Who ruled Spain that sponsored prince voyage for Portugal?

There is a historical inaccuracy in your question. The rulers of Spain did not sponsor Prince Henry's voyages for Portugal. Prince Henry, known as Prince Henry the Navigator, was a Portuguese royal and an important figure in the early era of European exploration. He was the third son of King John I of Portugal and Philippa of Lancaster. It was under Prince Henry's patronage and encouragement that Portuguese explorers embarked on numerous journeys of discovery along the African coast during the 15th century, leading to the discovery of new territories and the establishment of trade routes. Therefore, there was no Spanish ruler involved in sponsoring Prince Henry's voyages for Portugal.