add_POLYGON_USDT+USDC+DAI (#12133)

* add_POLYGON_USDT+USDC+DAI

USDT:
https://polygonscan.com/token/0xc2132d05d31c914a87c6611c10748aeb04b58e8f

USDC:
https://polygonscan.com/token/0x2791bca1f2de4661ed88a30c99a7a9449aa84174

DAI: https://polygonscan.com/token/0x8f3cf7ad23cd3cadbd9735aff958023239c6a063

* update info.json

changed type to POLYGON-ERC20

* Fixes (sanity and consistency, auto), history

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

blockchains/polygon/allowlist.json

@@ -1,3 +1,6 @@
 [
-    "0xAdA58DF0F643D959C2A47c9D4d4c1a4deFe3F11C"
+    "0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174",
+    "0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063",
+    "0xAdA58DF0F643D959C2A47c9D4d4c1a4deFe3F11C",
+    "0xc2132D05D31c914a87C6611C10748AEb04B58e8F"
 ]

blockchains/polygon/assets/0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174/info.json

@@ -0,0 +1,33 @@
+{
+    "name": "USD Coin (PoS)",
+    "website": "https://centre.io/usdc",
+    "description": "USDC is a fully collateralized US dollar stablecoin, an Ethereum powered coin and is the brainchild of CENTRE, an open source project bootstrapped by contributions from Circle and Coinbase.",
+    "explorer": "https://polygonscan.com/token/0x2791bca1f2de4661ed88a30c99a7a9449aa84174",
+    "type": "POLYGON-ERC20",
+    "symbol": "USDC",
+    "decimals": 6,
+    "status": "active",
+    "id": "0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174",
+    "links": [
+        {
+            "name": "github",
+            "url": "https://github.com/centrehq"
+        },
+        {
+            "name": "medium",
+            "url": "https://medium.com/centre-blog"
+        },
+        {
+            "name": "whitepaper",
+            "url": "https://centre.io/pdfs/centre-whitepaper.pdf"
+        },
+        {
+            "name": "coinmarketcap",
+            "url": "https://coinmarketcap.com/currencies/usd-coin/"
+        },
+        {
+            "name": "coingecko",
+            "url": "https://coingecko.com/en/coins/usd-coin/"
+        }
+    ]
+}

blockchains/polygon/assets/0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063/info.json

@@ -0,0 +1,38 @@
+{
+    "name": "(PoS) Dai Stablecoin",
+    "website": "http://makerdao.com",
+    "description": "Dai is a stable cryptocurrency supported by Maker (MKR). To ensure price stability, Dai minimizes the price volatility against the US dollar, through an incentive structure for its participants.",
+    "explorer": "https://polygonscan.com/token/0x8f3cf7ad23cd3cadbd9735aff958023239c6a063",
+    "research": "https://research.binance.com/en/projects/dai",
+    "type": "POLYGON-ERC20",
+    "symbol": "DAI",
+    "decimals": 18,
+    "status": "active",
+    "id": "0x8f3Cf7ad23Cd3CaDbD9735AFf958023239c6A063",
+    "links": [
+        {
+            "name": "twitter",
+            "url": "https://twitter.com/MakerDAO"
+        },
+        {
+            "name": "reddit",
+            "url": "https://reddit.com/r/MakerDAO/"
+        },
+        {
+            "name": "blog",
+            "url": "https://blog.makerdao.com/"
+        },
+        {
+            "name": "whitepaper",
+            "url": "https://makerdao.com/whitepaper/"
+        },
+        {
+            "name": "coinmarketcap",
+            "url": "https://coinmarketcap.com/currencies/multi-collateral-dai/"
+        },
+        {
+            "name": "coingecko",
+            "url": "https://coingecko.com/en/coins/dai/"
+        }
+    ]
+}

blockchains/polygon/assets/0xc2132D05D31c914a87C6611C10748AEb04B58e8F/info.json

@@ -0,0 +1,25 @@
+{
+    "name": "(PoS) Tether USD",
+    "website": "https://tether.to",
+    "description": "Tether (USDT) is a cryptocurrency with a value meant to mirror the value of the U.S. dollar.",
+    "explorer": "https://polygonscan.com/token/0xc2132d05d31c914a87c6611c10748aeb04b58e8f",
+    "type": "POLYGON-ERC20",
+    "symbol": "USDT",
+    "decimals": 6,
+    "status": "active",
+    "id": "0xc2132D05D31c914a87C6611C10748AEb04B58e8F",
+    "links": [
+        {
+            "name": "facebook",
+            "url": "https://facebook.com/tether.to/"
+        },
+        {
+            "name": "twitter",
+            "url": "https://twitter.com/Tether_to/"
+        },
+        {
+            "name": "coinmarketcap",
+            "url": "https://coinmarketcap.com/ru/currencies/tether/"
+        }
+    ]
+}