add BEP20 BETH (#5261)

* add BEP20 BETH

* Fixes (sanity and consistency, auto)

Co-authored-by: zachzwei <zachzwei@users.noreply.github.com>

blockchains/smartchain/allowlist.json

@@ -27,6 +27,7 @@
     "0x2090c8295769791ab7A3CF1CC6e0AA19F35e441A",
     "0x2170Ed0880ac9A755fd29B2688956BD959F933F8",
     "0x233d91A0713155003fc4DcE0AFa871b508B3B715",
+    "0x250632378E573c6Be1AC2f97Fcdf00515d0Aa91B",
     "0x264Bc4Ea2F45cF6331AD6C3aC8d7257Cf487FcbC",
     "0x2Bc4eb013DDee29D37920938B96d353171289B7C",
     "0x2d3bfaDF9BC94E3Ab796029A030e863F1898aA06",

blockchains/smartchain/assets/0x250632378E573c6Be1AC2f97Fcdf00515d0Aa91B/info.json

@@ -0,0 +1,7 @@
+{
+    "name": "Binance Beacon ETH",
+    "website": "https://www.binance.com/en/eth2",
+    "short_description": "BETH is a tokenized asset representing staked ETH at Binance Staking on a 1:1 basis.",
+    "explorer": "https://bscscan.com/token/0x250632378e573c6be1ac2f97fcdf00515d0aa91b",
+    "research": ""
+}