Add sign task

packages/ethernaut-signer/src/tasks/sign.js

@@ -0,0 +1,19 @@
+const output = require('common/src/output')
+const storage = require('../internal/storage')
+const { getWallet } = require('../internal/signers')
+
+require('../scopes/sig')
+  .task('sign', 'Signs a message with a wallet')
+  .addOptionalPositionalParam('message', 'The message to sign')
+  .setAction(async ({ message }) => {
+    try {
+      const signers = storage.readSigners()
+      const signer = signers[signers.activeSigner]
+
+      const wallet = getWallet(signer.pk)
+
+      output.resultBox(wallet.signMessageSync(message))
+    } catch (err) {
+      return output.errorBox(err)
+    }
+  })

packages/ethernaut-signer/test/tasks/sign.test.js

@@ -0,0 +1,41 @@
+const { Terminal } = require('common/src/terminal')
+const storage = require('../../src/internal/storage')
+const { getWallet } = require('../../src/internal/signers')
+
+describe('info', function () {
+  const terminal = new Terminal()
+
+  const demoSig = {
+    address: '0x23618e81E3f5cdF7f54C3d65f7FBc0aBf5B21E8f',
+    pk: '0xdbda1821b80551c9d65939329250298aa3472ba22feea921c0cf5d620ea67b97',
+  }
+
+  describe('when queryig info about a signer', function () {
+    before('add test signers', async function () {
+      const signers = storage.readSigners()
+      if (!('test__3' in signers)) signers.test__3 = demoSig
+      signers.activeSigner = 'test__3'
+      storage.storeSigners(signers)
+    })
+
+    after('remove test signers', async function () {
+      const signers = storage.readSigners()
+      if ('test__3' in signers) delete signers.test__3
+      storage.storeSigners(signers)
+    })
+
+    describe('when signing a message', function () {
+      before('sign', async function () {
+        await terminal.run('npx hardhat sig sign "hello"')
+      })
+
+      it('prints the expected signature', async function () {
+        terminal.has('Result')
+
+        const wallet = getWallet(demoSig.pk)
+        const sig = wallet.signMessageSync('hello')
+        terminal.has(sig.slice(0, 15))
+      })
+    })
+  })
+})