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chainclient.go
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chainclient.go
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package chainclient
import (
"context"
"math"
iotago "github.com/iotaledger/iota.go/v3"
"github.com/iotaledger/wasp/clients/apiclient"
"github.com/iotaledger/wasp/clients/apiextensions"
"github.com/iotaledger/wasp/packages/cryptolib"
"github.com/iotaledger/wasp/packages/isc"
"github.com/iotaledger/wasp/packages/kv/codec"
"github.com/iotaledger/wasp/packages/kv/dict"
"github.com/iotaledger/wasp/packages/l1connection"
"github.com/iotaledger/wasp/packages/transaction"
"github.com/iotaledger/wasp/packages/vm/core/accounts"
)
// Client allows to interact with a specific chain in the node, for example to send on-ledger or off-ledger requests
type Client struct {
Layer1Client l1connection.Client
WaspClient *apiclient.APIClient
ChainID isc.ChainID
KeyPair cryptolib.VariantKeyPair
}
// New creates a new chainclient.Client
func New(
layer1Client l1connection.Client,
waspClient *apiclient.APIClient,
chainID isc.ChainID,
keyPair cryptolib.VariantKeyPair,
) *Client {
return &Client{
Layer1Client: layer1Client,
WaspClient: waspClient,
ChainID: chainID,
KeyPair: keyPair,
}
}
type PostRequestParams struct {
Transfer *isc.Assets
Args dict.Dict
Nonce uint64
NFT *isc.NFT
Allowance *isc.Assets
gasBudget uint64
AutoAdjustStorageDeposit bool
}
func (par *PostRequestParams) GasBudget() uint64 {
if par.gasBudget == 0 {
return math.MaxUint64
}
return par.gasBudget
}
func defaultParams(params ...PostRequestParams) PostRequestParams {
if len(params) > 0 {
return params[0]
}
return PostRequestParams{}
}
// Post1Request sends an on-ledger transaction with one request on it to the chain
func (c *Client) Post1Request(
contractHname isc.Hname,
entryPoint isc.Hname,
params ...PostRequestParams,
) (*iotago.Transaction, error) {
outputsSet, err := c.Layer1Client.OutputMap(c.KeyPair.Address())
if err != nil {
return nil, err
}
return c.post1RequestWithOutputs(contractHname, entryPoint, outputsSet, params...)
}
// PostNRequest sends n consecutive on-ledger transactions with one request on each, to the chain
func (c *Client) PostNRequests(
contractHname isc.Hname,
entryPoint isc.Hname,
requestsCount int,
params ...PostRequestParams,
) ([]*iotago.Transaction, error) {
var err error
outputs, err := c.Layer1Client.OutputMap(c.KeyPair.Address())
if err != nil {
return nil, err
}
transactions := make([]*iotago.Transaction, requestsCount)
for i := 0; i < requestsCount; i++ {
transactions[i], err = c.post1RequestWithOutputs(contractHname, entryPoint, outputs, params...)
if err != nil {
return nil, err
}
txID, err := transactions[i].ID()
if err != nil {
return nil, err
}
for _, input := range transactions[i].Essence.Inputs {
if utxoInput, ok := input.(*iotago.UTXOInput); ok {
delete(outputs, utxoInput.ID())
}
}
for index, output := range transactions[i].Essence.Outputs {
if basicOutput, ok := output.(*iotago.BasicOutput); ok {
if basicOutput.Ident().Equal(c.KeyPair.Address()) {
outputID := iotago.OutputIDFromTransactionIDAndIndex(txID, uint16(index))
outputs[outputID] = transactions[i].Essence.Outputs[index]
}
}
}
}
return transactions, nil
}
func (c *Client) post1RequestWithOutputs(
contractHname isc.Hname,
entryPoint isc.Hname,
outputs iotago.OutputSet,
params ...PostRequestParams,
) (*iotago.Transaction, error) {
par := defaultParams(params...)
tx, err := transaction.NewRequestTransaction(
transaction.NewRequestTransactionParams{
SenderKeyPair: c.KeyPair,
SenderAddress: c.KeyPair.Address(),
UnspentOutputs: outputs,
UnspentOutputIDs: isc.OutputSetToOutputIDs(outputs),
Request: &isc.RequestParameters{
TargetAddress: c.ChainID.AsAddress(),
Assets: par.Transfer,
AdjustToMinimumStorageDeposit: par.AutoAdjustStorageDeposit,
Metadata: &isc.SendMetadata{
TargetContract: contractHname,
EntryPoint: entryPoint,
Params: par.Args,
Allowance: par.Allowance,
GasBudget: par.GasBudget(),
},
},
NFT: par.NFT,
},
)
if err != nil {
return nil, err
}
_, err = c.Layer1Client.PostTxAndWaitUntilConfirmation(tx)
return tx, err
}
func (c *Client) ISCNonce(ctx context.Context) (uint64, error) {
result, _, err := c.WaspClient.ChainsApi.CallView(ctx, c.ChainID.String()).
ContractCallViewRequest(apiclient.ContractCallViewRequest{
ContractHName: accounts.Contract.Hname().String(),
FunctionHName: accounts.ViewGetAccountNonce.Hname().String(),
Arguments: apiextensions.JSONDictToAPIJSONDict(dict.Dict{
accounts.ParamAgentID: isc.NewAgentID(c.KeyPair.Address()).Bytes(),
}.JSONDict()),
}).Execute()
if err != nil {
return 0, err
}
resultDict, err := apiextensions.APIJsonDictToDict(*result)
if err != nil {
return 0, err
}
return codec.DecodeUint64(resultDict.Get(accounts.ParamAccountNonce))
}
// PostOffLedgerRequest sends an off-ledger tx via the wasp node web api
func (c *Client) PostOffLedgerRequest(ctx context.Context,
contractHname isc.Hname,
entrypoint isc.Hname,
params ...PostRequestParams,
) (isc.OffLedgerRequest, error) {
par := defaultParams(params...)
if par.Nonce == 0 {
nonce, err := c.ISCNonce(ctx)
if err != nil {
return nil, err
}
par.Nonce = nonce
}
req := isc.NewOffLedgerRequest(c.ChainID, contractHname, entrypoint, par.Args, par.Nonce, par.GasBudget())
req.WithAllowance(par.Allowance)
req.WithNonce(par.Nonce)
signed := req.Sign(c.KeyPair)
request := iotago.EncodeHex(signed.Bytes())
offLedgerRequest := apiclient.OffLedgerRequest{
ChainId: c.ChainID.String(),
Request: request,
}
_, err := c.WaspClient.RequestsApi.
OffLedger(ctx).
OffLedgerRequest(offLedgerRequest).
Execute()
return signed, err
}
func (c *Client) DepositFunds(n uint64) (*iotago.Transaction, error) {
return c.Post1Request(accounts.Contract.Hname(), accounts.FuncDeposit.Hname(), PostRequestParams{
Transfer: isc.NewAssets(n, nil),
})
}
// NewPostRequestParams simplifies encoding of request parameters
func NewPostRequestParams(p ...interface{}) *PostRequestParams {
return &PostRequestParams{
Args: parseParams(p),
Transfer: isc.NewEmptyAssets(),
Allowance: isc.NewEmptyAssets(),
}
}
func (par *PostRequestParams) WithTransfer(transfer *isc.Assets) *PostRequestParams {
par.Transfer = transfer
return par
}
func (par *PostRequestParams) WithBaseTokens(i uint64) *PostRequestParams {
par.Transfer.AddBaseTokens(i)
return par
}
func (par *PostRequestParams) WithGasBudget(budget uint64) *PostRequestParams {
par.gasBudget = budget
return par
}
func parseParams(params []interface{}) dict.Dict {
if len(params) == 1 {
return params[0].(dict.Dict)
}
return codec.MakeDict(toMap(params))
}
// makes map without hashing
func toMap(params []interface{}) map[string]interface{} {
par := make(map[string]interface{})
if len(params) == 0 {
return par
}
if len(params)%2 != 0 {
panic("toMap: len(params) % 2 != 0")
}
for i := 0; i < len(params)/2; i++ {
key, ok := params[2*i].(string)
if !ok {
panic("toMap: string expected")
}
par[key] = params[2*i+1]
}
return par
}