seth: add Optimistic Ethereum and Arbitrum Support (#781)

* [feat] add optimism

* fix spelling error

* [added] optimistic ethereum kovan support

* remove unnecessary echo

* [added] arbitrum mainnet support

Author: rajivpo

src/seth/README.md

@@ -560,7 +560,7 @@ Print the symbolic name of the current blockchain by checking the
 genesis block hash.
 
 Outputs one of `ethlive`, `etclive`, `kovan`, `ropsten`, `goerli`, `morden`,
-`rinkeby`, or `unknown`.
+`rinkeby`, `optimism-mainnet`, `optimism-kovan`, `arbitrum-mainnet`, `bsc`, `bsctest`, `kotti`, or `unknown`.
 
 ### `seth chain-id`
 

src/seth/libexec/seth/seth

@@ -214,6 +214,18 @@ if [[ $SETH_CHAIN ]]; then
         ~/{.local/share,Library/Application\ Support}/io.parity.ethereum/keys/"$SETH_CHAIN"/
       )
       ;;
+    optimism-mainnet)
+      eth_rpc_url=https://optimism-mainnet.infura.io/$INFURA_KEY
+      export ETHERSCAN_API_URL=https://api-optimistic.etherscan.io/api
+      ;;
+    optimism-kovan)
+      eth_rpc_url=https://optimism-kovan.infura.io/$INFURA_KEY
+      export ETHERSCAN_API_URL=https://api-kovan-optimistic.etherscan.io/api
+      ;;
+    arbitrum-mainnet)
+      eth_rpc_url=https://arbitrum-mainnet.infura.io/$INFURA_KEY
+      export ETHERSCAN_API_URL=https://api.arbiscan.io/api
+      ;;
     bsctest)
       eth_rpc_url=https://data-seed-prebsc-2-s1.binance.org:8545/
       export ETHERSCAN_API_URL=https://api-testnet.bscscan.com/api

src/seth/libexec/seth/seth-chain

@@ -15,6 +15,12 @@ case $genesis in
     echo kovan;;
   0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d)
     echo ropsten;;
+  0x39e1b9259598b65c8c71d1ea153de17e89222e64e8b271213dfb92c231f7fb88)
+    echo optimism-mainnet;;
+  0x2510549c5c30f15472b55dbae139122e2e593f824217eefc7a53f78698ac5c1e)
+    echo optimism-kovan;;
+  0x7ee576b35482195fc49205cec9af72ce14f003b9ae69f6ba0faef4514be8b442)
+    echo arbitrum-mainnet;;
   0x0cd786a2425d16f152c658316c423e6ce1181e15c3295826d7c9904cba9ce303)
     echo morden;;
   0x6341fd3daf94b748c72ced5a5b26028f2474f5f00d824504e4fa37a75767e177)

src/seth/libexec/seth/seth-etherscan-source

@@ -29,14 +29,23 @@ case "$chain" in
   ropsten|kovan|rinkeby|goerli)
     URL="${ETHERSCAN_API_URL:-https://api-$chain.etherscan.io}"
     ;;
+  optimism-mainnet)
+    URL="${ETHERSCAN_API_URL:-https://api-optimistic.etherscan.io}"
+    ;;
+  optimism-kovan)
+    URL="${ETHERSCAN_API_URL:-https://api-kovan-optimistic.etherscan.io/}"
+    ;;
+  arbitrum-mainnet)
+    URL="${ETHERSCAN_API_URL:-https://api.arbiscan.io/api}"
+    ;;
   bsctest)
     URL="${ETHERSCAN_API_URL:-https://api-testnet.bscscan.com}"
     ;;
   bsc)
     URL="${ETHERSCAN_API_URL:-https://api.bscscan.com}"
     ;;
   *)
-    echo >&2 "Source fetching only works on mainnet, ropsten, kovan, rinkeby, and goerli."
+    echo >&2 "Source fetching only works on mainnet, ropsten, kovan, rinkeby, goerli, optimism-mainnet, optimism-kovan, and arbitrum-mainnet."
     exit 1
 esac