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context.go
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context.go
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package context
import (
"bytes"
"fmt"
"io"
"os"
"path/filepath"
"github.com/cosmos/cosmos-sdk/client"
"github.com/cosmos/cosmos-sdk/codec"
"github.com/cosmos/cosmos-sdk/x/auth"
"github.com/spf13/viper"
"github.com/tendermint/tendermint/libs/cli"
"github.com/tendermint/tendermint/libs/log"
tmlite "github.com/tendermint/tendermint/lite"
tmliteProxy "github.com/tendermint/tendermint/lite/proxy"
rpcclient "github.com/tendermint/tendermint/rpc/client"
"github.com/cosmos/cosmos-sdk/client/keys"
cskeys "github.com/cosmos/cosmos-sdk/crypto/keys"
"github.com/cosmos/cosmos-sdk/types"
)
var (
verifier tmlite.Verifier
)
// CLIContext implements a typical CLI context created in SDK modules for
// transaction handling and queries.
type CLIContext struct {
Codec *codec.Codec
AccDecoder auth.AccountDecoder
Client rpcclient.Client
Output io.Writer
OutputFormat string
Height int64
NodeURI string
From string
AccountStore string
TrustNode bool
UseLedger bool
Async bool
JSON bool
PrintResponse bool
Verifier tmlite.Verifier
Simulate bool
GenerateOnly bool
fromAddress types.AccAddress
fromName string
Indent bool
}
// NewCLIContext returns a new initialized CLIContext with parameters from the
// command line using Viper.
func NewCLIContext() CLIContext {
var rpc rpcclient.Client
nodeURI := viper.GetString(client.FlagNode)
if nodeURI != "" {
rpc = rpcclient.NewHTTP(nodeURI, "/websocket")
}
from := viper.GetString(client.FlagFrom)
fromAddress, fromName := fromFields(from)
// We need to use a single verifier for all contexts
if verifier == nil {
verifier = createVerifier()
}
return CLIContext{
Client: rpc,
Output: os.Stdout,
NodeURI: nodeURI,
AccountStore: auth.StoreKey,
From: viper.GetString(client.FlagFrom),
OutputFormat: viper.GetString(cli.OutputFlag),
Height: viper.GetInt64(client.FlagHeight),
TrustNode: viper.GetBool(client.FlagTrustNode),
UseLedger: viper.GetBool(client.FlagUseLedger),
Async: viper.GetBool(client.FlagAsync),
JSON: viper.GetBool(client.FlagJson),
PrintResponse: viper.GetBool(client.FlagPrintResponse),
Verifier: verifier,
Simulate: viper.GetBool(client.FlagDryRun),
GenerateOnly: viper.GetBool(client.FlagGenerateOnly),
fromAddress: fromAddress,
fromName: fromName,
Indent: viper.GetBool(client.FlagIndentResponse),
}
}
func createVerifier() tmlite.Verifier {
trustNodeDefined := viper.IsSet(client.FlagTrustNode)
if !trustNodeDefined {
return nil
}
trustNode := viper.GetBool(client.FlagTrustNode)
if trustNode {
return nil
}
chainID := viper.GetString(client.FlagChainID)
home := viper.GetString(cli.HomeFlag)
nodeURI := viper.GetString(client.FlagNode)
var errMsg bytes.Buffer
if chainID == "" {
errMsg.WriteString("--chain-id ")
}
if home == "" {
errMsg.WriteString("--home ")
}
if nodeURI == "" {
errMsg.WriteString("--node ")
}
if errMsg.Len() != 0 {
fmt.Printf("Must specify these options: %s when --trust-node is false\n", errMsg.String())
os.Exit(1)
}
node := rpcclient.NewHTTP(nodeURI, "/websocket")
cacheSize := 10 // TODO: determine appropriate cache size
verifier, err := tmliteProxy.NewVerifier(
chainID, filepath.Join(home, ".gaialite"),
node, log.NewNopLogger(), cacheSize,
)
if err != nil {
fmt.Printf("Create verifier failed: %s\n", err.Error())
fmt.Printf("Please check network connection and verify the address of the node to connect to\n")
os.Exit(1)
}
return verifier
}
func fromFields(from string) (fromAddr types.AccAddress, fromName string) {
if from == "" {
return nil, ""
}
keybase, err := keys.GetKeyBase()
if err != nil {
fmt.Println("no keybase found")
os.Exit(1)
}
var info cskeys.Info
if addr, err := types.AccAddressFromBech32(from); err == nil {
info, err = keybase.GetByAddress(addr)
if err != nil {
fmt.Printf("could not find key %s\n", from)
os.Exit(1)
}
} else {
info, err = keybase.Get(from)
if err != nil {
fmt.Printf("could not find key %s\n", from)
os.Exit(1)
}
}
fromAddr = info.GetAddress()
fromName = info.GetName()
return
}
// WithCodec returns a copy of the context with an updated codec.
func (ctx CLIContext) WithCodec(cdc *codec.Codec) CLIContext {
ctx.Codec = cdc
return ctx
}
// GetAccountDecoder gets the account decoder for auth.DefaultAccount.
func GetAccountDecoder(cdc *codec.Codec) auth.AccountDecoder {
return func(accBytes []byte) (acct auth.Account, err error) {
err = cdc.UnmarshalBinaryBare(accBytes, &acct)
if err != nil {
panic(err)
}
return acct, err
}
}
// WithAccountDecoder returns a copy of the context with an updated account
// decoder.
func (ctx CLIContext) WithAccountDecoder(cdc *codec.Codec) CLIContext {
ctx.AccDecoder = GetAccountDecoder(cdc)
return ctx
}
// WithOutput returns a copy of the context with an updated output writer (e.g. stdout).
func (ctx CLIContext) WithOutput(w io.Writer) CLIContext {
ctx.Output = w
return ctx
}
// WithAccountStore returns a copy of the context with an updated AccountStore.
func (ctx CLIContext) WithAccountStore(accountStore string) CLIContext {
ctx.AccountStore = accountStore
return ctx
}
// WithFrom returns a copy of the context with an updated from address or name.
func (ctx CLIContext) WithFrom(from string) CLIContext {
ctx.From = from
return ctx
}
// WithTrustNode returns a copy of the context with an updated TrustNode flag.
func (ctx CLIContext) WithTrustNode(trustNode bool) CLIContext {
ctx.TrustNode = trustNode
return ctx
}
// WithNodeURI returns a copy of the context with an updated node URI.
func (ctx CLIContext) WithNodeURI(nodeURI string) CLIContext {
ctx.NodeURI = nodeURI
ctx.Client = rpcclient.NewHTTP(nodeURI, "/websocket")
return ctx
}
// WithClient returns a copy of the context with an updated RPC client
// instance.
func (ctx CLIContext) WithClient(client rpcclient.Client) CLIContext {
ctx.Client = client
return ctx
}
// WithUseLedger returns a copy of the context with an updated UseLedger flag.
func (ctx CLIContext) WithUseLedger(useLedger bool) CLIContext {
ctx.UseLedger = useLedger
return ctx
}
// WithVerifier - return a copy of the context with an updated Verifier
func (ctx CLIContext) WithVerifier(verifier tmlite.Verifier) CLIContext {
ctx.Verifier = verifier
return ctx
}
// WithGenerateOnly returns a copy of the context with updated GenerateOnly value
func (ctx CLIContext) WithGenerateOnly(generateOnly bool) CLIContext {
ctx.GenerateOnly = generateOnly
return ctx
}
// WithSimulation returns a copy of the context with updated Simulate value
func (ctx CLIContext) WithSimulation(simulate bool) CLIContext {
ctx.Simulate = simulate
return ctx
}
// PrintOutput prints output while respecting output and indent flags
// NOTE: pass in marshalled structs that have been unmarshaled
// because this function will panic on marshaling errors
func (ctx CLIContext) PrintOutput(toPrint fmt.Stringer) (err error) {
var out []byte
switch ctx.OutputFormat {
case "text":
out = []byte(toPrint.String())
case "json":
if ctx.Indent {
out, err = ctx.Codec.MarshalJSONIndent(toPrint, "", " ")
} else {
out, err = ctx.Codec.MarshalJSON(toPrint)
}
}
if err != nil {
return
}
fmt.Println(string(out))
return
}