Add script for importing contributions

scripts/import/contributions.js

@@ -0,0 +1,39 @@
+const fs = require('fs');
+const Kredits = require('../../lib/kredits');
+
+async function main() {
+  kredits = new Kredits(hre.ethers.provider, hre.ethers.provider.getSigner())
+  await kredits.init();
+
+  console.log(`Using Contribution at: ${kredits.Contribution.contract.address}`);
+
+  try {
+    const data = fs.readFileSync("./data/contributions.json");
+    const contributions = JSON.parse(data);
+    const ids = Object.keys(contributions)
+                      .map(k => parseInt(k))
+                      .sort(function(a, b){return a-b});
+
+    const currentBlockHeight = await kredits.provider.getBlockNumber();
+    const confirmationPeriod = 40320 // blocks
+    const unconfirmedHeight = currentBlockHeight + confirmationPeriod;
+
+    for (const contributionId of ids) {
+      const c = contributions[contributionId.toString()];
+
+      const confirmedAtBlock = c.confirmed ? currentBlockHeight : unconfirmedHeight;
+
+      const result = await kredits.Contribution.contract.add(
+        c.amount, c.contributorId,
+        c.hashDigest, c.hashFunction, c.hashSize,
+        confirmedAtBlock, c.vetoed
+      );
+      // await result.wait();
+      console.log(`Added contribution #${contributionId}: ${result.hash}`);
+    };
+  } catch(e) {
+    console.log(e);
+  }
+}
+
+main();