How exactly keys are tweaked? Because every time I am getting wrong results, one correct example could be helpful. For example I have something like this:
internal_key=0279BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798
tweak*G=0379A78517D39A73C6268BA907022D2B1144412988BD6BD059C0FB032FBBCC66C8
tweaked_key=02DA4710964F7852695DE2DA025290E24AF6D8C281DE5A0B902B7135FD9FD74D21
tweaked_key=internal_key+tweak*G
SHA-256("TapTweak")=e80fe1639c9ca050e3af1b39c143c63e429cbceb15d940fbb5c5a1f4af57c5e9
bytes(internal_key)=79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798
SHA-256(SHA-256("TapTweak")||SHA-256("TapTweak")||bytes(internal_key))=SHA-256(e80fe1639c9ca050e3af1b39c143c63e429cbceb15d940fbb5c5a1f4af57c5e9e80fe1639c9ca050e3af1b39c143c63e429cbceb15d940fbb5c5a1f4af57c5e979BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798)=3cf5216d476a5e637bf0da674e50ddf55c403270dd36494dfcca438132fa30e7
3cf5216d476a5e637bf0da674e50ddf55c403270dd36494dfcca438132fa30e7*G=02CC2A7558AE6D55AA13FDD0A7F1E77A5C212970EC5A571652E35D7B6A3F7A415D
02CC2A7558AE6D55AA13FDD0A7F1E77A5C212970EC5A571652E35D7B6A3F7A415D!=02DA4710964F7852695DE2DA025290E24AF6D8C281DE5A0B902B7135FD9FD74D21 (failed)