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account.go
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account.go
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// Copyright 2020 Coinbase, Inc.
//
// 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 fetcher
import (
"context"
"fmt"
"github.com/coinbase/rosetta-sdk-go/asserter"
"github.com/coinbase/rosetta-sdk-go/types"
)
// AccountBalance returns the validated response
// from the AccountBalance method. If a block
// is provided, a historical lookup is performed.
func (f *Fetcher) AccountBalance(
ctx context.Context,
network *types.NetworkIdentifier,
account *types.AccountIdentifier,
block *types.PartialBlockIdentifier,
) (*types.BlockIdentifier, []*types.Amount, map[string]interface{}, error) {
response, _, err := f.rosettaClient.AccountAPI.AccountBalance(ctx,
&types.AccountBalanceRequest{
NetworkIdentifier: network,
AccountIdentifier: account,
BlockIdentifier: block,
},
)
if err != nil {
return nil, nil, nil, err
}
responseBlock := response.BlockIdentifier
balances := response.Balances
if err := asserter.AccountBalanceResponse(
block,
responseBlock,
balances,
); err != nil {
return nil, nil, nil, err
}
return responseBlock, balances, response.Metadata, nil
}
// AccountBalanceRetry retrieves the validated AccountBalance
// with a specified number of retries and max elapsed time.
// If a block is provided, a historical lookup is performed.
func (f *Fetcher) AccountBalanceRetry(
ctx context.Context,
network *types.NetworkIdentifier,
account *types.AccountIdentifier,
block *types.PartialBlockIdentifier,
) (*types.BlockIdentifier, []*types.Amount, map[string]interface{}, error) {
backoffRetries := backoffRetries(
f.retryElapsedTime,
f.maxRetries,
)
for {
responseBlock, balances, metadata, err := f.AccountBalance(
ctx,
network,
account,
block,
)
if err == nil {
return responseBlock, balances, metadata, nil
}
if ctx.Err() != nil {
return nil, nil, nil, ctx.Err()
}
if !tryAgain(
fmt.Sprintf("account %s", types.PrettyPrintStruct(account)),
backoffRetries,
err,
) {
break
}
}
return nil, nil, nil, fmt.Errorf(
"%w: unable to fetch account %s",
ErrExhaustedRetries,
types.PrettyPrintStruct(account),
)
}