/
path_payments.go
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/
path_payments.go
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/*
* Copyright (c) 2019 ChainFront LLC.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package xrp
import (
"context"
"fmt"
"github.com/hashicorp/vault/logical"
"github.com/hashicorp/vault/logical/framework"
"github.com/rubblelabs/ripple/data"
"math/big"
"strings"
)
// Register the callbacks for the paths exposed by these functions
func paymentsPaths(b *backend) []*framework.Path {
return []*framework.Path{
&framework.Path{
Pattern: "payments",
HelpSynopsis: "Make a payment on the Ripple network",
Fields: map[string]*framework.FieldSchema{
"source": &framework.FieldSchema{
Type: framework.TypeString,
Description: "Source account",
},
"destination": &framework.FieldSchema{
Type: framework.TypeString,
Description: "Destination account",
},
"paymentChannel": &framework.FieldSchema{
Type: framework.TypeString,
Description: "(Optional) Payment channel account",
},
"additionalSigners": &framework.FieldSchema{
Type: framework.TypeCommaStringSlice,
Description: "(Optional) Array of additional signers for this transaction",
},
"amount": &framework.FieldSchema{
Type: framework.TypeString,
Description: "Amount to send",
},
"assetCode": &framework.FieldSchema{
Type: framework.TypeString,
Description: "Code of asset to send (use 'native' for XRP)",
},
"assetIssuer": &framework.FieldSchema{
Type: framework.TypeString,
Description: "(Optional) If paying with a non-native asset, this is the issuer address",
},
"memo": &framework.FieldSchema{
Type: framework.TypeString,
Description: "(Optional) An optional memo to include with the payment transaction",
},
},
Callbacks: map[logical.Operation]framework.OperationFunc{
logical.CreateOperation: b.createPayment,
logical.UpdateOperation: b.createPayment,
},
},
}
}
// RIPPLE: Creates a signed transaction with a payment operation.
func (b *backend) createPayment(ctx context.Context, req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
// Validate we didn't get extra fields
err := validateFields(req, d)
if err != nil {
return nil, logical.CodedError(400, err.Error())
}
// Validate required fields are present
source := d.Get("source").(string)
if source == "" {
return errMissingField("source"), nil
}
destination := d.Get("destination").(string)
if destination == "" {
return errMissingField("destination"), nil
}
amountStr := d.Get("amount").(string)
if amountStr == "" {
return errMissingField("amount"), nil
}
amount := validNumber(amountStr)
assetCode := d.Get("assetCode").(string)
if assetCode == "" {
return errMissingField("assetCode"), nil
}
// Read optional fields
assetIssuer := d.Get("assetIssuer").(string)
if assetIssuer == "" && !strings.EqualFold(assetCode, "native") {
return errMissingField("assetIssuer"), nil
}
// Read the optional additionalSigners field
//var additionalSigners []string
//if additionalSignersRaw, ok := d.GetOk("additionalSigners"); ok {
// additionalSigners = additionalSignersRaw.([]string)
//}
// Read the optional memo field
//memo := d.Get("memo").(string)
// Retrieve the source account keypair from vault storage
sourceAccount, err := b.readVaultAccount(ctx, req, "accounts/"+source)
if err != nil {
return nil, err
}
if sourceAccount == nil {
return nil, logical.CodedError(400, "source account not found")
}
sourceAddress := sourceAccount.AccountId
// Retrieve the destination account keypair from vault storage
destinationAccount, err := b.readVaultAccount(ctx, req, "accounts/"+destination)
if err != nil {
return nil, err
}
if destinationAccount == nil {
return nil, logical.CodedError(400, "destination account not found")
}
destinationAddress := destinationAccount.AccountId
// Prepare the payment transaction
payment, err := createPaymentTransaction(sourceAddress, destinationAddress, amount.String(), assetCode, assetIssuer)
if err != nil {
return nil, err
}
// Sign the transaction
signedPayment, err := signPaymentTransaction(sourceAccount, payment)
if err != nil {
return nil, err
}
_, txRaw, err := data.Raw(signedPayment)
if err != nil {
return nil, err
}
return &logical.Response{
Data: map[string]interface{}{
"source_address": signedPayment.Account.String(),
"account_sequence": signedPayment.Sequence,
"fee": signedPayment.Fee.String(),
"transaction_hash": signedPayment.Hash.String(),
"signed_transaction": fmt.Sprintf("%X", txRaw),
},
}, nil
}
func (b *backend) validAccountConstraints(account *Account, amount *big.Int, toAddress string) (bool, error) {
txLimit := validNumber(account.TxSpendLimit)
if txLimit.Cmp(amount) == -1 && txLimit.Cmp(big.NewInt(0)) == 1 {
return false, fmt.Errorf("transaction amount (%s) is larger than the transactional limit (%s)", amount.String(), account.TxSpendLimit)
}
if contains(account.Blacklist, toAddress) {
return false, fmt.Errorf("%s is blacklisted", toAddress)
}
if len(account.Whitelist) > 0 && !contains(account.Whitelist, toAddress) {
return false, fmt.Errorf("%s is not in the whitelist", toAddress)
}
return true, nil
}
// Create a new unsigned payment transaction
func createPaymentTransaction(sourceAddress string, destinationAddress string, amount string, assetCode string, assetIssuer string) (*data.Payment, error) {
src, err := data.NewAccountFromAddress(sourceAddress)
if err != nil {
return nil, err
}
dest, err := data.NewAccountFromAddress(destinationAddress)
if err != nil {
Log(err)
return nil, err
}
// Convert the amount into an object
var amountObj *data.Amount
if strings.EqualFold(assetCode, "native") {
amountObj, err = data.NewAmount(amount + "/XRP")
if err != nil {
Log(err)
return nil, err
}
} else {
amountObj, err = data.NewAmount(amount + "/" + assetCode + "/" + assetIssuer)
if err != nil {
return nil, logical.CodedError(400, "invalid currency code or issuer")
}
}
// Create payment
payment := &data.Payment{
Destination: *dest,
Amount: *amountObj,
}
payment.TransactionType = data.PAYMENT
payment.Flags = new(data.TransactionFlag)
fee, err := data.NewNativeValue(int64(10))
base := payment.GetBase()
base.Fee = *fee
//base.Memos = new data.Memo{}
base.Account = *src
return payment, nil
}