Retrieve block headers only for header-only info (#5480)

* Add parity_getBlockHeaderByNumber

* Use parity_getBlockHeaderByNumber for retrieval

js/src/api/rpc/parity/parity.js

@@ -14,10 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-import {
-  inAddress, inAddresses, inData, inHex, inNumber16, inOptions, inBlockNumber, inDeriveHash, inDeriveIndex
-} from '../../format/input';
-import { outAccountInfo, outAddress, outAddresses, outChainStatus, outHistogram, outHwAccountInfo, outNodeKind, outNumber, outPeers, outRecentDapps, outTransaction, outVaultMeta } from '../../format/output';
+import { inAddress, inAddresses, inBlockNumber, inData, inDeriveHash, inDeriveIndex, inHex, inNumber16, inOptions } from '../../format/input';
+import { outAccountInfo, outAddress, outAddresses, outBlock, outChainStatus, outHistogram, outHwAccountInfo, outNodeKind, outNumber, outPeers, outRecentDapps, outTransaction, outVaultMeta } from '../../format/output';
 
 export default class Parity {
   constructor (transport) {
@@ -189,6 +187,12 @@ export default class Parity {
       .execute('parity_generateSecretPhrase');
   }
 
+  getBlockHeaderByNumber (blockNumber = 'latest') {
+    return this._transport
+      .execute('parity_getBlockHeaderByNumber', inBlockNumber(blockNumber))
+      .then(outBlock);
+  }
+
   getDappAddresses (dappId) {
     return this._transport
       .execute('parity_getDappAddresses', dappId)

js/src/dapps/registry/Events/actions.js

@@ -43,7 +43,7 @@ export const subscribe = (name, from = 0, to = 'pending') =>
 
         events.forEach((e) => {
           Promise.all([
-            api.eth.getBlockByNumber(e.blockNumber),
+            api.parity.getBlockHeaderByNumber(e.blockNumber),
             api.eth.getTransactionByHash(e.transactionHash)
           ])
           .then(([block, tx]) => {

js/src/dapps/signaturereg/services.js

@@ -158,7 +158,7 @@ export function attachEvents (contract, callback) {
 }
 
 export function getBlock (blockNumber) {
-  return api.eth.getBlockByNumber(blockNumber);
+  return api.parity.getBlockHeaderByNumber(blockNumber);
 }
 
 export function callRegister (instance, id, options = {}) {

js/src/dapps/tokendeploy/Deploy/Event/event.js

@@ -94,7 +94,7 @@ export default class Event extends Component {
 
     Promise
       .all([
-        api.eth.getBlockByNumber(event.blockNumber),
+        api.parity.getBlockHeaderByNumber(event.blockNumber),
         getCoin(event.params.tokenreg, event.params.coin)
       ])
       .then(([block, coin]) => {

js/src/dapps/tokendeploy/Transfer/Event/event.js

@@ -97,8 +97,8 @@ export default class Event extends Component {
       return;
     }
 
-    api.eth
-      .getBlockByNumber(event.blockNumber)
+    api.parity
+      .getBlockHeaderByNumber(event.blockNumber)
       .then((block) => {
         this.setState({ block });
       });

js/src/jsonrpc/interfaces/parity.js

@@ -296,6 +296,19 @@ export default {
     }
   },
 
+  getBlockHeaderByNumber: {
+    section: SECTION_NET,
+    desc: 'Returns block header information by number (same as eth_getBlockByNumber without transactions and uncles)',
+    params: [
+      {
+        type: BlockNumber,
+        desc: 'integer of a block number, or the string `\'earliest\'`, `\'latest\'` or `\'pending\'`, as in the [default block parameter](#the-default-block-parameter).',
+        example: fromDecimal(436)
+      }
+    ],
+    returns: 'See [eth_getBlockByHash](#eth_getblockbyhash) (without transactions and uncles)'
+  },
+
   getVaultMeta: {
     section: SECTION_VAULT,
     desc: 'Returns the metadata for a specific vault',

js/src/redux/providers/status.js

@@ -134,8 +134,8 @@ export default class Status {
 
         this._store.dispatch(statusBlockNumber(blockNumber));
 
-        this._api.eth
-          .getBlockByNumber(blockNumber)
+        this._api.parity
+          .getBlockHeaderByNumber(blockNumber)
           .then((block) => {
             if (!block) {
               return;
@@ -147,7 +147,7 @@ export default class Status {
             }));
           })
           .catch((error) => {
-            console.warn('status._subscribeBlockNumber', 'getBlockByNumber', error);
+            console.warn('status._subscribeBlockNumber', 'getBlockHeaderByNumber', error);
           });
       })
       .then((blockNumberSubscriptionId) => {

js/src/ui/TxList/store.js

@@ -70,32 +70,37 @@ export default class Store {
   }
 
   loadTransactions (_txhashes) {
-    const { eth } = this._api;
-
     // Ignore special cases and if the contents of _txhashes && this.sortedHashes are the same
     if (Array.isArray(_txhashes) || this.sameHashList(_txhashes)) {
       return;
     }
 
     // Remove any tx that are edited/cancelled
-    this.sortedHashes
-      .forEach((hash) => {
+    this.sortedHashes.forEach((hash) => {
       if (!_txhashes.includes(hash)) {
         this.removeHash(hash);
       }
     });
 
     // Add any new tx
-    _txhashes
-      .forEach((txhash) => {
-        if (this.sortedHashes.includes(txhash)) { return; }
-        eth.getTransactionByHash(txhash)
+    _txhashes.forEach((txhash) => {
+      if (this.sortedHashes.includes(txhash)) {
+        return;
+      }
+
+      this._api.eth
+        .getTransactionByHash(txhash)
         .then((tx) => {
-            if (!tx) { return; }
+          if (!tx) {
+            return;
+          }
+
           this.transactions[txhash] = tx;
+
           // If the tx has a blockHash, let's get the blockNumber, otherwise it's ready to be added
           if (tx.blockHash) {
-              eth.getBlockByNumber(tx.blockNumber)
+            this._api.parity
+              .getBlockHeaderByNumber(tx.blockNumber)
               .then((block) => {
                 this.blocks[tx.blockNumber] = block;
                 this.addHash(txhash);
@@ -108,10 +113,9 @@ export default class Store {
   }
 
   cancelTransaction = (txComponent, tx) => {
-    const { parity } = this._api;
     const { hash } = tx;
 
-    parity
+    this._api.parity
       .removeTransaction(hash)
       .then(() => {
         txComponent.setState({ canceled: true });
@@ -122,13 +126,12 @@ export default class Store {
   }
 
   editTransaction = (txComponent, tx) => {
-    const { parity } = this._api;
     const { hash, gas, gasPrice, to, from, value, input, condition } = tx;
 
-    parity
+    this._api.parity
       .removeTransaction(hash)
       .then(() => {
-        parity.postTransaction({
+        return this._api.parity.postTransaction({
           from,
           to,
           gas,

js/src/views/Contract/Events/Event/event.js

@@ -146,7 +146,7 @@ export default class Event extends Component {
 
     Promise
       .all([
-        api.eth.getBlockByNumber(event.blockNumber),
+        api.parity.getBlockHeaderByNumber(event.blockNumber),
         api.eth.getTransactionByHash(event.transactionHash)
       ])
       .then(([block, transaction]) => {