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// (c) 2019-2020, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package evm
import (
"fmt"
"time"
"github.com/ava-labs/avalanchego/api"
"github.com/ava-labs/avalanchego/ids"
"github.com/ava-labs/avalanchego/utils/formatting"
cjson "github.com/ava-labs/avalanchego/utils/json"
"github.com/ava-labs/avalanchego/utils/rpc"
)
// Client ...
type Client struct {
requester rpc.EndpointRequester
}
// NewClient returns a Client for interacting with EVM [chain]
func NewClient(uri, chain string, requestTimeout time.Duration) *Client {
return &Client{
requester: rpc.NewEndpointRequester(uri, fmt.Sprintf("/ext/bc/%s/avax", chain), "avax", requestTimeout),
}
}
// NewCChainClient returns a Client for interacting with the C Chain
func NewCChainClient(uri string, requestTimeout time.Duration) *Client {
return NewClient(uri, "C", requestTimeout)
}
// IssueTx issues a transaction to a node and returns the TxID
func (c *Client) IssueTx(txBytes []byte) (ids.ID, error) {
res := &api.JSONTxID{}
txStr, err := formatting.Encode(formatting.Hex, txBytes)
if err != nil {
return res.TxID, fmt.Errorf("problem hex encoding bytes: %w", err)
}
err = c.requester.SendRequest("issueTx", &api.FormattedTx{
Tx: txStr,
Encoding: formatting.Hex,
}, res)
return res.TxID, err
}
// GetTxStatus returns the status of [txID]
// func (c *Client) GetTxStatus(txID ids.ID) (choices.Status, error) {
// res := &GetTxStatusReply{}
// err := c.requester.SendRequest("getTxStatus", &api.JSONTxID{
// TxID: txID,
// }, res)
// return res.Status, err
// }
// GetTx returns the byte representation of [txID]
func (c *Client) GetTx(txID ids.ID) ([]byte, error) {
res := &api.FormattedTx{}
err := c.requester.SendRequest("getTx", &api.GetTxArgs{
TxID: txID,
Encoding: formatting.Hex,
}, res)
if err != nil {
return nil, err
}
return formatting.Decode(formatting.Hex, res.Tx)
}
// GetUTXOs returns the byte representation of the UTXOs controlled by [addrs]
func (c *Client) GetUTXOs(addrs []string, limit uint32, startAddress, startUTXOID string) ([][]byte, api.Index, error) {
res := &api.GetUTXOsReply{}
err := c.requester.SendRequest("getUTXOs", &api.GetUTXOsArgs{
Addresses: addrs,
Limit: cjson.Uint32(limit),
StartIndex: api.Index{
Address: startAddress,
UTXO: startUTXOID,
},
Encoding: formatting.Hex,
}, res)
if err != nil {
return nil, api.Index{}, err
}
utxos := make([][]byte, len(res.UTXOs))
for i, utxo := range res.UTXOs {
b, err := formatting.Decode(formatting.Hex, utxo)
if err != nil {
return nil, api.Index{}, err
}
utxos[i] = b
}
return utxos, res.EndIndex, nil
}
// CreateAddress creates a new address controlled by [user]
func (c *Client) CreateAddress(user api.UserPass) (string, error) {
res := &api.JSONAddress{}
err := c.requester.SendRequest("createAddress", &user, res)
return res.Address, err
}
// ListAddresses returns all addresses on this chain controlled by [user]
func (c *Client) ListAddresses(user api.UserPass) ([]string, error) {
res := &api.JSONAddresses{}
err := c.requester.SendRequest("listAddresses", &user, res)
return res.Addresses, err
}
// ExportKey returns the private key corresponding to [addr] controlled by [user]
// in both Avalanche standard format and hex format
func (c *Client) ExportKey(user api.UserPass, addr string) (string, string, error) {
res := &ExportKeyReply{}
err := c.requester.SendRequest("exportKey", &ExportKeyArgs{
UserPass: user,
Address: addr,
}, res)
return res.PrivateKey, res.PrivateKeyHex, err
}
// ImportKey imports [privateKey] to [user]
func (c *Client) ImportKey(user api.UserPass, privateKey string) (string, error) {
res := &api.JSONAddress{}
err := c.requester.SendRequest("importKey", &ImportKeyArgs{
UserPass: user,
PrivateKey: privateKey,
}, res)
return res.Address, err
}
// Import sends an import transaction to import funds from [sourceChain] and
// returns the ID of the newly created transaction
func (c *Client) Import(user api.UserPass, to, sourceChain string) (ids.ID, error) {
res := &api.JSONTxID{}
err := c.requester.SendRequest("import", &ImportArgs{
UserPass: user,
To: to,
SourceChain: sourceChain,
}, res)
return res.TxID, err
}
// ExportAVAX sends AVAX from this chain to the address specified by [to].
// Returns the ID of the newly created atomic transaction
func (c *Client) ExportAVAX(
user api.UserPass,
amount uint64,
to string,
) (ids.ID, error) {
return c.Export(user, amount, to, "AVAX")
}
// Export sends an asset from this chain to the P/C-Chain.
// After this tx is accepted, the AVAX must be imported to the P/C-chain with an importTx.
// Returns the ID of the newly created atomic transaction
func (c *Client) Export(
user api.UserPass,
amount uint64,
to string,
assetID string,
) (ids.ID, error) {
res := &api.JSONTxID{}
err := c.requester.SendRequest("export", &ExportArgs{
ExportAVAXArgs: ExportAVAXArgs{
UserPass: user,
Amount: cjson.Uint64(amount),
To: to,
},
AssetID: assetID,
}, res)
return res.TxID, err
}
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