Improve Solidity ABI support in codegen, ink_env and ink_e2e

[davidsemakula]

Summary

Closes #_

• [y] y/n | Does it introduce breaking changes?
• [y] y/n | Is it dependent on a specific version of cargo-contract or pallet-revive?

Description

• Update trait definitions codegen to properly support Solidity ABI (i.e. generate trait info for Solidity selectors, and update related generated message builders, call builders and call forwarders)
• Make generated contract references and trait message builders and call forwarders generic over "ink" and "sol" ABI marker types, and update related macros (i.e. ink::contract_ref! and ink::message_builder!) to support ABI parameters
• More consistent naming of ABI marker types and corresponding generic type parameters (i.e. Abi for the generic type param and enum, and Ink and Sol for the marker types)
• Refactor Solidity selector computation utilities (prefer compile-time overhead over generating intermediate code)
• Add Solidity ABI encoding/decoding input and output guards for message and constructors parameter types and message return types (see ink::codegen::DispatchInputSol and ink::codegen::DispatchOutputSol docs)
• Introduce ink_env::build_call_abi<Environment, Abi>, ink_e2e::call_builder_abi<Contract, Abi> and ink_e2e::InstantiationResult::call_builder_abi<Contract, Abi> utilities
• Update call results abstractions in ink_e2e to support Solidity ABI encoded message calls (i.e. CallDryRunResult::message_result and CallDryRunResult::return_value)
• Don't generate ink! metadata generator (i.e. __ink_generate_metadata) for Solidity ABI only contracts

Checklist before requesting a review

• I have added an entry to CHANGELOG.md
• I have commented on my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works
• Any dependent changes have been merged and published in downstream modules

[github-actions]

🦑 📈 ink! Example Contracts ‒ Changes Report 📉 🦑

These are the results when building the integration-tests/* contracts from this branch with 0 and comparing them to ink! master:

Show Results

Contract	Upstream Size (kB)	PR Size (kB)	Diff (kB)	Diff (%)	Change
call-builder-return-value	20.807	20.806	-0.001	-0.00480607	📉
call-runtime	2.195	2.195	0	0	➖
combined-extension	2.51	2.51	0	0	➖
complex-storage-structures	4.296	4.296	0	0	➖
conditional-compilation	1.448	1.448	0	0	➖
contract-invocation	7.935	7.937	0.002	0.0252048	📈
contract-invocation/contract1	1.844	1.844	0	0	➖
contract-invocation/contract2	1.804	1.804	0	0	➖
contract-invocation/virtual_contract	4.222	4.222	0	0	➖
contract-invocation/virtual_contract_ver1	1.852	1.852	0	0	➖
contract-invocation/virtual_contract_ver2	1.864	1.864	0	0	➖
contract-storage	18.472	18.471	-0.001	-0.0054136	📉
contract-terminate	1.414	1.414	0	0	➖
contract-transfer	3.036	3.036	0	0	➖
contract-xcm	28.206	28.205	-0.001	-0.00354534	📉
cross-contract-calls	8.774	8.774	0	0	➖
cross-contract-calls/other-contract	1.524	1.524	0	0	➖
custom-allocator	3.012	2.977	-0.035	-1.16202	📉
custom-environment	2.23	2.23	0	0	➖
debugging-strategies	4.086	4.086	0	0	➖
dns	8.058	8.06	0.002	0.0248201	📈
e2e-call-runtime	1.674	1.673	-0.001	-0.0597372	📉
e2e-runtime-only-backend	2.25	2.25	0	0	➖
erc1155	19.194	19.193	-0.001	-0.00520996	📉
erc20	9.446	9.447	0.001	0.0105865	📈
erc721	11.034	11.035	0.001	0.0090629	📈
events	5.982	5.982	0	0	➖
flipper	1.597	1.597	0	0	➖
incrementer	1.284	1.284	0	0	➖
lang-err/call-builder	8.458	8.457	-0.001	-0.0118231	📉
lang-err/call-builder-delegate	3.136	3.136	0	0	➖
lang-err/constructors-return-value	2.225	2.226	0.001	0.0449438	📈
lang-err/contract-ref	7.626	7.626	0	0	➖
lang-err/integration-flipper	1.795	1.795	0	0	➖
lazyvec	4.908	4.908	0	0	➖
mapping	9.508	9.508	0	0	➖
mother	13.622	13.622	0	0	➖
multi-contract-caller	12.782	12.782	0	0	➖
multi-contract-caller/accumulator	1.141	1.141	0	0	➖
multi-contract-caller/adder	3.129	3.129	0	0	➖
multi-contract-caller/subber	3.137	3.137	0	0	➖
multisig	24.379	24.379	0	0	➖
own-code-hash	2.204	2.204	0	0	➖
payment-channel	11.014	11.014	0	0	➖
psp22-extension	7.379	7.379	0	0	➖
rand-extension	3.451	3.453	0.002	0.0579542	📈
runtime-call-contract	1.527	1.527	0	0	➖
solidity-abi/events	5.248	9.361	4.113	78.3727	📈
solidity-abi/sol-cross-contract	4.907	5.517	0.61	12.4312	📈
solidity-abi/sol-cross-contract/other-contract-sol	1.634	1.634	0	0	➖
solidity-abi/sol-cross-contract/other-contract-sol	1.634	2.474	0.84	51.4076	📈
solidity-abi/sol-encoding	1.56	2.403	0.843	54.0385	📈
solidity-abi/solidity-calls-flipper	6.253	7.615	1.362	21.7815	📈
sr25519-verification	0.957	0.957	0	0	➖
static-buffer	2.503	2.503	0	0	➖
storage-types	15.918	15.914	-0.004	-0.0251288	📉
trait-dyn-cross-contract-calls	3.579	3.579	0	0	➖
trait-dyn-cross-contract-calls/contracts/incrementer	1.589	1.589	0	0	➖
trait-erc20	9.746	9.747	0.001	0.0102606	📈
trait-flipper	1.449	1.449	0	0	➖
trait-incrementer	1.659	1.659	0	0	➖
upgradeable-contracts/delegator	5.877	5.877	0	0	➖
upgradeable-contracts/delegator/delegatee	2.621	2.621	0	0	➖
upgradeable-contracts/delegator/delegatee2	2.62	2.62	0	0	➖
upgradeable-contracts/set-code-hash	1.503	1.503	0	0	➖
upgradeable-contracts/set-code-hash-migration	1.503	1.503	0	0	➖
upgradeable-contracts/set-code-hash-migration/migration	1.67	1.67	0	0	➖
upgradeable-contracts/set-code-hash-migration/updated-incrementer	1.701	1.701	0	0	➖
upgradeable-contracts/set-code-hash/updated-incrementer	1.463	1.463	0	0	➖
wildcard-selector	2.79	2.79	0	0	➖

Link to the run | Last update: Thu Jun 19 01:16:22 CEST 2025