Constructor
new ContractSpec(entries)
Constructs a new ContractSpec from an array of XDR spec entries.
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Parameters:
| Name | Type | Description |
|---|---|---|
entries |
Array.<xdr.ScSpecEntry>
|
Array.<string>
|
the XDR spec entries |
Throws:
-
if entries is invalid
- Type
-
Error
Example
const specEntries = [...]; // XDR spec entries of a smart contract
const contractSpec = new ContractSpec(specEntries);
// Convert native value to ScVal
const args = {
arg1: 'value1',
arg2: 1234
};
const scArgs = contractSpec.funcArgsToScVals('funcName', args);
// Call contract
const resultScv = await callContract(contractId, 'funcName', scArgs);
// Convert result ScVal back to native value
const result = contractSpec.funcResToNative('funcName', resultScv);
console.log(result); // {success: true}Methods
findEntry(name) → {xdr.ScSpecEntry}
Finds the XDR spec entry for the given name.
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Parameters:
| Name | Type | Description |
|---|---|---|
name |
string
|
the name to find |
Throws:
-
if no entry with the given name exists
- Type
-
Error
Returns:
- Type:
-
xdr.ScSpecEntry
the entry
funcArgsToScVals(name, args) → {Array.<xdr.ScVal>}
Converts native JS arguments to ScVals for calling a contract function.
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Parameters:
| Name | Type | Description |
|---|---|---|
name |
string
|
the name of the function |
args |
Object
|
the arguments object |
Throws:
-
if argument is missing or incorrect type
- Type
-
Error
Returns:
- Type:
-
Array.<xdr.ScVal>
the converted arguments
Example
```js
const args = {
arg1: 'value1',
arg2: 1234
};
const scArgs = contractSpec.funcArgsToScVals('funcName', args);
```funcResToNative(name, val_or_base64) → {any}
Converts the result ScVal of a function call to a native JS value.
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Parameters:
| Name | Type | Description |
|---|---|---|
name |
string
|
the name of the function |
val_or_base64 |
xdr.ScVal
|
string
|
the result ScVal or base64 encoded string |
Throws:
-
if return type mismatch or invalid input
- Type
-
Error
Returns:
- Type:
-
any
the converted native value
Example
```js
const resultScv = 'AAA=='; // Base64 encoded ScVal
const result = contractSpec.funcResToNative('funcName', resultScv);
```getFunc(name) → {xdr.ScSpecFunctionV0}
Gets the XDR function spec for the given function name.
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Parameters:
| Name | Type | Description |
|---|---|---|
name |
string
|
the name of the function |
Throws:
-
if no function with the given name exists
- Type
-
Error
Returns:
- Type:
-
xdr.ScSpecFunctionV0
the function spec
nativeToScVal(val, tyopt) → {xdr.ScVal}
Converts a native JS value to an ScVal based on the given type.
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Parameters:
| Name | Type | Attributes | Description |
|---|---|---|---|
val |
any
|
the native JS value |
|
ty |
xdr.ScSpecTypeDef
|
<optional> |
the expected type |
Throws:
-
if value cannot be converted to the given type
- Type
-
Error
Returns:
- Type:
-
xdr.ScVal
the converted ScVal
scValStrToNative(scv, typeDef) → {any}
Converts an base64 encoded ScVal back to a native JS value based on the given type.
- Source:
Parameters:
| Name | Type | Description |
|---|---|---|
scv |
string
|
the base64 encoded ScVal |
typeDef |
xdr.ScSpecTypeDef
|
the expected type |
Throws:
-
if ScVal cannot be converted to the given type
- Type
-
Error
Returns:
- Type:
-
any
the converted native JS value
scValToNative(scv, typeDef) → {any}
Converts an ScVal back to a native JS value based on the given type.
- Source:
Parameters:
| Name | Type | Description |
|---|---|---|
scv |
xdr.ScVal
|
the ScVal |
typeDef |
xdr.ScSpecTypeDef
|
the expected type |
Throws:
-
if ScVal cannot be converted to the given type
- Type
-
Error
Returns:
- Type:
-
any
the converted native JS value