95 lines
2.7 KiB
Go
95 lines
2.7 KiB
Go
package wormconn
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import (
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"context"
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"encoding/hex"
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"fmt"
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"sync"
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cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types"
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sdktx "github.com/cosmos/cosmos-sdk/types/tx"
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"github.com/btcsuite/btcutil/bech32"
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wormchain "github.com/wormhole-foundation/wormchain/app"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials/insecure"
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)
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// ClienConn represents a connection to a wormhole-chain endpoint, encapsulating
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// interactions with the chain.
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//
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// Once a connection is established, users must call ClientConn.Close to
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// terminate the connection and free up resources.
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//
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// For semantics around ctx use and closing/ending streaming RPCs, please refer
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// to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
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type ClientConn struct {
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c *grpc.ClientConn
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encCfg EncodingConfig
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privateKey cryptotypes.PrivKey
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senderAddress string
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mutex sync.Mutex // Protects the account / sequence number
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}
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// NewConn creates a new connection to the wormhole-chain instance at `target`.
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func NewConn(ctx context.Context, target string, privateKey cryptotypes.PrivKey) (*ClientConn, error) {
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c, err := grpc.DialContext(
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ctx,
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target,
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grpc.WithTransportCredentials(insecure.NewCredentials()),
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)
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if err != nil {
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return nil, err
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}
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encCfg := MakeEncodingConfig(wormchain.ModuleBasics)
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senderAddress, err := generateSenderAddress(privateKey)
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if err != nil {
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return nil, err
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}
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return &ClientConn{c: c, encCfg: encCfg, privateKey: privateKey, senderAddress: senderAddress}, nil
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}
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func (c *ClientConn) SenderAddress() string {
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return c.senderAddress
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}
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// Close terminates the connection and frees up resources.
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func (c *ClientConn) Close() {
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c.mutex.Lock()
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defer c.mutex.Unlock()
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c.c.Close()
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}
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func (c *ClientConn) BroadcastTxResponseToString(txResp *sdktx.BroadcastTxResponse) (string, error) {
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out, err := c.encCfg.Marshaler.MarshalJSON(txResp)
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if err != nil {
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return "", err
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}
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return string(out), nil
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}
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// generateSenderAddress creates the sender address from the private key. It is based on https://pkg.go.dev/github.com/btcsuite/btcutil/bech32#Encode
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func generateSenderAddress(privateKey cryptotypes.PrivKey) (string, error) {
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data, err := hex.DecodeString(privateKey.PubKey().Address().String())
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if err != nil {
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return "", fmt.Errorf("failed to generate public key, failed to hex decode string: %w", err)
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}
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conv, err := bech32.ConvertBits(data, 8, 5, true)
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if err != nil {
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return "", fmt.Errorf("failed to generate public key, failed to convert bits: %w", err)
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}
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encoded, err := bech32.Encode("wormhole", conv)
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if err != nil {
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return "", fmt.Errorf("failed to generate public key, bech32 encode failed: %w", err)
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}
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return encoded, nil
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}
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