WIP: partial README for partial code

Author: coolaj86

README.md

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+# DashGov.js
+
+Utility functions for Dash governance on the blockchain.
+
+## Prosposal
+
+- proposal close (previous end epoch)
+- vote close
+- superblock (payment)
+- proposal open (start epoch)
+- vote open
+- proposal close (upcoming end epoch)
+
+```js
+let current = {
+  height: 2114623,
+  ms: new Date("2024-08-01 22:01:00").valueOf(),
+};
+let cycles = 3;
+let estimates = DashGov.estimateFutureBlocks(current, cycles);
+
+let proposalObj = {
+  start_epoch: current.proposalOpen[0].seconds,
+  end_epoch: current.proposalClose[2].seconds,
+  name: "test-proposal-4",
+  payment_address: "yM7M4YJFv58hgea9FUxLtjKBpKXCsjxWNX",
+  payment_amount: 100,
+  type: 1,
+  url: "https://www.dashcentral.org/p/test-proposal-4",
+};
+
+let proposalJson = JSON.stringify(proposal);
+let encoder = new TextEncoder();
+let proposalBytes = encoder.encode(proposalJson);
+
+// JSON *should* be serialized canonically with lexicographically-sorted keys,
+// HOWEVER, a hex string (not bytes) is used to guarantee reproducible output.
+let proposalHex = Gobj.utils.bytesToHex(proposalBytes);
+
+let now = Date.now();
+let secs = now / 1000;
+secs = Math.round(secs);
+
+// Note: the full object is shown for completeness, however, most
+//       gobject args were either deprecated or never implemented
+let gobj = {
+  // hashParent: null,
+  // revision: 1, // MUST be one
+  time: secs,
+  hexJson: proposalHex,
+  // signature: null,
+};
+
+gobj = DashGov.normalize(gobj);
+
+let gobjBytes = DashGov.serializeForCollateralTx(gobj);
+let gobjOpReturn = await DashGov.doubleSha256Hash(gobjBytes);
+
+let keyUtils = {
+  getPrivateKey: function (info) {
+    // lookup by info.address or similar
+    let privKeyBytes = doStuff();
+    return privKeyBytes;
+  },
+};
+let dashTx = DashTx.create(keyUtils);
+let txraw = await dashTx.createMemo({ bytes: gobjOpReturnBytes });
+
+let result = await RPC.request({
+  method: "sendrawtransaction",
+  params: [txraw.hex],
+});
+
+// poll for txid to appear in recent blocks
+let txid = result.txid;
+
+let result = await RPC.request({
+  method: "gobject",
+  params: [
+    "submit",
+    gobj.hashParent,
+    gobj.revision,
+    gobj.time,
+    gobj.hexJson,
+    txid,
+  ],
+});
+```
+
+# Notes
+
+```text
+A block is generated for a self-correcting target average of 155 seconds.
+(actually 157.64 seconds over the 7 year average)
+
+Superblock is every 16616 blocks (rounded up from 30 days).
+Superblock is when payment occurs.
+
+Voting ends 1662 blocks before the superblock (rounded up from 3 days).
+ // ~(60*24*3)/2.6
+
+Votes after the block deadline are discarded for that superblock, but will
+be counted for the next, if the proposal is still active.
+```