Merge pull request #141 from oasisprotocol/kostko/feature/net-set-cha…

…in-ctx

feat(cmd/network): Add network set-chain-context subcommand

cmd/network/network.go

@@ -55,6 +55,7 @@ func init() {
 	Cmd.AddCommand(governance.Cmd)
 	Cmd.AddCommand(listCmd)
 	Cmd.AddCommand(rmCmd)
+	Cmd.AddCommand(setChainContextCmd)
 	Cmd.AddCommand(setDefaultCmd)
 	Cmd.AddCommand(setRPCCmd)
 	Cmd.AddCommand(showCmd)

cmd/network/set_chain_context.go

@@ -0,0 +1,30 @@
+package network
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+
+	cliConfig "github.com/oasisprotocol/cli/config"
+)
+
+var setChainContextCmd = &cobra.Command{
+	Use:   "set-chain-context <name> <chain-context>",
+	Short: "Sets the chain context of the given network",
+	Args:  cobra.ExactArgs(2),
+	Run: func(cmd *cobra.Command, args []string) {
+		cfg := cliConfig.Global()
+		name, chainContext := args[0], args[1]
+
+		net := cfg.Networks.All[name]
+		if net == nil {
+			cobra.CheckErr(fmt.Errorf("network '%s' does not exist", name))
+			return // To make staticcheck happy as it doesn't know CheckErr exits.
+		}
+
+		net.ChainContext = chainContext
+
+		err := cfg.Save()
+		cobra.CheckErr(err)
+	},
+}

docs/network.md

@@ -75,6 +75,21 @@ all dependant ParaTimes.
 
 ![code shell](../examples/network/01-remove.in)
 
+## Set Network Chain Context {#set-chain-context}
+
+To change the chain context of a network, use
+`network set-chain-context <name> <chain-context>`.
+
+:::caution
+
+Chain contexts represent a root of trust in the network, so before changing them
+for production networks make sure you have verified them against a trusted
+source like the official Oasis documentation.
+
+:::
+
+![code shell](../examples/network/05-set-chain-context.in)
+
 ## Set Default Network {#set-default}
 
 To change the default network for future Oasis CLI operations, use

examples/network-governance/list.out

@@ -6,3 +6,4 @@ ID	KIND            	SUBMITTER                                     	CREATED AT	CL
 5 	upgrade         	oasis1qrs2dl6nz6fcxxr3tq37laxlz6hxk6kuscnr6rxj	14869     	14881    	passed	
 6 	cancel upgrade 5	oasis1qrs2dl6nz6fcxxr3tq37laxlz6hxk6kuscnr6rxj	14895     	14907    	passed	
 7 	upgrade         	oasis1qrs2dl6nz6fcxxr3tq37laxlz6hxk6kuscnr6rxj	14982     	14994    	passed	
+8 	upgrade         	oasis1qpwaggvmhwq5uk40clase3knt655nn2tdy39nz2f	29493     	29505    	passed	

examples/network/05-set-chain-context.in

@@ -0,0 +1 @@
+oasis network set-chain-context mainnet_local b11b369e0da5bb230b220127f5e7b242d385ef8c6f54906243f30af63c815535