Couple of codes released from the Japanese Live Event:
BS3265PKCVXT - 100 Jades + 50k credits:
https://hsr.hoyoverse.com/gift?code=BS3265PKCVXT
HELLOAMPHOREUS - 5k Credits + 2 High-Text Protective Gear
https://hsr.hoyoverse.com/gift?code=HELLOAMPHOREUS
RTKJPM6JVCFF - 100 Jades + 5 EXP books
https://hsr.hoyoverse.com/gift?code=RTKJPM6JVCFF
EAJJPMN3DDE3 - 100 Jades + 5 Relic EXP
https://hsr.hoyoverse.com/gift?code=EAJJPMN3DDE3
Have fun and good luck with your pulls in the new patch :)
EDIT - Found some extras:
ABC1CDEF0123 - 50 Jades + 10000 Credits
https://hsr.hoyoverse.com/gift?code=ABC1CDEF0123
HSRAWAITSYOU - 60 Jades + 2 EXP + 3 Lightcone EXP + 5k Credits
https://hsr.hoyoverse.com/gift?code=HSRAWAITSYOU
THEHERTAGIFT - 2 Shield + 5k Credits
https://hsr.hoyoverse.com/gift?code=THEHERTAGIFT
IFYOUAREREADINGTHIS - 60 Jades + 1 Fuel
https://hsr.hoyoverse.com/gift?code=IFYOUAREREADINGTHIS
Damn, hoyo feeling extra generous eh.