diff --git a/CHANGELOG.md b/CHANGELOG.md
index a5a6e5fb..da09a6b9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,15 @@ and this project adheres to
   connection tx, as well as Tendermint.
 - @cosmjs/stargate: Add support for IBC message types in
   `SigningStargateClient`.
+- @cosmjs/amino: New package created that contains the shared amino signing
+  functionality for @cosmjs/launchpad and @cosmjs/stargate.
+- @cosmjs/amino: Split public key interfaces into `Pubkey`, `SinglePubkey` and
+  `Secp256k1Pubkey` where `Pubkey` is a generalization of the old `PubKey` that
+  supported nested pubkeys for multisig. `SinglePubkey` is the old `PubKey` in
+  which the `value` is a base64 encoded string. And `Secp256k1Pubkey` is a
+  single secp256k1 pubkey.
+- @cosmjs/utils: The new `arrayContentStartsWith` works similar to
+  `arrayContentEquals` but only checks the start of an array.
 
 ### Changed
 
@@ -40,6 +49,9 @@ and this project adheres to
   `blockIdFlag` is `BlockIdFlag.Absent`. The decoding into `CommitSignature` is
   only updated for the class `Tendermint34Client`, not for `Client`. Please
   migrate to the former.
+- @cosmjs/launchpad: `rawSecp256k1PubkeyToAddress` was removed. Instead use
+  `Bech32.encode(prefix, rawSecp256k1PubkeyToRawAddress(pubkeyRaw))` with
+  `rawSecp256k1PubkeyToRawAddress` from @cosmjs/amino.
 
 ### Deprecated
 
diff --git a/packages/amino/.eslintignore b/packages/amino/.eslintignore
new file mode 100644
index 00000000..f373a53f
--- /dev/null
+++ b/packages/amino/.eslintignore
@@ -0,0 +1,8 @@
+node_modules/
+
+build/
+custom_types/
+dist/
+docs/
+generated/
+types/
diff --git a/packages/amino/.gitignore b/packages/amino/.gitignore
new file mode 100644
index 00000000..68bf3735
--- /dev/null
+++ b/packages/amino/.gitignore
@@ -0,0 +1,3 @@
+build/
+dist/
+docs/
diff --git a/packages/amino/.nycrc.yml b/packages/amino/.nycrc.yml
new file mode 120000
index 00000000..1f95ac55
--- /dev/null
+++ b/packages/amino/.nycrc.yml
@@ -0,0 +1 @@
+../../.nycrc.yml
\ No newline at end of file
diff --git a/packages/amino/README.md b/packages/amino/README.md
new file mode 100644
index 00000000..31c09c37
--- /dev/null
+++ b/packages/amino/README.md
@@ -0,0 +1,12 @@
+# @cosmjs/amino
+
+[![npm version](https://img.shields.io/npm/v/@cosmjs/amino.svg)](https://www.npmjs.com/package/@cosmjs/amino)
+
+Helpers for Amino based signing which are shared between @cosmjs/launchpad and
+@cosmjs/stargate.
+
+## License
+
+This package is part of the cosmjs repository, licensed under the Apache License
+2.0 (see [NOTICE](https://github.com/cosmos/cosmjs/blob/main/NOTICE) and
+[LICENSE](https://github.com/cosmos/cosmjs/blob/main/LICENSE)).
diff --git a/packages/amino/jasmine-testrunner.js b/packages/amino/jasmine-testrunner.js
new file mode 100755
index 00000000..6558a133
--- /dev/null
+++ b/packages/amino/jasmine-testrunner.js
@@ -0,0 +1,39 @@
+#!/usr/bin/env node
+/* eslint-disable @typescript-eslint/naming-convention */
+
+if (process.env.SES_ENABLED) {
+  require("ses/lockdown");
+  // eslint-disable-next-line no-undef
+  lockdown();
+}
+
+require("source-map-support").install();
+const defaultSpecReporterConfig = require("../../jasmine-spec-reporter.config.json");
+
+// setup Jasmine
+const Jasmine = require("jasmine");
+const jasmine = new Jasmine();
+jasmine.loadConfig({
+  spec_dir: "build",
+  spec_files: ["**/*.spec.js"],
+  helpers: [],
+  random: false,
+  seed: null,
+  stopSpecOnExpectationFailure: false,
+});
+jasmine.jasmine.DEFAULT_TIMEOUT_INTERVAL = 15 * 1000;
+
+// setup reporter
+const { SpecReporter } = require("jasmine-spec-reporter");
+const reporter = new SpecReporter({
+  ...defaultSpecReporterConfig,
+  spec: {
+    ...defaultSpecReporterConfig.spec,
+    displaySuccessful: !process.argv.includes("--quiet"),
+  },
+});
+
+// initialize and execute
+jasmine.env.clearReporters();
+jasmine.addReporter(reporter);
+jasmine.execute();
diff --git a/packages/amino/karma.conf.js b/packages/amino/karma.conf.js
new file mode 100644
index 00000000..006da5fe
--- /dev/null
+++ b/packages/amino/karma.conf.js
@@ -0,0 +1,47 @@
+module.exports = function (config) {
+  config.set({
+    // base path that will be used to resolve all patterns (eg. files, exclude)
+    basePath: ".",
+
+    // frameworks to use
+    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
+    frameworks: ["jasmine"],
+
+    // list of files / patterns to load in the browser
+    files: ["dist/web/tests.js"],
+
+    client: {
+      jasmine: {
+        random: false,
+        timeoutInterval: 15000,
+      },
+    },
+
+    // test results reporter to use
+    // possible values: 'dots', 'progress'
+    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
+    reporters: ["progress", "kjhtml"],
+
+    // web server port
+    port: 9876,
+
+    // enable / disable colors in the output (reporters and logs)
+    colors: true,
+
+    // level of logging
+    // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
+    logLevel: config.LOG_INFO,
+
+    // enable / disable watching file and executing tests whenever any file changes
+    autoWatch: false,
+
+    // start these browsers
+    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
+    browsers: ["Firefox"],
+
+    browserNoActivityTimeout: 90000,
+
+    // Keep brower open for debugging. This is overridden by yarn scripts
+    singleRun: false,
+  });
+};
diff --git a/packages/amino/nonces/README.txt b/packages/amino/nonces/README.txt
new file mode 100644
index 00000000..092fe732
--- /dev/null
+++ b/packages/amino/nonces/README.txt
@@ -0,0 +1 @@
+Directory used to trigger lerna package updates for all packages
diff --git a/packages/amino/package.json b/packages/amino/package.json
new file mode 100644
index 00000000..0df89f2b
--- /dev/null
+++ b/packages/amino/package.json
@@ -0,0 +1,49 @@
+{
+  "name": "@cosmjs/amino",
+  "version": "0.25.0-alpha.0",
+  "description": "Helpers for Amino based signing which are shared between @cosmjs/launchpad and @cosmjs/stargate.",
+  "contributors": [
+    "Simon Warta <webmaster128@users.noreply.github.com>"
+  ],
+  "license": "Apache-2.0",
+  "main": "build/index.js",
+  "types": "build/index.d.ts",
+  "files": [
+    "build/",
+    "*.md",
+    "!*.spec.*",
+    "!**/testdata/"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/cosmos/cosmjs/tree/main/packages/amino"
+  },
+  "publishConfig": {
+    "access": "public"
+  },
+  "scripts": {
+    "docs": "typedoc --options typedoc.js",
+    "lint": "eslint --max-warnings 0 \"**/*.{js,ts}\"",
+    "lint-fix": "eslint --max-warnings 0 \"**/*.{js,ts}\" --fix",
+    "format": "prettier --write --loglevel warn \"./src/**/*.ts\"",
+    "format-text": "prettier --write --prose-wrap always --print-width 80 \"./*.md\"",
+    "test-node": "node jasmine-testrunner.js",
+    "test-edge": "yarn pack-web && karma start --single-run --browsers Edge",
+    "test-firefox": "yarn pack-web && karma start --single-run --browsers Firefox",
+    "test-chrome": "yarn pack-web && karma start --single-run --browsers ChromeHeadless",
+    "test-safari": "yarn pack-web && karma start --single-run --browsers Safari",
+    "test": "yarn build-or-skip && yarn test-node",
+    "coverage": "nyc --reporter=text --reporter=lcov yarn test --quiet",
+    "prebuild": "shx rm -rf ./build",
+    "build": "tsc",
+    "build-or-skip": "[ -n \"$SKIP_BUILD\" ] || yarn build",
+    "pack-web": "yarn build-or-skip && webpack --mode development --config webpack.web.config.js"
+  },
+  "dependencies": {
+    "@cosmjs/crypto": "^0.25.0-alpha.0",
+    "@cosmjs/encoding": "^0.25.0-alpha.0",
+    "@cosmjs/utils": "^0.25.0-alpha.0"
+  },
+  "devDependencies": {
+  }
+}
diff --git a/packages/amino/src/addresses.spec.ts b/packages/amino/src/addresses.spec.ts
new file mode 100644
index 00000000..de90b7b9
--- /dev/null
+++ b/packages/amino/src/addresses.spec.ts
@@ -0,0 +1,91 @@
+import { Bech32, fromHex, toBase64 } from "@cosmjs/encoding";
+
+import { pubkeyToAddress, pubkeyToRawAddress } from "./addresses";
+import { decodeBech32Pubkey } from "./encoding";
+import { MultisigThresholdPubkey } from "./pubkeys";
+
+describe("addresses", () => {
+  describe("pubkeyToRawAddress", () => {
+    it("works for Secp256k1", () => {
+      const pubkey = {
+        type: "tendermint/PubKeySecp256k1",
+        value: "AtQaCqFnshaZQp6rIkvAPyzThvCvXSDO+9AzbxVErqJP",
+      };
+      expect(pubkeyToRawAddress(pubkey)).toEqual(
+        Bech32.decode("cosmos1h806c7khnvmjlywdrkdgk2vrayy2mmvf9rxk2r").data,
+      );
+    });
+
+    it("works for Ed25519", () => {
+      const pubkey = {
+        type: "tendermint/PubKeyEd25519",
+        value: toBase64(fromHex("12ee6f581fe55673a1e9e1382a0829e32075a0aa4763c968bc526e1852e78c95")),
+      };
+      expect(pubkeyToRawAddress(pubkey)).toEqual(
+        Bech32.decode("cosmos1pfq05em6sfkls66ut4m2257p7qwlk448h8mysz").data,
+      );
+    });
+
+    it("works for multisig", () => {
+      const test1 = decodeBech32Pubkey(
+        "wasmpub1addwnpepqwxttx8w2sfs6d8cuzqcuau84grp8xsw95qzdjkmvc44tnckskdxw3zw2km",
+      );
+      const test2 = decodeBech32Pubkey(
+        "wasmpub1addwnpepq2gx7x7e29kge5a4ycunytyqr0u8ynql5h583s8r9wdads9m3v8ks6y0nhc",
+      );
+      const test3 = decodeBech32Pubkey(
+        "wasmpub1addwnpepq0xfx5vavxmgdkn0p6x0l9p3udttghu3qcldd7ql08wa3xy93qq0xuzvtxc",
+      );
+
+      const testgroup1: MultisigThresholdPubkey = {
+        type: "tendermint/PubKeyMultisigThreshold",
+        value: {
+          threshold: "2",
+          pubkeys: [test1, test2, test3],
+        },
+      };
+      expect(pubkeyToRawAddress(testgroup1)).toEqual(fromHex("0892a77fab2fa7e192c3b7b2741e6682f3abb72f"));
+    });
+  });
+
+  describe("pubkeyToAddress", () => {
+    it("works for Secp256k1", () => {
+      const prefix = "cosmos";
+      const pubkey = {
+        type: "tendermint/PubKeySecp256k1",
+        value: "AtQaCqFnshaZQp6rIkvAPyzThvCvXSDO+9AzbxVErqJP",
+      };
+      expect(pubkeyToAddress(pubkey, prefix)).toEqual("cosmos1h806c7khnvmjlywdrkdgk2vrayy2mmvf9rxk2r");
+    });
+
+    it("works for Ed25519", () => {
+      const prefix = "cosmos";
+      const pubkey = {
+        type: "tendermint/PubKeyEd25519",
+        value: toBase64(fromHex("12ee6f581fe55673a1e9e1382a0829e32075a0aa4763c968bc526e1852e78c95")),
+      };
+      expect(pubkeyToAddress(pubkey, prefix)).toEqual("cosmos1pfq05em6sfkls66ut4m2257p7qwlk448h8mysz");
+    });
+
+    it("works for multisig", () => {
+      const test1 = decodeBech32Pubkey(
+        "wasmpub1addwnpepqwxttx8w2sfs6d8cuzqcuau84grp8xsw95qzdjkmvc44tnckskdxw3zw2km",
+      );
+      const test2 = decodeBech32Pubkey(
+        "wasmpub1addwnpepq2gx7x7e29kge5a4ycunytyqr0u8ynql5h583s8r9wdads9m3v8ks6y0nhc",
+      );
+      const test3 = decodeBech32Pubkey(
+        "wasmpub1addwnpepq0xfx5vavxmgdkn0p6x0l9p3udttghu3qcldd7ql08wa3xy93qq0xuzvtxc",
+      );
+
+      const testgroup1: MultisigThresholdPubkey = {
+        type: "tendermint/PubKeyMultisigThreshold",
+        value: {
+          threshold: "2",
+          pubkeys: [test1, test2, test3],
+        },
+      };
+      expect(pubkeyToAddress(testgroup1, "wasm")).toEqual("wasm1pzf2wlat97n7rykrk7e8g8nxste6hde0r8jqsy");
+    });
+  });
+});
diff --git a/packages/amino/src/addresses.ts b/packages/amino/src/addresses.ts
new file mode 100644
index 00000000..133f8f8b
--- /dev/null
+++ b/packages/amino/src/addresses.ts
@@ -0,0 +1,38 @@
+// See https://github.com/tendermint/tendermint/blob/f2ada0a604b4c0763bda2f64fac53d506d3beca7/docs/spec/blockchain/encoding.md#public-key-cryptography
+
+import { ripemd160, sha256 } from "@cosmjs/crypto";
+import { Bech32, fromBase64 } from "@cosmjs/encoding";
+
+import { encodeAminoPubkey } from "./encoding";
+import { isEd25519Pubkey, isMultisigThresholdPubkey, isSecp256k1Pubkey, Pubkey } from "./pubkeys";
+
+export function rawSecp256k1PubkeyToRawAddress(pubkeyData: Uint8Array): Uint8Array {
+  if (pubkeyData.length !== 33) {
+    throw new Error(`Invalid Secp256k1 pubkey length (compressed): ${pubkeyData.length}`);
+  }
+  return ripemd160(sha256(pubkeyData));
+}
+
+// For secp256k1 this assumes we already have a compressed pubkey.
+export function pubkeyToRawAddress(pubkey: Pubkey): Uint8Array {
+  if (isSecp256k1Pubkey(pubkey)) {
+    const pubkeyData = fromBase64(pubkey.value);
+    return rawSecp256k1PubkeyToRawAddress(pubkeyData);
+  } else if (isEd25519Pubkey(pubkey)) {
+    const pubkeyData = fromBase64(pubkey.value);
+    if (pubkeyData.length !== 32) {
+      throw new Error(`Invalid Ed25519 pubkey length: ${pubkeyData.length}`);
+    }
+    return sha256(pubkeyData).slice(0, 20);
+  } else if (isMultisigThresholdPubkey(pubkey)) {
+    // https://github.com/tendermint/tendermint/blob/38b401657e4ad7a7eeb3c30a3cbf512037df3740/crypto/multisig/threshold_pubkey.go#L71-L74
+    const pubkeyData = encodeAminoPubkey(pubkey);
+    return sha256(pubkeyData).slice(0, 20);
+  } else {
+    throw new Error("Unsupported public key type");
+  }
+}
+
+export function pubkeyToAddress(pubkey: Pubkey, prefix: string): string {
+  return Bech32.encode(prefix, pubkeyToRawAddress(pubkey));
+}
diff --git a/packages/amino/src/encoding.spec.ts b/packages/amino/src/encoding.spec.ts
new file mode 100644
index 00000000..e497d84c
--- /dev/null
+++ b/packages/amino/src/encoding.spec.ts
@@ -0,0 +1,163 @@
+import { Bech32, fromBase64 } from "@cosmjs/encoding";
+
+import {
+  decodeAminoPubkey,
+  decodeBech32Pubkey,
+  encodeAminoPubkey,
+  encodeBech32Pubkey,
+  encodeSecp256k1Pubkey,
+} from "./encoding";
+import { Pubkey } from "./pubkeys";
+import {
+  testgroup1,
+  testgroup1Address,
+  testgroup2,
+  testgroup2Address,
+  testgroup3,
+  testgroup3Address,
+  testgroup4,
+  testgroup4Address,
+} from "./testutils.spec";
+
+describe("encoding", () => {
+  describe("encodeSecp256k1Pubkey", () => {
+    it("encodes a compressed pubkey", () => {
+      const pubkey = fromBase64("AtQaCqFnshaZQp6rIkvAPyzThvCvXSDO+9AzbxVErqJP");
+      expect(encodeSecp256k1Pubkey(pubkey)).toEqual({
+        type: "tendermint/PubKeySecp256k1",
+        value: "AtQaCqFnshaZQp6rIkvAPyzThvCvXSDO+9AzbxVErqJP",
+      });
+    });
+
+    it("throws for uncompressed public keys", () => {
+      const pubkey = fromBase64(
+        "BE8EGB7ro1ORuFhjOnZcSgwYlpe0DSFjVNUIkNNQxwKQE7WHpoHoNswYeoFkuYpYSKK4mzFzMV/dB0DVAy4lnNU=",
+      );
+      expect(() => encodeSecp256k1Pubkey(pubkey)).toThrowError(/public key must be compressed secp256k1/i);
+    });
+  });
+
+  describe("decodeAminoPubkey", () => {
+    it("works for secp256k1", () => {
+      const amino = Bech32.decode(
+        "cosmospub1addwnpepqd8sgxq7aw348ydctp3n5ajufgxp395hksxjzc6565yfp56scupfqhlgyg5",
+      ).data;
+      expect(decodeAminoPubkey(amino)).toEqual({
+        type: "tendermint/PubKeySecp256k1",
+        value: "A08EGB7ro1ORuFhjOnZcSgwYlpe0DSFjVNUIkNNQxwKQ",
+      });
+    });
+
+    it("works for ed25519", () => {
+      // Encoded from `corald tendermint show-validator`
+      // Decoded from http://localhost:26657/validators
+      const amino = Bech32.decode(
+        "coralvalconspub1zcjduepqvxg72ccnl9r65fv0wn3amlk4sfzqfe2k36l073kjx2qyaf6sk23qw7j8wq",
+      ).data;
+      expect(decodeAminoPubkey(amino)).toEqual({
+        type: "tendermint/PubKeyEd25519",
+        value: "YZHlYxP5R6olj3Tj3f7VgkQE5VaOvv9G0jKATqdQsqI=",
+      });
+    });
+
+    it("works for sr25519", () => {
+      pending("No test data available");
+    });
+  });
+
+  describe("decodeBech32Pubkey", () => {
+    it("works", () => {
+      expect(
+        decodeBech32Pubkey("cosmospub1addwnpepqd8sgxq7aw348ydctp3n5ajufgxp395hksxjzc6565yfp56scupfqhlgyg5"),
+      ).toEqual({
+        type: "tendermint/PubKeySecp256k1",
+        value: "A08EGB7ro1ORuFhjOnZcSgwYlpe0DSFjVNUIkNNQxwKQ",
+      });
+    });
+
+    it("works for enigma pubkey", () => {
+      expect(
+        decodeBech32Pubkey("enigmapub1addwnpepqw5k9p439nw0zpg2aundx4umwx4nw233z5prpjqjv5anl5grmnchzp2xwvv"),
+      ).toEqual({
+        type: "tendermint/PubKeySecp256k1",
+        value: "A6lihrEs3PEFCu8m01ebcas3KjEVAjDIEmU7P9ED3PFx",
+      });
+    });
+
+    it("works for ed25519", () => {
+      // Encoded from `corald tendermint show-validator`
+      // Decoded from http://localhost:26657/validators
+      const decoded = decodeBech32Pubkey(
+        "coralvalconspub1zcjduepqvxg72ccnl9r65fv0wn3amlk4sfzqfe2k36l073kjx2qyaf6sk23qw7j8wq",
+      );
+      expect(decoded).toEqual({
+        type: "tendermint/PubKeyEd25519",
+        value: "YZHlYxP5R6olj3Tj3f7VgkQE5VaOvv9G0jKATqdQsqI=",
+      });
+    });
+  });
+
+  describe("encodeAminoPubkey", () => {
+    it("works for secp256k1", () => {
+      const pubkey: Pubkey = {
+        type: "tendermint/PubKeySecp256k1",
+        value: "A08EGB7ro1ORuFhjOnZcSgwYlpe0DSFjVNUIkNNQxwKQ",
+      };
+      const expected = Bech32.decode(
+        "cosmospub1addwnpepqd8sgxq7aw348ydctp3n5ajufgxp395hksxjzc6565yfp56scupfqhlgyg5",
+      ).data;
+      expect(encodeAminoPubkey(pubkey)).toEqual(expected);
+    });
+
+    it("works for ed25519", () => {
+      // Decoded from http://localhost:26657/validators
+      // Encoded from `corald tendermint show-validator`
+      const pubkey: Pubkey = {
+        type: "tendermint/PubKeyEd25519",
+        value: "YZHlYxP5R6olj3Tj3f7VgkQE5VaOvv9G0jKATqdQsqI=",
+      };
+      const expected = Bech32.decode(
+        "coralvalconspub1zcjduepqvxg72ccnl9r65fv0wn3amlk4sfzqfe2k36l073kjx2qyaf6sk23qw7j8wq",
+      ).data;
+      expect(encodeAminoPubkey(pubkey)).toEqual(expected);
+    });
+  });
+
+  describe("encodeBech32Pubkey", () => {
+    it("works for secp256k1", () => {
+      const pubkey: Pubkey = {
+        type: "tendermint/PubKeySecp256k1",
+        value: "A08EGB7ro1ORuFhjOnZcSgwYlpe0DSFjVNUIkNNQxwKQ",
+      };
+      expect(encodeBech32Pubkey(pubkey, "cosmospub")).toEqual(
+        "cosmospub1addwnpepqd8sgxq7aw348ydctp3n5ajufgxp395hksxjzc6565yfp56scupfqhlgyg5",
+      );
+    });
+
+    it("works for ed25519", () => {
+      // Decoded from http://localhost:26657/validators
+      // Encoded from `corald tendermint show-validator`
+      const pubkey: Pubkey = {
+        type: "tendermint/PubKeyEd25519",
+        value: "YZHlYxP5R6olj3Tj3f7VgkQE5VaOvv9G0jKATqdQsqI=",
+      };
+      expect(encodeBech32Pubkey(pubkey, "coralvalconspub")).toEqual(
+        "coralvalconspub1zcjduepqvxg72ccnl9r65fv0wn3amlk4sfzqfe2k36l073kjx2qyaf6sk23qw7j8wq",
+      );
+    });
+
+    it("works for multisig", () => {
+      const expected1 = Bech32.decode(testgroup1Address).data;
+      expect(encodeAminoPubkey(testgroup1)).toEqual(expected1);
+
+      const expected2 = Bech32.decode(testgroup2Address).data;
+      expect(encodeAminoPubkey(testgroup2)).toEqual(expected2);
+
+      const expected3 = Bech32.decode(testgroup3Address).data;
+      expect(encodeAminoPubkey(testgroup3)).toEqual(expected3);
+
+      const expected4 = Bech32.decode(testgroup4Address).data;
+      expect(encodeAminoPubkey(testgroup4)).toEqual(expected4);
+    });
+  });
+});
diff --git a/packages/amino/src/encoding.ts b/packages/amino/src/encoding.ts
new file mode 100644
index 00000000..79b0e4ab
--- /dev/null
+++ b/packages/amino/src/encoding.ts
@@ -0,0 +1,127 @@
+import { Bech32, fromBase64, fromHex, toBase64, toHex } from "@cosmjs/encoding";
+import { Uint53 } from "@cosmjs/math";
+import { arrayContentStartsWith } from "@cosmjs/utils";
+
+import {
+  isEd25519Pubkey,
+  isMultisigThresholdPubkey,
+  isSecp256k1Pubkey,
+  Pubkey,
+  pubkeyType,
+  Secp256k1Pubkey,
+} from "./pubkeys";
+
+export function encodeSecp256k1Pubkey(pubkey: Uint8Array): Secp256k1Pubkey {
+  if (pubkey.length !== 33 || (pubkey[0] !== 0x02 && pubkey[0] !== 0x03)) {
+    throw new Error("Public key must be compressed secp256k1, i.e. 33 bytes starting with 0x02 or 0x03");
+  }
+  return {
+    type: pubkeyType.secp256k1,
+    value: toBase64(pubkey),
+  };
+}
+
+// As discussed in https://github.com/binance-chain/javascript-sdk/issues/163
+// Prefixes listed here: https://github.com/tendermint/tendermint/blob/d419fffe18531317c28c29a292ad7d253f6cafdf/docs/spec/blockchain/encoding.md#public-key-cryptography
+// Last bytes is varint-encoded length prefix
+const pubkeyAminoPrefixSecp256k1 = fromHex("eb5ae987" + "21" /* fixed length */);
+const pubkeyAminoPrefixEd25519 = fromHex("1624de64" + "20" /* fixed length */);
+const pubkeyAminoPrefixSr25519 = fromHex("0dfb1005" + "20" /* fixed length */);
+/** See https://github.com/tendermint/tendermint/commit/38b401657e4ad7a7eeb3c30a3cbf512037df3740 */
+const pubkeyAminoPrefixMultisigThreshold = fromHex("22c1f7e2" /* variable length not included */);
+
+/**
+ * Decodes a pubkey in the Amino binary format to a type/value object.
+ */
+export function decodeAminoPubkey(data: Uint8Array): Pubkey {
+  if (arrayContentStartsWith(data, pubkeyAminoPrefixSecp256k1)) {
+    const rest = data.slice(pubkeyAminoPrefixSecp256k1.length);
+    if (rest.length !== 33) {
+      throw new Error("Invalid rest data length. Expected 33 bytes (compressed secp256k1 pubkey).");
+    }
+    return {
+      type: pubkeyType.secp256k1,
+      value: toBase64(rest),
+    };
+  } else if (arrayContentStartsWith(data, pubkeyAminoPrefixEd25519)) {
+    const rest = data.slice(pubkeyAminoPrefixEd25519.length);
+    if (rest.length !== 32) {
+      throw new Error("Invalid rest data length. Expected 32 bytes (Ed25519 pubkey).");
+    }
+    return {
+      type: pubkeyType.ed25519,
+      value: toBase64(rest),
+    };
+  } else if (arrayContentStartsWith(data, pubkeyAminoPrefixSr25519)) {
+    const rest = data.slice(pubkeyAminoPrefixSr25519.length);
+    if (rest.length !== 32) {
+      throw new Error("Invalid rest data length. Expected 32 bytes (Sr25519 pubkey).");
+    }
+    return {
+      type: pubkeyType.sr25519,
+      value: toBase64(rest),
+    };
+  } else {
+    throw new Error("Unsupported public key type. Amino data starts with: " + toHex(data.slice(0, 5)));
+  }
+}
+
+/**
+ * Decodes a bech32 pubkey to Amino binary, which is then decoded to a type/value object.
+ * The bech32 prefix is ignored and discareded.
+ *
+ * @param bechEncoded the bech32 encoded pubkey
+ */
+export function decodeBech32Pubkey(bechEncoded: string): Pubkey {
+  const { data } = Bech32.decode(bechEncoded);
+  return decodeAminoPubkey(data);
+}
+
+/**
+ * Uvarint encoder for Amino. This is the same encoding as `binary.PutUvarint` from the Go
+ * standard library.
+ *
+ * @see https://github.com/tendermint/go-amino/blob/8e779b71f40d175/encoder.go#L77-L85
+ */
+function encodeUvarint(value: number | string): number[] {
+  const checked = Uint53.fromString(value.toString()).toNumber();
+  if (checked > 127) {
+    throw new Error(
+      "Encoding numbers > 127 is not supported here. Please tell those lazy CosmJS maintainers to port the binary.PutUvarint implementation from the Go standard library and write some tests.",
+    );
+  }
+  return [checked];
+}
+
+/**
+ * Encodes a public key to binary Amino.
+ */
+export function encodeAminoPubkey(pubkey: Pubkey): Uint8Array {
+  if (isMultisigThresholdPubkey(pubkey)) {
+    const out = Array.from(pubkeyAminoPrefixMultisigThreshold);
+    out.push(0x08); // TODO: What is this?
+    out.push(...encodeUvarint(pubkey.value.threshold));
+    for (const pubkeyData of pubkey.value.pubkeys.map((p) => encodeAminoPubkey(p))) {
+      out.push(0x12); // TODO: What is this?
+      out.push(...encodeUvarint(pubkeyData.length));
+      out.push(...pubkeyData);
+    }
+    return new Uint8Array(out);
+  } else if (isEd25519Pubkey(pubkey)) {
+    return new Uint8Array([...pubkeyAminoPrefixEd25519, ...fromBase64(pubkey.value)]);
+  } else if (isSecp256k1Pubkey(pubkey)) {
+    return new Uint8Array([...pubkeyAminoPrefixSecp256k1, ...fromBase64(pubkey.value)]);
+  } else {
+    throw new Error("Unsupported pubkey type");
+  }
+}
+
+/**
+ * Encodes a public key to binary Amino and then to bech32.
+ *
+ * @param pubkey the public key to encode
+ * @param prefix the bech32 prefix (human readable part)
+ */
+export function encodeBech32Pubkey(pubkey: Pubkey, prefix: string): string {
+  return Bech32.encode(prefix, encodeAminoPubkey(pubkey));
+}
diff --git a/packages/amino/src/index.ts b/packages/amino/src/index.ts
new file mode 100644
index 00000000..28b4d9e5
--- /dev/null
+++ b/packages/amino/src/index.ts
@@ -0,0 +1,21 @@
+export { pubkeyToAddress, pubkeyToRawAddress, rawSecp256k1PubkeyToRawAddress } from "./addresses";
+export {
+  decodeAminoPubkey,
+  decodeBech32Pubkey,
+  encodeAminoPubkey,
+  encodeBech32Pubkey,
+  encodeSecp256k1Pubkey,
+} from "./encoding";
+export {
+  MultisigThresholdPubkey,
+  Pubkey,
+  Ed25519Pubkey,
+  Secp256k1Pubkey,
+  SinglePubkey,
+  isMultisigThresholdPubkey,
+  isEd25519Pubkey,
+  isSecp256k1Pubkey,
+  isSinglePubkey,
+  pubkeyType,
+} from "./pubkeys";
+export { createMultisigThresholdPubkey } from "./multisig";
diff --git a/packages/amino/src/multisig.spec.ts b/packages/amino/src/multisig.spec.ts
new file mode 100644
index 00000000..42bd1869
--- /dev/null
+++ b/packages/amino/src/multisig.spec.ts
@@ -0,0 +1,84 @@
+import { compareArrays, createMultisigThresholdPubkey } from "./multisig";
+import { test1, test2, test3, testgroup1, testgroup2, testgroup3, testgroup4 } from "./testutils.spec";
+
+describe("multisig", () => {
+  describe("compareArrays", () => {
+    it("return 0 for equal arrays", () => {
+      expect(compareArrays(new Uint8Array([]), new Uint8Array([]))).toEqual(0);
+      expect(compareArrays(new Uint8Array([1]), new Uint8Array([1]))).toEqual(0);
+      expect(compareArrays(new Uint8Array([3, 2, 1]), new Uint8Array([3, 2, 1]))).toEqual(0);
+    });
+
+    it("return > 0 for left > right", () => {
+      expect(compareArrays(new Uint8Array([5, 5, 5]), new Uint8Array([5, 5, 4]))).toBeGreaterThan(0);
+      expect(compareArrays(new Uint8Array([5, 5, 5]), new Uint8Array([5, 4, 5]))).toBeGreaterThan(0);
+      expect(compareArrays(new Uint8Array([5, 5, 5]), new Uint8Array([4, 5, 5]))).toBeGreaterThan(0);
+      expect(compareArrays(new Uint8Array([5, 5, 5]), new Uint8Array([5, 5]))).toBeGreaterThan(0);
+      expect(compareArrays(new Uint8Array([5, 5, 5]), new Uint8Array([5]))).toBeGreaterThan(0);
+      expect(compareArrays(new Uint8Array([5, 5, 5]), new Uint8Array([]))).toBeGreaterThan(0);
+
+      // left or right precedence
+      expect(compareArrays(new Uint8Array([5, 5, 4]), new Uint8Array([4, 5, 5]))).toBeGreaterThan(0);
+
+      // magnitude is more important than length
+      expect(compareArrays(new Uint8Array([6]), new Uint8Array([5, 5]))).toBeGreaterThan(0);
+    });
+
+    it("return < 0 for left < right", () => {
+      expect(compareArrays(new Uint8Array([5, 5, 4]), new Uint8Array([5, 5, 5]))).toBeLessThan(0);
+      expect(compareArrays(new Uint8Array([5, 4, 5]), new Uint8Array([5, 5, 5]))).toBeLessThan(0);
+      expect(compareArrays(new Uint8Array([4, 5, 5]), new Uint8Array([5, 5, 5]))).toBeLessThan(0);
+      expect(compareArrays(new Uint8Array([5, 5]), new Uint8Array([5, 5, 5]))).toBeLessThan(0);
+      expect(compareArrays(new Uint8Array([5]), new Uint8Array([5, 5, 5]))).toBeLessThan(0);
+      expect(compareArrays(new Uint8Array([]), new Uint8Array([5, 5, 5]))).toBeLessThan(0);
+
+      // left or right precedence
+      expect(compareArrays(new Uint8Array([4, 5, 5]), new Uint8Array([5, 5, 4]))).toBeLessThan(0);
+
+      // magnitude is more important than length
+      expect(compareArrays(new Uint8Array([5, 5]), new Uint8Array([6]))).toBeLessThan(0);
+    });
+
+    it("can be used with sort", () => {
+      const values = [
+        new Uint8Array([2]),
+        new Uint8Array([1]),
+        new Uint8Array([2, 5]),
+        new Uint8Array([3]),
+        new Uint8Array([]),
+      ].sort(compareArrays);
+      expect(values).toEqual([
+        new Uint8Array([]),
+        new Uint8Array([1]),
+        new Uint8Array([2]),
+        new Uint8Array([2, 5]),
+        new Uint8Array([3]),
+      ]);
+    });
+  });
+
+  describe("MultisigThresholdPubkey", () => {
+    it("works with sorting", () => {
+      expect(createMultisigThresholdPubkey([test1, test2, test3], 2)).toEqual(testgroup1);
+      expect(createMultisigThresholdPubkey([test1, test2, test3], 1)).toEqual(testgroup2);
+      expect(createMultisigThresholdPubkey([test3, test1], 2)).toEqual(testgroup3);
+
+      expect(createMultisigThresholdPubkey([test1, test2, test3], 2, false)).toEqual(testgroup1);
+      expect(createMultisigThresholdPubkey([test1, test2, test3], 1, false)).toEqual(testgroup2);
+      expect(createMultisigThresholdPubkey([test3, test1], 2, false)).toEqual(testgroup3);
+    });
+
+    it("works with nosort", () => {
+      expect(createMultisigThresholdPubkey([test3, test1], 2, true)).toEqual(testgroup4);
+    });
+
+    it("throws for threshold larger than number of keys", () => {
+      expect(() => createMultisigThresholdPubkey([test1, test2, test3], 4)).toThrowError(
+        /threshold k = 4 exceeds number of keys n = 3/i,
+      );
+      expect(() => createMultisigThresholdPubkey([test1, test2, test3], 75)).toThrowError(
+        /threshold k = 75 exceeds number of keys n = 3/i,
+      );
+    });
+  });
+});
diff --git a/packages/amino/src/multisig.ts b/packages/amino/src/multisig.ts
new file mode 100644
index 00000000..7e8ecc5a
--- /dev/null
+++ b/packages/amino/src/multisig.ts
@@ -0,0 +1,45 @@
+import { toHex } from "@cosmjs/encoding";
+import { Uint53 } from "@cosmjs/math";
+
+import { pubkeyToRawAddress } from "./addresses";
+import { MultisigThresholdPubkey, SinglePubkey } from "./pubkeys";
+
+/**
+ * Compare arrays lexicographically.
+ *
+ * Returns value < 0 if `a < b`.
+ * Returns value > 0 if `a > b`.
+ * Returns 0 if `a === b`.
+ */
+export function compareArrays(a: Uint8Array, b: Uint8Array): number {
+  const aHex = toHex(a);
+  const bHex = toHex(b);
+  return aHex === bHex ? 0 : aHex < bHex ? -1 : 1;
+}
+
+export function createMultisigThresholdPubkey(
+  pubkeys: readonly SinglePubkey[],
+  threshold: number,
+  nosort = false,
+): MultisigThresholdPubkey {
+  const uintThreshold = new Uint53(threshold);
+  if (uintThreshold.toNumber() > pubkeys.length) {
+    throw new Error(`Threshold k = ${uintThreshold.toNumber()} exceeds number of keys n = ${pubkeys.length}`);
+  }
+
+  const outPubkeys = nosort
+    ? pubkeys
+    : Array.from(pubkeys).sort((lhs, rhs) => {
+        // https://github.com/cosmos/cosmos-sdk/blob/v0.42.2/client/keys/add.go#L172-L174
+        const addressLhs = pubkeyToRawAddress(lhs);
+        const addressRhs = pubkeyToRawAddress(rhs);
+        return compareArrays(addressLhs, addressRhs);
+      });
+  return {
+    type: "tendermint/PubKeyMultisigThreshold",
+    value: {
+      threshold: uintThreshold.toString(),
+      pubkeys: outPubkeys,
+    },
+  };
+}
diff --git a/packages/amino/src/pubkeys.spec.ts b/packages/amino/src/pubkeys.spec.ts
new file mode 100644
index 00000000..ec47bdcb
--- /dev/null
+++ b/packages/amino/src/pubkeys.spec.ts
@@ -0,0 +1,52 @@
+import { isMultisigThresholdPubkey, isSinglePubkey } from "./pubkeys";
+
+describe("pubkeys", () => {
+  const pubkeyEd25519 = {
+    type: "tendermint/PubKeyEd25519",
+    value: "YZHlYxP5R6olj3Tj3f7VgkQE5VaOvv9G0jKATqdQsqI=",
+  };
+  const pubkeySecp256k1 = {
+    type: "tendermint/PubKeySecp256k1",
+    value: "AtQaCqFnshaZQp6rIkvAPyzThvCvXSDO+9AzbxVErqJP",
+  };
+  const pubkeyMultisigThreshold = {
+    type: "tendermint/PubKeyMultisigThreshold",
+    value: {
+      threshold: "3",
+      pubkeys: [
+        {
+          type: "tendermint/PubKeySecp256k1",
+          value: "A4KZH7VSRwW/6RTExROivRYKsQP63LnGcBlXFo+eKGpQ",
+        },
+        {
+          type: "tendermint/PubKeySecp256k1",
+          value: "A8/Cq4VigOnDgl6RSdcx97fjrdCo/qwAX6C34n7ZDZLs",
+        },
+        {
+          type: "tendermint/PubKeySecp256k1",
+          value: "ApKgZuwy03xgdRnXqG6yEHATomsWDOPacy7nbpsuUCSS",
+        },
+        {
+          type: "tendermint/PubKeySecp256k1",
+          value: "Aptm8E3WSSFS0RTAIUW+bLi/slYnTEE+h4qPTG28CHfq",
+        },
+      ],
+    },
+  };
+
+  describe("isSinglePubkey", () => {
+    it("works", () => {
+      expect(isSinglePubkey(pubkeyEd25519)).toEqual(true);
+      expect(isSinglePubkey(pubkeySecp256k1)).toEqual(true);
+      expect(isSinglePubkey(pubkeyMultisigThreshold)).toEqual(false);
+    });
+  });
+
+  describe("isMultisigThresholdPubkey", () => {
+    it("works", () => {
+      expect(isMultisigThresholdPubkey(pubkeyEd25519)).toEqual(false);
+      expect(isMultisigThresholdPubkey(pubkeySecp256k1)).toEqual(false);
+      expect(isMultisigThresholdPubkey(pubkeyMultisigThreshold)).toEqual(true);
+    });
+  });
+});
diff --git a/packages/amino/src/pubkeys.ts b/packages/amino/src/pubkeys.ts
new file mode 100644
index 00000000..d61bfa3c
--- /dev/null
+++ b/packages/amino/src/pubkeys.ts
@@ -0,0 +1,71 @@
+export interface Pubkey {
+  // type is one of the strings defined in pubkeyType
+  // I don't use a string literal union here as that makes trouble with json test data:
+  // https://github.com/cosmos/cosmjs/pull/44#pullrequestreview-353280504
+  readonly type: string;
+  readonly value: any;
+}
+
+export interface Ed25519Pubkey extends SinglePubkey {
+  readonly type: "tendermint/PubKeyEd25519";
+  readonly value: string;
+}
+
+export function isEd25519Pubkey(pubkey: Pubkey): pubkey is Ed25519Pubkey {
+  return (pubkey as Ed25519Pubkey).type === "tendermint/PubKeyEd25519";
+}
+
+export interface Secp256k1Pubkey extends SinglePubkey {
+  readonly type: "tendermint/PubKeySecp256k1";
+  readonly value: string;
+}
+
+export function isSecp256k1Pubkey(pubkey: Pubkey): pubkey is Secp256k1Pubkey {
+  return (pubkey as Secp256k1Pubkey).type === "tendermint/PubKeySecp256k1";
+}
+
+export const pubkeyType = {
+  /** @see https://github.com/tendermint/tendermint/blob/v0.33.0/crypto/ed25519/ed25519.go#L22 */
+  secp256k1: "tendermint/PubKeySecp256k1" as const,
+  /** @see https://github.com/tendermint/tendermint/blob/v0.33.0/crypto/secp256k1/secp256k1.go#L23 */
+  ed25519: "tendermint/PubKeyEd25519" as const,
+  /** @see https://github.com/tendermint/tendermint/blob/v0.33.0/crypto/sr25519/codec.go#L12 */
+  sr25519: "tendermint/PubKeySr25519" as const,
+  multisigThreshold: "tendermint/PubKeyMultisigThreshold" as const,
+};
+
+/**
+ * A pubkey which contains the data directly without further nesting.
+ *
+ * You can think of this as a non-multisig pubkey.
+ */
+export interface SinglePubkey extends Pubkey {
+  // type is one of the strings defined in pubkeyType
+  // I don't use a string literal union here as that makes trouble with json test data:
+  // https://github.com/cosmos/cosmjs/pull/44#pullrequestreview-353280504
+  readonly type: string;
+  /**
+   * The base64 encoding of the Amino binary encoded pubkey.
+   *
+   * Note: if type is Secp256k1, this must contain a 33 bytes compressed pubkey.
+   */
+  readonly value: string;
+}
+
+export function isSinglePubkey(pubkey: Pubkey): pubkey is SinglePubkey {
+  const singPubkeyTypes: string[] = [pubkeyType.ed25519, pubkeyType.secp256k1, pubkeyType.sr25519];
+  return singPubkeyTypes.includes(pubkey.type);
+}
+
+export interface MultisigThresholdPubkey extends Pubkey {
+  readonly type: "tendermint/PubKeyMultisigThreshold";
+  readonly value: {
+    /** A string-encoded integer */
+    readonly threshold: string;
+    readonly pubkeys: readonly SinglePubkey[];
+  };
+}
+
+export function isMultisigThresholdPubkey(pubkey: Pubkey): pubkey is MultisigThresholdPubkey {
+  return (pubkey as MultisigThresholdPubkey).type === "tendermint/PubKeyMultisigThreshold";
+}
diff --git a/packages/amino/src/testutils.spec.ts b/packages/amino/src/testutils.spec.ts
new file mode 100644
index 00000000..36cbc26d
--- /dev/null
+++ b/packages/amino/src/testutils.spec.ts
@@ -0,0 +1,73 @@
+import { decodeBech32Pubkey } from "./encoding";
+import { MultisigThresholdPubkey } from "./pubkeys";
+
+// ./build/wasmd keys add test1
+// ./build/wasmd keys add test2
+// ./build/wasmd keys add test3
+// ./build/wasmd keys add testgroup1 --multisig=test1,test2,test3 --multisig-threshold 2
+// ./build/wasmd keys add testgroup2 --multisig=test1,test2,test3 --multisig-threshold 1
+// # By default pubkeys are sorted by its address data (https://github.com/cosmos/cosmos-sdk/blob/v0.42.2/client/keys/add.go#L172-L174)
+// ./build/wasmd keys add testgroup3 --multisig=test3,test1 --multisig-threshold 2
+// ./build/wasmd keys add testgroup4 --multisig=test3,test1 --nosort --multisig-threshold 2
+
+export const test1 = decodeBech32Pubkey(
+  "wasmpub1addwnpepqwxttx8w2sfs6d8cuzqcuau84grp8xsw95qzdjkmvc44tnckskdxw3zw2km",
+  // pubkey data: eb5ae98721038cb598ee54130d34f8e0818e7787aa06139a0e2d0026cadb662b55cf16859a67
+  // address: wasm1jq59w7y34msq69g4w3zvq6d5h3stcajd8g62xm
+  // address data: 9028577891aee00d15157444c069b4bc60bc764d
+);
+export const test2 = decodeBech32Pubkey(
+  "wasmpub1addwnpepq2gx7x7e29kge5a4ycunytyqr0u8ynql5h583s8r9wdads9m3v8ks6y0nhc",
+  // pubkey data: eb5ae9872102906f1bd9516c8cd3b52639322c801bf8724c1fa5e878c0e32b9bd6c0bb8b0f68
+  // address: wasm146e52j6zphxw8m67cz8860ad5uju892cqmawsg
+  // address data: aeb3454b420dcce3ef5ec08e7d3fada725c39558
+);
+export const test3 = decodeBech32Pubkey(
+  "wasmpub1addwnpepq0xfx5vavxmgdkn0p6x0l9p3udttghu3qcldd7ql08wa3xy93qq0xuzvtxc",
+  // pubkey data: eb5ae9872103cc93519d61b686da6f0e8cff9431e356b45f91063ed6f81f79ddd898858800f3
+  // address: wasm1a6uxr25mw8qg8zz3l2avsdjsveh4yg9sw7h5np
+  // address data: eeb861aa9b71c0838851fabac83650666f5220b0
+);
+
+// 2/3 multisig
+export const testgroup1: MultisigThresholdPubkey = {
+  type: "tendermint/PubKeyMultisigThreshold",
+  value: {
+    threshold: "2",
+    pubkeys: [test1, test2, test3],
+  },
+};
+export const testgroup1Address =
+  "wasmpub1ytql0csgqgfzd666axrjzquvkkvwu4qnp5603cyp3emc02sxzwdqutgqym9dke3t2h83dpv6vufzd666axrjzq5sdudaj5tv3nfm2f3exgkgqxlcwfxplf0g0rqwx2um6mqthzc0dqfzd666axrjzq7vjdge6cdksmdx7r5vl72rrc6kk30ezp376mup77wamzvgtzqq7v7aysdd";
+
+export const testgroup2: MultisigThresholdPubkey = {
+  type: "tendermint/PubKeyMultisigThreshold",
+  value: {
+    threshold: "1",
+    pubkeys: [test1, test2, test3],
+  },
+};
+export const testgroup2Address =
+  "wasmpub1ytql0csgqyfzd666axrjzquvkkvwu4qnp5603cyp3emc02sxzwdqutgqym9dke3t2h83dpv6vufzd666axrjzq5sdudaj5tv3nfm2f3exgkgqxlcwfxplf0g0rqwx2um6mqthzc0dqfzd666axrjzq7vjdge6cdksmdx7r5vl72rrc6kk30ezp376mup77wamzvgtzqq7vc4ejke";
+
+// 2/2 multisig
+export const testgroup3: MultisigThresholdPubkey = {
+  type: "tendermint/PubKeyMultisigThreshold",
+  value: {
+    threshold: "2",
+    pubkeys: [test1, test3],
+  },
+};
+export const testgroup3Address =
+  "wasmpub1ytql0csgqgfzd666axrjzquvkkvwu4qnp5603cyp3emc02sxzwdqutgqym9dke3t2h83dpv6vufzd666axrjzq7vjdge6cdksmdx7r5vl72rrc6kk30ezp376mup77wamzvgtzqq7vzjhugu";
+
+// 2/2 multisig with custom sorting
+export const testgroup4: MultisigThresholdPubkey = {
+  type: "tendermint/PubKeyMultisigThreshold",
+  value: {
+    threshold: "2",
+    pubkeys: [test3, test1],
+  },
+};
+export const testgroup4Address =
+  "wasmpub1ytql0csgqgfzd666axrjzq7vjdge6cdksmdx7r5vl72rrc6kk30ezp376mup77wamzvgtzqq7vfzd666axrjzquvkkvwu4qnp5603cyp3emc02sxzwdqutgqym9dke3t2h83dpv6vujvg56k";
diff --git a/packages/amino/tsconfig.json b/packages/amino/tsconfig.json
new file mode 100644
index 00000000..df66add1
--- /dev/null
+++ b/packages/amino/tsconfig.json
@@ -0,0 +1,11 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "baseUrl": ".",
+    "outDir": "build",
+    "rootDir": "src"
+  },
+  "include": [
+    "src/**/*"
+  ]
+}
diff --git a/packages/amino/typedoc.js b/packages/amino/typedoc.js
new file mode 100644
index 00000000..ffe4be64
--- /dev/null
+++ b/packages/amino/typedoc.js
@@ -0,0 +1,11 @@
+const packageJson = require("./package.json");
+
+module.exports = {
+  entryPoints: ["./src"],
+  out: "docs",
+  exclude: "**/*.spec.ts",
+  name: `${packageJson.name} Documentation`,
+  readme: "README.md",
+  excludeExternals: true,
+  excludePrivate: true,
+};
diff --git a/packages/amino/webpack.web.config.js b/packages/amino/webpack.web.config.js
new file mode 100644
index 00000000..9d5836a8
--- /dev/null
+++ b/packages/amino/webpack.web.config.js
@@ -0,0 +1,17 @@
+const glob = require("glob");
+const path = require("path");
+
+const target = "web";
+const distdir = path.join(__dirname, "dist", "web");
+
+module.exports = [
+  {
+    // bundle used for Karma tests
+    target: target,
+    entry: glob.sync("./build/**/*.spec.js"),
+    output: {
+      path: distdir,
+      filename: "tests.js",
+    },
+  },
+];
diff --git a/packages/cli/examples/multisig_address.ts b/packages/cli/examples/multisig_address.ts
new file mode 100644
index 00000000..94c37c1a
--- /dev/null
+++ b/packages/cli/examples/multisig_address.ts
@@ -0,0 +1,30 @@
+import { MultisigThresholdPubkey, pubkeyToAddress } from "@cosmjs/amino";
+
+// https://github.com/cosmos/cosmjs/issues/673#issuecomment-779847238
+const multisigPubkey: MultisigThresholdPubkey = {
+  "type": "tendermint/PubKeyMultisigThreshold",
+  "value": {
+    "threshold": "3",
+    "pubkeys": [
+      {
+        "type": "tendermint/PubKeySecp256k1",
+        "value": "A4KZH7VSRwW/6RTExROivRYKsQP63LnGcBlXFo+eKGpQ"
+      },
+      {
+        "type": "tendermint/PubKeySecp256k1",
+        "value": "A8/Cq4VigOnDgl6RSdcx97fjrdCo/qwAX6C34n7ZDZLs"
+      },
+      {
+        "type": "tendermint/PubKeySecp256k1",
+        "value": "ApKgZuwy03xgdRnXqG6yEHATomsWDOPacy7nbpsuUCSS"
+      },
+      {
+        "type": "tendermint/PubKeySecp256k1",
+        "value": "Aptm8E3WSSFS0RTAIUW+bLi/slYnTEE+h4qPTG28CHfq"
+      }
+    ]
+  }
+};
+
+const address = pubkeyToAddress(multisigPubkey, "cosmos");
+console.log(address);
diff --git a/packages/cli/package.json b/packages/cli/package.json
index 5949e477..7405f013 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -39,6 +39,7 @@
     "!**/testdata/"
   ],
   "dependencies": {
+    "@cosmjs/amino": "^0.25.0-alpha.0",
     "@cosmjs/cosmwasm-launchpad": "^0.25.0-alpha.0",
     "@cosmjs/cosmwasm-stargate": "^0.25.0-alpha.0",
     "@cosmjs/crypto": "^0.25.0-alpha.0",
diff --git a/packages/cli/run_examples.sh b/packages/cli/run_examples.sh
index fde36611..8ec0e10e 100755
--- a/packages/cli/run_examples.sh
+++ b/packages/cli/run_examples.sh
@@ -13,6 +13,7 @@ cosmwasm-cli --init examples/generate_address.ts --code "process.exit(0)"
 cosmwasm-cli --init examples/helpers.ts --code "process.exit(0)"
 cosmwasm-cli --init examples/local_faucet.ts --code "process.exit(0)"
 cosmwasm-cli --init examples/mask.ts --code "process.exit(0)"
+cosmwasm-cli --init examples/multisig_address.ts --code "process.exit(0)"
 if [ -n "${SIMAPP_ENABLED:-}" ]; then
   cosmwasm-cli --init examples/stargate.ts --code "process.exit(0)"
 fi
diff --git a/packages/cosmwasm-stargate/package.json b/packages/cosmwasm-stargate/package.json
index 8261f247..fa4945e3 100644
--- a/packages/cosmwasm-stargate/package.json
+++ b/packages/cosmwasm-stargate/package.json
@@ -42,6 +42,7 @@
     "postdefine-proto": "prettier --write \"src/codec/**/*.ts\""
   },
   "dependencies": {
+    "@cosmjs/amino": "^0.25.0-alpha.0",
     "@cosmjs/cosmwasm-launchpad": "^0.25.0-alpha.0",
     "@cosmjs/crypto": "^0.25.0-alpha.0",
     "@cosmjs/encoding": "^0.25.0-alpha.0",
diff --git a/packages/cosmwasm-stargate/src/signingcosmwasmclient.ts b/packages/cosmwasm-stargate/src/signingcosmwasmclient.ts
index e4d12d71..7b008c5e 100644
--- a/packages/cosmwasm-stargate/src/signingcosmwasmclient.ts
+++ b/packages/cosmwasm-stargate/src/signingcosmwasmclient.ts
@@ -1,4 +1,5 @@
 /* eslint-disable @typescript-eslint/naming-convention */
+import { encodeSecp256k1Pubkey } from "@cosmjs/amino";
 import {
   ChangeAdminResult,
   CosmWasmFeeTable,
@@ -16,7 +17,6 @@ import {
   buildFeeTable,
   Coin,
   CosmosFeeTable,
-  encodeSecp256k1Pubkey,
   GasLimits,
   GasPrice,
   logs,
diff --git a/packages/launchpad/package.json b/packages/launchpad/package.json
index 0c8a4bfa..d6ed8030 100644
--- a/packages/launchpad/package.json
+++ b/packages/launchpad/package.json
@@ -39,6 +39,7 @@
     "pack-web": "yarn build-or-skip && webpack --mode development --config webpack.web.config.js"
   },
   "dependencies": {
+    "@cosmjs/amino": "^0.25.0-alpha.0",
     "@cosmjs/crypto": "^0.25.0-alpha.0",
     "@cosmjs/encoding": "^0.25.0-alpha.0",
     "@cosmjs/math": "^0.25.0-alpha.0",
diff --git a/packages/launchpad/src/address.spec.ts b/packages/launchpad/src/address.spec.ts
deleted file mode 100644
index f5e3b627..00000000
--- a/packages/launchpad/src/address.spec.ts
+++ /dev/null
@@ -1,25 +0,0 @@
-import { fromHex, toBase64 } from "@cosmjs/encoding";
-
-import { pubkeyToAddress } from "./address";
-
-describe("address", () => {
-  describe("pubkeyToAddress", () => {
-    it("works for Secp256k1 compressed", () => {
-      const prefix = "cosmos";
-      const pubkey = {
-        type: "tendermint/PubKeySecp256k1",
-        value: "AtQaCqFnshaZQp6rIkvAPyzThvCvXSDO+9AzbxVErqJP",
-      };
-      expect(pubkeyToAddress(pubkey, prefix)).toEqual("cosmos1h806c7khnvmjlywdrkdgk2vrayy2mmvf9rxk2r");
-    });
-
-    it("works for Ed25519", () => {
-      const prefix = "cosmos";
-      const pubkey = {
-        type: "tendermint/PubKeyEd25519",
-        value: toBase64(fromHex("12ee6f581fe55673a1e9e1382a0829e32075a0aa4763c968bc526e1852e78c95")),
-      };
-      expect(pubkeyToAddress(pubkey, prefix)).toEqual("cosmos1pfq05em6sfkls66ut4m2257p7qwlk448h8mysz");
-    });
-  });
-});
diff --git a/packages/launchpad/src/address.ts b/packages/launchpad/src/address.ts
deleted file mode 100644
index 87fede26..00000000
--- a/packages/launchpad/src/address.ts
+++ /dev/null
@@ -1,40 +0,0 @@
-import { ripemd160, sha256 } from "@cosmjs/crypto";
-import { Bech32, fromBase64 } from "@cosmjs/encoding";
-
-import { PubKey, pubkeyType } from "./types";
-
-export function rawSecp256k1PubkeyToAddress(pubkeyRaw: Uint8Array, prefix: string): string {
-  if (pubkeyRaw.length !== 33) {
-    throw new Error(`Invalid Secp256k1 pubkey length (compressed): ${pubkeyRaw.length}`);
-  }
-  const hash1 = sha256(pubkeyRaw);
-  const hash2 = ripemd160(hash1);
-  return Bech32.encode(prefix, hash2);
-}
-
-// See https://github.com/tendermint/tendermint/blob/f2ada0a604b4c0763bda2f64fac53d506d3beca7/docs/spec/blockchain/encoding.md#public-key-cryptography
-// This assumes we already have a cosmos-compressed pubkey
-export function pubkeyToAddress(pubkey: PubKey, prefix: string): string {
-  const pubkeyBytes = fromBase64(pubkey.value);
-  switch (pubkey.type) {
-    case pubkeyType.secp256k1: {
-      return rawSecp256k1PubkeyToAddress(pubkeyBytes, prefix);
-    }
-    case pubkeyType.ed25519: {
-      if (pubkeyBytes.length !== 32) {
-        throw new Error(`Invalid Ed25519 pubkey length: ${pubkeyBytes.length}`);
-      }
-      const hash = sha256(pubkeyBytes);
-      return Bech32.encode(prefix, hash.slice(0, 20));
-    }
-    case pubkeyType.sr25519: {
-      if (pubkeyBytes.length !== 32) {
-        throw new Error(`Invalid Sr25519 pubkey length: ${pubkeyBytes.length}`);
-      }
-      const hash = sha256(pubkeyBytes);
-      return Bech32.encode(prefix, hash.slice(0, 20));
-    }
-    default:
-      throw new Error("Unrecognized public key algorithm");
-  }
-}
diff --git a/packages/launchpad/src/cosmosclient.ts b/packages/launchpad/src/cosmosclient.ts
index 79194bc9..9bb2764e 100644
--- a/packages/launchpad/src/cosmosclient.ts
+++ b/packages/launchpad/src/cosmosclient.ts
@@ -1,3 +1,4 @@
+import { Pubkey } from "@cosmjs/amino";
 import { sha256 } from "@cosmjs/crypto";
 import { fromBase64, fromHex, toHex } from "@cosmjs/encoding";
 import { Uint53 } from "@cosmjs/math";
@@ -13,7 +14,6 @@ import {
 } from "./lcdapi";
 import { Log, parseLogs } from "./logs";
 import { StdTx, WrappedStdTx } from "./tx";
-import { PubKey } from "./types";
 
 export interface GetSequenceResult {
   readonly accountNumber: number;
@@ -24,7 +24,7 @@ export interface Account {
   /** Bech32 account address */
   readonly address: string;
   readonly balance: readonly Coin[];
-  readonly pubkey: PubKey | undefined;
+  readonly pubkey: Pubkey | undefined;
   readonly accountNumber: number;
   readonly sequence: number;
 }
diff --git a/packages/launchpad/src/index.ts b/packages/launchpad/src/index.ts
index dc7a11d0..14db51fa 100644
--- a/packages/launchpad/src/index.ts
+++ b/packages/launchpad/src/index.ts
@@ -1,7 +1,20 @@
+// Re-exports for backwards compatibility
+export {
+  decodeAminoPubkey,
+  decodeBech32Pubkey,
+  encodeAminoPubkey,
+  encodeBech32Pubkey,
+  encodeSecp256k1Pubkey,
+  pubkeyToAddress,
+  pubkeyType,
+} from "@cosmjs/amino";
+import { SinglePubkey } from "@cosmjs/amino";
+/** @deprecated PubKey is deprecated. Use `SinglePubkey` or the more general `Pubkey` from `@cosmjs/amino`. */
+export type PubKey = SinglePubkey;
+
 import * as logs from "./logs";
 export { logs };
 
-export { pubkeyToAddress, rawSecp256k1PubkeyToAddress } from "./address";
 export { Coin, coin, coins, parseCoins } from "./coins";
 
 export {
@@ -125,19 +138,12 @@ export {
   MsgWithdrawValidatorCommission,
 } from "./msgs";
 export { makeCosmoshubPath } from "./paths";
-export {
-  decodeAminoPubkey,
-  decodeBech32Pubkey,
-  encodeAminoPubkey,
-  encodeBech32Pubkey,
-  encodeSecp256k1Pubkey,
-} from "./pubkey";
 export { findSequenceForSignedTx } from "./sequence";
 export { encodeSecp256k1Signature, decodeSignature } from "./signature";
 export { AccountData, Algo, AminoSignResponse, OfflineSigner } from "./signer";
 export { CosmosFeeTable, SigningCosmosClient } from "./signingcosmosclient";
 export { isStdTx, isWrappedStdTx, makeStdTx, CosmosSdkTx, StdTx, WrappedStdTx, WrappedTx } from "./tx";
-export { pubkeyType, PubKey, StdFee, StdSignature } from "./types";
+export { StdFee, StdSignature } from "./types";
 export { executeKdf, KdfConfiguration } from "./wallet";
 export { extractKdfConfiguration, Secp256k1HdWallet } from "./secp256k1hdwallet";
 export { Secp256k1Wallet } from "./secp256k1wallet";
diff --git a/packages/launchpad/src/lcdapi/auth.ts b/packages/launchpad/src/lcdapi/auth.ts
index 6b316466..947ff1da 100644
--- a/packages/launchpad/src/lcdapi/auth.ts
+++ b/packages/launchpad/src/lcdapi/auth.ts
@@ -1,6 +1,7 @@
 /* eslint-disable @typescript-eslint/naming-convention */
+import { Pubkey } from "@cosmjs/amino";
+
 import { Coin } from "../coins";
-import { PubKey } from "../types";
 import { LcdClient } from "./lcdclient";
 
 /**
@@ -25,7 +26,7 @@ export interface BaseAccount {
    * [1]: https://github.com/cosmos/cosmos-sdk/pull/5280
    * [2]: https://github.com/cosmos/cosmos-sdk/pull/6749
    */
-  readonly public_key: string | PubKey | null;
+  readonly public_key: string | Pubkey | null;
   /**
    * The account number assigned by the blockchain.
    *
diff --git a/packages/launchpad/src/lcdapi/utils.spec.ts b/packages/launchpad/src/lcdapi/utils.spec.ts
index 27b370a9..646eee1c 100644
--- a/packages/launchpad/src/lcdapi/utils.spec.ts
+++ b/packages/launchpad/src/lcdapi/utils.spec.ts
@@ -1,4 +1,5 @@
-import { PubKey } from "../types";
+import { Pubkey } from "@cosmjs/amino";
+
 import { normalizePubkey, uint64ToNumber, uint64ToString } from "./utils";
 
 describe("utils", () => {
@@ -84,7 +85,7 @@ describe("utils", () => {
     });
 
     it("passes PubKey unchanged", () => {
-      const original: PubKey = {
+      const original: Pubkey = {
         type: "tendermint/PubKeySecp256k1",
         value: "A08EGB7ro1ORuFhjOnZcSgwYlpe0DSFjVNUIkNNQxwKQ",
       };
diff --git a/packages/launchpad/src/lcdapi/utils.ts b/packages/launchpad/src/lcdapi/utils.ts
index 5f797746..558033dc 100644
--- a/packages/launchpad/src/lcdapi/utils.ts
+++ b/packages/launchpad/src/lcdapi/utils.ts
@@ -1,8 +1,6 @@
+import { decodeBech32Pubkey, Pubkey } from "@cosmjs/amino";
 import { Uint64 } from "@cosmjs/math";
 
-import { decodeBech32Pubkey } from "../pubkey";
-import { PubKey } from "../types";
-
 /**
  * Converts an integer expressed as number or string to a number.
  * Throws if input is not a valid uint64 or if the value exceeds MAX_SAFE_INTEGER.
@@ -31,7 +29,7 @@ export function uint64ToString(input: number | string): string {
  *
  * Returns null when unset.
  */
-export function normalizePubkey(input: string | PubKey | null): PubKey | null {
+export function normalizePubkey(input: string | Pubkey | null): Pubkey | null {
   if (!input) return null;
   if (typeof input === "string") return decodeBech32Pubkey(input);
   return input;
diff --git a/packages/launchpad/src/pubkey.spec.ts b/packages/launchpad/src/pubkey.spec.ts
index 9576239b..e69de29b 100644
--- a/packages/launchpad/src/pubkey.spec.ts
+++ b/packages/launchpad/src/pubkey.spec.ts
@@ -1,135 +0,0 @@
-import { Bech32, fromBase64 } from "@cosmjs/encoding";
-
-import {
-  decodeAminoPubkey,
-  decodeBech32Pubkey,
-  encodeAminoPubkey,
-  encodeBech32Pubkey,
-  encodeSecp256k1Pubkey,
-} from "./pubkey";
-import { PubKey } from "./types";
-
-describe("pubkey", () => {
-  describe("encodeSecp256k1Pubkey", () => {
-    it("encodes a compresed pubkey", () => {
-      const pubkey = fromBase64("AtQaCqFnshaZQp6rIkvAPyzThvCvXSDO+9AzbxVErqJP");
-      expect(encodeSecp256k1Pubkey(pubkey)).toEqual({
-        type: "tendermint/PubKeySecp256k1",
-        value: "AtQaCqFnshaZQp6rIkvAPyzThvCvXSDO+9AzbxVErqJP",
-      });
-    });
-
-    it("throws for uncompressed public keys", () => {
-      const pubkey = fromBase64(
-        "BE8EGB7ro1ORuFhjOnZcSgwYlpe0DSFjVNUIkNNQxwKQE7WHpoHoNswYeoFkuYpYSKK4mzFzMV/dB0DVAy4lnNU=",
-      );
-      expect(() => encodeSecp256k1Pubkey(pubkey)).toThrowError(/public key must be compressed secp256k1/i);
-    });
-  });
-
-  describe("decodeAminoPubkey", () => {
-    it("works for secp256k1", () => {
-      const amino = Bech32.decode(
-        "cosmospub1addwnpepqd8sgxq7aw348ydctp3n5ajufgxp395hksxjzc6565yfp56scupfqhlgyg5",
-      ).data;
-      expect(decodeAminoPubkey(amino)).toEqual({
-        type: "tendermint/PubKeySecp256k1",
-        value: "A08EGB7ro1ORuFhjOnZcSgwYlpe0DSFjVNUIkNNQxwKQ",
-      });
-    });
-
-    it("works for ed25519", () => {
-      // Encoded from `corald tendermint show-validator`
-      // Decoded from http://localhost:26657/validators
-      const amino = Bech32.decode(
-        "coralvalconspub1zcjduepqvxg72ccnl9r65fv0wn3amlk4sfzqfe2k36l073kjx2qyaf6sk23qw7j8wq",
-      ).data;
-      expect(decodeAminoPubkey(amino)).toEqual({
-        type: "tendermint/PubKeyEd25519",
-        value: "YZHlYxP5R6olj3Tj3f7VgkQE5VaOvv9G0jKATqdQsqI=",
-      });
-    });
-  });
-
-  describe("decodeBech32Pubkey", () => {
-    it("works", () => {
-      expect(
-        decodeBech32Pubkey("cosmospub1addwnpepqd8sgxq7aw348ydctp3n5ajufgxp395hksxjzc6565yfp56scupfqhlgyg5"),
-      ).toEqual({
-        type: "tendermint/PubKeySecp256k1",
-        value: "A08EGB7ro1ORuFhjOnZcSgwYlpe0DSFjVNUIkNNQxwKQ",
-      });
-    });
-
-    it("works for enigma pubkey", () => {
-      expect(
-        decodeBech32Pubkey("enigmapub1addwnpepqw5k9p439nw0zpg2aundx4umwx4nw233z5prpjqjv5anl5grmnchzp2xwvv"),
-      ).toEqual({
-        type: "tendermint/PubKeySecp256k1",
-        value: "A6lihrEs3PEFCu8m01ebcas3KjEVAjDIEmU7P9ED3PFx",
-      });
-    });
-
-    it("works for ed25519", () => {
-      // Encoded from `corald tendermint show-validator`
-      // Decoded from http://localhost:26657/validators
-      const decoded = decodeBech32Pubkey(
-        "coralvalconspub1zcjduepqvxg72ccnl9r65fv0wn3amlk4sfzqfe2k36l073kjx2qyaf6sk23qw7j8wq",
-      );
-      expect(decoded).toEqual({
-        type: "tendermint/PubKeyEd25519",
-        value: "YZHlYxP5R6olj3Tj3f7VgkQE5VaOvv9G0jKATqdQsqI=",
-      });
-    });
-  });
-
-  describe("encodeAminoPubkey", () => {
-    it("works for secp256k1", () => {
-      const pubkey: PubKey = {
-        type: "tendermint/PubKeySecp256k1",
-        value: "A08EGB7ro1ORuFhjOnZcSgwYlpe0DSFjVNUIkNNQxwKQ",
-      };
-      const expected = Bech32.decode(
-        "cosmospub1addwnpepqd8sgxq7aw348ydctp3n5ajufgxp395hksxjzc6565yfp56scupfqhlgyg5",
-      ).data;
-      expect(encodeAminoPubkey(pubkey)).toEqual(expected);
-    });
-
-    it("works for ed25519", () => {
-      // Decoded from http://localhost:26657/validators
-      // Encoded from `corald tendermint show-validator`
-      const pubkey: PubKey = {
-        type: "tendermint/PubKeyEd25519",
-        value: "YZHlYxP5R6olj3Tj3f7VgkQE5VaOvv9G0jKATqdQsqI=",
-      };
-      const expected = Bech32.decode(
-        "coralvalconspub1zcjduepqvxg72ccnl9r65fv0wn3amlk4sfzqfe2k36l073kjx2qyaf6sk23qw7j8wq",
-      ).data;
-      expect(encodeAminoPubkey(pubkey)).toEqual(expected);
-    });
-  });
-
-  describe("encodeBech32Pubkey", () => {
-    it("works for secp256k1", () => {
-      const pubkey: PubKey = {
-        type: "tendermint/PubKeySecp256k1",
-        value: "A08EGB7ro1ORuFhjOnZcSgwYlpe0DSFjVNUIkNNQxwKQ",
-      };
-      expect(encodeBech32Pubkey(pubkey, "cosmospub")).toEqual(
-        "cosmospub1addwnpepqd8sgxq7aw348ydctp3n5ajufgxp395hksxjzc6565yfp56scupfqhlgyg5",
-      );
-    });
-
-    it("works for ed25519", () => {
-      // Decoded from http://localhost:26657/validators
-      // Encoded from `corald tendermint show-validator`
-      const pubkey: PubKey = {
-        type: "tendermint/PubKeyEd25519",
-        value: "YZHlYxP5R6olj3Tj3f7VgkQE5VaOvv9G0jKATqdQsqI=",
-      };
-      expect(encodeBech32Pubkey(pubkey, "coralvalconspub")).toEqual(
-        "coralvalconspub1zcjduepqvxg72ccnl9r65fv0wn3amlk4sfzqfe2k36l073kjx2qyaf6sk23qw7j8wq",
-      );
-    });
-  });
-});
diff --git a/packages/launchpad/src/pubkey.ts b/packages/launchpad/src/pubkey.ts
index bebc3c62..e69de29b 100644
--- a/packages/launchpad/src/pubkey.ts
+++ b/packages/launchpad/src/pubkey.ts
@@ -1,97 +0,0 @@
-import { Bech32, fromBase64, fromHex, toBase64, toHex } from "@cosmjs/encoding";
-import { arrayContentEquals } from "@cosmjs/utils";
-
-import { PubKey, pubkeyType } from "./types";
-
-export function encodeSecp256k1Pubkey(pubkey: Uint8Array): PubKey {
-  if (pubkey.length !== 33 || (pubkey[0] !== 0x02 && pubkey[0] !== 0x03)) {
-    throw new Error("Public key must be compressed secp256k1, i.e. 33 bytes starting with 0x02 or 0x03");
-  }
-  return {
-    type: pubkeyType.secp256k1,
-    value: toBase64(pubkey),
-  };
-}
-
-// As discussed in https://github.com/binance-chain/javascript-sdk/issues/163
-// Prefixes listed here: https://github.com/tendermint/tendermint/blob/d419fffe18531317c28c29a292ad7d253f6cafdf/docs/spec/blockchain/encoding.md#public-key-cryptography
-// Last bytes is varint-encoded length prefix
-const pubkeyAminoPrefixSecp256k1 = fromHex("eb5ae98721");
-const pubkeyAminoPrefixEd25519 = fromHex("1624de6420");
-const pubkeyAminoPrefixSr25519 = fromHex("0dfb1005");
-const pubkeyAminoPrefixLength = pubkeyAminoPrefixSecp256k1.length;
-
-/**
- * Decodes a pubkey in the Amino binary format to a type/value object.
- */
-export function decodeAminoPubkey(data: Uint8Array): PubKey {
-  const aminoPrefix = data.slice(0, pubkeyAminoPrefixLength);
-  const rest = data.slice(pubkeyAminoPrefixLength);
-  if (arrayContentEquals(aminoPrefix, pubkeyAminoPrefixSecp256k1)) {
-    if (rest.length !== 33) {
-      throw new Error("Invalid rest data length. Expected 33 bytes (compressed secp256k1 pubkey).");
-    }
-    return {
-      type: pubkeyType.secp256k1,
-      value: toBase64(rest),
-    };
-  } else if (arrayContentEquals(aminoPrefix, pubkeyAminoPrefixEd25519)) {
-    if (rest.length !== 32) {
-      throw new Error("Invalid rest data length. Expected 32 bytes (Ed25519 pubkey).");
-    }
-    return {
-      type: pubkeyType.ed25519,
-      value: toBase64(rest),
-    };
-  } else if (arrayContentEquals(aminoPrefix, pubkeyAminoPrefixSr25519)) {
-    if (rest.length !== 32) {
-      throw new Error("Invalid rest data length. Expected 32 bytes (Sr25519 pubkey).");
-    }
-    return {
-      type: pubkeyType.sr25519,
-      value: toBase64(rest),
-    };
-  } else {
-    throw new Error("Unsupported Pubkey type. Amino prefix: " + toHex(aminoPrefix));
-  }
-}
-
-/**
- * Decodes a bech32 pubkey to Amino binary, which is then decoded to a type/value object.
- * The bech32 prefix is ignored and discareded.
- *
- * @param bechEncoded the bech32 encoded pubkey
- */
-export function decodeBech32Pubkey(bechEncoded: string): PubKey {
-  const { data } = Bech32.decode(bechEncoded);
-  return decodeAminoPubkey(data);
-}
-
-/**
- * Encodes a public key to binary Amino.
- */
-export function encodeAminoPubkey(pubkey: PubKey): Uint8Array {
-  let aminoPrefix: Uint8Array;
-  switch (pubkey.type) {
-    // Note: please don't add cases here without writing additional unit tests
-    case pubkeyType.secp256k1:
-      aminoPrefix = pubkeyAminoPrefixSecp256k1;
-      break;
-    case pubkeyType.ed25519:
-      aminoPrefix = pubkeyAminoPrefixEd25519;
-      break;
-    default:
-      throw new Error("Unsupported pubkey type");
-  }
-  return new Uint8Array([...aminoPrefix, ...fromBase64(pubkey.value)]);
-}
-
-/**
- * Encodes a public key to binary Amino and then to bech32.
- *
- * @param pubkey the public key to encode
- * @param prefix the bech32 prefix (human readable part)
- */
-export function encodeBech32Pubkey(pubkey: PubKey, prefix: string): string {
-  return Bech32.encode(prefix, encodeAminoPubkey(pubkey));
-}
diff --git a/packages/launchpad/src/secp256k1hdwallet.ts b/packages/launchpad/src/secp256k1hdwallet.ts
index cea4e63b..fa7d8b9c 100644
--- a/packages/launchpad/src/secp256k1hdwallet.ts
+++ b/packages/launchpad/src/secp256k1hdwallet.ts
@@ -1,3 +1,4 @@
+import { rawSecp256k1PubkeyToRawAddress } from "@cosmjs/amino";
 import {
   Bip39,
   EnglishMnemonic,
@@ -10,10 +11,9 @@ import {
   Slip10Curve,
   stringToPath,
 } from "@cosmjs/crypto";
-import { fromBase64, fromUtf8, toBase64, toUtf8 } from "@cosmjs/encoding";
+import { Bech32, fromBase64, fromUtf8, toBase64, toUtf8 } from "@cosmjs/encoding";
 import { assert, isNonNullObject } from "@cosmjs/utils";
 
-import { rawSecp256k1PubkeyToAddress } from "./address";
 import { serializeSignDoc, StdSignDoc } from "./encoding";
 import { makeCosmoshubPath } from "./paths";
 import { encodeSecp256k1Signature } from "./signature";
@@ -246,7 +246,7 @@ export class Secp256k1HdWallet implements OfflineSigner {
   }
 
   private get address(): string {
-    return rawSecp256k1PubkeyToAddress(this.pubkey, this.accounts[0].prefix);
+    return Bech32.encode(this.accounts[0].prefix, rawSecp256k1PubkeyToRawAddress(this.pubkey));
   }
 
   public async getAccounts(): Promise<readonly AccountData[]> {
diff --git a/packages/launchpad/src/secp256k1wallet.ts b/packages/launchpad/src/secp256k1wallet.ts
index b8e84960..94552d84 100644
--- a/packages/launchpad/src/secp256k1wallet.ts
+++ b/packages/launchpad/src/secp256k1wallet.ts
@@ -1,6 +1,7 @@
+import { rawSecp256k1PubkeyToRawAddress } from "@cosmjs/amino";
 import { Secp256k1, Sha256 } from "@cosmjs/crypto";
+import { Bech32 } from "@cosmjs/encoding";
 
-import { rawSecp256k1PubkeyToAddress } from "./address";
 import { serializeSignDoc, StdSignDoc } from "./encoding";
 import { encodeSecp256k1Signature } from "./signature";
 import { AccountData, AminoSignResponse, OfflineSigner } from "./signer";
@@ -33,7 +34,7 @@ export class Secp256k1Wallet implements OfflineSigner {
   }
 
   private get address(): string {
-    return rawSecp256k1PubkeyToAddress(this.pubkey, this.prefix);
+    return Bech32.encode(this.prefix, rawSecp256k1PubkeyToRawAddress(this.pubkey));
   }
 
   public async getAccounts(): Promise<readonly AccountData[]> {
diff --git a/packages/launchpad/src/signature.ts b/packages/launchpad/src/signature.ts
index d94ad665..15f37f00 100644
--- a/packages/launchpad/src/signature.ts
+++ b/packages/launchpad/src/signature.ts
@@ -1,8 +1,8 @@
 /* eslint-disable @typescript-eslint/naming-convention */
+import { encodeSecp256k1Pubkey, pubkeyType } from "@cosmjs/amino";
 import { fromBase64, toBase64 } from "@cosmjs/encoding";
 
-import { encodeSecp256k1Pubkey } from "./pubkey";
-import { pubkeyType, StdSignature } from "./types";
+import { StdSignature } from "./types";
 
 /**
  * Takes a binary pubkey and signature to create a signature object
diff --git a/packages/launchpad/src/types.ts b/packages/launchpad/src/types.ts
index 8f0b5565..bb674bc1 100644
--- a/packages/launchpad/src/types.ts
+++ b/packages/launchpad/src/types.ts
@@ -1,4 +1,6 @@
 /* eslint-disable @typescript-eslint/naming-convention */
+import { Pubkey } from "@cosmjs/amino";
+
 import { Coin } from "./coins";
 
 export interface StdFee {
@@ -7,25 +9,6 @@ export interface StdFee {
 }
 
 export interface StdSignature {
-  readonly pub_key: PubKey;
+  readonly pub_key: Pubkey;
   readonly signature: string;
 }
-
-export interface PubKey {
-  // type is one of the strings defined in pubkeyType
-  // I don't use a string literal union here as that makes trouble with json test data:
-  // https://github.com/cosmos/cosmjs/pull/44#pullrequestreview-353280504
-  readonly type: string;
-  // Value field is base64-encoded in all cases
-  // Note: if type is Secp256k1, this must contain a COMPRESSED pubkey - to encode from bcp/keycontrol land, you must compress it first
-  readonly value: string;
-}
-
-export const pubkeyType = {
-  /** @see https://github.com/tendermint/tendermint/blob/v0.33.0/crypto/ed25519/ed25519.go#L22 */
-  secp256k1: "tendermint/PubKeySecp256k1" as const,
-  /** @see https://github.com/tendermint/tendermint/blob/v0.33.0/crypto/secp256k1/secp256k1.go#L23 */
-  ed25519: "tendermint/PubKeyEd25519" as const,
-  /** @see https://github.com/tendermint/tendermint/blob/v0.33.0/crypto/sr25519/codec.go#L12 */
-  sr25519: "tendermint/PubKeySr25519" as const,
-};
diff --git a/packages/proto-signing/package.json b/packages/proto-signing/package.json
index 64355abd..806b3a8f 100644
--- a/packages/proto-signing/package.json
+++ b/packages/proto-signing/package.json
@@ -43,6 +43,7 @@
     "postdefine-proto": "prettier --write \"src/codec/**/*.ts\""
   },
   "dependencies": {
+    "@cosmjs/amino": "^0.25.0-alpha.0",
     "@cosmjs/launchpad": "^0.25.0-alpha.0",
     "long": "^4.0.0",
     "protobufjs": "~6.10.2"
diff --git a/packages/proto-signing/src/directsecp256k1hdwallet.ts b/packages/proto-signing/src/directsecp256k1hdwallet.ts
index bb6058d7..cfdbc8c4 100644
--- a/packages/proto-signing/src/directsecp256k1hdwallet.ts
+++ b/packages/proto-signing/src/directsecp256k1hdwallet.ts
@@ -1,3 +1,4 @@
+import { rawSecp256k1PubkeyToRawAddress } from "@cosmjs/amino";
 import {
   Bip39,
   EnglishMnemonic,
@@ -8,7 +9,8 @@ import {
   Slip10,
   Slip10Curve,
 } from "@cosmjs/crypto";
-import { encodeSecp256k1Signature, rawSecp256k1PubkeyToAddress } from "@cosmjs/launchpad";
+import { Bech32 } from "@cosmjs/encoding";
+import { encodeSecp256k1Signature } from "@cosmjs/launchpad";
 
 import { SignDoc } from "./codec/cosmos/tx/v1beta1/tx";
 import { makeCosmoshubPath } from "./paths";
@@ -99,7 +101,7 @@ export class DirectSecp256k1HdWallet implements OfflineDirectSigner {
   }
 
   private get address(): string {
-    return rawSecp256k1PubkeyToAddress(this.pubkey, this.accounts[0].prefix);
+    return Bech32.encode(this.accounts[0].prefix, rawSecp256k1PubkeyToRawAddress(this.pubkey));
   }
 
   public async getAccounts(): Promise<readonly AccountData[]> {
diff --git a/packages/proto-signing/src/directsecp256k1wallet.ts b/packages/proto-signing/src/directsecp256k1wallet.ts
index 28133f10..9207d9c6 100644
--- a/packages/proto-signing/src/directsecp256k1wallet.ts
+++ b/packages/proto-signing/src/directsecp256k1wallet.ts
@@ -1,5 +1,7 @@
+import { rawSecp256k1PubkeyToRawAddress } from "@cosmjs/amino";
 import { Secp256k1, sha256 } from "@cosmjs/crypto";
-import { encodeSecp256k1Signature, rawSecp256k1PubkeyToAddress } from "@cosmjs/launchpad";
+import { Bech32 } from "@cosmjs/encoding";
+import { encodeSecp256k1Signature } from "@cosmjs/launchpad";
 
 import { SignDoc } from "./codec/cosmos/tx/v1beta1/tx";
 import { AccountData, DirectSignResponse, OfflineDirectSigner } from "./signer";
@@ -33,7 +35,7 @@ export class DirectSecp256k1Wallet implements OfflineDirectSigner {
   }
 
   private get address(): string {
-    return rawSecp256k1PubkeyToAddress(this.pubkey, this.prefix);
+    return Bech32.encode(this.prefix, rawSecp256k1PubkeyToRawAddress(this.pubkey));
   }
 
   public async getAccounts(): Promise<readonly AccountData[]> {
diff --git a/packages/proto-signing/src/pubkey.ts b/packages/proto-signing/src/pubkey.ts
index 08bb9b2f..faa88ac4 100644
--- a/packages/proto-signing/src/pubkey.ts
+++ b/packages/proto-signing/src/pubkey.ts
@@ -1,11 +1,11 @@
 /* eslint-disable @typescript-eslint/naming-convention */
+import { encodeSecp256k1Pubkey, SinglePubkey as AminoPubKey } from "@cosmjs/amino";
 import { fromBase64 } from "@cosmjs/encoding";
-import { encodeSecp256k1Pubkey, PubKey as LaunchpadPubKey } from "@cosmjs/launchpad";
 
 import { PubKey } from "./codec/cosmos/crypto/secp256k1/keys";
 import { Any } from "./codec/google/protobuf/any";
 
-export function encodePubkey(pubkey: LaunchpadPubKey): Any {
+export function encodePubkey(pubkey: AminoPubKey): Any {
   switch (pubkey.type) {
     case "tendermint/PubKeySecp256k1": {
       const pubkeyProto = PubKey.fromPartial({
@@ -21,7 +21,7 @@ export function encodePubkey(pubkey: LaunchpadPubKey): Any {
   }
 }
 
-export function decodePubkey(pubkey?: Any | null): LaunchpadPubKey | null {
+export function decodePubkey(pubkey?: Any | null): AminoPubKey | null {
   if (!pubkey || !pubkey.value) {
     return null;
   }
diff --git a/packages/stargate/package.json b/packages/stargate/package.json
index 70925d26..0e68bab6 100644
--- a/packages/stargate/package.json
+++ b/packages/stargate/package.json
@@ -43,6 +43,7 @@
   },
   "dependencies": {
     "@confio/ics23": "^0.6.3",
+    "@cosmjs/amino": "^0.25.0-alpha.0",
     "@cosmjs/encoding": "^0.25.0-alpha.0",
     "@cosmjs/launchpad": "^0.25.0-alpha.0",
     "@cosmjs/math": "^0.25.0-alpha.0",
diff --git a/packages/stargate/src/accounts.ts b/packages/stargate/src/accounts.ts
index 58280523..04ab739b 100644
--- a/packages/stargate/src/accounts.ts
+++ b/packages/stargate/src/accounts.ts
@@ -1,4 +1,4 @@
-import { PubKey } from "@cosmjs/launchpad";
+import { Pubkey } from "@cosmjs/amino";
 import { Uint64 } from "@cosmjs/math";
 import { decodePubkey } from "@cosmjs/proto-signing";
 import { assert } from "@cosmjs/utils";
@@ -16,7 +16,7 @@ import { Any } from "./codec/google/protobuf/any";
 export interface Account {
   /** Bech32 account address */
   readonly address: string;
-  readonly pubkey: PubKey | null;
+  readonly pubkey: Pubkey | null;
   readonly accountNumber: number;
   readonly sequence: number;
 }
diff --git a/packages/stargate/src/aminotypes.spec.ts b/packages/stargate/src/aminotypes.spec.ts
index 0c768341..bf598e3c 100644
--- a/packages/stargate/src/aminotypes.spec.ts
+++ b/packages/stargate/src/aminotypes.spec.ts
@@ -1,9 +1,9 @@
 /* eslint-disable @typescript-eslint/naming-convention */
+import { encodeBech32Pubkey } from "@cosmjs/amino";
 import { fromBase64 } from "@cosmjs/encoding";
 import {
   coin,
   coins,
-  encodeBech32Pubkey,
   MsgBeginRedelegate as LaunchpadMsgBeginRedelegate,
   MsgCreateValidator as LaunchpadMsgCreateValidator,
   MsgDelegate as LaunchpadMsgDelegate,
diff --git a/packages/stargate/src/aminotypes.ts b/packages/stargate/src/aminotypes.ts
index b79edf93..7392af22 100644
--- a/packages/stargate/src/aminotypes.ts
+++ b/packages/stargate/src/aminotypes.ts
@@ -1,8 +1,7 @@
 /* eslint-disable @typescript-eslint/naming-convention */
+import { decodeBech32Pubkey, encodeBech32Pubkey } from "@cosmjs/amino";
 import { fromBase64, toBase64 } from "@cosmjs/encoding";
 import {
-  decodeBech32Pubkey,
-  encodeBech32Pubkey,
   Msg,
   MsgBeginRedelegate as LaunchpadMsgBeginRedelegate,
   MsgCreateValidator as LaunchpadMsgCreateValidator,
diff --git a/packages/stargate/src/signingstargateclient.ts b/packages/stargate/src/signingstargateclient.ts
index b7d5bc75..08d70484 100644
--- a/packages/stargate/src/signingstargateclient.ts
+++ b/packages/stargate/src/signingstargateclient.ts
@@ -1,9 +1,9 @@
+import { encodeSecp256k1Pubkey } from "@cosmjs/amino";
 import { fromBase64 } from "@cosmjs/encoding";
 import {
   buildFeeTable,
   Coin,
   CosmosFeeTable,
-  encodeSecp256k1Pubkey,
   GasLimits,
   GasPrice,
   makeSignDoc as makeSignDocAmino,
diff --git a/packages/utils/src/array.spec.ts b/packages/utils/src/array.spec.ts
index d42241bc..0dae826e 100644
--- a/packages/utils/src/array.spec.ts
+++ b/packages/utils/src/array.spec.ts
@@ -1,4 +1,4 @@
-import { arrayContentEquals } from "./arrays";
+import { arrayContentEquals, arrayContentStartsWith } from "./arrays";
 
 describe("array", () => {
   describe("arrayContentEquals", () => {
@@ -30,4 +30,32 @@ describe("array", () => {
       expect(arrayContentEquals([], new Uint8Array([]))).toEqual(true);
     });
   });
+
+  describe("arrayContentStartsWith", () => {
+    it("can compare number arrays", () => {
+      // same length
+      expect(arrayContentStartsWith([], [])).toEqual(true); // Same behaviour as "".startsWith("")
+      expect(arrayContentStartsWith([1, 2, 3], [1, 2, 3])).toEqual(true);
+      expect(arrayContentStartsWith([1, 2, 3], [1, 2, 8])).toEqual(false);
+      expect(arrayContentStartsWith([1, 2, 3], [0, 0, 0])).toEqual(false);
+
+      // a shorter than b
+      expect(arrayContentStartsWith([], [1, 2, 3])).toEqual(false);
+      expect(arrayContentStartsWith([1], [1, 2, 3])).toEqual(false);
+      expect(arrayContentStartsWith([1, 2], [1, 2, 3])).toEqual(false);
+
+      // a longer than b
+      expect(arrayContentStartsWith([1, 2, 3, 4, 5], [1, 2, 3, 4, 5])).toEqual(true);
+      expect(arrayContentStartsWith([1, 2, 3, 4, 5], [1, 2, 3, 4])).toEqual(true);
+      expect(arrayContentStartsWith([1, 2, 3, 4, 5], [1, 2, 3])).toEqual(true);
+      expect(arrayContentStartsWith([1, 2, 3, 4, 5], [1, 2])).toEqual(true);
+      expect(arrayContentStartsWith([1, 2, 3, 4, 5], [1])).toEqual(true);
+      expect(arrayContentStartsWith([1, 2, 3, 4, 5], [])).toEqual(true);
+      expect(arrayContentStartsWith([1, 2, 3, 4, 5], [1, 2, 3, 4, 0])).toEqual(false);
+      expect(arrayContentStartsWith([1, 2, 3, 4, 5], [1, 2, 3, 0])).toEqual(false);
+      expect(arrayContentStartsWith([1, 2, 3, 4, 5], [1, 2, 0])).toEqual(false);
+      expect(arrayContentStartsWith([1, 2, 3, 4, 5], [1, 0])).toEqual(false);
+      expect(arrayContentStartsWith([1, 2, 3, 4, 5], [0])).toEqual(false);
+    });
+  });
 });
diff --git a/packages/utils/src/arrays.ts b/packages/utils/src/arrays.ts
index 87f5a442..4f15b89e 100644
--- a/packages/utils/src/arrays.ts
+++ b/packages/utils/src/arrays.ts
@@ -16,3 +16,22 @@ export function arrayContentEquals<T extends string | number | boolean>(
   }
   return true;
 }
+
+/**
+ * Checks if `a` starts with the contents of `b`.
+ *
+ * This requires equality of the element values, where element equality means `===` returning `true`.
+ *
+ * This allows you to compare the content of a Buffer, Uint8Array or number[], ignoring the specific type.
+ * As a consequence, this returns different results than Jasmine's `toEqual`, which ensures elements have the same type.
+ */
+export function arrayContentStartsWith<T extends string | number | boolean>(
+  a: ArrayLike<T>,
+  b: ArrayLike<T>,
+): boolean {
+  if (a.length < b.length) return false;
+  for (let i = 0; i < b.length; ++i) {
+    if (a[i] !== b[i]) return false;
+  }
+  return true;
+}
diff --git a/packages/utils/src/index.ts b/packages/utils/src/index.ts
index 372b3615..790c7d27 100644
--- a/packages/utils/src/index.ts
+++ b/packages/utils/src/index.ts
@@ -1,4 +1,4 @@
-export { arrayContentEquals } from "./arrays";
+export { arrayContentEquals, arrayContentStartsWith } from "./arrays";
 export { assert, assertDefined, assertDefinedAndNotNull } from "./assert";
 export { sleep } from "./sleep";
 export { isNonNullObject, isUint8Array } from "./typechecks";