Solidity 0.6.x
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This document discusses the new features and changes in Solidity version 0.6.x. It provides links to examples of the new features such as virtual and override keywords for inheritance, try/catch blocks, address payable casting, array slicing, and improved NatSpec documentation generation. The examples are intended to help developers learn how to update their smart contracts for the new Solidity version.
Solidity 0.6.x
- 1. Algumas Novidades da Versão 0.6.x Jeff Prestes - 2020-03-30
- 2. Agradecimentos e Creditos Apresentação baseada no material do prof. Gerard Persoon da Universidade de Ciências Aplicadas de Haia Agradeço do prof. Gerard por gentilmente compartilhar o material. Mais detalhes dos fontes originais de exemplo em: https://github.com/web3examples/ethereum/blob/master/solidity_examples/ Meus exemplos melhorados estão em: https://github.com/jeffprestes/ethereum-examples-hague-univ/solidity_examples Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes
- 3. Tipos Globais https://github.com/web3examples/ethereum/blob/master/solidity_examples/sol6_globaltypes.sol Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes
- 4. Funções Fallback & Receive https://github.com/jeffprestes/ethereum-examples-hague-univ/blob/master/solidity_examples/sol6_fall backreceive.sol Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes
- 5. Nova forma de excluir item de array https://github.com/web3examples/ethereum/blob/master/solidity_examples/sol6_mapping.sol Usar ListParticipant.pop() ao invés de ListParticipant.length-- Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes
- 6. push Não retorna mais o índice do novo elemento. Aliás, push(novoValor) retorna nada. https://solidity.readthedocs.io/en/v0.6.0/types.html#array-members Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes
- 7. ABIEncoderV2 Não é mais considerado experimental, só mantiveram a sintaxe por retrocompatibilidade: https://solidity.readthedocs.io/en/v0.6.4/layout-of-source-files.html#abiencoderv2 Não usar com o otimizador: https://solidity.readthedocs.io/en/v0.6.4/060-breaking-changes.html#yul-optimizer Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes
- 8. Novas features em herança: virtual e override https://github.com/web3examples/ethereum/blob/master/solidity_examples/sol6_override.sol Este artigo explica em detalhes: https://forum.openzeppelin.com/t/how-we-plan-to-adopt-solidity-0-6-virtual-functions/2063 Aqui outros exemplos: https://solidity.readthedocs.io/en/v0.6.0/contracts.html#inheritance Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes
- 9. Multiplas sobrecargas de método https://github.com/web3examples/ethereum/blob/master/solidity_examples/sol6_overridemultiple.sol Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes
- 10. Métodos Abstratos https://github.com/web3examples/ethereum/blob/master/solidity_examples/sol6_abstract.sol Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes
- 11. Melhoria no compilador: alerta de "shadowing" https://github.com/web3examples/ethereum/blob/master/solidity_examples/sol6_shadowing.sol Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes
- 12. Polêmico: try catch https://github.com/web3examples/ethereum/blob/master/solidity_examples/sol6_trycatch.sol Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes
- 13. Casting de address para address payable https://github.com/jeffprestes/ethereum-examples-hague-univ/blob/master/solidity_examples/sol6_addr payablecasting.sol Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes
- 14. Fatias de um array ou Array Slices https://github.com/web3examples/ethereum/blob/master/solidity_examples/sol6_slice.sol Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes
- 15. Natspec - Pequena melhoria na doc gerada no retorno https://github.com/jeffprestes/ethereum-examples-hague-univ/blob/master/solidity_examples/sol6_nats pec.sol Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes
- 16. Mudança de como obter Endereços de funções externas https://github.com/jeffprestes/ethereum-examples-hague-univ/blob/master/solidity_examples/sol6_addr essexternal.sol Jeff Prestes https://linkedin.com/in/jeffprestes https://github.com/jeffprestes
- 17. That's all folks! https://linkedin.com/in/jeffprestes Mande PR ou dê uma estrela no repo dos exemplos https://github.com/jeffprestes E adicione-me no seu Linkedin