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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| import BigNumber from "bignumber.js"; | ||
| import { BigIntType, BigIntValue, ManagedDecimalSignedType, ManagedDecimalSignedValue, U32Value } from "../typesystem"; | ||
| import { BinaryCodec } from "./binary"; | ||
| import { bufferToBigInt } from "./utils"; | ||
| import { SizeOfU32 } from "./constants"; | ||
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| export class ManagedDecimalSignedCodec { | ||
| private readonly binaryCodec: BinaryCodec; | ||
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| constructor(binaryCodec: BinaryCodec) { | ||
| this.binaryCodec = binaryCodec; | ||
| } | ||
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| decodeNested(buffer: Buffer, type: ManagedDecimalSignedType): [ManagedDecimalSignedValue, number] { | ||
| const length = buffer.readUInt32BE(0); | ||
| const payload = buffer.slice(0, length); | ||
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| const result = this.decodeTopLevel(payload, type); | ||
| return [result, length]; | ||
| } | ||
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| decodeTopLevel(buffer: Buffer, type: ManagedDecimalSignedType): ManagedDecimalSignedValue { | ||
| if (buffer.length === 0) { | ||
| return new ManagedDecimalSignedValue(new BigNumber(0), 0); | ||
| } | ||
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| if (type.isVariable()) { | ||
| const bigUintSize = buffer.length - SizeOfU32; | ||
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| const [value] = this.binaryCodec.decodeNested(buffer.slice(0, bigUintSize), new BigIntType()); | ||
| const scale = buffer.readUInt32BE(bigUintSize); | ||
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| return new ManagedDecimalSignedValue(value.valueOf(), scale); | ||
| } | ||
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| const value = bufferToBigInt(buffer); | ||
| const metadata = type.getMetadata(); | ||
| const scale = metadata !== "usize" ? parseInt(metadata.toString()) : 0; | ||
| return new ManagedDecimalSignedValue(value.shiftedBy(-scale), scale); | ||
| } | ||
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| encodeNested(value: ManagedDecimalSignedValue): Buffer { | ||
| let buffers: Buffer[] = []; | ||
| if (value.isVariable()) { | ||
| buffers.push(Buffer.from(this.binaryCodec.encodeNested(new BigIntValue(new BigNumber("23.000000000"))))); | ||
| buffers.push(Buffer.from(this.binaryCodec.encodeNested(new U32Value(value.getScale())))); | ||
| } else { | ||
| buffers.push(Buffer.from(this.binaryCodec.encodeTopLevel(new BigIntValue(23.0)))); | ||
| } | ||
| return Buffer.concat(buffers); | ||
| } | ||
|
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| encodeTopLevel(value: ManagedDecimalSignedValue): Buffer { | ||
| return this.encodeNested(value); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| import BigNumber from "bignumber.js"; | ||
| import { Type, TypedValue } from "./types"; | ||
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| export class ManagedDecimalSignedType extends Type { | ||
| static ClassName = "ManagedDecimalSignedType"; | ||
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| constructor(metadata: number | "usize") { | ||
| super("ManagedDecimalSigned", undefined, undefined, metadata); | ||
| } | ||
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| getClassName(): string { | ||
| return ManagedDecimalSignedType.ClassName; | ||
| } | ||
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| getMetadata(): number | "usize" { | ||
| return this.metadata; | ||
| } | ||
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| isVariable(): boolean { | ||
| return this.metadata == "usize"; | ||
| } | ||
| } | ||
|
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| export class ManagedDecimalSignedValue extends TypedValue { | ||
| static ClassName = "ManagedDecimalSignedValue"; | ||
| private readonly value: BigNumber; | ||
| private readonly scale: number; | ||
| private readonly variable: boolean; | ||
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| constructor(value: BigNumber.Value, scale: number, isVariable: boolean = false) { | ||
| super(new ManagedDecimalSignedType(isVariable ? "usize" : scale)); | ||
| this.value = new BigNumber(value); | ||
| this.scale = scale; | ||
| this.variable = isVariable; | ||
| } | ||
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| getClassName(): string { | ||
| return ManagedDecimalSignedValue.ClassName; | ||
| } | ||
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| getPrecision(): number { | ||
| return this.value.toFixed(this.scale).replace(".", "").length; | ||
| } | ||
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| getScale(): number { | ||
| return this.scale; | ||
| } | ||
|
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| /** | ||
| * Returns whether two objects have the same value. | ||
| */ | ||
| equals(other: ManagedDecimalSignedValue): boolean { | ||
| if (this.getPrecision() != other.getPrecision()) { | ||
| return false; | ||
| } | ||
|
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| return new BigNumber(this.value).eq(other.value); | ||
| } | ||
|
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| valueOf(): BigNumber { | ||
| return this.value; | ||
| } | ||
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| toString(): string { | ||
| return this.value.toFixed(this.scale); | ||
| } | ||
|
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| isVariable(): boolean { | ||
| return this.variable; | ||
| } | ||
| } |
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