diff --git a/packages/web3/src/codec/array-codec.ts b/packages/web3/src/codec/array-codec.ts
index 07ae7b889..50579a584 100644
--- a/packages/web3/src/codec/array-codec.ts
+++ b/packages/web3/src/codec/array-codec.ts
@@ -56,7 +56,7 @@ export class ArrayCodec<T> implements Codec<T[]> {
 
   fromArray(inputs: T[]): DecodedArray<T> {
     return {
-      length: compactUnsignedIntCodec.decode(compactUnsignedIntCodec.encodeU32(inputs.length)),
+      length: compactUnsignedIntCodec.fromU32(inputs.length),
       value: inputs
     }
   }
diff --git a/packages/web3/src/codec/asset-output-codec.ts b/packages/web3/src/codec/asset-output-codec.ts
index ffef84228..0d58c9153 100644
--- a/packages/web3/src/codec/asset-output-codec.ts
+++ b/packages/web3/src/codec/asset-output-codec.ts
@@ -115,24 +115,23 @@ export class AssetOutputCodec implements Codec<AssetOutput> {
   }
 
   static fromFixedAssetOutput(fixedOutput: FixedAssetOutput): AssetOutput {
-    const amount: DecodedCompactInt = compactUnsignedIntCodec.decode(
-      compactUnsignedIntCodec.encodeU256(BigInt(fixedOutput.attoAlphAmount))
-    )
+    const amount: DecodedCompactInt = compactUnsignedIntCodec.fromU256(BigInt(fixedOutput.attoAlphAmount))
+
     const lockTime: Buffer = longCodec.encode(BigInt(fixedOutput.lockTime))
     const lockupScript: LockupScript = lockupScriptCodec.decode(Buffer.from(bs58.decode(fixedOutput.address)))
     const tokensValue = fixedOutput.tokens.map((token) => {
       return {
         tokenId: Buffer.from(token.id, 'hex'),
-        amount: compactUnsignedIntCodec.decode(compactUnsignedIntCodec.encodeU256(BigInt(token.amount)))
+        amount: compactUnsignedIntCodec.fromU256(BigInt(token.amount))
       }
     })
     const tokens: DecodedArray<Token> = {
-      length: compactUnsignedIntCodec.decode(compactUnsignedIntCodec.encodeU32(tokensValue.length)),
+      length: compactUnsignedIntCodec.fromU32(tokensValue.length),
       value: tokensValue
     }
     const additionalDataValue = Buffer.from(fixedOutput.message, 'hex')
     const additionalData: ByteString = {
-      length: compactUnsignedIntCodec.decode(compactUnsignedIntCodec.encodeU32(additionalDataValue.length)),
+      length: compactUnsignedIntCodec.fromU32(additionalDataValue.length),
       value: additionalDataValue
     }
 
diff --git a/packages/web3/src/codec/compact-int-codec.ts b/packages/web3/src/codec/compact-int-codec.ts
index f51c6b8cb..9ce6e99c5 100644
--- a/packages/web3/src/codec/compact-int-codec.ts
+++ b/packages/web3/src/codec/compact-int-codec.ts
@@ -130,6 +130,10 @@ export class CompactUnsignedIntCodec implements Codec<DecodedCompactInt> {
     return decodePositiveInt(value.mode, body)
   }
 
+  fromU32(value: number): DecodedCompactInt {
+    return this.decode(this.encodeU32(value))
+  }
+
   toU256(value: DecodedCompactInt): bigint {
     const mode = value.mode & maskRest
     if (fixedSize(mode)) {
@@ -139,6 +143,10 @@ export class CompactUnsignedIntCodec implements Codec<DecodedCompactInt> {
       return BigIntCodec.decode(Buffer.from(value.rest), false)
     }
   }
+
+  fromU256(value: bigint): DecodedCompactInt {
+    return this.decode(this.encodeU256(value))
+  }
 }
 
 export const compactUnsignedIntCodec = new CompactUnsignedIntCodec()
@@ -244,6 +252,10 @@ export class CompactSignedIntCodec implements Codec<DecodedCompactInt> {
     }
   }
 
+  fromI32(value: number): DecodedCompactInt {
+    return this.decode(this.encodeI32(value))
+  }
+
   toI256(value: DecodedCompactInt): bigint {
     const mode = value.mode & maskRest
 
@@ -254,6 +266,10 @@ export class CompactSignedIntCodec implements Codec<DecodedCompactInt> {
       return BigIntCodec.decode(Buffer.from(value.rest), true)
     }
   }
+
+  fromI256(value: bigint): DecodedCompactInt {
+    return this.decode(this.encodeI256(value))
+  }
 }
 
 export const compactSignedIntCodec = new CompactSignedIntCodec()
diff --git a/packages/web3/src/codec/contract-output-codec.ts b/packages/web3/src/codec/contract-output-codec.ts
index ab5b5a291..dcf86c970 100644
--- a/packages/web3/src/codec/contract-output-codec.ts
+++ b/packages/web3/src/codec/contract-output-codec.ts
@@ -73,20 +73,18 @@ export class ContractOutputCodec implements Codec<ContractOutput> {
   }
 
   static convertToOutput(apiContractOutput: ApiContractOutput): ContractOutput {
-    const amount: DecodedCompactInt = compactUnsignedIntCodec.decode(
-      compactUnsignedIntCodec.encodeU256(BigInt(apiContractOutput.attoAlphAmount))
-    )
+    const amount: DecodedCompactInt = compactUnsignedIntCodec.fromU256(BigInt(apiContractOutput.attoAlphAmount))
     const lockupScript: P2C = lockupScriptCodec.decode(Buffer.from(bs58.decode(apiContractOutput.address)))
       .script as P2C
 
     const tokensValue = apiContractOutput.tokens.map((token) => {
       return {
         tokenId: Buffer.from(token.id, 'hex'),
-        amount: compactUnsignedIntCodec.decode(compactUnsignedIntCodec.encodeU256(BigInt(token.amount)))
+        amount: compactUnsignedIntCodec.fromU256(BigInt(token.amount))
       }
     })
     const tokens: DecodedArray<Token> = {
-      length: compactUnsignedIntCodec.decode(compactUnsignedIntCodec.encodeU32(tokensValue.length)),
+      length: compactUnsignedIntCodec.fromU32(tokensValue.length),
       value: tokensValue
     }
 
diff --git a/packages/web3/src/codec/token-codec.test.ts b/packages/web3/src/codec/token-codec.test.ts
index ee42660a5..8727e8c83 100644
--- a/packages/web3/src/codec/token-codec.test.ts
+++ b/packages/web3/src/codec/token-codec.test.ts
@@ -36,7 +36,7 @@ describe('Encode & decode tokens', function () {
   function success(tokenIn: { id: string; amount: bigint }) {
     const token = {
       tokenId: Buffer.from(tokenIn.id, 'hex'),
-      amount: compactUnsignedIntCodec.decode(compactUnsignedIntCodec.encodeU256(tokenIn.amount))
+      amount: compactUnsignedIntCodec.fromU256(tokenIn.amount)
     }
     const encoded = tokenCodec.encode(token)
     const decoded = tokenCodec.decode(encoded)
diff --git a/packages/web3/src/codec/unsigned-tx-codec.ts b/packages/web3/src/codec/unsigned-tx-codec.ts
index 81d02f778..9e3618f62 100644
--- a/packages/web3/src/codec/unsigned-tx-codec.ts
+++ b/packages/web3/src/codec/unsigned-tx-codec.ts
@@ -107,8 +107,8 @@ export class UnsignedTxCodec implements Codec<UnsignedTx> {
   static fromApiUnsignedTx(unsignedTx: ApiUnsignedTx): UnsignedTx {
     const version = unsignedTx.version
     const networkId = unsignedTx.networkId
-    const gasAmount = compactSignedIntCodec.decode(compactSignedIntCodec.encodeI32(unsignedTx.gasAmount))
-    const gasPrice = compactUnsignedIntCodec.decode(compactUnsignedIntCodec.encodeU256(BigInt(unsignedTx.gasPrice)))
+    const gasAmount = compactSignedIntCodec.fromI32(unsignedTx.gasAmount)
+    const gasPrice = compactUnsignedIntCodec.fromU256(BigInt(unsignedTx.gasPrice))
     const inputsValue = InputCodec.fromAssetInputs(unsignedTx.inputs)
     const inputs = inputsCodec.fromArray(inputsValue)
     const fixedOutputsValue = AssetOutputCodec.fromFixedAssetOutputs(unsignedTx.fixedOutputs)