tccl v0.3.0

First release as a standalone repository, extracted from thecoin (commit 8f620ea) with history preserved.

Language version 2 (new; not active on The Coin yet)

• Records with named fields; construction with every field named; field reads and writes in locals and storage.
• Enums (named situations) with optional allowed transitions, checked whenever a value is stored.
• Roles, grant, revoke, name.has(address), only on actions, fn and upgrade(); automatic RoleGranted/RoleRevoked events.
• Interfaces and calls between contracts, with value, origin; re-entrancy always rejected; atomic transactions; contract depth 8; calls into version 1 contracts rejected.
• Modules (use, module sections, tccl bundle) and the standard library std.token, std.items, std.payments, frozen per language version with source hashes recorded in programs.
• upgrade() and upgrade compatibility rules (tccl::upgrade::check); upgrade authority model in the simulator.
• Built-ins mul_div, isqrt, pow, code_hash, is_contract, is_final; to_text of enums; payable before or after the return type.
• Program encoding: version 1 layout unchanged; version 2 appends records, enums, interfaces, roles, access, modules and effects.

Security (consensus-relevant for version 2)

• Found that version 1 prices copies and decodes by bytes, not allocations: adversarial contracts reach 1 400–2 100 ns per fuel (≈ 100× the calibration). Version 2 charges per allocation (4 per copied, 6 per decoded allocation), reads xs[i]/len(xs) without copying, and limits memory to 16 MiB per transaction. ExecOptions::harden_v1 applies the same rules to version 1 programs when a network activates it. See docs/en/security.md and implant-the-coin-language.md.

Compatibility

• Language version 1 compiler frozen in crates/tccl/src/v1; differential tests (crates/tccl-compat) compare 10 218 sources and 3 960 calls with the deployed engine: identical bytes, errors, results, fuel, storage, events and payments.

Tools

• tccl CLI: new, check (errors with line/column, code, explanation and fix in EN/PT-BR/ES), abi, bundle, run (deploy, call, view, upgrade, authority, state; fee and deposit estimates), test (scenarios), explain, docs errors, bench, ring.
• Simulator: calls between contracts, upgrade authority, decoded state, fee and deposit estimates.
• WebAssembly engine and browser playground at https://tccl.the-coin.cloud.
• Installers: install.sh (Linux), install.ps1 and MSI (Windows), .deb; release automation with checksums.
• Documentation in English, Brazilian Portuguese and Spanish; tested recipes.