Bits in hex for rpc block methods

CHANGELOG.md

@@ -105,6 +105,11 @@ that have many transactions.
   which coins have been spent and are currently available.
 - `GET /` has new fields `.indexes.{addr,tx}` for the status of indexers.
 
+#### RPC
+
+- Both `getblock` and `getblockheader` return `bits` in base 16 as a string
+  instead of base 10 and a number.
+
 ### Network changes
 
 - Regtest params have been updated to correspond with other bitcoin

lib/node/rpc.js

@@ -2723,7 +2723,7 @@ class RPC extends RPCBase {
       time: entry.time,
       mediantime: mtp,
       nonce: entry.nonce,
-      bits: entry.bits,
+      bits: hex32(entry.bits),
       difficulty: toDifficulty(entry.bits),
       chainwork: entry.chainwork.toString('hex', 64),
       previousblockhash: !entry.prevBlock.equals(consensus.ZERO_HASH)
@@ -2767,7 +2767,7 @@ class RPC extends RPCBase {
       time: entry.time,
       mediantime: mtp,
       nonce: entry.nonce,
-      bits: entry.bits,
+      bits: hex32(entry.bits),
       difficulty: toDifficulty(entry.bits),
       chainwork: entry.chainwork.toString('hex', 64),
       nTx: txs.length,

test/node-rpc-test.js

@@ -87,6 +87,7 @@ describe('RPC', function() {
 
       assert.deepEqual(chain.height, info.height);
       assert.deepEqual(chain.tip, info.hash);
+      assert.equal(info.bits, '207fffff');
     });
 
     it('should return correct height', async () => {