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fix(credential): unify normalization of context #146

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fix(credential): unify normalization of context #146

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6 changes: 5 additions & 1 deletion lib/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -540,8 +540,12 @@ export function _checkCredential({credential, now = new Date()}) {
if(typeof now === 'string') {
now = new Date(now);
}
// normalize to an array to allow the common case of context being a string
const context = Array.isArray(credential['@context']) ?
credential['@context'] : [credential['@context']];

// ensure first context is 'https://www.w3.org/2018/credentials/v1'
if(credential['@context'][0] !== CREDENTIALS_CONTEXT_V1_URL) {
if(context[0] !== CREDENTIALS_CONTEXT_V1_URL) {
throw new Error(
`"${CREDENTIALS_CONTEXT_V1_URL}" needs to be first in the ` +
'list of contexts.');
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