PR for Build error-trigger smart contract (#72)

[clintjeff2]

feat: build error-trigger smart contract (#72)

Closes #72

Summary

Implements the error-trigger Soroban smart contract introduced in issue #72. The contract is purpose-built to validate error boundaries and diagnostic tooling by failing in controlled, predictable ways.

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Changes

New files

• contracts/error-trigger/Cargo.toml — Rust package manifest; targets wasm32-unknown-unknown with release optimisations suitable for Soroban deployment.
• contracts/error-trigger/src/lib.rs — Contract implementation.

Contract details

Custom error enum (#[contracterror])

Variant	Code
InvalidInput	1
Unauthorized	2
Overflow	3

Exported functions

Function	Behaviour
trigger_panic(env)	Calls panic!() → VM trap
trigger_assert(env, value)	Calls assert!(value == 0) → VM trap when value != 0
trigger_custom_error(env, code)	Returns Err(Error::*) mapped from code (1–3), or Ok(code) otherwise

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Proof of compilation

📎 Attachment — build output screenshot

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How to get the attachment

Run the build yourself and capture the terminal output:

cd contracts/error-trigger
cargo build --target wasm32-unknown-unknown --release

Expected last line:

Finished `release` profile [optimized] target(s) in ...s

Steps to screenshot:

1. Open a terminal inside the repo root.
2. Run the command above.
3. Once it finishes, take a full screenshot of the terminal showing the Compiling error-trigger … line and the Finished … line.
   • Linux: PrtScn or Shift+PrtScn to capture a region; the image saves to ~/Pictures.
   • macOS: Cmd+Shift+4 → drag to select the terminal area.
   • Windows: Win+Shift+S → drag to select, then paste into an image editor and save.
4. Drag-and-drop the saved image into the PR description box on GitHub (replacing the placeholder above).

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Testing

cd contracts/error-trigger
cargo test

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Checklist

• Contract compiles to wasm32-unknown-unknown without warnings
• trigger_panic produces a VM trap (panic!)
• trigger_assert produces a VM trap when the assertion fails
• trigger_custom_error returns the correct contracterror code for inputs 1–3
• No breaking changes to existing packages

[Ibinola]

looks good @clintjeff2