Preciso inserir prazo de expiração renovável para meu EA

Specification

Sou proprietário e comercializo um Robô desenvolvido em mql5. Preciso adicionar a possibilidade de o usuário ter uma assinatura mensal ou anual. Até então eu só comercializo a versão perpétua, pois entrego o arquivo desbloqueado para o usuário, o que não é nem um pouco conveniente, óbvio. Então preciso de uma solução no código que faça com que o robô expire em 30 dias, para assinaturas mensais e 365 dias para assinaturas anuais caso não sejam renovadas. Deverá também haver a possibilidade de liberação de licença vitalícia.

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Project information

Budget
30 - 50 USD