Rinse and drain the chickpeas then path them dry thoroughly with a clean kitchen towel. Pinch off and discard any loose skins that slip free — you don't need to get them all, but the more you remove, the silkier the truffles.
If your dates feel dry or firm, cover them with hot water and soak for 10 minutes, then drain well. Skip this if they're soft and sticky.
Add the chickpeas, dates, protein powder, cocoa powder, peanut butter, vanilla, and maple syrup to a food processor. Process for 2 to 3 full minutes, stopping to scrape down the sides as needed. Keep going past the crumbly stage. The mixture should come together into a smooth, thick dough that holds a fingerprint.
Scoop level tablespoons of dough and roll into balls. Set them on a parchment-lined baking sheet.
Melt the chocolate and coconut oil together in a heatproof bowl set over barely simmering water, stirring until glossy and smooth. Or microwave in 20-second bursts, stirring between each.
Drop one truffle at a time into the chocolate, lift out with a fork, and tap the fork on the rim of the bowl to shed the extra. Return to the parchment and sprinkle with flaky sea salt while the chocolate is still wet.
Chill for 15 minutes, or until the shells are firm.