p2p/dnsdisc: add implementation of EIP-1459 (#20094)

This adds an implementation of node discovery via DNS TXT records to the
go-ethereum library. The implementation doesn't match EIP-1459 exactly,
the main difference being that this implementation uses separate merkle
trees for tree links and ENRs. The EIP will be updated to match p2p/dnsdisc.

To maintain DNS trees, cmd/devp2p provides a frontend for the p2p/dnsdisc
library. The new 'dns' subcommands can be used to create, sign and deploy DNS
discovery trees.

vendor/github.com/cloudflare/cloudflare-go/accounts.go

@@ -0,0 +1,114 @@
+package cloudflare
+
+import (
+	"encoding/json"
+	"net/url"
+	"strconv"
+
+	"github.com/pkg/errors"
+)
+
+// AccountSettings outlines the available options for an account.
+type AccountSettings struct {
+	EnforceTwoFactor bool `json:"enforce_twofactor"`
+}
+
+// Account represents the root object that owns resources.
+type Account struct {
+	ID       string           `json:"id,omitempty"`
+	Name     string           `json:"name,omitempty"`
+	Settings *AccountSettings `json:"settings"`
+}
+
+// AccountResponse represents the response from the accounts endpoint for a
+// single account ID.
+type AccountResponse struct {
+	Result Account `json:"result"`
+	Response
+	ResultInfo `json:"result_info"`
+}
+
+// AccountListResponse represents the response from the list accounts endpoint.
+type AccountListResponse struct {
+	Result []Account `json:"result"`
+	Response
+	ResultInfo `json:"result_info"`
+}
+
+// AccountDetailResponse is the API response, containing a single Account.
+type AccountDetailResponse struct {
+	Success  bool     `json:"success"`
+	Errors   []string `json:"errors"`
+	Messages []string `json:"messages"`
+	Result   Account  `json:"result"`
+}
+
+// Accounts returns all accounts the logged in user has access to.
+//
+// API reference: https://api.cloudflare.com/#accounts-list-accounts
+func (api *API) Accounts(pageOpts PaginationOptions) ([]Account, ResultInfo, error) {
+	v := url.Values{}
+	if pageOpts.PerPage > 0 {
+		v.Set("per_page", strconv.Itoa(pageOpts.PerPage))
+	}
+	if pageOpts.Page > 0 {
+		v.Set("page", strconv.Itoa(pageOpts.Page))
+	}
+
+	uri := "/accounts"
+	if len(v) > 0 {
+		uri = uri + "?" + v.Encode()
+	}
+
+	res, err := api.makeRequest("GET", uri, nil)
+	if err != nil {
+		return []Account{}, ResultInfo{}, errors.Wrap(err, errMakeRequestError)
+	}
+
+	var accListResponse AccountListResponse
+	err = json.Unmarshal(res, &accListResponse)
+	if err != nil {
+		return []Account{}, ResultInfo{}, errors.Wrap(err, errUnmarshalError)
+	}
+	return accListResponse.Result, accListResponse.ResultInfo, nil
+}
+
+// Account returns a single account based on the ID.
+//
+// API reference: https://api.cloudflare.com/#accounts-account-details
+func (api *API) Account(accountID string) (Account, ResultInfo, error) {
+	uri := "/accounts/" + accountID
+
+	res, err := api.makeRequest("GET", uri, nil)
+	if err != nil {
+		return Account{}, ResultInfo{}, errors.Wrap(err, errMakeRequestError)
+	}
+
+	var accResponse AccountResponse
+	err = json.Unmarshal(res, &accResponse)
+	if err != nil {
+		return Account{}, ResultInfo{}, errors.Wrap(err, errUnmarshalError)
+	}
+
+	return accResponse.Result, accResponse.ResultInfo, nil
+}
+
+// UpdateAccount allows management of an account using the account ID.
+//
+// API reference: https://api.cloudflare.com/#accounts-update-account
+func (api *API) UpdateAccount(accountID string, account Account) (Account, error) {
+	uri := "/accounts/" + accountID
+
+	res, err := api.makeRequest("PUT", uri, account)
+	if err != nil {
+		return Account{}, errors.Wrap(err, errMakeRequestError)
+	}
+
+	var a AccountDetailResponse
+	err = json.Unmarshal(res, &a)
+	if err != nil {
+		return Account{}, errors.Wrap(err, errUnmarshalError)
+	}
+
+	return a.Result, nil
+}