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Merge pull request #359 from stellar/amm
AMM SDK Updates
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| package org.stellar.sdk; | ||
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| import com.google.common.base.Objects; | ||
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| public final class AssetAmount { | ||
| private final Asset asset; | ||
| private final String amount; | ||
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| AssetAmount(Asset asset, String amount) { | ||
| this.asset = asset; | ||
| this.amount = amount; | ||
| } | ||
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| public Asset getAsset() { | ||
| return this.asset; | ||
| } | ||
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| public String getAmount() { | ||
| return this.amount; | ||
| } | ||
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| public int hashCode() { | ||
| return Objects.hashCode(asset, amount); | ||
| } | ||
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| @Override | ||
| public boolean equals(Object object) { | ||
| if (!(object instanceof AssetAmount)) { | ||
| return false; | ||
| } | ||
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| AssetAmount o = (AssetAmount) object; | ||
| return Objects.equal(this.getAsset(), o.getAsset()) && | ||
| Objects.equal(this.getAmount(), o.getAmount()); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,132 @@ | ||
| package org.stellar.sdk; | ||
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| import static com.google.common.base.Preconditions.checkNotNull; | ||
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| /** | ||
| * ChangeTrustAsset class. | ||
| * @see <a href="https://www.stellar.org/developers/learn/concepts/assets.html" target="_blank">Assets</a> | ||
| */ | ||
| public abstract class ChangeTrustAsset implements Comparable<ChangeTrustAsset> { | ||
| ChangeTrustAsset() {} | ||
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| /** | ||
| * Parses an asset string and returns the equivalent ChangeTrustAsset instance. | ||
| * The asset string is expected to either be "native" or a string of the form "CODE:ISSUER" | ||
| * | ||
| * @param canonicalForm Canonical string representation of an asset | ||
| */ | ||
| public static ChangeTrustAsset create(String canonicalForm) { | ||
| return new Wrapper(Asset.create(canonicalForm)); | ||
| } | ||
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| public static ChangeTrustAsset create(String type, String code, String issuer) { | ||
| return new Wrapper(Asset.create(type, code, issuer)); | ||
| } | ||
| public static ChangeTrustAsset create(Asset asset) { | ||
| return new Wrapper(asset); | ||
| } | ||
| public static ChangeTrustAsset create(LiquidityPoolParameters params) { | ||
| return new LiquidityPoolShareChangeTrustAsset(params); | ||
| } | ||
| public static ChangeTrustAsset create(TrustLineAsset.Wrapper wrapper) { | ||
| return new Wrapper(wrapper.getAsset()); | ||
| } | ||
| // Cannot convert from LiquidityPoolShareTrustLineAsset, as that only has a | ||
| // liquidity pool id, not parameters. | ||
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| /** | ||
| * Creates one of AssetTypeCreditAlphaNum4 or AssetTypeCreditAlphaNum12 object based on a <code>code</code> length | ||
| * @param code ChangeTrustAsset code | ||
| * @param issuer ChangeTrustAsset issuer | ||
| */ | ||
| public static ChangeTrustAsset createNonNativeAsset(String code, String issuer) { | ||
| return ChangeTrustAsset.create(Asset.createNonNativeAsset(code, issuer)); | ||
| } | ||
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| /** | ||
| * Generates ChangeTrustAsset object from a given XDR object | ||
| * @param xdr XDR object | ||
| */ | ||
| public static ChangeTrustAsset fromXdr(org.stellar.sdk.xdr.ChangeTrustAsset xdr) { | ||
| // TODO: Figure out how we can re-use Asset.fromXdr here | ||
| String accountId; | ||
| switch (xdr.getDiscriminant()) { | ||
| case ASSET_TYPE_NATIVE: | ||
| return ChangeTrustAsset.create(new AssetTypeNative()); | ||
| case ASSET_TYPE_CREDIT_ALPHANUM4: | ||
| String assetCode4 = Util.paddedByteArrayToString(xdr.getAlphaNum4().getAssetCode().getAssetCode4()); | ||
| accountId = StrKey.encodeStellarAccountId(xdr.getAlphaNum4().getIssuer()); | ||
| return ChangeTrustAsset.create(new AssetTypeCreditAlphaNum4(assetCode4, accountId)); | ||
| case ASSET_TYPE_CREDIT_ALPHANUM12: | ||
| String assetCode12 = Util.paddedByteArrayToString(xdr.getAlphaNum12().getAssetCode().getAssetCode12()); | ||
| accountId = StrKey.encodeStellarAccountId(xdr.getAlphaNum12().getIssuer()); | ||
| return ChangeTrustAsset.create(new AssetTypeCreditAlphaNum12(assetCode12, accountId)); | ||
| case ASSET_TYPE_POOL_SHARE: | ||
| return new LiquidityPoolShareChangeTrustAsset(LiquidityPoolParameters.fromXdr(xdr.getLiquidityPool())); | ||
| default: | ||
| throw new IllegalArgumentException("Unknown asset type " + xdr.getDiscriminant()); | ||
| } | ||
| } | ||
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| public abstract String getType(); | ||
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| @Override | ||
| public abstract boolean equals(Object object); | ||
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| @Override | ||
| public abstract int compareTo(ChangeTrustAsset other); | ||
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| /** | ||
| * Generates XDR object from a given ChangeTrustAsset object | ||
| */ | ||
| public abstract org.stellar.sdk.xdr.ChangeTrustAsset toXdr(); | ||
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| public static final class Wrapper extends ChangeTrustAsset { | ||
| private Asset asset; | ||
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| public Wrapper(Asset baseAsset) { | ||
| super(); | ||
| checkNotNull(baseAsset, "asset cannot be null"); | ||
| asset = baseAsset; | ||
| } | ||
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| public Asset getAsset() { | ||
| return asset; | ||
| } | ||
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| @Override | ||
| public String getType() { | ||
| return asset.getType(); | ||
| } | ||
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| @Override | ||
| public final boolean equals(Object object) { | ||
| if (object == null || !this.getClass().equals(object.getClass())) { | ||
| return false; | ||
| } | ||
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| ChangeTrustAsset.Wrapper o = (ChangeTrustAsset.Wrapper) object; | ||
| return this.getAsset().equals(o.getAsset()); | ||
| } | ||
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| @Override | ||
| public int compareTo(ChangeTrustAsset other) { | ||
| if (other.getType() == "pool_share") { | ||
| return -1; | ||
| } | ||
| return this.getAsset().compareTo(((ChangeTrustAsset.Wrapper) other).getAsset()); | ||
| } | ||
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| @Override | ||
| public org.stellar.sdk.xdr.ChangeTrustAsset toXdr() { | ||
| org.stellar.sdk.xdr.ChangeTrustAsset xdr = new org.stellar.sdk.xdr.ChangeTrustAsset(); | ||
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| org.stellar.sdk.xdr.Asset assetXdr = asset.toXdr(); | ||
| xdr.setDiscriminant(assetXdr.getDiscriminant()); | ||
| xdr.setAlphaNum4(assetXdr.getAlphaNum4()); | ||
| xdr.setAlphaNum12(assetXdr.getAlphaNum12()); | ||
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| return xdr; | ||
| } | ||
| } | ||
| } |
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