range {
         arr.append(elem);
-    };
+    }
     arr
 }
diff --git a/exercises/concept/chrono-realms/.meta/exemplar.cairo b/exercises/concept/chrono-realms/.meta/exemplar.cairo
@@ -1,4 +1,4 @@
-use core::traits::{Add, Sub, PartialOrd};
+use core::traits::{Add, PartialOrd, Sub};
 
 // Define the TimeShard struct
 #[derive(Drop, Debug, PartialEq)]

diff --git a/exercises/concept/chrono-realms/Scarb.toml b/exercises/concept/chrono-realms/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
diff --git a/exercises/concept/chrono-realms/src/lib.cairo b/exercises/concept/chrono-realms/src/lib.cairo
@@ -1,4 +1,4 @@
-use core::traits::{Add, Sub, PartialOrd};
+use core::traits::{Add, PartialOrd, Sub};
 
 // Define the TimeShard struct
 #[derive(Drop, Debug, PartialEq)]

diff --git a/exercises/concept/cryptographer/Scarb.toml b/exercises/concept/cryptographer/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
diff --git a/exercises/concept/election-day/.meta/exemplar.cairo b/exercises/concept/election-day/.meta/exemplar.cairo
@@ -1,5 +1,5 @@
-use core::to_byte_array::AppendFormattedToByteArray;
 use core::dict::Felt252Dict;
+use core::to_byte_array::AppendFormattedToByteArray;
 
 #[derive(Drop, Copy)]
 pub struct VoteCounter {

diff --git a/exercises/concept/election-day/Scarb.toml b/exercises/concept/election-day/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
diff --git a/exercises/concept/election-day/src/lib.cairo b/exercises/concept/election-day/src/lib.cairo
@@ -1,5 +1,5 @@
-use core::to_byte_array::AppendFormattedToByteArray;
 use core::dict::Felt252Dict;
+use core::to_byte_array::AppendFormattedToByteArray;
 
 #[derive(Drop, Copy)]
 pub struct VoteCounter {

diff --git a/exercises/concept/gross-store/Scarb.toml b/exercises/concept/gross-store/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
diff --git a/exercises/concept/health-statistics/Scarb.toml b/exercises/concept/health-statistics/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
diff --git a/exercises/concept/low-power-embedded-game/.meta/exemplar.cairo b/exercises/concept/low-power-embedded-game/.meta/exemplar.cairo
@@ -15,7 +15,7 @@ pub impl EvensImpl<T, +Drop<T>, +Copy<T>> of EvensTrait<T> {
                 result.append(*self.at(i));
             }
             i += 2;
-        };
+        }
         result
     }
 }

diff --git a/exercises/concept/low-power-embedded-game/Scarb.toml b/exercises/concept/low-power-embedded-game/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
diff --git a/exercises/concept/lucians-luscious-lasagna/Scarb.toml b/exercises/concept/lucians-luscious-lasagna/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
diff --git a/exercises/concept/magician-in-training/Scarb.toml b/exercises/concept/magician-in-training/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
diff --git a/exercises/concept/red-vs-blue-darwin-style/.meta/exemplar.cairo b/exercises/concept/red-vs-blue-darwin-style/.meta/exemplar.cairo
@@ -46,8 +46,7 @@ pub mod blue_remote_control_car_team {
 }
 
 pub mod combined {
-    use super::red_remote_control_car_team as Red;
-    use super::blue_remote_control_car_team as Blue;
+    use super::{blue_remote_control_car_team as Blue, red_remote_control_car_team as Red};
 
     #[derive(Drop)]
     pub struct CarBuilder {}

diff --git a/exercises/concept/red-vs-blue-darwin-style/Scarb.toml b/exercises/concept/red-vs-blue-darwin-style/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
diff --git a/exercises/concept/the-realm-of-echoes/.meta/exemplar.cairo b/exercises/concept/the-realm-of-echoes/.meta/exemplar.cairo
@@ -1,4 +1,4 @@
-use core::fmt::{Debug, Display, Formatter, Error};
+use core::fmt::{Debug, Display, Error, Formatter};
 
 pub fn format_magical_chant(chant1: ByteArray, chant2: ByteArray, chant3: ByteArray) -> ByteArray {
     format!("{chant1}-{chant2}-{chant3}")

diff --git a/exercises/concept/the-realm-of-echoes/Scarb.toml b/exercises/concept/the-realm-of-echoes/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
diff --git a/exercises/concept/the-realm-of-echoes/src/lib.cairo b/exercises/concept/the-realm-of-echoes/src/lib.cairo
@@ -1,4 +1,4 @@
-use core::fmt::{Debug, Display, Formatter, Error};
+use core::fmt::{Debug, Display, Error, Formatter};
 
 pub fn format_magical_chant(chant1: ByteArray, chant2: ByteArray, chant3: ByteArray) -> ByteArray {
     panic!("implement 'format_magical_chant'")

diff --git a/exercises/concept/welcome-to-tech-palace/.meta/exemplar.cairo b/exercises/concept/welcome-to-tech-palace/.meta/exemplar.cairo
@@ -8,7 +8,7 @@ pub fn add_border(welcome_msg: ByteArray, num_stars_per_line: u32) -> ByteArray
     let mut border: ByteArray = "";
     for _ in 0..num_stars_per_line {
         border.append_byte('*');
-    };
+    }
     border.clone() + "\n" + welcome_msg + "\n" + border
 }
 
@@ -17,15 +17,15 @@ pub fn clean_up_message(old_msg: ByteArray) -> ByteArray {
     let mut start = 0;
     while is_whitespace(old_msg[start]) || old_msg[start] == '*' {
         start += 1;
-    };
+    }
     let mut end = old_msg.len();
     while is_whitespace(old_msg[end - 1]) || old_msg[end - 1] == '*' {
         end -= 1;
-    };
+    }
     let mut clean_msg = "";
     for i in start..end {
         clean_msg.append_byte(old_msg[i]);
-    };
+    }
     clean_msg
 }
 
@@ -45,7 +45,7 @@ fn to_uppercase(input: u256) -> ByteArray {
     while remaining_bytes != 0 {
         uppercase_chars.append_byte(char_to_uppercase(get_last_byte(remaining_bytes)));
         remaining_bytes = remove_last_byte(remaining_bytes);
-    };
+    }
     uppercase_chars.rev()
 }
 

diff --git a/exercises/concept/welcome-to-tech-palace/Scarb.toml b/exercises/concept/welcome-to-tech-palace/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
diff --git a/exercises/concept/welcome-to-tech-palace/src/lib.cairo b/exercises/concept/welcome-to-tech-palace/src/lib.cairo
@@ -29,7 +29,7 @@ fn to_uppercase(input: u256) -> ByteArray {
     while remaining_bytes != 0 {
         uppercase_chars.append_byte(char_to_uppercase(get_last_byte(remaining_bytes)));
         remaining_bytes = remove_last_byte(remaining_bytes);
-    };
+    }
     uppercase_chars.rev()
 }
 

diff --git a/exercises/practice/acronym/.meta/example.cairo b/exercises/practice/acronym/.meta/example.cairo
@@ -12,7 +12,7 @@ pub fn abbreviate(phrase: ByteArray) -> ByteArray {
             capture = false;
         }
         i += 1;
-    };
+    }
 
     result
 }

diff --git a/exercises/practice/acronym/Scarb.toml b/exercises/practice/acronym/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
diff --git a/exercises/practice/all-your-base/.meta/example.cairo b/exercises/practice/all-your-base/.meta/example.cairo
@@ -26,7 +26,7 @@ pub fn rebase(digits: Array<u32>, input_base: u32, output_base: u32) -> Result<A
             break;
         }
         i += 1;
-    };
+    }
 
     if response > 0 || i == 0 {
         let x = *digits.at(i);
@@ -50,7 +50,7 @@ fn convert_to_base_10(digits: Array<u32>, input_base: u32) -> u32 {
         let pow = input_base.pow(exp);
         sum += *digit * pow;
         i += 1;
-    };
+    }
 
     sum
 }
@@ -66,7 +66,7 @@ fn convert_from_base_10(mut digits: u32, output_base: u32) -> Array<u32> {
         let remainder = digits % output_base;
         digits /= output_base;
         result.append(remainder);
-    };
+    }
 
     reverse_array(result)
 }
@@ -78,7 +78,7 @@ fn reverse_array(arr: Array<u32>) -> Array<u32> {
     while i > 0 {
         i -= 1;
         reversed.append(*arr[i]);
-    };
+    }
 
     reversed
 }
diff --git a/exercises/practice/all-your-base/Scarb.toml b/exercises/practice/all-your-base/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
diff --git a/exercises/practice/all-your-base/tests/all_your_base.cairo b/exercises/practice/all-your-base/tests/all_your_base.cairo
@@ -1,4 +1,4 @@
-use all_your_base::{rebase, Error};
+use all_your_base::{Error, rebase};
 
 #[test]
 fn single_bit_one_to_decimal() {

diff --git a/exercises/practice/allergies/.meta/example.cairo b/exercises/practice/allergies/.meta/example.cairo
@@ -38,7 +38,7 @@ pub impl AllergiesImpl of AllergiesTrait {
                 break;
             }
             index += 1;
-        };
+        }
         found && (*self.score & 2_u32.pow(index)) != 0
     }
 
@@ -49,7 +49,7 @@ pub impl AllergiesImpl of AllergiesTrait {
             if self.is_allergic_to(allergen) {
                 result.append(*allergen);
             }
-        };
+        }
         result
     }
 }
diff --git a/exercises/practice/allergies/Scarb.toml b/exercises/practice/allergies/Scarb.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2024_07"
 
 [dev-dependencies]
-cairo_test = "2.9.2"
+cairo_test = "2.12.0"
-Original file line number
+Diff line change
@@ Expand Up / @@ -15,7 +15,7 @@ pub impl ChronoChainImpl of ChronoChainTrait { @@
             let mut span = arr.span();
             while let Option::Some(value) = span.pop_back() {
                 chain = ChronoChain::Link((*value, BoxTrait::new(chain)));
-            };
+            }
             chain
         }
@@ Expand Down @@