diff --git a/packages/hdwallet-native/src/crypto/isolation/adapters/binance.ts b/packages/hdwallet-native/src/crypto/isolation/adapters/binance.ts
index f496febcf..49af6befb 100644
--- a/packages/hdwallet-native/src/crypto/isolation/adapters/binance.ts
+++ b/packages/hdwallet-native/src/crypto/isolation/adapters/binance.ts
@@ -7,9 +7,8 @@ export default {
   async create(keyPair: BIP32.Node): Promise<SigningDelegate> {
     return async (tx: Transaction, signMsg?: any): Promise<Transaction> => {
       const signBytes = tx.getSignBytes(signMsg);
-      const signHash = Digest.Algorithms["sha256"](signBytes);
       const pubKey = crypto.getPublicKey(Buffer.from(await keyPair.publicKey).toString("hex"));
-      const sig = Buffer.from(await SecP256K1.Signature.signCanonically(keyPair, signHash));
+      const sig = Buffer.from(await SecP256K1.Signature.signCanonically(keyPair, "sha256", signBytes));
       tx.addSignature(pubKey, sig);
       return tx;
     };
diff --git a/packages/hdwallet-native/src/crypto/isolation/adapters/bitcoin.ts b/packages/hdwallet-native/src/crypto/isolation/adapters/bitcoin.ts
index ca2a1fc87..1218fc2fe 100644
--- a/packages/hdwallet-native/src/crypto/isolation/adapters/bitcoin.ts
+++ b/packages/hdwallet-native/src/crypto/isolation/adapters/bitcoin.ts
@@ -1,5 +1,6 @@
 import { ECPairInterface, Network, SignerAsync, crypto as bcrypto, networks } from "@shapeshiftoss/bitcoinjs-lib";
 import { SecP256K1, IsolationError } from "../core"
+import { assertType, ByteArray } from "../types";
 
 export type ECPairInterfaceAsync = Omit<ECPairInterface, "sign"> & Pick<SignerAsync, "sign">;
 
@@ -41,8 +42,21 @@ export class ECPairAdapter implements SecP256K1.ECDSAKey, SignerAsync, ECPairInt
     }
 
     async sign(hash: bcrypto.NonDigest | bcrypto.Digest<"hash256">, lowR?: boolean): Promise<Buffer> {
+        assertType(ByteArray(), hash);
+
         lowR = lowR ?? this.lowR;
-        const sig = (!lowR ? await this._isolatedKey.ecdsaSign(hash) : await SecP256K1.Signature.signCanonically(this._isolatedKey, hash));
+        const sig = await(async () => {
+          if (!hash.algorithm) {
+            assertType(ByteArray(32), hash);
+            return !lowR
+              ? await this._isolatedKey.ecdsaSign(null, hash)
+              : await SecP256K1.Signature.signCanonically(this._isolatedKey, null, hash);
+          } else {
+            return !lowR
+              ? await this._isolatedKey.ecdsaSign(hash.algorithm, hash.preimage)
+              : await SecP256K1.Signature.signCanonically(this._isolatedKey, hash.algorithm, hash.preimage);
+          }
+        })();
         return Buffer.from(sig);
     }
     get publicKey() { return this.getPublicKey(); }
@@ -55,7 +69,7 @@ export class ECPairAdapter implements SecP256K1.ECDSAKey, SignerAsync, ECPairInt
     toWIF(): never { throw new IsolationError("WIF"); }
     verify(hash: Uint8Array, signature: Uint8Array) {
         SecP256K1.Signature.assert(signature);
-        return SecP256K1.Signature.verify(signature, hash, this._publicKey);
+        return SecP256K1.Signature.verify(signature, null, hash, this._publicKey);
     }
 }
 
diff --git a/packages/hdwallet-native/src/crypto/isolation/adapters/cosmos.ts b/packages/hdwallet-native/src/crypto/isolation/adapters/cosmos.ts
index effeade5a..8b3628e67 100644
--- a/packages/hdwallet-native/src/crypto/isolation/adapters/cosmos.ts
+++ b/packages/hdwallet-native/src/crypto/isolation/adapters/cosmos.ts
@@ -1,5 +1,5 @@
 import { SecP256K1 } from "../core";
-import * as Digest from "../core/digest";
+
 export class WalletAdapter {
     protected readonly _isolatedKey: SecP256K1.ECDSAKey;
     readonly _publicKey: SecP256K1.CurvePoint;
@@ -19,8 +19,7 @@ export class WalletAdapter {
 
     async sign(signMessage: string): Promise<Buffer> {
         const signBuf = Buffer.from(signMessage.normalize("NFKD"), "utf8");
-        const signBufHash = Digest.Algorithms["sha256"](signBuf);
-        return Buffer.from(await this._isolatedKey.ecdsaSign(signBufHash));
+        return Buffer.from(await this._isolatedKey.ecdsaSign("sha256", signBuf));
     }
 }
 
diff --git a/packages/hdwallet-native/src/crypto/isolation/adapters/ethereum.ts b/packages/hdwallet-native/src/crypto/isolation/adapters/ethereum.ts
index 7996bb98c..d13e5c261 100644
--- a/packages/hdwallet-native/src/crypto/isolation/adapters/ethereum.ts
+++ b/packages/hdwallet-native/src/crypto/isolation/adapters/ethereum.ts
@@ -1,7 +1,7 @@
 import * as core from "@shapeshiftoss/hdwallet-core"
 import * as ethers from "ethers";
 
-import { SecP256K1, Digest } from "../core";
+import { SecP256K1 } from "../core";
 
 export class SignerAdapter extends ethers.Signer {
   protected readonly _isolatedKey: SecP256K1.ECDSAKey & SecP256K1.ECDHKey;
@@ -30,7 +30,7 @@ export class SignerAdapter extends ethers.Signer {
   }
 
   async signDigest(digest: ethers.BytesLike): Promise<ethers.Signature> {
-    const rawSig = await SecP256K1.RecoverableSignature.signCanonically(this._isolatedKey, digest instanceof Uint8Array ? digest : ethers.utils.arrayify(digest));
+    const rawSig = await SecP256K1.RecoverableSignature.signCanonically(this._isolatedKey, null, digest instanceof Uint8Array ? digest : ethers.utils.arrayify(digest));
     return ethers.utils.splitSignature(core.compatibleBufferConcat([rawSig, Buffer.from([rawSig.recoveryParam])]));
   }
 
@@ -48,7 +48,8 @@ export class SignerAdapter extends ethers.Signer {
     }
 
     const txBuf = ethers.utils.arrayify(ethers.utils.serializeTransaction(unsignedTx));
-    const signature = await this.signDigest(Digest.Algorithms["keccak256"](txBuf));
+    const rawSig = await SecP256K1.RecoverableSignature.signCanonically(this._isolatedKey, "keccak256", txBuf);
+    const signature = ethers.utils.splitSignature(core.compatibleBufferConcat([rawSig, Buffer.from([rawSig.recoveryParam])]));
     return ethers.utils.serializeTransaction(unsignedTx, signature);
   }
 
@@ -58,7 +59,8 @@ export class SignerAdapter extends ethers.Signer {
         ? Buffer.from(messageData.normalize("NFKD"), "utf8")
         : Buffer.from(ethers.utils.arrayify(messageData));
     const messageBuf = core.compatibleBufferConcat([Buffer.from(`\x19Ethereum Signed Message:\n${messageDataBuf.length}`, "utf8"), messageDataBuf]);
-    const signature = await this.signDigest(Digest.Algorithms["keccak256"](messageBuf));
+    const rawSig = await SecP256K1.RecoverableSignature.signCanonically(this._isolatedKey, "keccak256", messageBuf);
+    const signature = ethers.utils.splitSignature(core.compatibleBufferConcat([rawSig, Buffer.from([rawSig.recoveryParam])]));
     return ethers.utils.joinSignature(signature);
   }
 }
diff --git a/packages/hdwallet-native/src/crypto/isolation/adapters/fio.ts b/packages/hdwallet-native/src/crypto/isolation/adapters/fio.ts
index 947d6e5ff..c7ceb19e7 100644
--- a/packages/hdwallet-native/src/crypto/isolation/adapters/fio.ts
+++ b/packages/hdwallet-native/src/crypto/isolation/adapters/fio.ts
@@ -33,8 +33,7 @@ export class ExternalSignerAdapter implements FIOExternalPrivateKey {
     }
 
     async sign(signBuf: Uint8Array): Promise<string> {
-        const signBufHash = Digest.Algorithms["sha256"](signBuf);
-        const sig = await SecP256K1.RecoverableSignature.signCanonically(this._isolatedKey, signBufHash);
+        const sig = await SecP256K1.RecoverableSignature.signCanonically(this._isolatedKey, "sha256", signBuf);
         const fioSigBuf = core.compatibleBufferConcat([Buffer.from([sig.recoveryParam + 4 + 27]), SecP256K1.RecoverableSignature.r(sig), SecP256K1.RecoverableSignature.s(sig)]);
         return `SIG_K1_${bs58FioEncode(fioSigBuf, "K1")}`;
     }
diff --git a/packages/hdwallet-native/src/crypto/isolation/core/secp256k1/interfaces.ts b/packages/hdwallet-native/src/crypto/isolation/core/secp256k1/interfaces.ts
index 9ef8af7c2..900429458 100644
--- a/packages/hdwallet-native/src/crypto/isolation/core/secp256k1/interfaces.ts
+++ b/packages/hdwallet-native/src/crypto/isolation/core/secp256k1/interfaces.ts
@@ -1,5 +1,5 @@
 import { ByteArray, Uint32 } from "../../types";
-import { CurvePoint, Message, RecoverableSignature, Signature } from "./types";
+import { CurvePoint, RecoverableSignature, Signature } from "./types";
 import * as Digest from "../digest";
 
 export interface ECDSAKey {
@@ -12,13 +12,17 @@ export interface ECDSAKey {
     // This can be used, for example, to find a signature whose r-value does not have the MSB set (i.e. a lowR signature),
     // which can be encoded in DER format with one less byte. If an implementation does not support the use of the counter
     // value, it MUST return undefined rather than perform a signing operation which ignores it.
-    ecdsaSign(message: Message): Promise<NonNullable<Signature>>;
-    ecdsaSign(message: Message, counter: Uint32): Promise<NonNullable<Signature> | undefined>;
+    ecdsaSign(digestAlgorithm: null, message: ByteArray<32>): Promise<NonNullable<Signature>>;
+    ecdsaSign(digestAlgorithm: null, message: ByteArray<32>, counter: Uint32): Promise<NonNullable<Signature> | undefined>;
+    ecdsaSign(digestAlgorithm: Digest.AlgorithmName<32>, message: Uint8Array): Promise<NonNullable<Signature>>;
+    ecdsaSign(digestAlgorithm: Digest.AlgorithmName<32>, message: Uint8Array, counter: Uint32): Promise<NonNullable<Signature> | undefined>;
 }
 
 export interface ECDSARecoverableKey extends ECDSAKey {
-    ecdsaSign(message: Message): Promise<NonNullable<RecoverableSignature>>;
-    ecdsaSign(message: Message, counter: Uint32): Promise<NonNullable<RecoverableSignature> | undefined>;
+    ecdsaSign(digestAlgorithm: null, message: ByteArray<32>): Promise<NonNullable<RecoverableSignature>>;
+    ecdsaSign(digestAlgorithm: null, message: ByteArray<32>, counter: Uint32): Promise<NonNullable<RecoverableSignature> | undefined>;
+    ecdsaSign(digestAlgorithm: Digest.AlgorithmName<32>, message: Uint8Array): Promise<NonNullable<RecoverableSignature>>;
+    ecdsaSign(digestAlgorithm: Digest.AlgorithmName<32>, message: Uint8Array, counter: Uint32): Promise<NonNullable<RecoverableSignature> | undefined>;
 }
 
 export interface ECDHKey {
diff --git a/packages/hdwallet-native/src/crypto/isolation/core/secp256k1/types.ts b/packages/hdwallet-native/src/crypto/isolation/core/secp256k1/types.ts
index 8edfcbaa1..471ee59d6 100644
--- a/packages/hdwallet-native/src/crypto/isolation/core/secp256k1/types.ts
+++ b/packages/hdwallet-native/src/crypto/isolation/core/secp256k1/types.ts
@@ -4,8 +4,8 @@ import * as ethers from "ethers"
 import { Literal, Partial, Object as Obj, Static, Union } from "funtypes";
 import * as tinyecc from "tiny-secp256k1";
 
-import { Digest } from "../digest";
-import { BigEndianInteger, ByteArray, Uint32, checkType, safeBufferFrom } from "../../types";
+import * as Digest from "../digest";
+import { BigEndianInteger, ByteArray, Uint32, checkType, safeBufferFrom, assertType } from "../../types";
 import { ECDSAKey } from "./interfaces";
 
 const fieldElementBase = BigEndianInteger(32).withConstraint(
@@ -87,7 +87,7 @@ const recoveryParamStatic = {};
 const recoveryParam = Object.assign(recoveryParamBase, recoveryParamStatic);
 export const RecoveryParam: typeof recoveryParam = recoveryParam;
 
-const messageWithPreimageBase = ByteArray(32).And(Digest());
+const messageWithPreimageBase = ByteArray(32).And(Digest.Digest());
 export type MessageWithPreimage = Static<typeof messageWithPreimageBase>;
 const messageWithPreimageStatic = {};
 const messageWithPreimage = Object.assign(messageWithPreimageBase, ByteArray, messageWithPreimageStatic);
@@ -115,10 +115,18 @@ const signatureStatic = {
     isLowR: (x: Signature): boolean => { return !FieldElement.isHigh(Signature.r(x)); },
     isLowS: (x: Signature): boolean => { return !FieldElement.isHigh(Signature.s(x)); },
     isCanonical: (x: Signature): boolean => { return Signature.isLowR(x) && Signature.isLowS(x); },
-    signCanonically: async (x: ECDSAKey, message: Message, counter?: Uint32): Promise<Signature> => {
+    signCanonically: async (x: ECDSAKey, digestAlgorithm: Digest.AlgorithmName<32> | null, message: Uint8Array, counter?: Uint32): Promise<Signature> => {
+        assertType(ByteArray(), message);
         counter === undefined || Uint32.assert(counter);
         for (let i = counter; i === undefined || i < (counter ?? 0) + 128; i = (i ?? -1) + 1) {
-            const sig = i === undefined ? await x.ecdsaSign(message) : await x.ecdsaSign(message, i);
+            const sig = await (async () => {
+              if (digestAlgorithm === null) {
+                assertType(ByteArray(32), message);
+                return i === undefined ? await x.ecdsaSign(digestAlgorithm, message) : await x.ecdsaSign(digestAlgorithm, message, i);
+              } else {
+                return i === undefined ? await x.ecdsaSign(digestAlgorithm, message) : await x.ecdsaSign(digestAlgorithm, message, i);
+              }
+            })();
             if (sig === undefined) break;
             //TODO: do integrated lowS correction
             if (Signature.isCanonical(sig)) return sig;
@@ -126,8 +134,9 @@ const signatureStatic = {
         // This is cryptographically impossible (2^-128 chance) if the key is implemented correctly.
         throw new Error(`Unable to generate canonical signature with public key ${x} over message ${message}; is your key implementation broken?`);
     },
-    verify: (x: Signature, message: Message, publicKey: CurvePoint): boolean => {
-        return tinyecc.verify(Buffer.from(message), Buffer.from(publicKey), Buffer.from(x));
+    verify: (x: Signature, digestAlgorithm: Digest.AlgorithmName<32> | null, message: Uint8Array, publicKey: CurvePoint): boolean => {
+        const msgOrDigest = digestAlgorithm === null ? checkType(ByteArray(32), message) : Digest.Algorithms[digestAlgorithm](checkType(ByteArray(), message));
+        return tinyecc.verify(Buffer.from(msgOrDigest), Buffer.from(publicKey), Buffer.from(x));
     },
 };
 const signature = Object.assign(signatureBase, ByteArray, signatureStatic);
@@ -143,34 +152,42 @@ const recoverableSignatureStatic = {
         out.recoveryParam = checkType(RecoveryParam, x[64]);
         return checkType(RecoverableSignature, out);
     },
-    fromSignature: (x: Signature, message: Message, publicKey: CurvePoint): RecoverableSignature => {
-        if (RecoverableSignature.test(x)) return x;
+    fromSignature: (x: Signature, digestAlgorithm: Digest.AlgorithmName<32> | null, message: Uint8Array, publicKey: CurvePoint): RecoverableSignature => {
         const out = Buffer.from(x) as Uint8Array as RecoverableSignature;
         for (out.recoveryParam = 0; out.recoveryParam < 4; out.recoveryParam++) {
-            if (!CurvePoint.equal(publicKey, RecoverableSignature.recoverPublicKey(out, message))) continue;
+            if (!CurvePoint.equal(publicKey, RecoverableSignature.recoverPublicKey(out, digestAlgorithm, message))) continue;
             return checkType(RecoverableSignature, out);
         }
-        throw new Error(`couldn't find recovery parameter producing public key ${publicKey} for signature ${x} over message ${message}`);
+        throw new Error(`couldn't find recovery parameter producing public key ${publicKey} for signature ${x} over message ${message}${digestAlgorithm !== null ? `using digest algorithm ${digestAlgorithm}` : ""}`);
     },
     isLowRecoveryParam: (x: RecoverableSignature) => x.recoveryParam === 0 || x.recoveryParam === 1,
     isCanonical: (x: RecoverableSignature): boolean => Signature.isCanonical(x) && RecoverableSignature.isLowRecoveryParam(x),
-    signCanonically: async (x: ECDSAKey, message: Message, counter?: Uint32): Promise<RecoverableSignature> => {
+    signCanonically: async (x: ECDSAKey, digestAlgorithm: Digest.AlgorithmName<32> | null, message: Uint8Array, counter?: Uint32): Promise<RecoverableSignature> => {
         const publicKey = await x.publicKey;
+        assertType(ByteArray(), message);
         counter === undefined || Uint32.assert(counter);
         for (let i = counter; i === undefined || i < (counter ?? 0) + 128; i = (i ?? -1) + 1) {
-            const sig = i === undefined ? await x.ecdsaSign(message) : await x.ecdsaSign(message, i);
+            const sig = await (async () => {
+                if (digestAlgorithm === null) {
+                  assertType(ByteArray(32), message);
+                  return i === undefined ? await x.ecdsaSign(digestAlgorithm, message) : await x.ecdsaSign(digestAlgorithm, message, i);
+                } else {
+                  return i === undefined ? await x.ecdsaSign(digestAlgorithm, message) : await x.ecdsaSign(digestAlgorithm, message, i);
+                }
+              })();
             if (sig === undefined) break;
-            const recoverableSig = RecoverableSignature.fromSignature(sig, message, publicKey);
+            const recoverableSig = RecoverableSignature.fromSignature(sig, digestAlgorithm, message, publicKey);
             //TODO: do integrated lowS correction
             if (RecoverableSignature.isCanonical(recoverableSig)) return recoverableSig;
         }
         // This is cryptographically impossible (2^-128 chance) if the key is implemented correctly.
         throw new Error(`Unable to generate canonical recoverable signature with public key ${Buffer.from(publicKey).toString("hex")} over message ${Buffer.from(message).toString("hex")}; is your key implementation broken?`);
     },
-    recoverPublicKey: (x: RecoverableSignature, message: Message): CurvePoint => {
+    recoverPublicKey: (x: RecoverableSignature, digestAlgorithm: Digest.AlgorithmName<32> | null, message: Uint8Array): CurvePoint => {
       // TODO: do this better
+      const msgOrDigest = digestAlgorithm === null ? checkType(ByteArray(32), message) : Digest.Algorithms[digestAlgorithm](checkType(ByteArray(), message));
       const ethSigBytes = core.compatibleBufferConcat([x, Buffer.from([x.recoveryParam])]);
-      const ethRecovered = ethers.utils.recoverPublicKey(message, ethers.utils.splitSignature(ethSigBytes));
+      const ethRecovered = ethers.utils.recoverPublicKey(msgOrDigest, ethers.utils.splitSignature(ethSigBytes));
       return checkType(UncompressedPoint, Buffer.from(ethRecovered.slice(2), "hex"));
     },
 };
diff --git a/packages/hdwallet-native/src/crypto/isolation/engines/default/bip32.ts b/packages/hdwallet-native/src/crypto/isolation/engines/default/bip32.ts
index 64842d015..aa4759256 100644
--- a/packages/hdwallet-native/src/crypto/isolation/engines/default/bip32.ts
+++ b/packages/hdwallet-native/src/crypto/isolation/engines/default/bip32.ts
@@ -54,20 +54,24 @@ export class Node implements BIP32.Node, SecP256K1.ECDSARecoverableKey, SecP256K
         return this.#publicKey;
     }
 
-    async ecdsaSign(msg: SecP256K1.Message, counter?: Uint32): Promise<SecP256K1.RecoverableSignature> {
-        SecP256K1.Message.assert(msg);
+    async ecdsaSign(digestAlgorithm: null, msg: ByteArray<32>, counter?: Uint32): Promise<SecP256K1.RecoverableSignature>
+    async ecdsaSign(digestAlgorithm: Digest.AlgorithmName<32>, msg: Uint8Array, counter?: Uint32): Promise<SecP256K1.RecoverableSignature>
+    async ecdsaSign(digestAlgorithm: Digest.AlgorithmName<32> | null, msg: Uint8Array, counter?: Uint32): Promise<SecP256K1.RecoverableSignature> {
         counter === undefined || Uint32.assert(counter);
+        digestAlgorithm === null || Digest.AlgorithmName(32).assert(digestAlgorithm);
 
         // When running tests, this will keep us aware of any codepaths that don't pass in the preimage
-        if (typeof expect === "function") expect(SecP256K1.MessageWithPreimage.test(msg)).toBeTruthy();
+        if (typeof expect === "function") expect(digestAlgorithm).not.toBeNull();
 
+        const msgOrDigest = digestAlgorithm === null ? checkType(ByteArray(32), msg) : Digest.Algorithms[digestAlgorithm](checkType(ByteArray(), msg));
         const entropy = (counter === undefined ? undefined : Buffer.alloc(32));
         entropy?.writeUInt32BE(counter ?? 0, 24);
         return SecP256K1.RecoverableSignature.fromSignature(
             checkType(SecP256K1.Signature, (tinyecc as typeof tinyecc & {
                 signWithEntropy: (message: Buffer, privateKey: Buffer, entropy?: Buffer) => Buffer,
-            }).signWithEntropy(Buffer.from(msg), this.#privateKey, entropy)),
-            msg,
+            }).signWithEntropy(Buffer.from(msgOrDigest), this.#privateKey, entropy)),
+            null,
+            msgOrDigest,
             this.publicKey,
         );
     }
diff --git a/packages/hdwallet-native/src/crypto/isolation/types.ts b/packages/hdwallet-native/src/crypto/isolation/types.ts
index ed9a937d1..aa05f5d15 100644
--- a/packages/hdwallet-native/src/crypto/isolation/types.ts
+++ b/packages/hdwallet-native/src/crypto/isolation/types.ts
@@ -74,9 +74,13 @@ const boundedStringStatic = {};
 const boundedString = Object.assign(boundedStringBase, boundedStringStatic);
 export const BoundedString: typeof boundedString = boundedString;
 
-export function checkType<T extends Runtype<unknown>>(rt: T, value: any): Static<T> {
+export function assertType<T extends Runtype<unknown>>(rt: T, value: unknown): asserts value is Static<T> {
     rt.assert(value);
-    return value as Static<T>;
+}
+
+export function checkType<T extends Runtype<unknown>>(rt: T, value: unknown): Static<T> {
+    assertType(rt, value);
+    return value;
 }
 
 // export function ParseWorkaround<T, U extends Runtype<T>>(rt: U) {