Jsclients code added , not adjusted

JsClients/ERC20/.env

@@ -0,0 +1,39 @@
+CHAIN_NAME=casper-test
+NODE_ADDRESS=http://144.76.97.151:7777/rpc
+EVENT_STREAM_ADDRESS=http://144.76.97.151:7777/events/main
+WASM_PATH=./wasm/erc20-token.wasm
+MASTER_KEY_PAIR_PATH=keys/
+RECEIVER_ACCOUNT_ONE=017e82abcc9539a01cfd9d63ae8c9c8b3a752a6f75ba1ab148714eea03e9be69a7
+
+CONTRACT_NAME=erc20
+TOKEN_NAME=ERC20
+TOKEN_SYMBOL=erc
+DECIMALS=18
+TOTAL_SUPPLY=1000
+
+INSTALL_PAYMENT_AMOUNT=200000000000
+
+MINT_PAYMENT_AMOUNT=5000000000
+MINT_AMOUNT=50
+
+BURN_PAYMENT_AMOUNT=5000000000
+BURN_AMOUNT=10
+
+APPROVE_PAYMENT_AMOUNT=5000000000
+APPROVE_AMOUNT=50
+
+TRANSFER_PAYMENT_AMOUNT=5000000000
+TRANSFER_AMOUNT=5
+
+TRANSFER_FROM_PAYMENT_AMOUNT=5000000000
+TRANSFER_FROM_AMOUNT=5
+
+# balanceof
+
+# transfer
+
+# transferfrom
+
+# approve
+
+# mint

JsClients/ERC20/src/constants.ts

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+export enum ERC20Events {
+  MintOne = "erc20_mint_one",
+  TransferToken = "erc20_transfer_token",
+  BurnOne = "erc20_burn_one",
+  MetadataUpdate = 'erc20_metadata_update',
+  Approve = 'approve',
+  Transfer = 'transfer',
+  TransferFrom = 'transfer_from',
+  Mint = 'mint',
+  Burn = 'burn',
+  Permit = 'permit',
+}